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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux 

Pull s390 updates from Martin Schwidefsky:
 "The first part of the s390 updates for 4.14:

   - Add machine type 0x3906 for IBM z14

   - Add IBM z14 TLB flushing improvements for KVM guests

   - Exploit the TOD clock epoch extension to provide a continuous TOD
     clock afer 2042/09/17

   - Add NIAI spinlock hints for IBM z14

   - Rework the vmcp driver and use CMA for the respone buffer of z/VM
     CP commands

   - Drop some s390 specific asm headers and use the generic version

   - Add block discard for DASD-FBA devices under z/VM

   - Add average request times to DASD statistics

   - A few of those constify patches which seem to be in vogue right now

   - Cleanup and bug fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (50 commits)
  s390/mm: avoid empty zero pages for KVM guests to avoid postcopy hangs
  s390/dasd: Add discard support for FBA devices
  s390/zcrypt: make CPRBX const
  s390/uaccess: avoid mvcos jump label
  s390/mm: use generic mm_hooks
  s390/facilities: fix typo
  s390/vmcp: simplify vmcp_response_free()
  s390/topology: Remove the unused parent_node() macro
  s390/dasd: Change unsigned long long to unsigned long
  s390/smp: convert cpuhp_setup_state() return code to zero on success
  s390: fix 'novx' early parameter handling
  s390/dasd: add average request times to dasd statistics
  s390/scm: use common completion path
  s390/pci: log changes to uid checking
  s390/vmcp: simplify vmcp_ioctl()
  s390/vmcp: return -ENOTTY for unknown ioctl commands
  s390/vmcp: split vmcp header file and move to uapi
  s390/vmcp: make use of contiguous memory allocator
  s390/cpcmd,vmcp: avoid GFP_DMA allocations
  s390/vmcp: fix uaccess check and avoid undefined behavior
  ...
This commit is contained in:
Linus Torvalds 2017-09-05 09:45:46 -07:00
parent 6caffe21dd fa41ba0d08
commit 9e85ae6af6
87 changed files with 1406 additions and 695 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
Documentation/admin-guide/kernel-parameters.txt
View File

@ -4395,6 +4395,10 @@
decrease the size and leave more room for directly
mapped kernel RAM.
vmcp_cma=nn[MG] [KNL,S390]
Sets the memory size reserved for contiguous memory
allocations for the vmcp device driver.
vmhalt= [KNL,S390] Perform z/VM CP command after system halt.
Format: <command>

18
arch/s390/Kconfig
View File

@ -222,6 +222,10 @@ config HAVE_MARCH_Z13_FEATURES
def_bool n
select HAVE_MARCH_ZEC12_FEATURES
config HAVE_MARCH_Z14_FEATURES
def_bool n
select HAVE_MARCH_Z13_FEATURES
choice
prompt "Processor type"
default MARCH_Z196
@ -282,6 +286,14 @@ config MARCH_Z13
2964 series). The kernel will be slightly faster but will not work on
older machines.
config MARCH_Z14
bool "IBM z14"
select HAVE_MARCH_Z14_FEATURES
help
Select this to enable optimizations for IBM z14 (3906 series).
The kernel will be slightly faster but will not work on older
machines.
endchoice
config MARCH_Z900_TUNE
@ -305,6 +317,9 @@ config MARCH_ZEC12_TUNE
config MARCH_Z13_TUNE
def_bool TUNE_Z13 || MARCH_Z13 && TUNE_DEFAULT
config MARCH_Z14_TUNE
def_bool TUNE_Z14 || MARCH_Z14 && TUNE_DEFAULT
choice
prompt "Tune code generation"
default TUNE_DEFAULT
@ -343,6 +358,9 @@ config TUNE_ZEC12
config TUNE_Z13
bool "IBM z13"
config TUNE_Z14
bool "IBM z14"
endchoice
config 64BIT

2
arch/s390/Makefile
View File

@ -32,6 +32,7 @@ mflags-$(CONFIG_MARCH_Z10) := -march=z10
mflags-$(CONFIG_MARCH_Z196) := -march=z196
mflags-$(CONFIG_MARCH_ZEC12) := -march=zEC12
mflags-$(CONFIG_MARCH_Z13) := -march=z13
mflags-$(CONFIG_MARCH_Z14) := -march=z14
export CC_FLAGS_MARCH := $(mflags-y)
@ -45,6 +46,7 @@ cflags-$(CONFIG_MARCH_Z10_TUNE) += -mtune=z10
cflags-$(CONFIG_MARCH_Z196_TUNE) += -mtune=z196
cflags-$(CONFIG_MARCH_ZEC12_TUNE) += -mtune=zEC12
cflags-$(CONFIG_MARCH_Z13_TUNE) += -mtune=z13
cflags-$(CONFIG_MARCH_Z14_TUNE) += -mtune=z14
cflags-y += -Wa,-I$(srctree)/arch/$(ARCH)/include

1
arch/s390/include/asm/Kbuild
View File

@ -16,4 +16,5 @@ generic-y += mcs_spinlock.h
generic-y += mm-arch-hooks.h
generic-y += preempt.h
generic-y += trace_clock.h
generic-y += unaligned.h
generic-y += word-at-a-time.h

7
arch/s390/include/asm/cpcmd.h
View File

@ -10,9 +10,8 @@
/*
* the lowlevel function for cpcmd
* the caller of __cpcmd has to ensure that the response buffer is below 2 GB
*/
extern int __cpcmd(const char *cmd, char *response, int rlen, int *response_code);
int __cpcmd(const char *cmd, char *response, int rlen, int *response_code);
/*
* cpcmd is the in-kernel interface for issuing CP commands
@ -25,8 +24,8 @@ extern int __cpcmd(const char *cmd, char *response, int rlen, int *response_code
* response_code: return pointer for VM's error code
* return value: the size of the response. The caller can check if the buffer
* was large enough by comparing the return value and rlen
* NOTE: If the response buffer is not below 2 GB, cpcmd can sleep
* NOTE: If the response buffer is not in real storage, cpcmd can sleep
*/
extern int cpcmd(const char *cmd, char *response, int rlen, int *response_code);
int cpcmd(const char *cmd, char *response, int rlen, int *response_code);
#endif /* _ASM_S390_CPCMD_H */

4
arch/s390/include/asm/ebcdic.h
View File

@ -9,9 +9,7 @@
#ifndef _EBCDIC_H
#define _EBCDIC_H
#ifndef _S390_TYPES_H
#include <types.h>
#endif
#include <linux/types.h>
extern __u8 _ascebc_500[256]; /* ASCII -> EBCDIC 500 conversion table */
extern __u8 _ebcasc_500[256]; /* EBCDIC 500 -> ASCII conversion table */

2
arch/s390/include/asm/elf.h
View File

@ -191,7 +191,7 @@ struct arch_elf_state {
} while (0)
#define CORE_DUMP_USE_REGSET
#define ELF_EXEC_PAGESIZE 4096
#define ELF_EXEC_PAGESIZE PAGE_SIZE
/*
* This is the base location for PIE (ET_DYN with INTERP) loads. On

2
arch/s390/include/asm/ipl.h
View File

@ -81,7 +81,7 @@ struct ipl_parameter_block {
struct ipl_block_fcp fcp;
struct ipl_block_ccw ccw;
} ipl_info;
} __attribute__((packed,aligned(4096)));
} __packed __aligned(PAGE_SIZE);
/*
* IPL validity flags

48
arch/s390/include/asm/lowcore.h
View File

@ -95,46 +95,46 @@ struct lowcore {
__u64 int_clock; /* 0x0310 */
__u64 mcck_clock; /* 0x0318 */
__u64 clock_comparator; /* 0x0320 */
__u64 boot_clock[2]; /* 0x0328 */
/* Current process. */
__u64 current_task; /* 0x0328 */
__u8 pad_0x318[0x320-0x318]; /* 0x0330 */
__u64 kernel_stack; /* 0x0338 */
__u64 current_task; /* 0x0338 */
__u64 kernel_stack; /* 0x0340 */
/* Interrupt, panic and restart stack. */
__u64 async_stack; /* 0x0340 */
__u64 panic_stack; /* 0x0348 */
__u64 restart_stack; /* 0x0350 */
__u64 async_stack; /* 0x0348 */
__u64 panic_stack; /* 0x0350 */
__u64 restart_stack; /* 0x0358 */
/* Restart function and parameter. */
__u64 restart_fn; /* 0x0358 */
__u64 restart_data; /* 0x0360 */
__u64 restart_source; /* 0x0368 */
__u64 restart_fn; /* 0x0360 */
__u64 restart_data; /* 0x0368 */
__u64 restart_source; /* 0x0370 */
/* Address space pointer. */
__u64 kernel_asce; /* 0x0370 */
__u64 user_asce; /* 0x0378 */
__u64 kernel_asce; /* 0x0378 */
__u64 user_asce; /* 0x0380 */
/*
* The lpp and current_pid fields form a
* 64-bit value that is set as program
* parameter with the LPP instruction.
*/
__u32 lpp; /* 0x0380 */
__u32 current_pid; /* 0x0384 */
__u32 lpp; /* 0x0388 */
__u32 current_pid; /* 0x038c */
/* SMP info area */
__u32 cpu_nr; /* 0x0388 */
__u32 softirq_pending; /* 0x038c */
__u64 percpu_offset; /* 0x0390 */
__u64 vdso_per_cpu_data; /* 0x0398 */
__u64 machine_flags; /* 0x03a0 */
__u32 preempt_count; /* 0x03a8 */
__u8 pad_0x03ac[0x03b0-0x03ac]; /* 0x03ac */
__u64 gmap; /* 0x03b0 */
__u32 spinlock_lockval; /* 0x03b8 */
__u32 fpu_flags; /* 0x03bc */
__u8 pad_0x03c0[0x0400-0x03c0]; /* 0x03c0 */
__u32 cpu_nr; /* 0x0390 */
__u32 softirq_pending; /* 0x0394 */
__u64 percpu_offset; /* 0x0398 */
__u64 vdso_per_cpu_data; /* 0x03a0 */
__u64 machine_flags; /* 0x03a8 */
__u32 preempt_count; /* 0x03b0 */
__u8 pad_0x03b4[0x03b8-0x03b4]; /* 0x03b4 */
__u64 gmap; /* 0x03b8 */
__u32 spinlock_lockval; /* 0x03c0 */
__u32 fpu_flags; /* 0x03c4 */
__u8 pad_0x03c8[0x0400-0x03c8]; /* 0x03c8 */
/* Per cpu primary space access list */
__u32 paste[16]; /* 0x0400 */

11
arch/s390/include/asm/mman.h
View File

@ -1,11 +0,0 @@
/*
* S390 version
*
* Derived from "include/asm-i386/mman.h"
*/
#ifndef __S390_MMAN_H__
#define __S390_MMAN_H__
#include <uapi/asm/mman.h>
#endif /* __S390_MMAN_H__ */

33
arch/s390/include/asm/mmu_context.h
View File

@ -12,6 +12,7 @@
#include <linux/mm_types.h>
#include <asm/tlbflush.h>
#include <asm/ctl_reg.h>
#include <asm-generic/mm_hooks.h>
static inline int init_new_context(struct task_struct *tsk,
struct mm_struct *mm)
@ -33,7 +34,7 @@ static inline int init_new_context(struct task_struct *tsk,
mm->context.use_cmma = 0;
#endif
switch (mm->context.asce_limit) {
case 1UL << 42:
case _REGION2_SIZE:
/*
* forked 3-level task, fall through to set new asce with new
* mm->pgd
@ -49,12 +50,12 @@ static inline int init_new_context(struct task_struct *tsk,
mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | _ASCE_TYPE_REGION1;
break;
case 1UL << 53:
case _REGION1_SIZE:
/* forked 4-level task, set new asce with new mm->pgd */
mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | _ASCE_TYPE_REGION2;
break;
case 1UL << 31:
case _REGION3_SIZE:
/* forked 2-level compat task, set new asce with new mm->pgd */
mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | _ASCE_TYPE_SEGMENT;
@ -138,30 +139,4 @@ static inline void activate_mm(struct mm_struct *prev,
set_user_asce(next);
}
static inline void arch_dup_mmap(struct mm_struct *oldmm,
struct mm_struct *mm)
{
}
static inline void arch_exit_mmap(struct mm_struct *mm)
{
}
static inline void arch_unmap(struct mm_struct *mm,
struct vm_area_struct *vma,
unsigned long start, unsigned long end)
{
}
static inline void arch_bprm_mm_init(struct mm_struct *mm,
struct vm_area_struct *vma)
{
}
static inline bool arch_vma_access_permitted(struct vm_area_struct *vma,
bool write, bool execute, bool foreign)
{
/* by default, allow everything */
return true;
}
#endif /* __S390_MMU_CONTEXT_H */

2
arch/s390/include/asm/nmi.h
View File

@ -72,7 +72,7 @@ union mci {
u64 ar : 1; /* 33 access register validity */
u64 da : 1; /* 34 delayed access exception */
u64 : 1; /* 35 */
u64 gs : 1; /* 36 guarded storage registers */
u64 gs : 1; /* 36 guarded storage registers validity */
u64 : 5; /* 37-41 */
u64 pr : 1; /* 42 tod programmable register validity */
u64 fc : 1; /* 43 fp control register validity */

1
arch/s390/include/asm/page-states.h
View File

@ -13,6 +13,7 @@
#define ESSA_SET_POT_VOLATILE 4
#define ESSA_SET_STABLE_RESIDENT 5
#define ESSA_SET_STABLE_IF_RESIDENT 6
#define ESSA_SET_STABLE_NODAT 7
#define ESSA_MAX ESSA_SET_STABLE_IF_RESIDENT

33
arch/s390/include/asm/page.h
View File

@ -10,10 +10,14 @@
#include <linux/const.h>
#include <asm/types.h>
#define _PAGE_SHIFT 12
#define _PAGE_SIZE (_AC(1, UL) << _PAGE_SHIFT)
#define _PAGE_MASK (~(_PAGE_SIZE - 1))
/* PAGE_SHIFT determines the page size */
#define PAGE_SHIFT 12
#define PAGE_SIZE (_AC(1,UL) << PAGE_SHIFT)
#define PAGE_MASK (~(PAGE_SIZE-1))
#define PAGE_SHIFT _PAGE_SHIFT
#define PAGE_SIZE _PAGE_SIZE
#define PAGE_MASK _PAGE_MASK
#define PAGE_DEFAULT_ACC 0
#define PAGE_DEFAULT_KEY (PAGE_DEFAULT_ACC << 4)
@ -133,6 +137,9 @@ static inline int page_reset_referenced(unsigned long addr)
struct page;
void arch_free_page(struct page *page, int order);
void arch_alloc_page(struct page *page, int order);
void arch_set_page_dat(struct page *page, int order);
void arch_set_page_nodat(struct page *page, int order);
int arch_test_page_nodat(struct page *page);
void arch_set_page_states(int make_stable);
static inline int devmem_is_allowed(unsigned long pfn)
@ -147,14 +154,24 @@ static inline int devmem_is_allowed(unsigned long pfn)
#define __PAGE_OFFSET 0x0UL
#define PAGE_OFFSET 0x0UL
#define __pa(x) (unsigned long)(x)
#define __va(x) (void *)(unsigned long)(x)
#define virt_to_page(kaddr) pfn_to_page(__pa(kaddr) >> PAGE_SHIFT)
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define __pa(x) ((unsigned long)(x))
#define __va(x) ((void *)(unsigned long)(x))
#define virt_to_pfn(kaddr) (__pa(kaddr) >> PAGE_SHIFT)
#define pfn_to_virt(pfn) __va((pfn) << PAGE_SHIFT)
#define virt_to_page(kaddr) pfn_to_page(virt_to_pfn(kaddr))
#define page_to_virt(page) pfn_to_virt(page_to_pfn(page))
#define phys_to_pfn(kaddr) ((kaddr) >> PAGE_SHIFT)
#define pfn_to_phys(pfn) ((pfn) << PAGE_SHIFT)
#define phys_to_page(kaddr) pfn_to_page(phys_to_pfn(kaddr))
#define page_to_phys(page) (page_to_pfn(page) << PAGE_SHIFT)
#define virt_addr_valid(kaddr) pfn_valid(__pa(kaddr) >> PAGE_SHIFT)
#define VM_DATA_DEFAULT_FLAGS (VM_READ | VM_WRITE | \
VM_MAYREAD | VM_MAYWRITE | VM_MAYEXEC)

18
arch/s390/include/asm/pgalloc.h
View File

@ -15,6 +15,8 @@
#include <linux/gfp.h>
#include <linux/mm.h>
#define CRST_ALLOC_ORDER 2
unsigned long *crst_table_alloc(struct mm_struct *);
void crst_table_free(struct mm_struct *, unsigned long *);
@ -42,16 +44,16 @@ static inline void clear_table(unsigned long *s, unsigned long val, size_t n)
static inline void crst_table_init(unsigned long *crst, unsigned long entry)
{
clear_table(crst, entry, sizeof(unsigned long)*2048);
clear_table(crst, entry, _CRST_TABLE_SIZE);
}
static inline unsigned long pgd_entry_type(struct mm_struct *mm)
{
if (mm->context.asce_limit <= (1UL << 31))
if (mm->context.asce_limit <= _REGION3_SIZE)
return _SEGMENT_ENTRY_EMPTY;
if (mm->context.asce_limit <= (1UL << 42))
if (mm->context.asce_limit <= _REGION2_SIZE)
return _REGION3_ENTRY_EMPTY;
if (mm->context.asce_limit <= (1UL << 53))
if (mm->context.asce_limit <= _REGION1_SIZE)
return _REGION2_ENTRY_EMPTY;
return _REGION1_ENTRY_EMPTY;
}
@ -119,7 +121,7 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
if (!table)
return NULL;
if (mm->context.asce_limit == (1UL << 31)) {
if (mm->context.asce_limit == _REGION3_SIZE) {
/* Forking a compat process with 2 page table levels */
if (!pgtable_pmd_page_ctor(virt_to_page(table))) {
crst_table_free(mm, table);
@ -131,7 +133,7 @@ static inline pgd_t *pgd_alloc(struct mm_struct *mm)
static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
{
if (mm->context.asce_limit == (1UL << 31))
if (mm->context.asce_limit == _REGION3_SIZE)
pgtable_pmd_page_dtor(virt_to_page(pgd));
crst_table_free(mm, (unsigned long *) pgd);
}
@ -158,4 +160,8 @@ static inline void pmd_populate(struct mm_struct *mm,
extern void rcu_table_freelist_finish(void);
void vmem_map_init(void);
void *vmem_crst_alloc(unsigned long val);
pte_t *vmem_pte_alloc(void);
#endif /* _S390_PGALLOC_H */

169
arch/s390/include/asm/pgtable.h
View File

@ -11,19 +11,6 @@
#ifndef _ASM_S390_PGTABLE_H
#define _ASM_S390_PGTABLE_H
/*
* The Linux memory management assumes a three-level page table setup.
* For s390 64 bit we use up to four of the five levels the hardware
* provides (region first tables are not used).
*
* The "pgd_xxx()" functions are trivial for a folded two-level
* setup: the pgd is never bad, and a pmd always exists (as it's folded
* into the pgd entry)
*
* This file contains the functions and defines necessary to modify and use
* the S390 page table tree.
*/
#ifndef __ASSEMBLY__
#include <linux/sched.h>
#include <linux/mm_types.h>
#include <linux/page-flags.h>
@ -34,9 +21,6 @@
extern pgd_t swapper_pg_dir[];
extern void paging_init(void);
extern void vmem_map_init(void);
pmd_t *vmem_pmd_alloc(void);
pte_t *vmem_pte_alloc(void);
enum {
PG_DIRECT_MAP_4K = 0,
@ -77,38 +61,6 @@ extern unsigned long zero_page_mask;
#define __HAVE_COLOR_ZERO_PAGE
/* TODO: s390 cannot support io_remap_pfn_range... */
#endif /* !__ASSEMBLY__ */
/*
* PMD_SHIFT determines the size of the area a second-level page
* table can map
* PGDIR_SHIFT determines what a third-level page table entry can map
*/
#define PMD_SHIFT 20
#define PUD_SHIFT 31
#define P4D_SHIFT 42
#define PGDIR_SHIFT 53
#define PMD_SIZE (1UL << PMD_SHIFT)
#define PMD_MASK (~(PMD_SIZE-1))
#define PUD_SIZE (1UL << PUD_SHIFT)
#define PUD_MASK (~(PUD_SIZE-1))
#define P4D_SIZE (1UL << P4D_SHIFT)
#define P4D_MASK (~(P4D_SIZE-1))
#define PGDIR_SIZE (1UL << PGDIR_SHIFT)
#define PGDIR_MASK (~(PGDIR_SIZE-1))
/*
* entries per page directory level: the S390 is two-level, so
* we don't really have any PMD directory physically.
* for S390 segment-table entries are combined to one PGD
* that leads to 1024 pte per pgd
*/
#define PTRS_PER_PTE 256
#define PTRS_PER_PMD 2048
#define PTRS_PER_PUD 2048
#define PTRS_PER_P4D 2048
#define PTRS_PER_PGD 2048
#define FIRST_USER_ADDRESS 0UL
@ -123,7 +75,6 @@ extern unsigned long zero_page_mask;
#define pgd_ERROR(e) \
printk("%s:%d: bad pgd %p.\n", __FILE__, __LINE__, (void *) pgd_val(e))
#ifndef __ASSEMBLY__
/*
* The vmalloc and module area will always be on the topmost area of the
* kernel mapping. We reserve 128GB (64bit) for vmalloc and modules.
@ -269,7 +220,7 @@ static inline int is_module_addr(void *addr)
*/
/* Bits in the segment/region table address-space-control-element */
#define _ASCE_ORIGIN ~0xfffUL/* segment table origin */
#define _ASCE_ORIGIN ~0xfffUL/* region/segment table origin */
#define _ASCE_PRIVATE_SPACE 0x100 /* private space control */
#define _ASCE_ALT_EVENT 0x80 /* storage alteration event control */
#define _ASCE_SPACE_SWITCH 0x40 /* space switch event */
@ -320,9 +271,9 @@ static inline int is_module_addr(void *addr)
#define _SEGMENT_ENTRY_BITS 0xfffffffffffffe33UL
#define _SEGMENT_ENTRY_BITS_LARGE 0xfffffffffff0ff33UL
#define _SEGMENT_ENTRY_ORIGIN_LARGE ~0xfffffUL /* large page address */
#define _SEGMENT_ENTRY_ORIGIN ~0x7ffUL/* segment table origin */
#define _SEGMENT_ENTRY_PROTECT 0x200 /* page protection bit */
#define _SEGMENT_ENTRY_NOEXEC 0x100 /* region no-execute bit */
#define _SEGMENT_ENTRY_ORIGIN ~0x7ffUL/* page table origin */
#define _SEGMENT_ENTRY_PROTECT 0x200 /* segment protection bit */
#define _SEGMENT_ENTRY_NOEXEC 0x100 /* segment no-execute bit */
#define _SEGMENT_ENTRY_INVALID 0x20 /* invalid segment table entry */
#define _SEGMENT_ENTRY (0)
@ -340,6 +291,54 @@ static inline int is_module_addr(void *addr)
#define _SEGMENT_ENTRY_SOFT_DIRTY 0x0000 /* SW segment soft dirty bit */
#endif
#define _CRST_ENTRIES 2048 /* number of region/segment table entries */
#define _PAGE_ENTRIES 256 /* number of page table entries */
#define _CRST_TABLE_SIZE (_CRST_ENTRIES * 8)
#define _PAGE_TABLE_SIZE (_PAGE_ENTRIES * 8)
#define _REGION1_SHIFT 53
#define _REGION2_SHIFT 42
#define _REGION3_SHIFT 31
#define _SEGMENT_SHIFT 20
#define _REGION1_INDEX (0x7ffUL << _REGION1_SHIFT)
#define _REGION2_INDEX (0x7ffUL << _REGION2_SHIFT)
#define _REGION3_INDEX (0x7ffUL << _REGION3_SHIFT)
#define _SEGMENT_INDEX (0x7ffUL << _SEGMENT_SHIFT)
#define _PAGE_INDEX (0xffUL << _PAGE_SHIFT)
#define _REGION1_SIZE (1UL << _REGION1_SHIFT)
#define _REGION2_SIZE (1UL << _REGION2_SHIFT)
#define _REGION3_SIZE (1UL << _REGION3_SHIFT)
#define _SEGMENT_SIZE (1UL << _SEGMENT_SHIFT)
#define _REGION1_MASK (~(_REGION1_SIZE - 1))
#define _REGION2_MASK (~(_REGION2_SIZE - 1))
#define _REGION3_MASK (~(_REGION3_SIZE - 1))
#define _SEGMENT_MASK (~(_SEGMENT_SIZE - 1))
#define PMD_SHIFT _SEGMENT_SHIFT
#define PUD_SHIFT _REGION3_SHIFT
#define P4D_SHIFT _REGION2_SHIFT
#define PGDIR_SHIFT _REGION1_SHIFT
#define PMD_SIZE _SEGMENT_SIZE
#define PUD_SIZE _REGION3_SIZE
#define P4D_SIZE _REGION2_SIZE
#define PGDIR_SIZE _REGION1_SIZE
#define PMD_MASK _SEGMENT_MASK
#define PUD_MASK _REGION3_MASK
#define P4D_MASK _REGION2_MASK
#define PGDIR_MASK _REGION1_MASK
#define PTRS_PER_PTE _PAGE_ENTRIES
#define PTRS_PER_PMD _CRST_ENTRIES
#define PTRS_PER_PUD _CRST_ENTRIES
#define PTRS_PER_P4D _CRST_ENTRIES
#define PTRS_PER_PGD _CRST_ENTRIES
/*
* Segment table and region3 table entry encoding
* (R = read-only, I = invalid, y = young bit):
@ -376,6 +375,7 @@ static inline int is_module_addr(void *addr)
/* Guest Page State used for virtualization */
#define _PGSTE_GPS_ZERO 0x0000000080000000UL
#define _PGSTE_GPS_NODAT 0x0000000040000000UL
#define _PGSTE_GPS_USAGE_MASK 0x0000000003000000UL
#define _PGSTE_GPS_USAGE_STABLE 0x0000000000000000UL
#define _PGSTE_GPS_USAGE_UNUSED 0x0000000001000000UL
@ -505,7 +505,7 @@ static inline int mm_alloc_pgste(struct mm_struct *mm)
* In the case that a guest uses storage keys
* faults should no longer be backed by zero pages
*/
#define mm_forbids_zeropage mm_use_skey
#define mm_forbids_zeropage mm_has_pgste
static inline int mm_use_skey(struct mm_struct *mm)
{
#ifdef CONFIG_PGSTE
@ -952,15 +952,30 @@ static inline pte_t pte_mkhuge(pte_t pte)
#define IPTE_GLOBAL 0
#define IPTE_LOCAL 1
static inline void __ptep_ipte(unsigned long address, pte_t *ptep, int local)
#define IPTE_NODAT 0x400
#define IPTE_GUEST_ASCE 0x800
static inline void __ptep_ipte(unsigned long address, pte_t *ptep,
unsigned long opt, unsigned long asce,
int local)
{
unsigned long pto = (unsigned long) ptep;
if (__builtin_constant_p(opt) && opt == 0) {
/* Invalidation + TLB flush for the pte */
asm volatile(
" .insn rrf,0xb2210000,%[r1],%[r2],0,%[m4]"
: "+m" (*ptep) : [r1] "a" (pto), [r2] "a" (address),
[m4] "i" (local));
return;
}
/* Invalidate ptes with options + TLB flush of the ptes */
opt = opt | (asce & _ASCE_ORIGIN);
asm volatile(
" .insn rrf,0xb2210000,%[r1],%[r2],%[r3],%[m4]"
: [r2] "+a" (address), [r3] "+a" (opt)
: [r1] "a" (pto), [m4] "i" (local) : "memory");
}
static inline void __ptep_ipte_range(unsigned long address, int nr,
@ -1341,31 +1356,61 @@ static inline void __pmdp_csp(pmd_t *pmdp)
#define IDTE_GLOBAL 0
#define IDTE_LOCAL 1
static inline void __pmdp_idte(unsigned long address, pmd_t *pmdp, int local)
#define IDTE_PTOA 0x0800
#define IDTE_NODAT 0x1000
#define IDTE_GUEST_ASCE 0x2000
static inline void __pmdp_idte(unsigned long addr, pmd_t *pmdp,
unsigned long opt, unsigned long asce,
int local)
{
unsigned long sto;
sto = (unsigned long) pmdp - pmd_index(address) * sizeof(pmd_t);
sto = (unsigned long) pmdp - pmd_index(addr) * sizeof(pmd_t);
if (__builtin_constant_p(opt) && opt == 0) {
/* flush without guest asce */
asm volatile(
" .insn rrf,0xb98e0000,%[r1],%[r2],0,%[m4]"
: "+m" (*pmdp)
: [r1] "a" (sto), [r2] "a" ((address & HPAGE_MASK)),
: [r1] "a" (sto), [r2] "a" ((addr & HPAGE_MASK)),
[m4] "i" (local)
: "cc" );
} else {
/* flush with guest asce */
asm volatile(
" .insn rrf,0xb98e0000,%[r1],%[r2],%[r3],%[m4]"
: "+m" (*pmdp)
: [r1] "a" (sto), [r2] "a" ((addr & HPAGE_MASK) | opt),
[r3] "a" (asce), [m4] "i" (local)
: "cc" );
}
}
static inline void __pudp_idte(unsigned long address, pud_t *pudp, int local)
static inline void __pudp_idte(unsigned long addr, pud_t *pudp,
unsigned long opt, unsigned long asce,
int local)
{
unsigned long r3o;
r3o = (unsigned long) pudp - pud_index(address) * sizeof(pud_t);
r3o = (unsigned long) pudp - pud_index(addr) * sizeof(pud_t);
r3o |= _ASCE_TYPE_REGION3;
if (__builtin_constant_p(opt) && opt == 0) {
/* flush without guest asce */
asm volatile(
" .insn rrf,0xb98e0000,%[r1],%[r2],0,%[m4]"
: "+m" (*pudp)
: [r1] "a" (r3o), [r2] "a" ((address & PUD_MASK)),
: [r1] "a" (r3o), [r2] "a" ((addr & PUD_MASK)),
[m4] "i" (local)
: "cc");
} else {
/* flush with guest asce */
asm volatile(
" .insn rrf,0xb98e0000,%[r1],%[r2],%[r3],%[m4]"
: "+m" (*pudp)
: [r1] "a" (r3o), [r2] "a" ((addr & PUD_MASK) | opt),
[r3] "a" (asce), [m4] "i" (local)
: "cc" );
}
}
pmd_t pmdp_xchg_direct(struct mm_struct *, unsigned long, pmd_t *, pmd_t);
@ -1548,8 +1593,6 @@ static inline swp_entry_t __swp_entry(unsigned long type, unsigned long offset)
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
#endif /* !__ASSEMBLY__ */
#define kern_addr_valid(addr) (1)
extern int vmem_add_mapping(unsigned long start, unsigned long size);

2
arch/s390/include/asm/qdio.h
View File

@ -80,7 +80,7 @@ struct qdr {
u32 qkey : 4;
u32 : 28;
struct qdesfmt0 qdf0[126];
} __attribute__ ((packed, aligned(4096)));
} __packed __aligned(PAGE_SIZE);
#define QIB_AC_OUTBOUND_PCI_SUPPORTED 0x40
#define QIB_RFLAGS_ENABLE_QEBSM 0x80

17
arch/s390/include/asm/setup.h
View File

@ -29,8 +29,10 @@
#define MACHINE_FLAG_TE _BITUL(11)
#define MACHINE_FLAG_TLB_LC _BITUL(12)
#define MACHINE_FLAG_VX _BITUL(13)
#define MACHINE_FLAG_NX _BITUL(14)
#define MACHINE_FLAG_GS _BITUL(15)
#define MACHINE_FLAG_TLB_GUEST _BITUL(14)
#define MACHINE_FLAG_NX _BITUL(15)
#define MACHINE_FLAG_GS _BITUL(16)
#define MACHINE_FLAG_SCC _BITUL(17)
#define LPP_MAGIC _BITUL(31)
#define LPP_PFAULT_PID_MASK _AC(0xffffffff, UL)
@ -68,8 +70,10 @@ extern void detect_memory_memblock(void);
#define MACHINE_HAS_TE (S390_lowcore.machine_flags & MACHINE_FLAG_TE)
#define MACHINE_HAS_TLB_LC (S390_lowcore.machine_flags & MACHINE_FLAG_TLB_LC)
#define MACHINE_HAS_VX (S390_lowcore.machine_flags & MACHINE_FLAG_VX)
#define MACHINE_HAS_TLB_GUEST (S390_lowcore.machine_flags & MACHINE_FLAG_TLB_GUEST)
#define MACHINE_HAS_NX (S390_lowcore.machine_flags & MACHINE_FLAG_NX)
#define MACHINE_HAS_GS (S390_lowcore.machine_flags & MACHINE_FLAG_GS)
#define MACHINE_HAS_SCC (S390_lowcore.machine_flags & MACHINE_FLAG_SCC)
/*
* Console mode. Override with conmode=
@ -104,9 +108,16 @@ extern void pfault_fini(void);
#define pfault_fini() do { } while (0)
#endif /* CONFIG_PFAULT */
#ifdef CONFIG_VMCP
void vmcp_cma_reserve(void);
#else
static inline void vmcp_cma_reserve(void) { }
#endif
void report_user_fault(struct pt_regs *regs, long signr, int is_mm_fault);
extern void cmma_init(void);
void cmma_init(void);
void cmma_init_nodat(void);
extern void (*_machine_restart)(char *command);
extern void (*_machine_halt)(void);

9
arch/s390/include/asm/spinlock.h
View File

@ -92,10 +92,11 @@ static inline void arch_spin_unlock(arch_spinlock_t *lp)
{
typecheck(int, lp->lock);
asm volatile(
"st %1,%0\n"
: "+Q" (lp->lock)
: "d" (0)
: "cc", "memory");
#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
" .long 0xb2fa0070\n" /* NIAI 7 */
#endif
" st %1,%0\n"
: "=Q" (lp->lock) : "d" (0) : "cc", "memory");
}
/*

40
arch/s390/include/asm/timex.h
View File

@ -15,6 +15,8 @@
/* The value of the TOD clock for 1.1.1970. */
#define TOD_UNIX_EPOCH 0x7d91048bca000000ULL
extern u64 clock_comparator_max;
/* Inline functions for clock register access. */
static inline int set_tod_clock(__u64 time)
{
@ -126,7 +128,7 @@ static inline unsigned long long local_tick_disable(void)
unsigned long long old;
old = S390_lowcore.clock_comparator;
S390_lowcore.clock_comparator = -1ULL;
S390_lowcore.clock_comparator = clock_comparator_max;
set_clock_comparator(S390_lowcore.clock_comparator);
return old;
}
@ -174,24 +176,24 @@ static inline cycles_t get_cycles(void)
return (cycles_t) get_tod_clock() >> 2;
}
int get_phys_clock(unsigned long long *clock);
int get_phys_clock(unsigned long *clock);
void init_cpu_timer(void);
unsigned long long monotonic_clock(void);
extern u64 sched_clock_base_cc;
extern unsigned char tod_clock_base[16] __aligned(8);
/**
* get_clock_monotonic - returns current time in clock rate units
*
* The caller must ensure that preemption is disabled.
* The clock and sched_clock_base get changed via stop_machine.
* The clock and tod_clock_base get changed via stop_machine.
* Therefore preemption must be disabled when calling this
* function, otherwise the returned value is not guaranteed to
* be monotonic.
*/
static inline unsigned long long get_tod_clock_monotonic(void)
{
return get_tod_clock() - sched_clock_base_cc;
return get_tod_clock() - *(unsigned long long *) &tod_clock_base[1];
}
/**
@ -218,4 +220,32 @@ static inline unsigned long long tod_to_ns(unsigned long long todval)
return ((todval >> 9) * 125) + (((todval & 0x1ff) * 125) >> 9);
}
/**
* tod_after - compare two 64 bit TOD values
* @a: first 64 bit TOD timestamp
* @b: second 64 bit TOD timestamp
*
* Returns: true if a is later than b
*/
static inline int tod_after(unsigned long long a, unsigned long long b)
{
if (MACHINE_HAS_SCC)
return (long long) a > (long long) b;
return a > b;
}
/**
* tod_after_eq - compare two 64 bit TOD values
* @a: first 64 bit TOD timestamp
* @b: second 64 bit TOD timestamp
*
* Returns: true if a is later than b
*/
static inline int tod_after_eq(unsigned long long a, unsigned long long b)
{
if (MACHINE_HAS_SCC)
return (long long) a >= (long long) b;
return a >= b;
}
#endif

6
arch/s390/include/asm/tlb.h
View File

@ -135,7 +135,7 @@ static inline void pte_free_tlb(struct mmu_gather *tlb, pgtable_t pte,
static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
unsigned long address)
{
if (tlb->mm->context.asce_limit <= (1UL << 31))
if (tlb->mm->context.asce_limit <= _REGION3_SIZE)
return;
pgtable_pmd_page_dtor(virt_to_page(pmd));
tlb_remove_table(tlb, pmd);
@ -151,7 +151,7 @@ static inline void pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd,
static inline void p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
unsigned long address)
{
if (tlb->mm->context.asce_limit <= (1UL << 53))
if (tlb->mm->context.asce_limit <= _REGION1_SIZE)
return;
tlb_remove_table(tlb, p4d);
}
@ -166,7 +166,7 @@ static inline void p4d_free_tlb(struct mmu_gather *tlb, p4d_t *p4d,
static inline void pud_free_tlb(struct mmu_gather *tlb, pud_t *pud,
unsigned long address)
{
if (tlb->mm->context.asce_limit <= (1UL << 42))
if (tlb->mm->context.asce_limit <= _REGION2_SIZE)
return;
tlb_remove_table(tlb, pud);
}

7
arch/s390/include/asm/tlbflush.h
View File

@ -20,10 +20,15 @@ static inline void __tlb_flush_local(void)
*/
static inline void __tlb_flush_idte(unsigned long asce)
{
unsigned long opt;
opt = IDTE_PTOA;
if (MACHINE_HAS_TLB_GUEST)
opt |= IDTE_GUEST_ASCE;
/* Global TLB flush for the mm */
asm volatile(
" .insn rrf,0xb98e0000,0,%0,%1,0"
: : "a" (2048), "a" (asce) : "cc");
: : "a" (opt), "a" (asce) : "cc");
}
#ifdef CONFIG_SMP

6
arch/s390/include/asm/topology.h
View File

@ -77,12 +77,6 @@ static inline const struct cpumask *cpumask_of_node(int node)
return &node_to_cpumask_map[node];
}
/*
* Returns the number of the node containing node 'node'. This
* architecture is flat, so it is a pretty simple function!
*/
#define parent_node(node) (node)
#define pcibus_to_node(bus) __pcibus_to_node(bus)
#define node_distance(a, b) __node_distance(a, b)

11
arch/s390/include/asm/types.h
View File

@ -1,11 +0,0 @@
/*
* S390 version
*
* Derived from "include/asm-i386/types.h"
*/
#ifndef _S390_TYPES_H
#define _S390_TYPES_H
#include <uapi/asm/types.h>
#endif /* _S390_TYPES_H */

13
arch/s390/include/asm/unaligned.h
View File

@ -1,13 +0,0 @@
#ifndef _ASM_S390_UNALIGNED_H
#define _ASM_S390_UNALIGNED_H
/*
* The S390 can do unaligned accesses itself.
*/
#include <linux/unaligned/access_ok.h>
#include <linux/unaligned/generic.h>
#define get_unaligned __get_unaligned_be
#define put_unaligned __put_unaligned_be
#endif /* _ASM_S390_UNALIGNED_H */

1
arch/s390/include/uapi/asm/Kbuild
View File

@ -9,4 +9,5 @@ generic-y += param.h
generic-y += poll.h
generic-y += resource.h
generic-y += sockios.h
generic-y += swab.h
generic-y += termbits.h

6
arch/s390/include/uapi/asm/dasd.h
View File

@ -72,7 +72,10 @@ typedef struct dasd_information2_t {
* 0x02: use diag discipline (diag)
* 0x04: set the device initially online (internal use only)
* 0x08: enable ERP related logging
* 0x20: give access to raw eckd data
* 0x10: allow I/O to fail on lost paths
* 0x20: allow I/O to fail when a lock was stolen
* 0x40: give access to raw eckd data
* 0x80: enable discard support
*/
#define DASD_FEATURE_DEFAULT 0x00
#define DASD_FEATURE_READONLY 0x01
@ -82,6 +85,7 @@ typedef struct dasd_information2_t {
#define DASD_FEATURE_FAILFAST 0x10
#define DASD_FEATURE_FAILONSLCK 0x20
#define DASD_FEATURE_USERAW 0x40
#define DASD_FEATURE_DISCARD 0x80
#define DASD_PARTN_BITS 2

89
arch/s390/include/uapi/asm/swab.h
View File

@ -1,89 +0,0 @@
#ifndef _S390_SWAB_H
#define _S390_SWAB_H
/*
* S390 version
* Copyright IBM Corp. 1999
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com)
*/
#include <linux/types.h>
#ifndef __s390x__
# define __SWAB_64_THRU_32__
#endif
#ifdef __s390x__
static inline __u64 __arch_swab64p(const __u64 *x)
{
__u64 result;
asm volatile("lrvg %0,%1" : "=d" (result) : "m" (*x));
return result;
}
#define __arch_swab64p __arch_swab64p
static inline __u64 __arch_swab64(__u64 x)
{
__u64 result;
asm volatile("lrvgr %0,%1" : "=d" (result) : "d" (x));
return result;
}
#define __arch_swab64 __arch_swab64
static inline void __arch_swab64s(__u64 *x)
{
*x = __arch_swab64p(x);
}
#define __arch_swab64s __arch_swab64s
#endif /* __s390x__ */
static inline __u32 __arch_swab32p(const __u32 *x)
{
__u32 result;
asm volatile(
#ifndef __s390x__
" icm %0,8,%O1+3(%R1)\n"
" icm %0,4,%O1+2(%R1)\n"
" icm %0,2,%O1+1(%R1)\n"
" ic %0,%1"
: "=&d" (result) : "Q" (*x) : "cc");
#else /* __s390x__ */
" lrv %0,%1"
: "=d" (result) : "m" (*x));
#endif /* __s390x__ */
return result;
}
#define __arch_swab32p __arch_swab32p
#ifdef __s390x__
static inline __u32 __arch_swab32(__u32 x)
{
__u32 result;
asm volatile("lrvr %0,%1" : "=d" (result) : "d" (x));
return result;
}
#define __arch_swab32 __arch_swab32
#endif /* __s390x__ */
static inline __u16 __arch_swab16p(const __u16 *x)
{
__u16 result;
asm volatile(
#ifndef __s390x__
" icm %0,2,%O1+1(%R1)\n"
" ic %0,%1\n"
: "=&d" (result) : "Q" (*x) : "cc");
#else /* __s390x__ */
" lrvh %0,%1"
: "=d" (result) : "m" (*x));
#endif /* __s390x__ */
return result;
}
#define __arch_swab16p __arch_swab16p
#endif /* _S390_SWAB_H */

14
drivers/s390/char/vmcp.h → arch/s390/include/uapi/asm/vmcp.h
View File

@ -12,19 +12,13 @@
* The idea of this driver is based on cpint from Neale Ferguson
*/
#ifndef _UAPI_ASM_VMCP_H
#define _UAPI_ASM_VMCP_H
#include <linux/ioctl.h>
#include <linux/mutex.h>
#define VMCP_GETCODE _IOR(0x10, 1, int)
#define VMCP_SETBUF _IOW(0x10, 2, int)
#define VMCP_GETSIZE _IOR(0x10, 3, int)
struct vmcp_session {
unsigned int bufsize;
char *response;
int resp_size;
int resp_code;
/* As we use copy_from/to_user, which might *
* sleep and cannot use a spinlock */
struct mutex mutex;
};
#endif /* _UAPI_ASM_VMCP_H */

1
arch/s390/kernel/asm-offsets.c
View File

@ -158,6 +158,7 @@ int main(void)
OFFSET(__LC_LAST_UPDATE_CLOCK, lowcore, last_update_clock);
OFFSET(__LC_INT_CLOCK, lowcore, int_clock);
OFFSET(__LC_MCCK_CLOCK, lowcore, mcck_clock);
OFFSET(__LC_BOOT_CLOCK, lowcore, boot_clock);
OFFSET(__LC_CURRENT, lowcore, current_task);
OFFSET(__LC_KERNEL_STACK, lowcore, kernel_stack);
OFFSET(__LC_ASYNC_STACK, lowcore, async_stack);

13
arch/s390/kernel/cpcmd.c
View File

@ -14,6 +14,7 @@
#include <linux/spinlock.h>
#include <linux/stddef.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <asm/diag.h>
#include <asm/ebcdic.h>
#include <asm/cpcmd.h>
@ -28,9 +29,7 @@ static int diag8_noresponse(int cmdlen)
register unsigned long reg3 asm ("3") = cmdlen;
asm volatile(
" sam31\n"
" diag %1,%0,0x8\n"
" sam64\n"
: "+d" (reg3) : "d" (reg2) : "cc");
return reg3;
}
@ -43,9 +42,7 @@ static int diag8_response(int cmdlen, char *response, int *rlen)
register unsigned long reg5 asm ("5") = *rlen;
asm volatile(
" sam31\n"
" diag %2,%0,0x8\n"
" sam64\n"
" brc 8,1f\n"
" agr %1,%4\n"
"1:\n"
@ -57,7 +54,6 @@ static int diag8_response(int cmdlen, char *response, int *rlen)
/*
* __cpcmd has some restrictions over cpcmd
* - the response buffer must reside below 2GB (if any)
* - __cpcmd is unlocked and therefore not SMP-safe
*/
int __cpcmd(const char *cmd, char *response, int rlen, int *response_code)
@ -88,13 +84,12 @@ EXPORT_SYMBOL(__cpcmd);
int cpcmd(const char *cmd, char *response, int rlen, int *response_code)
{
unsigned long flags;
char *lowbuf;
int len;
unsigned long flags;
if ((virt_to_phys(response) != (unsigned long) response) ||
(((unsigned long)response + rlen) >> 31)) {
lowbuf = kmalloc(rlen, GFP_KERNEL | GFP_DMA);
if (is_vmalloc_or_module_addr(response)) {
lowbuf = kmalloc(rlen, GFP_KERNEL);
if (!lowbuf) {
pr_warn("The cpcmd kernel function failed to allocate a response buffer\n");
return -ENOMEM;

9
arch/s390/kernel/debug.c
View File

@ -866,7 +866,8 @@ static inline void
debug_finish_entry(debug_info_t * id, debug_entry_t* active, int level,
int exception)
{
active->id.stck = get_tod_clock_fast() - sched_clock_base_cc;
active->id.stck = get_tod_clock_fast() -
*(unsigned long long *) &tod_clock_base[1];
active->id.fields.cpuid = smp_processor_id();
active->caller = __builtin_return_address(0);
active->id.fields.exception = exception;
@ -1455,15 +1456,15 @@ int
debug_dflt_header_fn(debug_info_t * id, struct debug_view *view,
int area, debug_entry_t * entry, char *out_buf)
{
unsigned long sec, usec;
unsigned long base, sec, usec;
char *except_str;
unsigned long caller;
int rc = 0;
unsigned int level;
level = entry->id.fields.level;
sec = (entry->id.stck >> 12) + (sched_clock_base_cc >> 12);
sec = sec - (TOD_UNIX_EPOCH >> 12);
base = (*(unsigned long *) &tod_clock_base[0]) >> 4;
sec = (entry->id.stck >> 12) + base - (TOD_UNIX_EPOCH >> 12);
usec = do_div(sec, USEC_PER_SEC);
if (entry->id.fields.exception)

2
arch/s390/kernel/dumpstack.c
View File

@ -76,7 +76,7 @@ void dump_trace(dump_trace_func_t func, void *data, struct task_struct *task,
frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
#ifdef CONFIG_CHECK_STACK
sp = __dump_trace(func, data, sp,
S390_lowcore.panic_stack + frame_size - 4096,
S390_lowcore.panic_stack + frame_size - PAGE_SIZE,
S390_lowcore.panic_stack + frame_size);
#endif
sp = __dump_trace(func, data, sp,

17
arch/s390/kernel/early.c
View File

@ -53,8 +53,9 @@ static void __init reset_tod_clock(void)
if (set_tod_clock(TOD_UNIX_EPOCH) != 0 || store_tod_clock(&time) != 0)
disabled_wait(0);
sched_clock_base_cc = TOD_UNIX_EPOCH;
S390_lowcore.last_update_clock = sched_clock_base_cc;
memset(tod_clock_base, 0, 16);
*(__u64 *) &tod_clock_base[1] = TOD_UNIX_EPOCH;
S390_lowcore.last_update_clock = TOD_UNIX_EPOCH;
}
#ifdef CONFIG_SHARED_KERNEL
@ -165,8 +166,8 @@ static noinline __init void create_kernel_nss(void)
}
/* re-initialize cputime accounting. */
sched_clock_base_cc = get_tod_clock();
S390_lowcore.last_update_clock = sched_clock_base_cc;
get_tod_clock_ext(tod_clock_base);
S390_lowcore.last_update_clock = *(__u64 *) &tod_clock_base[1];
S390_lowcore.last_update_timer = 0x7fffffffffffffffULL;
S390_lowcore.user_timer = 0;
S390_lowcore.system_timer = 0;
@ -387,6 +388,12 @@ static __init void detect_machine_facilities(void)
}
if (test_facility(133))
S390_lowcore.machine_flags |= MACHINE_FLAG_GS;
if (test_facility(139) && (tod_clock_base[1] & 0x80)) {
/* Enabled signed clock comparator comparisons */
S390_lowcore.machine_flags |= MACHINE_FLAG_SCC;
clock_comparator_max = -1ULL >> 1;
__ctl_set_bit(0, 53);
}
}
static inline void save_vector_registers(void)
@ -413,7 +420,7 @@ static int __init disable_vector_extension(char *str)
{
S390_lowcore.machine_flags &= ~MACHINE_FLAG_VX;
__ctl_clear_bit(0, 17);
return 1;
return 0;
}
early_param("novx", disable_vector_extension);

3
arch/s390/kernel/head.S
View File

@ -302,7 +302,8 @@ ENTRY(startup_kdump)
xc 0xe00(256),0xe00
xc 0xf00(256),0xf00
lctlg %c0,%c15,0x200(%r0) # initialize control registers
stck __LC_LAST_UPDATE_CLOCK
stcke __LC_BOOT_CLOCK
mvc __LC_LAST_UPDATE_CLOCK(8),__LC_BOOT_CLOCK+1
spt 6f-.LPG0(%r13)
mvc __LC_LAST_UPDATE_TIMER(8),6f-.LPG0(%r13)
l %r15,.Lstack-.LPG0(%r13)

4
arch/s390/kernel/head64.S
View File

@ -21,8 +21,8 @@ ENTRY(startup_continue)
xc __LC_LPP+1(7,0),__LC_LPP+1 # clear lpp and current_pid
mvi __LC_LPP,0x80 # and set LPP_MAGIC
.insn s,0xb2800000,__LC_LPP # load program parameter
0: larl %r1,sched_clock_base_cc
mvc 0(8,%r1),__LC_LAST_UPDATE_CLOCK
0: larl %r1,tod_clock_base
mvc 0(16,%r1),__LC_BOOT_CLOCK
larl %r13,.LPG1 # get base
lctlg %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
lg %r12,.Lparmaddr-.LPG1(%r13) # pointer to parameter area

3
arch/s390/kernel/irq.c
View File

@ -105,7 +105,8 @@ void do_IRQ(struct pt_regs *regs, int irq)
old_regs = set_irq_regs(regs);
irq_enter();
if (S390_lowcore.int_clock >= S390_lowcore.clock_comparator)
if (tod_after_eq(S390_lowcore.int_clock,
S390_lowcore.clock_comparator))
/* Serve timer interrupts first. */
clock_comparator_work();
generic_handle_irq(irq);

5
arch/s390/kernel/relocate_kernel.S
View File

@ -7,6 +7,7 @@
*/
#include <linux/linkage.h>
#include <asm/page.h>
#include <asm/sigp.h>
/*
@ -55,8 +56,8 @@ ENTRY(relocate_kernel)
.back_pgm:
lmg %r0,%r15,gprregs-.base(%r13)
.top:
lghi %r7,4096 # load PAGE_SIZE in r7
lghi %r9,4096 # load PAGE_SIZE in r9
lghi %r7,PAGE_SIZE # load PAGE_SIZE in r7
lghi %r9,PAGE_SIZE # load PAGE_SIZE in r9
lg %r5,0(%r2) # read another word for indirection page
aghi %r2,8 # increment pointer
tml %r5,0x1 # is it a destination page?

14
arch/s390/kernel/setup.c
View File

@ -305,7 +305,7 @@ static void __init setup_lowcore(void)
/*
* Setup lowcore for boot cpu
*/
BUILD_BUG_ON(sizeof(struct lowcore) != LC_PAGES * 4096);
BUILD_BUG_ON(sizeof(struct lowcore) != LC_PAGES * PAGE_SIZE);
lc = memblock_virt_alloc_low(sizeof(*lc), sizeof(*lc));
lc->restart_psw.mask = PSW_KERNEL_BITS;
lc->restart_psw.addr = (unsigned long) restart_int_handler;
@ -323,7 +323,7 @@ static void __init setup_lowcore(void)
lc->io_new_psw.mask = PSW_KERNEL_BITS |
PSW_MASK_DAT | PSW_MASK_MCHECK;
lc->io_new_psw.addr = (unsigned long) io_int_handler;
lc->clock_comparator = -1ULL;
lc->clock_comparator = clock_comparator_max;
lc->kernel_stack = ((unsigned long) &init_thread_union)
+ THREAD_SIZE - STACK_FRAME_OVERHEAD - sizeof(struct pt_regs);
lc->async_stack = (unsigned long)
@ -469,10 +469,10 @@ static void __init setup_memory_end(void)
vmalloc_size = VMALLOC_END ?: (128UL << 30) - MODULES_LEN;
tmp = (memory_end ?: max_physmem_end) / PAGE_SIZE;
tmp = tmp * (sizeof(struct page) + PAGE_SIZE);
if (tmp + vmalloc_size + MODULES_LEN <= (1UL << 42))
vmax = 1UL << 42; /* 3-level kernel page table */
if (tmp + vmalloc_size + MODULES_LEN <= _REGION2_SIZE)
vmax = _REGION2_SIZE; /* 3-level kernel page table */
else
vmax = 1UL << 53; /* 4-level kernel page table */
vmax = _REGION1_SIZE; /* 4-level kernel page table */
/* module area is at the end of the kernel address space. */
MODULES_END = vmax;
MODULES_VADDR = MODULES_END - MODULES_LEN;
@ -818,6 +818,9 @@ static int __init setup_hwcaps(void)
case 0x2965:
strcpy(elf_platform, "z13");
break;
case 0x3906:
strcpy(elf_platform, "z14");
break;
}
/*
@ -922,6 +925,7 @@ void __init setup_arch(char **cmdline_p)
setup_memory_end();
setup_memory();
dma_contiguous_reserve(memory_end);
vmcp_cma_reserve();
check_initrd();
reserve_crashkernel();

1
arch/s390/kernel/smp.c
View File

@ -1181,6 +1181,7 @@ static int __init s390_smp_init(void)
rc = cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "s390/smp:online",
smp_cpu_online, smp_cpu_pre_down);
rc = rc <= 0 ? rc : 0;
out:
return rc;
}

22
arch/s390/kernel/suspend.c
View File

@ -98,10 +98,16 @@ int page_key_alloc(unsigned long pages)
*/
void page_key_read(unsigned long *pfn)
{
struct page *page;
unsigned long addr;
unsigned char key;
addr = (unsigned long) page_address(pfn_to_page(*pfn));
*(unsigned char *) pfn = (unsigned char) page_get_storage_key(addr);
page = pfn_to_page(*pfn);
addr = (unsigned long) page_address(page);
key = (unsigned char) page_get_storage_key(addr) & 0x7f;
if (arch_test_page_nodat(page))
key |= 0x80;
*(unsigned char *) pfn = key;
}
/*
@ -126,8 +132,16 @@ void page_key_memorize(unsigned long *pfn)
*/
void page_key_write(void *address)
{
page_set_storage_key((unsigned long) address,
page_key_rp->data[page_key_rx], 0);
struct page *page;
unsigned char key;
key = page_key_rp->data[page_key_rx];
page_set_storage_key((unsigned long) address, key & 0x7f, 0);
page = virt_to_page(address);
if (key & 0x80)
arch_set_page_nodat(page, 0);
else
arch_set_page_dat(page, 0);
if (++page_key_rx >= PAGE_KEY_DATA_SIZE)
return;
page_key_rp = page_key_rp->next;

67
arch/s390/kernel/time.c
View File

@ -51,8 +51,15 @@
#include <asm/cio.h>
#include "entry.h"
u64 sched_clock_base_cc = -1; /* Force to data section. */
EXPORT_SYMBOL_GPL(sched_clock_base_cc);
unsigned char tod_clock_base[16] __aligned(8) = {
/* Force to data section. */
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};
EXPORT_SYMBOL_GPL(tod_clock_base);
u64 clock_comparator_max = -1ULL;
EXPORT_SYMBOL_GPL(clock_comparator_max);
static DEFINE_PER_CPU(struct clock_event_device, comparators);
@ -75,7 +82,7 @@ void __init time_early_init(void)
struct ptff_qui qui;
/* Initialize TOD steering parameters */
tod_steering_end = sched_clock_base_cc;
tod_steering_end = *(unsigned long long *) &tod_clock_base[1];
vdso_data->ts_end = tod_steering_end;
if (!test_facility(28))
@ -111,22 +118,27 @@ unsigned long long monotonic_clock(void)
}
EXPORT_SYMBOL(monotonic_clock);
static void tod_to_timeval(__u64 todval, struct timespec64 *xt)
static void ext_to_timespec64(unsigned char *clk, struct timespec64 *xt)
{
unsigned long long sec;
unsigned long long high, low, rem, sec, nsec;
/* Split extendnd TOD clock to micro-seconds and sub-micro-seconds */
high = (*(unsigned long long *) clk) >> 4;
low = (*(unsigned long long *)&clk[7]) << 4;
/* Calculate seconds and nano-seconds */
sec = high;
rem = do_div(sec, 1000000);
nsec = (((low >> 32) + (rem << 32)) * 1000) >> 32;
sec = todval >> 12;
do_div(sec, 1000000);
xt->tv_sec = sec;
todval -= (sec * 1000000) << 12;
xt->tv_nsec = ((todval * 1000) >> 12);
xt->tv_nsec = nsec;
}
void clock_comparator_work(void)
{
struct clock_event_device *cd;
S390_lowcore.clock_comparator = -1ULL;
S390_lowcore.clock_comparator = clock_comparator_max;
cd = this_cpu_ptr(&comparators);
cd->event_handler(cd);
}
@ -148,7 +160,7 @@ void init_cpu_timer(void)
struct clock_event_device *cd;
int cpu;
S390_lowcore.clock_comparator = -1ULL;
S390_lowcore.clock_comparator = clock_comparator_max;
set_clock_comparator(S390_lowcore.clock_comparator);
cpu = smp_processor_id();
@ -179,7 +191,7 @@ static void clock_comparator_interrupt(struct ext_code ext_code,
unsigned long param64)
{
inc_irq_stat(IRQEXT_CLK);
if (S390_lowcore.clock_comparator == -1ULL)
if (S390_lowcore.clock_comparator == clock_comparator_max)
set_clock_comparator(S390_lowcore.clock_comparator);
}
@ -197,18 +209,28 @@ static void stp_reset(void);
void read_persistent_clock64(struct timespec64 *ts)
{
__u64 clock;
unsigned char clk[STORE_CLOCK_EXT_SIZE];
__u64 delta;
clock = get_tod_clock() - initial_leap_seconds;
tod_to_timeval(clock - TOD_UNIX_EPOCH, ts);
delta = initial_leap_seconds + TOD_UNIX_EPOCH;
get_tod_clock_ext(clk);
*(__u64 *) &clk[1] -= delta;
if (*(__u64 *) &clk[1] > delta)
clk[0]--;
ext_to_timespec64(clk, ts);
}
void read_boot_clock64(struct timespec64 *ts)
{
__u64 clock;
unsigned char clk[STORE_CLOCK_EXT_SIZE];
__u64 delta;
clock = sched_clock_base_cc - initial_leap_seconds;
tod_to_timeval(clock - TOD_UNIX_EPOCH, ts);
delta = initial_leap_seconds + TOD_UNIX_EPOCH;
memcpy(clk, tod_clock_base, 16);
*(__u64 *) &clk[1] -= delta;
if (*(__u64 *) &clk[1] > delta)
clk[0]--;
ext_to_timespec64(clk, ts);
}
static u64 read_tod_clock(struct clocksource *cs)
@ -335,7 +357,7 @@ static unsigned long clock_sync_flags;
* source. If the clock mode is local it will return -EOPNOTSUPP and
* -EAGAIN if the clock is not in sync with the external reference.
*/
int get_phys_clock(unsigned long long *clock)
int get_phys_clock(unsigned long *clock)
{
atomic_t *sw_ptr;
unsigned int sw0, sw1;
@ -406,7 +428,10 @@ static void clock_sync_global(unsigned long long delta)
struct ptff_qto qto;
/* Fixup the monotonic sched clock. */
sched_clock_base_cc += delta;
*(unsigned long long *) &tod_clock_base[1] += delta;
if (*(unsigned long long *) &tod_clock_base[1] < delta)
/* Epoch overflow */
tod_clock_base[0]++;
/* Adjust TOD steering parameters. */
vdso_data->tb_update_count++;
now = get_tod_clock();
@ -437,7 +462,7 @@ static void clock_sync_global(unsigned long long delta)
static void clock_sync_local(unsigned long long delta)
{
/* Add the delta to the clock comparator. */
if (S390_lowcore.clock_comparator != -1ULL) {
if (S390_lowcore.clock_comparator != clock_comparator_max) {
S390_lowcore.clock_comparator += delta;
set_clock_comparator(S390_lowcore.clock_comparator);
}

2
arch/s390/kernel/vdso.c
View File

@ -157,6 +157,8 @@ int vdso_alloc_per_cpu(struct lowcore *lowcore)
page_frame = get_zeroed_page(GFP_KERNEL);
if (!segment_table || !page_table || !page_frame)
goto out;
arch_set_page_dat(virt_to_page(segment_table), SEGMENT_ORDER);
arch_set_page_dat(virt_to_page(page_table), 0);
/* Initialize per-cpu vdso data page */
vd = (struct vdso_per_cpu_data *) page_frame;

4
arch/s390/kernel/vdso32/vdso32.lds.S
View File

@ -2,6 +2,8 @@
* This is the infamous ld script for the 32 bits vdso
* library
*/
#include <asm/page.h>
#include <asm/vdso.h>
OUTPUT_FORMAT("elf32-s390", "elf32-s390", "elf32-s390")
@ -91,7 +93,7 @@ SECTIONS
.debug_ranges 0 : { *(.debug_ranges) }
.gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
. = ALIGN(4096);
. = ALIGN(PAGE_SIZE);
PROVIDE(_vdso_data = .);
/DISCARD/ : {

4
arch/s390/kernel/vdso64/vdso64.lds.S
View File

@ -2,6 +2,8 @@
* This is the infamous ld script for the 64 bits vdso
* library
*/
#include <asm/page.h>
#include <asm/vdso.h>
OUTPUT_FORMAT("elf64-s390", "elf64-s390", "elf64-s390")
@ -91,7 +93,7 @@ SECTIONS
.debug_ranges 0 : { *(.debug_ranges) }
.gnu.attributes 0 : { KEEP (*(.gnu.attributes)) }
. = ALIGN(4096);
. = ALIGN(PAGE_SIZE);
PROVIDE(_vdso_data = .);
/DISCARD/ : {

8
arch/s390/kvm/diag.c
View File

@ -27,7 +27,7 @@ static int diag_release_pages(struct kvm_vcpu *vcpu)
unsigned long prefix = kvm_s390_get_prefix(vcpu);
start = vcpu->run->s.regs.gprs[(vcpu->arch.sie_block->ipa & 0xf0) >> 4];
end = vcpu->run->s.regs.gprs[vcpu->arch.sie_block->ipa & 0xf] + 4096;
end = vcpu->run->s.regs.gprs[vcpu->arch.sie_block->ipa & 0xf] + PAGE_SIZE;
vcpu->stat.diagnose_10++;
if (start & ~PAGE_MASK || end & ~PAGE_MASK || start >= end
@ -51,9 +51,9 @@ static int diag_release_pages(struct kvm_vcpu *vcpu)
*/
gmap_discard(vcpu->arch.gmap, start, prefix);
if (start <= prefix)
gmap_discard(vcpu->arch.gmap, 0, 4096);
if (end > prefix + 4096)
gmap_discard(vcpu->arch.gmap, 4096, 8192);
gmap_discard(vcpu->arch.gmap, 0, PAGE_SIZE);
if (end > prefix + PAGE_SIZE)
gmap_discard(vcpu->arch.gmap, PAGE_SIZE, 2 * PAGE_SIZE);
gmap_discard(vcpu->arch.gmap, prefix + 2 * PAGE_SIZE, end);
}
return 0;

35
arch/s390/kvm/gaccess.c
View File

@ -629,7 +629,7 @@ static unsigned long guest_translate(struct kvm_vcpu *vcpu, unsigned long gva,
iep = ctlreg0.iep && test_kvm_facility(vcpu->kvm, 130);
if (asce.r)
goto real_address;
ptr = asce.origin * 4096;
ptr = asce.origin * PAGE_SIZE;
switch (asce.dt) {
case ASCE_TYPE_REGION1:
if (vaddr.rfx01 > asce.tl)
@ -674,7 +674,7 @@ static unsigned long guest_translate(struct kvm_vcpu *vcpu, unsigned long gva,
return PGM_REGION_SECOND_TRANS;
if (edat1)
dat_protection |= rfte.p;
ptr = rfte.rto * 4096 + vaddr.rsx * 8;
ptr = rfte.rto * PAGE_SIZE + vaddr.rsx * 8;
}
/* fallthrough */
case ASCE_TYPE_REGION2: {
@ -692,7 +692,7 @@ static unsigned long guest_translate(struct kvm_vcpu *vcpu, unsigned long gva,
return PGM_REGION_THIRD_TRANS;
if (edat1)
dat_protection |= rste.p;
ptr = rste.rto * 4096 + vaddr.rtx * 8;
ptr = rste.rto * PAGE_SIZE + vaddr.rtx * 8;
}
/* fallthrough */
case ASCE_TYPE_REGION3: {
@ -720,7 +720,7 @@ static unsigned long guest_translate(struct kvm_vcpu *vcpu, unsigned long gva,
return PGM_SEGMENT_TRANSLATION;
if (edat1)
dat_protection |= rtte.fc0.p;
ptr = rtte.fc0.sto * 4096 + vaddr.sx * 8;
ptr = rtte.fc0.sto * PAGE_SIZE + vaddr.sx * 8;
}
/* fallthrough */
case ASCE_TYPE_SEGMENT: {
@ -743,7 +743,7 @@ static unsigned long guest_translate(struct kvm_vcpu *vcpu, unsigned long gva,
goto absolute_address;
}
dat_protection |= ste.fc0.p;
ptr = ste.fc0.pto * 2048 + vaddr.px * 8;
ptr = ste.fc0.pto * (PAGE_SIZE / 2) + vaddr.px * 8;
}
}
if (kvm_is_error_gpa(vcpu->kvm, ptr))
@ -993,7 +993,7 @@ static int kvm_s390_shadow_tables(struct gmap *sg, unsigned long saddr,
parent = sg->parent;
vaddr.addr = saddr;
asce.val = sg->orig_asce;
ptr = asce.origin * 4096;
ptr = asce.origin * PAGE_SIZE;
if (asce.r) {
*fake = 1;
ptr = 0;
@ -1029,7 +1029,7 @@ static int kvm_s390_shadow_tables(struct gmap *sg, unsigned long saddr,
union region1_table_entry rfte;
if (*fake) {
ptr += (unsigned long) vaddr.rfx << 53;
ptr += vaddr.rfx * _REGION1_SIZE;
rfte.val = ptr;
goto shadow_r2t;
}
@ -1044,7 +1044,7 @@ static int kvm_s390_shadow_tables(struct gmap *sg, unsigned long saddr,
return PGM_REGION_SECOND_TRANS;
if (sg->edat_level >= 1)
*dat_protection |= rfte.p;
ptr = rfte.rto << 12UL;
ptr = rfte.rto * PAGE_SIZE;
shadow_r2t:
rc = gmap_shadow_r2t(sg, saddr, rfte.val, *fake);
if (rc)
@ -1055,7 +1055,7 @@ shadow_r2t:
union region2_table_entry rste;
if (*fake) {
ptr += (unsigned long) vaddr.rsx << 42;
ptr += vaddr.rsx * _REGION2_SIZE;
rste.val = ptr;
goto shadow_r3t;
}
@ -1070,7 +1070,7 @@ shadow_r2t:
return PGM_REGION_THIRD_TRANS;
if (sg->edat_level >= 1)
*dat_protection |= rste.p;
ptr = rste.rto << 12UL;
ptr = rste.rto * PAGE_SIZE;
shadow_r3t:
rste.p |= *dat_protection;
rc = gmap_shadow_r3t(sg, saddr, rste.val, *fake);
@ -1082,7 +1082,7 @@ shadow_r3t:
union region3_table_entry rtte;
if (*fake) {
ptr += (unsigned long) vaddr.rtx << 31;
ptr += vaddr.rtx * _REGION3_SIZE;
rtte.val = ptr;
goto shadow_sgt;
}
@ -1098,7 +1098,7 @@ shadow_r3t:
if (rtte.fc && sg->edat_level >= 2) {
*dat_protection |= rtte.fc0.p;
*fake = 1;
ptr = rtte.fc1.rfaa << 31UL;
ptr = rtte.fc1.rfaa * _REGION3_SIZE;
rtte.val = ptr;
goto shadow_sgt;
}
@ -1106,7 +1106,7 @@ shadow_r3t:
return PGM_SEGMENT_TRANSLATION;
if (sg->edat_level >= 1)
*dat_protection |= rtte.fc0.p;
ptr = rtte.fc0.sto << 12UL;
ptr = rtte.fc0.sto * PAGE_SIZE;
shadow_sgt:
rtte.fc0.p |= *dat_protection;
rc = gmap_shadow_sgt(sg, saddr, rtte.val, *fake);
@ -1118,7 +1118,7 @@ shadow_sgt:
union segment_table_entry ste;
if (*fake) {
ptr += (unsigned long) vaddr.sx << 20;
ptr += vaddr.sx * _SEGMENT_SIZE;
ste.val = ptr;
goto shadow_pgt;
}
@ -1134,11 +1134,11 @@ shadow_sgt:
*dat_protection |= ste.fc0.p;
if (ste.fc && sg->edat_level >= 1) {
*fake = 1;
ptr = ste.fc1.sfaa << 20UL;
ptr = ste.fc1.sfaa * _SEGMENT_SIZE;
ste.val = ptr;
goto shadow_pgt;
}
ptr = ste.fc0.pto << 11UL;
ptr = ste.fc0.pto * (PAGE_SIZE / 2);
shadow_pgt:
ste.fc0.p |= *dat_protection;
rc = gmap_shadow_pgt(sg, saddr, ste.val, *fake);
@ -1187,8 +1187,7 @@ int kvm_s390_shadow_fault(struct kvm_vcpu *vcpu, struct gmap *sg,
vaddr.addr = saddr;
if (fake) {
/* offset in 1MB guest memory block */
pte.val = pgt + ((unsigned long) vaddr.px << 12UL);
pte.val = pgt + vaddr.px * PAGE_SIZE;
goto shadow_page;
}
if (!rc)

8
arch/s390/kvm/priv.c
View File

@ -329,7 +329,7 @@ static int handle_sske(struct kvm_vcpu *vcpu)
start = kvm_s390_logical_to_effective(vcpu, start);
if (m3 & SSKE_MB) {
/* start already designates an absolute address */
end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
end = (start + _SEGMENT_SIZE) & ~(_SEGMENT_SIZE - 1);
} else {
start = kvm_s390_real_to_abs(vcpu, start);
end = start + PAGE_SIZE;
@ -893,10 +893,10 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
case 0x00000000:
/* only 4k frames specify a real address */
start = kvm_s390_real_to_abs(vcpu, start);
end = (start + (1UL << 12)) & ~((1UL << 12) - 1);
end = (start + PAGE_SIZE) & ~(PAGE_SIZE - 1);
break;
case 0x00001000:
end = (start + (1UL << 20)) & ~((1UL << 20) - 1);
end = (start + _SEGMENT_SIZE) & ~(_SEGMENT_SIZE - 1);
break;
case 0x00002000:
/* only support 2G frame size if EDAT2 is available and we are
@ -904,7 +904,7 @@ static int handle_pfmf(struct kvm_vcpu *vcpu)
if (!test_kvm_facility(vcpu->kvm, 78) ||
psw_bits(vcpu->arch.sie_block->gpsw).eaba == PSW_BITS_AMODE_24BIT)
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);
end = (start + (1UL << 31)) & ~((1UL << 31) - 1);
end = (start + _REGION3_SIZE) & ~(_REGION3_SIZE - 1);
break;
default:
return kvm_s390_inject_program_int(vcpu, PGM_SPECIFICATION);

2
arch/s390/kvm/vsie.c
View File

@ -1069,7 +1069,7 @@ int kvm_s390_handle_vsie(struct kvm_vcpu *vcpu)
if (vcpu->arch.sie_block->gpsw.mask & PSW_MASK_PSTATE)
return kvm_s390_inject_program_int(vcpu, PGM_PRIVILEGED_OP);
BUILD_BUG_ON(sizeof(struct vsie_page) != 4096);
BUILD_BUG_ON(sizeof(struct vsie_page) != PAGE_SIZE);
scb_addr = kvm_s390_get_base_disp_s(vcpu, NULL);
/* 512 byte alignment */

2
arch/s390/lib/delay.c
View File

@ -57,7 +57,7 @@ static void __udelay_enabled(unsigned long long usecs)
end = get_tod_clock_fast() + (usecs << 12);
do {
clock_saved = 0;
if (end < S390_lowcore.clock_comparator) {
if (tod_after(S390_lowcore.clock_comparator, end)) {
clock_saved = local_tick_disable();
set_clock_comparator(end);
}

87
arch/s390/lib/spinlock.c
View File

@ -32,42 +32,63 @@ static int __init spin_retry_setup(char *str)
}
__setup("spin_retry=", spin_retry_setup);
static inline int arch_load_niai4(int *lock)
{
int owner;
asm volatile(
#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
" .long 0xb2fa0040\n" /* NIAI 4 */
#endif
" l %0,%1\n"
: "=d" (owner) : "Q" (*lock) : "memory");
return owner;
}
static inline int arch_cmpxchg_niai8(int *lock, int old, int new)
{
int expected = old;
asm volatile(
#ifdef CONFIG_HAVE_MARCH_ZEC12_FEATURES
" .long 0xb2fa0080\n" /* NIAI 8 */
#endif
" cs %0,%3,%1\n"
: "=d" (old), "=Q" (*lock)
: "0" (old), "d" (new), "Q" (*lock)
: "cc", "memory");
return expected == old;
}
void arch_spin_lock_wait(arch_spinlock_t *lp)
{
int cpu = SPINLOCK_LOCKVAL;
int owner, count, first_diag;
int owner, count;
first_diag = 1;
/* Pass the virtual CPU to the lock holder if it is not running */
owner = arch_load_niai4(&lp->lock);
if (owner && arch_vcpu_is_preempted(~owner))
smp_yield_cpu(~owner);
count = spin_retry;
while (1) {
owner = ACCESS_ONCE(lp->lock);
owner = arch_load_niai4(&lp->lock);
/* Try to get the lock if it is free. */
if (!owner) {
if (__atomic_cmpxchg_bool(&lp->lock, 0, cpu))
if (arch_cmpxchg_niai8(&lp->lock, 0, cpu))
return;
continue;
}
/* First iteration: check if the lock owner is running. */
if (first_diag && arch_vcpu_is_preempted(~owner)) {
smp_yield_cpu(~owner);
first_diag = 0;
if (count-- >= 0)
continue;
}
/* Loop for a while on the lock value. */
count = spin_retry;
do {
owner = ACCESS_ONCE(lp->lock);
} while (owner && count-- > 0);
if (!owner)
continue;
/*
* For multiple layers of hypervisors, e.g. z/VM + LPAR
* yield the CPU unconditionally. For LPAR rely on the
* sense running status.
*/
if (!MACHINE_IS_LPAR || arch_vcpu_is_preempted(~owner)) {
if (!MACHINE_IS_LPAR || arch_vcpu_is_preempted(~owner))
smp_yield_cpu(~owner);
first_diag = 0;
}
}
}
EXPORT_SYMBOL(arch_spin_lock_wait);
@ -75,42 +96,36 @@ EXPORT_SYMBOL(arch_spin_lock_wait);
void arch_spin_lock_wait_flags(arch_spinlock_t *lp, unsigned long flags)
{
int cpu = SPINLOCK_LOCKVAL;
int owner, count, first_diag;
int owner, count;
local_irq_restore(flags);
first_diag = 1;
/* Pass the virtual CPU to the lock holder if it is not running */
owner = arch_load_niai4(&lp->lock);
if (owner && arch_vcpu_is_preempted(~owner))
smp_yield_cpu(~owner);
count = spin_retry;
while (1) {
owner = ACCESS_ONCE(lp->lock);
owner = arch_load_niai4(&lp->lock);
/* Try to get the lock if it is free. */
if (!owner) {
local_irq_disable();
if (__atomic_cmpxchg_bool(&lp->lock, 0, cpu))
if (arch_cmpxchg_niai8(&lp->lock, 0, cpu))
return;
local_irq_restore(flags);
continue;
}
/* Check if the lock owner is running. */
if (first_diag && arch_vcpu_is_preempted(~owner)) {
smp_yield_cpu(~owner);
first_diag = 0;
if (count-- >= 0)
continue;
}
/* Loop for a while on the lock value. */
count = spin_retry;
do {
owner = ACCESS_ONCE(lp->lock);
} while (owner && count-- > 0);
if (!owner)
continue;
/*
* For multiple layers of hypervisors, e.g. z/VM + LPAR
* yield the CPU unconditionally. For LPAR rely on the
* sense running status.
*/
if (!MACHINE_IS_LPAR || arch_vcpu_is_preempted(~owner)) {
if (!MACHINE_IS_LPAR || arch_vcpu_is_preempted(~owner))
smp_yield_cpu(~owner);
first_diag = 0;
}
}
}
EXPORT_SYMBOL(arch_spin_lock_wait_flags);

38
arch/s390/lib/uaccess.c
View File

@ -15,8 +15,30 @@
#include <asm/mmu_context.h>
#include <asm/facility.h>
#ifndef CONFIG_HAVE_MARCH_Z10_FEATURES
static DEFINE_STATIC_KEY_FALSE(have_mvcos);
static int __init uaccess_init(void)
{
if (test_facility(27))
static_branch_enable(&have_mvcos);
return 0;
}
early_initcall(uaccess_init);
static inline int copy_with_mvcos(void)
{
if (static_branch_likely(&have_mvcos))
return 1;
return 0;
}
#else
static inline int copy_with_mvcos(void)
{
return 1;
}
#endif
static inline unsigned long copy_from_user_mvcos(void *x, const void __user *ptr,
unsigned long size)
{
@ -84,7 +106,7 @@ static inline unsigned long copy_from_user_mvcp(void *x, const void __user *ptr,
unsigned long raw_copy_from_user(void *to, const void __user *from, unsigned long n)
{
if (static_branch_likely(&have_mvcos))
if (copy_with_mvcos())
return copy_from_user_mvcos(to, from, n);
return copy_from_user_mvcp(to, from, n);
}
@ -157,7 +179,7 @@ static inline unsigned long copy_to_user_mvcs(void __user *ptr, const void *x,
unsigned long raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
if (static_branch_likely(&have_mvcos))
if (copy_with_mvcos())
return copy_to_user_mvcos(to, from, n);
return copy_to_user_mvcs(to, from, n);
}
@ -220,7 +242,7 @@ static inline unsigned long copy_in_user_mvc(void __user *to, const void __user
unsigned long raw_copy_in_user(void __user *to, const void __user *from, unsigned long n)
{
if (static_branch_likely(&have_mvcos))
if (copy_with_mvcos())
return copy_in_user_mvcos(to, from, n);
return copy_in_user_mvc(to, from, n);
}
@ -292,7 +314,7 @@ static inline unsigned long clear_user_xc(void __user *to, unsigned long size)
unsigned long __clear_user(void __user *to, unsigned long size)
{
if (static_branch_likely(&have_mvcos))
if (copy_with_mvcos())
return clear_user_mvcos(to, size);
return clear_user_xc(to, size);
}
@ -349,11 +371,3 @@ long __strncpy_from_user(char *dst, const char __user *src, long size)
return done;
}
EXPORT_SYMBOL(__strncpy_from_user);
static int __init uaccess_init(void)
{
if (test_facility(27))
static_branch_enable(&have_mvcos);
return 0;
}
early_initcall(uaccess_init);

10
arch/s390/mm/fault.c
View File

@ -135,7 +135,7 @@ static void dump_pagetable(unsigned long asce, unsigned long address)
pr_alert("AS:%016lx ", asce);
switch (asce & _ASCE_TYPE_MASK) {
case _ASCE_TYPE_REGION1:
table = table + ((address >> 53) & 0x7ff);
table += (address & _REGION1_INDEX) >> _REGION1_SHIFT;
if (bad_address(table))
goto bad;
pr_cont("R1:%016lx ", *table);
@ -144,7 +144,7 @@ static void dump_pagetable(unsigned long asce, unsigned long address)
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
/* fallthrough */
case _ASCE_TYPE_REGION2:
table = table + ((address >> 42) & 0x7ff);
table += (address & _REGION2_INDEX) >> _REGION2_SHIFT;
if (bad_address(table))
goto bad;
pr_cont("R2:%016lx ", *table);
@ -153,7 +153,7 @@ static void dump_pagetable(unsigned long asce, unsigned long address)
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
/* fallthrough */
case _ASCE_TYPE_REGION3:
table = table + ((address >> 31) & 0x7ff);
table += (address & _REGION3_INDEX) >> _REGION3_SHIFT;
if (bad_address(table))
goto bad;
pr_cont("R3:%016lx ", *table);
@ -162,7 +162,7 @@ static void dump_pagetable(unsigned long asce, unsigned long address)
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
/* fallthrough */
case _ASCE_TYPE_SEGMENT:
table = table + ((address >> 20) & 0x7ff);
table += (address & _SEGMENT_INDEX) >> _SEGMENT_SHIFT;
if (bad_address(table))
goto bad;
pr_cont("S:%016lx ", *table);
@ -170,7 +170,7 @@ static void dump_pagetable(unsigned long asce, unsigned long address)
goto out;
table = (unsigned long *)(*table & _SEGMENT_ENTRY_ORIGIN);
}
table = table + ((address >> 12) & 0xff);
table += (address & _PAGE_INDEX) >> _PAGE_SHIFT;
if (bad_address(table))
goto bad;
pr_cont("P:%016lx ", *table);

163
arch/s390/mm/gmap.c
View File

@ -36,16 +36,16 @@ static struct gmap *gmap_alloc(unsigned long limit)
unsigned long *table;
unsigned long etype, atype;
if (limit < (1UL << 31)) {
limit = (1UL << 31) - 1;
if (limit < _REGION3_SIZE) {
limit = _REGION3_SIZE - 1;
atype = _ASCE_TYPE_SEGMENT;
etype = _SEGMENT_ENTRY_EMPTY;
} else if (limit < (1UL << 42)) {
limit = (1UL << 42) - 1;
} else if (limit < _REGION2_SIZE) {
limit = _REGION2_SIZE - 1;
atype = _ASCE_TYPE_REGION3;
etype = _REGION3_ENTRY_EMPTY;
} else if (limit < (1UL << 53)) {
limit = (1UL << 53) - 1;
} else if (limit < _REGION1_SIZE) {
limit = _REGION1_SIZE - 1;
atype = _ASCE_TYPE_REGION2;
etype = _REGION2_ENTRY_EMPTY;
} else {
@ -65,7 +65,7 @@ static struct gmap *gmap_alloc(unsigned long limit)
spin_lock_init(&gmap->guest_table_lock);
spin_lock_init(&gmap->shadow_lock);
atomic_set(&gmap->ref_count, 1);
page = alloc_pages(GFP_KERNEL, 2);
page = alloc_pages(GFP_KERNEL, CRST_ALLOC_ORDER);
if (!page)
goto out_free;
page->index = 0;
@ -186,7 +186,7 @@ static void gmap_free(struct gmap *gmap)
gmap_flush_tlb(gmap);
/* Free all segment & region tables. */
list_for_each_entry_safe(page, next, &gmap->crst_list, lru)
__free_pages(page, 2);
__free_pages(page, CRST_ALLOC_ORDER);
gmap_radix_tree_free(&gmap->guest_to_host);
gmap_radix_tree_free(&gmap->host_to_guest);
@ -306,7 +306,7 @@ static int gmap_alloc_table(struct gmap *gmap, unsigned long *table,
unsigned long *new;
/* since we dont free the gmap table until gmap_free we can unlock */
page = alloc_pages(GFP_KERNEL, 2);
page = alloc_pages(GFP_KERNEL, CRST_ALLOC_ORDER);
if (!page)
return -ENOMEM;
new = (unsigned long *) page_to_phys(page);
@ -321,7 +321,7 @@ static int gmap_alloc_table(struct gmap *gmap, unsigned long *table,
}
spin_unlock(&gmap->guest_table_lock);
if (page)
__free_pages(page, 2);
__free_pages(page, CRST_ALLOC_ORDER);
return 0;
}
@ -546,30 +546,30 @@ int __gmap_link(struct gmap *gmap, unsigned long gaddr, unsigned long vmaddr)
/* Create higher level tables in the gmap page table */
table = gmap->table;
if ((gmap->asce & _ASCE_TYPE_MASK) >= _ASCE_TYPE_REGION1) {
table += (gaddr >> 53) & 0x7ff;
table += (gaddr & _REGION1_INDEX) >> _REGION1_SHIFT;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _REGION2_ENTRY_EMPTY,
gaddr & 0xffe0000000000000UL))
gaddr & _REGION1_MASK))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
if ((gmap->asce & _ASCE_TYPE_MASK) >= _ASCE_TYPE_REGION2) {
table += (gaddr >> 42) & 0x7ff;
table += (gaddr & _REGION2_INDEX) >> _REGION2_SHIFT;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _REGION3_ENTRY_EMPTY,
gaddr & 0xfffffc0000000000UL))
gaddr & _REGION2_MASK))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
if ((gmap->asce & _ASCE_TYPE_MASK) >= _ASCE_TYPE_REGION3) {
table += (gaddr >> 31) & 0x7ff;
table += (gaddr & _REGION3_INDEX) >> _REGION3_SHIFT;
if ((*table & _REGION_ENTRY_INVALID) &&
gmap_alloc_table(gmap, table, _SEGMENT_ENTRY_EMPTY,
gaddr & 0xffffffff80000000UL))
gaddr & _REGION3_MASK))
return -ENOMEM;
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
}
table += (gaddr >> 20) & 0x7ff;
table += (gaddr & _SEGMENT_INDEX) >> _SEGMENT_SHIFT;
/* Walk the parent mm page table */
mm = gmap->mm;
pgd = pgd_offset(mm, vmaddr);
@ -771,7 +771,7 @@ static inline unsigned long *gmap_table_walk(struct gmap *gmap,
table = gmap->table;
switch (gmap->asce & _ASCE_TYPE_MASK) {
case _ASCE_TYPE_REGION1:
table += (gaddr >> 53) & 0x7ff;
table += (gaddr & _REGION1_INDEX) >> _REGION1_SHIFT;
if (level == 4)
break;
if (*table & _REGION_ENTRY_INVALID)
@ -779,7 +779,7 @@ static inline unsigned long *gmap_table_walk(struct gmap *gmap,
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
/* Fallthrough */
case _ASCE_TYPE_REGION2:
table += (gaddr >> 42) & 0x7ff;
table += (gaddr & _REGION2_INDEX) >> _REGION2_SHIFT;
if (level == 3)
break;
if (*table & _REGION_ENTRY_INVALID)
@ -787,7 +787,7 @@ static inline unsigned long *gmap_table_walk(struct gmap *gmap,
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
/* Fallthrough */
case _ASCE_TYPE_REGION3:
table += (gaddr >> 31) & 0x7ff;
table += (gaddr & _REGION3_INDEX) >> _REGION3_SHIFT;
if (level == 2)
break;
if (*table & _REGION_ENTRY_INVALID)
@ -795,13 +795,13 @@ static inline unsigned long *gmap_table_walk(struct gmap *gmap,
table = (unsigned long *)(*table & _REGION_ENTRY_ORIGIN);
/* Fallthrough */
case _ASCE_TYPE_SEGMENT:
table += (gaddr >> 20) & 0x7ff;
table += (gaddr & _SEGMENT_INDEX) >> _SEGMENT_SHIFT;
if (level == 1)
break;
if (*table & _REGION_ENTRY_INVALID)
return NULL;
table = (unsigned long *)(*table & _SEGMENT_ENTRY_ORIGIN);
table += (gaddr >> 12) & 0xff;
table += (gaddr & _PAGE_INDEX) >> _PAGE_SHIFT;
}
return table;
}
@ -1126,7 +1126,7 @@ static void gmap_unshadow_page(struct gmap *sg, unsigned long raddr)
table = gmap_table_walk(sg, raddr, 0); /* get page table pointer */
if (!table || *table & _PAGE_INVALID)
return;
gmap_call_notifier(sg, raddr, raddr + (1UL << 12) - 1);
gmap_call_notifier(sg, raddr, raddr + _PAGE_SIZE - 1);
ptep_unshadow_pte(sg->mm, raddr, (pte_t *) table);
}
@ -1144,7 +1144,7 @@ static void __gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr,
int i;
BUG_ON(!gmap_is_shadow(sg));
for (i = 0; i < 256; i++, raddr += 1UL << 12)
for (i = 0; i < _PAGE_ENTRIES; i++, raddr += _PAGE_SIZE)
pgt[i] = _PAGE_INVALID;
}
@ -1164,8 +1164,8 @@ static void gmap_unshadow_pgt(struct gmap *sg, unsigned long raddr)
ste = gmap_table_walk(sg, raddr, 1); /* get segment pointer */
if (!ste || !(*ste & _SEGMENT_ENTRY_ORIGIN))
return;
gmap_call_notifier(sg, raddr, raddr + (1UL << 20) - 1);
sto = (unsigned long) (ste - ((raddr >> 20) & 0x7ff));
gmap_call_notifier(sg, raddr, raddr + _SEGMENT_SIZE - 1);
sto = (unsigned long) (ste - ((raddr & _SEGMENT_INDEX) >> _SEGMENT_SHIFT));
gmap_idte_one(sto | _ASCE_TYPE_SEGMENT, raddr);
pgt = (unsigned long *)(*ste & _SEGMENT_ENTRY_ORIGIN);
*ste = _SEGMENT_ENTRY_EMPTY;
@ -1193,7 +1193,7 @@ static void __gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr,
BUG_ON(!gmap_is_shadow(sg));
asce = (unsigned long) sgt | _ASCE_TYPE_SEGMENT;
for (i = 0; i < 2048; i++, raddr += 1UL << 20) {
for (i = 0; i < _CRST_ENTRIES; i++, raddr += _SEGMENT_SIZE) {
if (!(sgt[i] & _SEGMENT_ENTRY_ORIGIN))
continue;
pgt = (unsigned long *)(sgt[i] & _REGION_ENTRY_ORIGIN);
@ -1222,8 +1222,8 @@ static void gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr)
r3e = gmap_table_walk(sg, raddr, 2); /* get region-3 pointer */
if (!r3e || !(*r3e & _REGION_ENTRY_ORIGIN))
return;
gmap_call_notifier(sg, raddr, raddr + (1UL << 31) - 1);
r3o = (unsigned long) (r3e - ((raddr >> 31) & 0x7ff));
gmap_call_notifier(sg, raddr, raddr + _REGION3_SIZE - 1);
r3o = (unsigned long) (r3e - ((raddr & _REGION3_INDEX) >> _REGION3_SHIFT));
gmap_idte_one(r3o | _ASCE_TYPE_REGION3, raddr);
sgt = (unsigned long *)(*r3e & _REGION_ENTRY_ORIGIN);
*r3e = _REGION3_ENTRY_EMPTY;
@ -1231,7 +1231,7 @@ static void gmap_unshadow_sgt(struct gmap *sg, unsigned long raddr)
/* Free segment table */
page = pfn_to_page(__pa(sgt) >> PAGE_SHIFT);
list_del(&page->lru);
__free_pages(page, 2);
__free_pages(page, CRST_ALLOC_ORDER);
}
/**
@ -1251,7 +1251,7 @@ static void __gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr,
BUG_ON(!gmap_is_shadow(sg));
asce = (unsigned long) r3t | _ASCE_TYPE_REGION3;
for (i = 0; i < 2048; i++, raddr += 1UL << 31) {
for (i = 0; i < _CRST_ENTRIES; i++, raddr += _REGION3_SIZE) {
if (!(r3t[i] & _REGION_ENTRY_ORIGIN))
continue;
sgt = (unsigned long *)(r3t[i] & _REGION_ENTRY_ORIGIN);
@ -1260,7 +1260,7 @@ static void __gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr,
/* Free segment table */
page = pfn_to_page(__pa(sgt) >> PAGE_SHIFT);
list_del(&page->lru);
__free_pages(page, 2);
__free_pages(page, CRST_ALLOC_ORDER);
}
}
@ -1280,8 +1280,8 @@ static void gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr)
r2e = gmap_table_walk(sg, raddr, 3); /* get region-2 pointer */
if (!r2e || !(*r2e & _REGION_ENTRY_ORIGIN))
return;
gmap_call_notifier(sg, raddr, raddr + (1UL << 42) - 1);
r2o = (unsigned long) (r2e - ((raddr >> 42) & 0x7ff));
gmap_call_notifier(sg, raddr, raddr + _REGION2_SIZE - 1);
r2o = (unsigned long) (r2e - ((raddr & _REGION2_INDEX) >> _REGION2_SHIFT));
gmap_idte_one(r2o | _ASCE_TYPE_REGION2, raddr);
r3t = (unsigned long *)(*r2e & _REGION_ENTRY_ORIGIN);
*r2e = _REGION2_ENTRY_EMPTY;
@ -1289,7 +1289,7 @@ static void gmap_unshadow_r3t(struct gmap *sg, unsigned long raddr)
/* Free region 3 table */
page = pfn_to_page(__pa(r3t) >> PAGE_SHIFT);
list_del(&page->lru);
__free_pages(page, 2);
__free_pages(page, CRST_ALLOC_ORDER);
}
/**
@ -1309,7 +1309,7 @@ static void __gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr,
BUG_ON(!gmap_is_shadow(sg));
asce = (unsigned long) r2t | _ASCE_TYPE_REGION2;
for (i = 0; i < 2048; i++, raddr += 1UL << 42) {
for (i = 0; i < _CRST_ENTRIES; i++, raddr += _REGION2_SIZE) {
if (!(r2t[i] & _REGION_ENTRY_ORIGIN))
continue;
r3t = (unsigned long *)(r2t[i] & _REGION_ENTRY_ORIGIN);
@ -1318,7 +1318,7 @@ static void __gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr,
/* Free region 3 table */
page = pfn_to_page(__pa(r3t) >> PAGE_SHIFT);
list_del(&page->lru);
__free_pages(page, 2);
__free_pages(page, CRST_ALLOC_ORDER);
}
}
@ -1338,8 +1338,8 @@ static void gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr)
r1e = gmap_table_walk(sg, raddr, 4); /* get region-1 pointer */
if (!r1e || !(*r1e & _REGION_ENTRY_ORIGIN))
return;
gmap_call_notifier(sg, raddr, raddr + (1UL << 53) - 1);
r1o = (unsigned long) (r1e - ((raddr >> 53) & 0x7ff));
gmap_call_notifier(sg, raddr, raddr + _REGION1_SIZE - 1);
r1o = (unsigned long) (r1e - ((raddr & _REGION1_INDEX) >> _REGION1_SHIFT));
gmap_idte_one(r1o | _ASCE_TYPE_REGION1, raddr);
r2t = (unsigned long *)(*r1e & _REGION_ENTRY_ORIGIN);
*r1e = _REGION1_ENTRY_EMPTY;
@ -1347,7 +1347,7 @@ static void gmap_unshadow_r2t(struct gmap *sg, unsigned long raddr)
/* Free region 2 table */
page = pfn_to_page(__pa(r2t) >> PAGE_SHIFT);
list_del(&page->lru);
__free_pages(page, 2);
__free_pages(page, CRST_ALLOC_ORDER);
}
/**
@ -1367,7 +1367,7 @@ static void __gmap_unshadow_r1t(struct gmap *sg, unsigned long raddr,
BUG_ON(!gmap_is_shadow(sg));
asce = (unsigned long) r1t | _ASCE_TYPE_REGION1;
for (i = 0; i < 2048; i++, raddr += 1UL << 53) {
for (i = 0; i < _CRST_ENTRIES; i++, raddr += _REGION1_SIZE) {
if (!(r1t[i] & _REGION_ENTRY_ORIGIN))
continue;
r2t = (unsigned long *)(r1t[i] & _REGION_ENTRY_ORIGIN);
@ -1378,7 +1378,7 @@ static void __gmap_unshadow_r1t(struct gmap *sg, unsigned long raddr,
/* Free region 2 table */
page = pfn_to_page(__pa(r2t) >> PAGE_SHIFT);
list_del(&page->lru);
__free_pages(page, 2);
__free_pages(page, CRST_ALLOC_ORDER);
}
}
@ -1535,7 +1535,7 @@ struct gmap *gmap_shadow(struct gmap *parent, unsigned long asce,
/* protect after insertion, so it will get properly invalidated */
down_read(&parent->mm->mmap_sem);
rc = gmap_protect_range(parent, asce & _ASCE_ORIGIN,
((asce & _ASCE_TABLE_LENGTH) + 1) * 4096,
((asce & _ASCE_TABLE_LENGTH) + 1) * PAGE_SIZE,
PROT_READ, PGSTE_VSIE_BIT);
up_read(&parent->mm->mmap_sem);
spin_lock(&parent->shadow_lock);
@ -1578,7 +1578,7 @@ int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t,
BUG_ON(!gmap_is_shadow(sg));
/* Allocate a shadow region second table */
page = alloc_pages(GFP_KERNEL, 2);
page = alloc_pages(GFP_KERNEL, CRST_ALLOC_ORDER);
if (!page)
return -ENOMEM;
page->index = r2t & _REGION_ENTRY_ORIGIN;
@ -1614,10 +1614,10 @@ int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t,
}
spin_unlock(&sg->guest_table_lock);
/* Make r2t read-only in parent gmap page table */
raddr = (saddr & 0xffe0000000000000UL) | _SHADOW_RMAP_REGION1;
raddr = (saddr & _REGION1_MASK) | _SHADOW_RMAP_REGION1;
origin = r2t & _REGION_ENTRY_ORIGIN;
offset = ((r2t & _REGION_ENTRY_OFFSET) >> 6) * 4096;
len = ((r2t & _REGION_ENTRY_LENGTH) + 1) * 4096 - offset;
offset = ((r2t & _REGION_ENTRY_OFFSET) >> 6) * PAGE_SIZE;
len = ((r2t & _REGION_ENTRY_LENGTH) + 1) * PAGE_SIZE - offset;
rc = gmap_protect_rmap(sg, raddr, origin + offset, len, PROT_READ);
spin_lock(&sg->guest_table_lock);
if (!rc) {
@ -1634,7 +1634,7 @@ int gmap_shadow_r2t(struct gmap *sg, unsigned long saddr, unsigned long r2t,
return rc;
out_free:
spin_unlock(&sg->guest_table_lock);
__free_pages(page, 2);
__free_pages(page, CRST_ALLOC_ORDER);
return rc;
}
EXPORT_SYMBOL_GPL(gmap_shadow_r2t);
@ -1662,7 +1662,7 @@ int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t,
BUG_ON(!gmap_is_shadow(sg));
/* Allocate a shadow region second table */
page = alloc_pages(GFP_KERNEL, 2);
page = alloc_pages(GFP_KERNEL, CRST_ALLOC_ORDER);
if (!page)
return -ENOMEM;
page->index = r3t & _REGION_ENTRY_ORIGIN;
@ -1697,10 +1697,10 @@ int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t,
}
spin_unlock(&sg->guest_table_lock);
/* Make r3t read-only in parent gmap page table */
raddr = (saddr & 0xfffffc0000000000UL) | _SHADOW_RMAP_REGION2;
raddr = (saddr & _REGION2_MASK) | _SHADOW_RMAP_REGION2;
origin = r3t & _REGION_ENTRY_ORIGIN;
offset = ((r3t & _REGION_ENTRY_OFFSET) >> 6) * 4096;
len = ((r3t & _REGION_ENTRY_LENGTH) + 1) * 4096 - offset;
offset = ((r3t & _REGION_ENTRY_OFFSET) >> 6) * PAGE_SIZE;
len = ((r3t & _REGION_ENTRY_LENGTH) + 1) * PAGE_SIZE - offset;
rc = gmap_protect_rmap(sg, raddr, origin + offset, len, PROT_READ);
spin_lock(&sg->guest_table_lock);
if (!rc) {
@ -1717,7 +1717,7 @@ int gmap_shadow_r3t(struct gmap *sg, unsigned long saddr, unsigned long r3t,
return rc;
out_free:
spin_unlock(&sg->guest_table_lock);
__free_pages(page, 2);
__free_pages(page, CRST_ALLOC_ORDER);
return rc;
}
EXPORT_SYMBOL_GPL(gmap_shadow_r3t);
@ -1745,7 +1745,7 @@ int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt,
BUG_ON(!gmap_is_shadow(sg) || (sgt & _REGION3_ENTRY_LARGE));
/* Allocate a shadow segment table */
page = alloc_pages(GFP_KERNEL, 2);
page = alloc_pages(GFP_KERNEL, CRST_ALLOC_ORDER);
if (!page)
return -ENOMEM;
page->index = sgt & _REGION_ENTRY_ORIGIN;
@ -1781,10 +1781,10 @@ int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt,
}
spin_unlock(&sg->guest_table_lock);
/* Make sgt read-only in parent gmap page table */
raddr = (saddr & 0xffffffff80000000UL) | _SHADOW_RMAP_REGION3;
raddr = (saddr & _REGION3_MASK) | _SHADOW_RMAP_REGION3;
origin = sgt & _REGION_ENTRY_ORIGIN;
offset = ((sgt & _REGION_ENTRY_OFFSET) >> 6) * 4096;
len = ((sgt & _REGION_ENTRY_LENGTH) + 1) * 4096 - offset;
offset = ((sgt & _REGION_ENTRY_OFFSET) >> 6) * PAGE_SIZE;
len = ((sgt & _REGION_ENTRY_LENGTH) + 1) * PAGE_SIZE - offset;
rc = gmap_protect_rmap(sg, raddr, origin + offset, len, PROT_READ);
spin_lock(&sg->guest_table_lock);
if (!rc) {
@ -1801,7 +1801,7 @@ int gmap_shadow_sgt(struct gmap *sg, unsigned long saddr, unsigned long sgt,
return rc;
out_free:
spin_unlock(&sg->guest_table_lock);
__free_pages(page, 2);
__free_pages(page, CRST_ALLOC_ORDER);
return rc;
}
EXPORT_SYMBOL_GPL(gmap_shadow_sgt);
@ -1902,7 +1902,7 @@ int gmap_shadow_pgt(struct gmap *sg, unsigned long saddr, unsigned long pgt,
}
spin_unlock(&sg->guest_table_lock);
/* Make pgt read-only in parent gmap page table (not the pgste) */
raddr = (saddr & 0xfffffffffff00000UL) | _SHADOW_RMAP_SEGMENT;
raddr = (saddr & _SEGMENT_MASK) | _SHADOW_RMAP_SEGMENT;
origin = pgt & _SEGMENT_ENTRY_ORIGIN & PAGE_MASK;
rc = gmap_protect_rmap(sg, raddr, origin, PAGE_SIZE, PROT_READ);
spin_lock(&sg->guest_table_lock);
@ -2021,7 +2021,7 @@ static void gmap_shadow_notify(struct gmap *sg, unsigned long vmaddr,
}
/* Check for top level table */
start = sg->orig_asce & _ASCE_ORIGIN;
end = start + ((sg->orig_asce & _ASCE_TABLE_LENGTH) + 1) * 4096;
end = start + ((sg->orig_asce & _ASCE_TABLE_LENGTH) + 1) * PAGE_SIZE;
if (!(sg->orig_asce & _ASCE_REAL_SPACE) && gaddr >= start &&
gaddr < end) {
/* The complete shadow table has to go */
@ -2032,7 +2032,7 @@ static void gmap_shadow_notify(struct gmap *sg, unsigned long vmaddr,
return;
}
/* Remove the page table tree from on specific entry */
head = radix_tree_delete(&sg->host_to_rmap, vmaddr >> 12);
head = radix_tree_delete(&sg->host_to_rmap, vmaddr >> PAGE_SHIFT);
gmap_for_each_rmap_safe(rmap, rnext, head) {
bits = rmap->raddr & _SHADOW_RMAP_MASK;
raddr = rmap->raddr ^ bits;
@ -2076,7 +2076,7 @@ void ptep_notify(struct mm_struct *mm, unsigned long vmaddr,
struct gmap *gmap, *sg, *next;
offset = ((unsigned long) pte) & (255 * sizeof(pte_t));
offset = offset * (4096 / sizeof(pte_t));
offset = offset * (PAGE_SIZE / sizeof(pte_t));
rcu_read_lock();
list_for_each_entry_rcu(gmap, &mm->context.gmap_list, list) {
spin_lock(&gmap->guest_table_lock);
@ -2120,6 +2120,37 @@ static inline void thp_split_mm(struct mm_struct *mm)
#endif
}
/*
* Remove all empty zero pages from the mapping for lazy refaulting
* - This must be called after mm->context.has_pgste is set, to avoid
* future creation of zero pages
* - This must be called after THP was enabled
*/
static int __zap_zero_pages(pmd_t *pmd, unsigned long start,
unsigned long end, struct mm_walk *walk)
{
unsigned long addr;
for (addr = start; addr != end; addr += PAGE_SIZE) {
pte_t *ptep;
spinlock_t *ptl;
ptep = pte_offset_map_lock(walk->mm, pmd, addr, &ptl);
if (is_zero_pfn(pte_pfn(*ptep)))
ptep_xchg_direct(walk->mm, addr, ptep, __pte(_PAGE_INVALID));
pte_unmap_unlock(ptep, ptl);
}
return 0;
}
static inline void zap_zero_pages(struct mm_struct *mm)
{
struct mm_walk walk = { .pmd_entry = __zap_zero_pages };
walk.mm = mm;
walk_page_range(0, TASK_SIZE, &walk);
}
/*
* switch on pgstes for its userspace process (for kvm)
*/
@ -2137,6 +2168,7 @@ int s390_enable_sie(void)
mm->context.has_pgste = 1;
/* split thp mappings and disable thp for future mappings */
thp_split_mm(mm);
zap_zero_pages(mm);
up_write(&mm->mmap_sem);
return 0;
}
@ -2149,13 +2181,6 @@ EXPORT_SYMBOL_GPL(s390_enable_sie);
static int __s390_enable_skey(pte_t *pte, unsigned long addr,
unsigned long next, struct mm_walk *walk)
{
/*
* Remove all zero page mappings,
* after establishing a policy to forbid zero page mappings
* following faults for that page will get fresh anonymous pages
*/
if (is_zero_pfn(pte_pfn(*pte)))
ptep_xchg_direct(walk->mm, addr, pte, __pte(_PAGE_INVALID));
/* Clear storage key */
ptep_zap_key(walk->mm, addr, pte);
return 0;

60
arch/s390/mm/init.c
View File

@ -26,6 +26,7 @@
#include <linux/poison.h>
#include <linux/initrd.h>
#include <linux/export.h>
#include <linux/cma.h>
#include <linux/gfp.h>
#include <linux/memblock.h>
#include <asm/processor.h>
@ -84,7 +85,7 @@ void __init paging_init(void)
psw_t psw;
init_mm.pgd = swapper_pg_dir;
if (VMALLOC_END > (1UL << 42)) {
if (VMALLOC_END > _REGION2_SIZE) {
asce_bits = _ASCE_TYPE_REGION2 | _ASCE_TABLE_LENGTH;
pgd_type = _REGION2_ENTRY_EMPTY;
} else {
@ -93,8 +94,7 @@ void __init paging_init(void)
}
init_mm.context.asce = (__pa(init_mm.pgd) & PAGE_MASK) | asce_bits;
S390_lowcore.kernel_asce = init_mm.context.asce;
clear_table((unsigned long *) init_mm.pgd, pgd_type,
sizeof(unsigned long)*2048);
crst_table_init((unsigned long *) init_mm.pgd, pgd_type);
vmem_map_init();
/* enable virtual mapping in kernel mode */
@ -137,6 +137,8 @@ void __init mem_init(void)
free_all_bootmem();
setup_zero_pages(); /* Setup zeroed pages. */
cmma_init_nodat();
mem_init_print_info(NULL);
}
@ -166,6 +168,58 @@ unsigned long memory_block_size_bytes(void)
}
#ifdef CONFIG_MEMORY_HOTPLUG
#ifdef CONFIG_CMA
/* Prevent memory blocks which contain cma regions from going offline */
struct s390_cma_mem_data {
unsigned long start;
unsigned long end;
};
static int s390_cma_check_range(struct cma *cma, void *data)
{
struct s390_cma_mem_data *mem_data;
unsigned long start, end;
mem_data = data;
start = cma_get_base(cma);
end = start + cma_get_size(cma);
if (end < mem_data->start)
return 0;
if (start >= mem_data->end)
return 0;
return -EBUSY;
}
static int s390_cma_mem_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
struct s390_cma_mem_data mem_data;
struct memory_notify *arg;
int rc = 0;
arg = data;
mem_data.start = arg->start_pfn << PAGE_SHIFT;
mem_data.end = mem_data.start + (arg->nr_pages << PAGE_SHIFT);
if (action == MEM_GOING_OFFLINE)
rc = cma_for_each_area(s390_cma_check_range, &mem_data);
return notifier_from_errno(rc);
}
static struct notifier_block s390_cma_mem_nb = {
.notifier_call = s390_cma_mem_notifier,
};
static int __init s390_cma_mem_init(void)
{
return register_memory_notifier(&s390_cma_mem_nb);
}
device_initcall(s390_cma_mem_init);
#endif /* CONFIG_CMA */
int arch_add_memory(int nid, u64 start, u64 size, bool want_memblock)
{
unsigned long start_pfn = PFN_DOWN(start);

196
arch/s390/mm/page-states.c
View File

@ -10,9 +10,10 @@
#include <linux/errno.h>
#include <linux/types.h>
#include <linux/mm.h>
#include <linux/memblock.h>
#include <linux/gfp.h>
#include <linux/init.h>
#include <asm/facility.h>
#include <asm/page-states.h>
static int cmma_flag = 1;
@ -36,14 +37,16 @@ __setup("cmma=", cmma);
static inline int cmma_test_essa(void)
{
register unsigned long tmp asm("0") = 0;
register int rc asm("1") = -EOPNOTSUPP;
register int rc asm("1");
/* test ESSA_GET_STATE */
asm volatile(
" .insn rrf,0xb9ab0000,%1,%1,0,0\n"
" .insn rrf,0xb9ab0000,%1,%1,%2,0\n"
"0: la %0,0\n"
"1:\n"
EX_TABLE(0b,1b)
: "+&d" (rc), "+&d" (tmp));
: "=&d" (rc), "+&d" (tmp)
: "i" (ESSA_GET_STATE), "0" (-EOPNOTSUPP));
return rc;
}
@ -51,11 +54,26 @@ void __init cmma_init(void)
{
if (!cmma_flag)
return;
if (cmma_test_essa())
if (cmma_test_essa()) {
cmma_flag = 0;
return;
}
if (test_facility(147))
cmma_flag = 2;
}
static inline void set_page_unstable(struct page *page, int order)
static inline unsigned char get_page_state(struct page *page)
{
unsigned char state;
asm volatile(" .insn rrf,0xb9ab0000,%0,%1,%2,0"
: "=&d" (state)
: "a" (page_to_phys(page)),
"i" (ESSA_GET_STATE));
return state & 0x3f;
}
static inline void set_page_unused(struct page *page, int order)
{
int i, rc;
@ -66,14 +84,7 @@ static inline void set_page_unstable(struct page *page, int order)
"i" (ESSA_SET_UNUSED));
}
void arch_free_page(struct page *page, int order)
{
if (!cmma_flag)
return;
set_page_unstable(page, order);
}
static inline void set_page_stable(struct page *page, int order)
static inline void set_page_stable_dat(struct page *page, int order)
{
int i, rc;
@ -84,11 +95,162 @@ static inline void set_page_stable(struct page *page, int order)
"i" (ESSA_SET_STABLE));
}
static inline void set_page_stable_nodat(struct page *page, int order)
{
int i, rc;
for (i = 0; i < (1 << order); i++)
asm volatile(".insn rrf,0xb9ab0000,%0,%1,%2,0"
: "=&d" (rc)
: "a" (page_to_phys(page + i)),
"i" (ESSA_SET_STABLE_NODAT));
}
static void mark_kernel_pmd(pud_t *pud, unsigned long addr, unsigned long end)
{
unsigned long next;
struct page *page;
pmd_t *pmd;
pmd = pmd_offset(pud, addr);
do {
next = pmd_addr_end(addr, end);
if (pmd_none(*pmd) || pmd_large(*pmd))
continue;
page = virt_to_page(pmd_val(*pmd));
set_bit(PG_arch_1, &page->flags);
} while (pmd++, addr = next, addr != end);
}
static void mark_kernel_pud(p4d_t *p4d, unsigned long addr, unsigned long end)
{
unsigned long next;
struct page *page;
pud_t *pud;
int i;
pud = pud_offset(p4d, addr);
do {
next = pud_addr_end(addr, end);
if (pud_none(*pud) || pud_large(*pud))
continue;
if (!pud_folded(*pud)) {
page = virt_to_page(pud_val(*pud));
for (i = 0; i < 3; i++)
set_bit(PG_arch_1, &page[i].flags);
}
mark_kernel_pmd(pud, addr, next);
} while (pud++, addr = next, addr != end);
}
static void mark_kernel_p4d(pgd_t *pgd, unsigned long addr, unsigned long end)
{
unsigned long next;
struct page *page;
p4d_t *p4d;
int i;
p4d = p4d_offset(pgd, addr);
do {
next = p4d_addr_end(addr, end);
if (p4d_none(*p4d))
continue;
if (!p4d_folded(*p4d)) {
page = virt_to_page(p4d_val(*p4d));
for (i = 0; i < 3; i++)
set_bit(PG_arch_1, &page[i].flags);
}
mark_kernel_pud(p4d, addr, next);
} while (p4d++, addr = next, addr != end);
}
static void mark_kernel_pgd(void)
{
unsigned long addr, next;
struct page *page;
pgd_t *pgd;
int i;
addr = 0;
pgd = pgd_offset_k(addr);
do {
next = pgd_addr_end(addr, MODULES_END);
if (pgd_none(*pgd))
continue;
if (!pgd_folded(*pgd)) {
page = virt_to_page(pgd_val(*pgd));
for (i = 0; i < 3; i++)
set_bit(PG_arch_1, &page[i].flags);
}
mark_kernel_p4d(pgd, addr, next);
} while (pgd++, addr = next, addr != MODULES_END);
}
void __init cmma_init_nodat(void)
{
struct memblock_region *reg;
struct page *page;
unsigned long start, end, ix;
if (cmma_flag < 2)
return;
/* Mark pages used in kernel page tables */
mark_kernel_pgd();
/* Set all kernel pages not used for page tables to stable/no-dat */
for_each_memblock(memory, reg) {
start = memblock_region_memory_base_pfn(reg);
end = memblock_region_memory_end_pfn(reg);
page = pfn_to_page(start);
for (ix = start; ix < end; ix++, page++) {
if (__test_and_clear_bit(PG_arch_1, &page->flags))
continue; /* skip page table pages */
if (!list_empty(&page->lru))
continue; /* skip free pages */
set_page_stable_nodat(page, 0);
}
}
}
void arch_free_page(struct page *page, int order)
{
if (!cmma_flag)
return;
set_page_unused(page, order);
}
void arch_alloc_page(struct page *page, int order)
{
if (!cmma_flag)
return;
set_page_stable(page, order);
if (cmma_flag < 2)
set_page_stable_dat(page, order);
else
set_page_stable_nodat(page, order);
}
void arch_set_page_dat(struct page *page, int order)
{
if (!cmma_flag)
return;
set_page_stable_dat(page, order);
}
void arch_set_page_nodat(struct page *page, int order)
{
if (cmma_flag < 2)
return;
set_page_stable_nodat(page, order);
}
int arch_test_page_nodat(struct page *page)
{
unsigned char state;
if (cmma_flag < 2)
return 0;
state = get_page_state(page);
return !!(state & 0x20);
}
void arch_set_page_states(int make_stable)
@ -108,9 +270,9 @@ void arch_set_page_states(int make_stable)
list_for_each(l, &zone->free_area[order].free_list[t]) {
page = list_entry(l, struct page, lru);
if (make_stable)
set_page_stable(page, order);
set_page_stable_dat(page, 0);
else
set_page_unstable(page, order);
set_page_unused(page, order);
}
}
spin_unlock_irqrestore(&zone->lock, flags);

5
arch/s390/mm/pageattr.c
View File

@ -7,6 +7,7 @@
#include <asm/cacheflush.h>
#include <asm/facility.h>
#include <asm/pgtable.h>
#include <asm/pgalloc.h>
#include <asm/page.h>
#include <asm/set_memory.h>
@ -191,7 +192,7 @@ static int split_pud_page(pud_t *pudp, unsigned long addr)
pud_t new;
int i, ro, nx;
pm_dir = vmem_pmd_alloc();
pm_dir = vmem_crst_alloc(_SEGMENT_ENTRY_EMPTY);
if (!pm_dir)
return -ENOMEM;
pmd_addr = pud_pfn(*pudp) << PAGE_SHIFT;
@ -328,7 +329,7 @@ static void ipte_range(pte_t *pte, unsigned long address, int nr)
return;
}
for (i = 0; i < nr; i++) {
__ptep_ipte(address, pte, IPTE_GLOBAL);
__ptep_ipte(address, pte, 0, 0, IPTE_GLOBAL);
address += PAGE_SIZE;
pte++;
}

12
arch/s390/mm/pgalloc.c
View File

@ -57,6 +57,7 @@ unsigned long *crst_table_alloc(struct mm_struct *mm)
if (!page)
return NULL;
arch_set_page_dat(page, 2);
return (unsigned long *) page_to_phys(page);
}
@ -82,7 +83,7 @@ int crst_table_upgrade(struct mm_struct *mm, unsigned long end)
int rc, notify;
/* upgrade should only happen from 3 to 4, 3 to 5, or 4 to 5 levels */
BUG_ON(mm->context.asce_limit < (1UL << 42));
BUG_ON(mm->context.asce_limit < _REGION2_SIZE);
if (end >= TASK_SIZE_MAX)
return -ENOMEM;
rc = 0;
@ -95,11 +96,11 @@ int crst_table_upgrade(struct mm_struct *mm, unsigned long end)
}
spin_lock_bh(&mm->page_table_lock);
pgd = (unsigned long *) mm->pgd;
if (mm->context.asce_limit == (1UL << 42)) {
if (mm->context.asce_limit == _REGION2_SIZE) {
crst_table_init(table, _REGION2_ENTRY_EMPTY);
p4d_populate(mm, (p4d_t *) table, (pud_t *) pgd);
mm->pgd = (pgd_t *) table;
mm->context.asce_limit = 1UL << 53;
mm->context.asce_limit = _REGION1_SIZE;
mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | _ASCE_TYPE_REGION2;
} else {
@ -123,7 +124,7 @@ void crst_table_downgrade(struct mm_struct *mm)
pgd_t *pgd;
/* downgrade should only happen from 3 to 2 levels (compat only) */
BUG_ON(mm->context.asce_limit != (1UL << 42));
BUG_ON(mm->context.asce_limit != _REGION2_SIZE);
if (current->active_mm == mm) {
clear_user_asce();
@ -132,7 +133,7 @@ void crst_table_downgrade(struct mm_struct *mm)
pgd = mm->pgd;
mm->pgd = (pgd_t *) (pgd_val(*pgd) & _REGION_ENTRY_ORIGIN);
mm->context.asce_limit = 1UL << 31;
mm->context.asce_limit = _REGION3_SIZE;
mm->context.asce = __pa(mm->pgd) | _ASCE_TABLE_LENGTH |
_ASCE_USER_BITS | _ASCE_TYPE_SEGMENT;
crst_table_free(mm, (unsigned long *) pgd);
@ -214,6 +215,7 @@ unsigned long *page_table_alloc(struct mm_struct *mm)
__free_page(page);
return NULL;
}
arch_set_page_dat(page, 0);
/* Initialize page table */
table = (unsigned long *) page_to_phys(page);
if (mm_alloc_pgste(mm)) {

154
arch/s390/mm/pgtable.c
View File

@ -25,8 +25,49 @@
#include <asm/mmu_context.h>
#include <asm/page-states.h>
static inline void ptep_ipte_local(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, int nodat)
{
unsigned long opt, asce;
if (MACHINE_HAS_TLB_GUEST) {
opt = 0;
asce = READ_ONCE(mm->context.gmap_asce);
if (asce == 0UL || nodat)
opt |= IPTE_NODAT;
if (asce != -1UL) {
asce = asce ? : mm->context.asce;
opt |= IPTE_GUEST_ASCE;
}
__ptep_ipte(addr, ptep, opt, asce, IPTE_LOCAL);
} else {
__ptep_ipte(addr, ptep, 0, 0, IPTE_LOCAL);
}
}
static inline void ptep_ipte_global(struct mm_struct *mm, unsigned long addr,
pte_t *ptep, int nodat)
{
unsigned long opt, asce;
if (MACHINE_HAS_TLB_GUEST) {
opt = 0;
asce = READ_ONCE(mm->context.gmap_asce);
if (asce == 0UL || nodat)
opt |= IPTE_NODAT;
if (asce != -1UL) {
asce = asce ? : mm->context.asce;
opt |= IPTE_GUEST_ASCE;
}
__ptep_ipte(addr, ptep, opt, asce, IPTE_GLOBAL);
} else {
__ptep_ipte(addr, ptep, 0, 0, IPTE_GLOBAL);
}
}
static inline pte_t ptep_flush_direct(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
unsigned long addr, pte_t *ptep,
int nodat)
{
pte_t old;
@ -36,15 +77,16 @@ static inline pte_t ptep_flush_direct(struct mm_struct *mm,
atomic_inc(&mm->context.flush_count);
if (MACHINE_HAS_TLB_LC &&
cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id())))
__ptep_ipte(addr, ptep, IPTE_LOCAL);
ptep_ipte_local(mm, addr, ptep, nodat);
else
__ptep_ipte(addr, ptep, IPTE_GLOBAL);
ptep_ipte_global(mm, addr, ptep, nodat);
atomic_dec(&mm->context.flush_count);
return old;
}
static inline pte_t ptep_flush_lazy(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
unsigned long addr, pte_t *ptep,
int nodat)
{
pte_t old;
@ -57,7 +99,7 @@ static inline pte_t ptep_flush_lazy(struct mm_struct *mm,
pte_val(*ptep) |= _PAGE_INVALID;
mm->context.flush_mm = 1;
} else
__ptep_ipte(addr, ptep, IPTE_GLOBAL);
ptep_ipte_global(mm, addr, ptep, nodat);
atomic_dec(&mm->context.flush_count);
return old;
}
@ -229,10 +271,12 @@ pte_t ptep_xchg_direct(struct mm_struct *mm, unsigned long addr,
{
pgste_t pgste;
pte_t old;
int nodat;
preempt_disable();
pgste = ptep_xchg_start(mm, addr, ptep);
old = ptep_flush_direct(mm, addr, ptep);
nodat = !!(pgste_val(pgste) & _PGSTE_GPS_NODAT);
old = ptep_flush_direct(mm, addr, ptep, nodat);
old = ptep_xchg_commit(mm, addr, ptep, pgste, old, new);
preempt_enable();
return old;
@ -244,10 +288,12 @@ pte_t ptep_xchg_lazy(struct mm_struct *mm, unsigned long addr,
{
pgste_t pgste;
pte_t old;
int nodat;
preempt_disable();
pgste = ptep_xchg_start(mm, addr, ptep);
old = ptep_flush_lazy(mm, addr, ptep);
nodat = !!(pgste_val(pgste) & _PGSTE_GPS_NODAT);
old = ptep_flush_lazy(mm, addr, ptep, nodat);
old = ptep_xchg_commit(mm, addr, ptep, pgste, old, new);
preempt_enable();
return old;
@ -259,10 +305,12 @@ pte_t ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr,
{
pgste_t pgste;
pte_t old;
int nodat;
preempt_disable();
pgste = ptep_xchg_start(mm, addr, ptep);
old = ptep_flush_lazy(mm, addr, ptep);
nodat = !!(pgste_val(pgste) & _PGSTE_GPS_NODAT);
old = ptep_flush_lazy(mm, addr, ptep, nodat);
if (mm_has_pgste(mm)) {
pgste = pgste_update_all(old, pgste, mm);
pgste_set(ptep, pgste);
@ -290,6 +338,28 @@ void ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr,
}
EXPORT_SYMBOL(ptep_modify_prot_commit);
static inline void pmdp_idte_local(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp)
{
if (MACHINE_HAS_TLB_GUEST)
__pmdp_idte(addr, pmdp, IDTE_NODAT | IDTE_GUEST_ASCE,
mm->context.asce, IDTE_LOCAL);
else
__pmdp_idte(addr, pmdp, 0, 0, IDTE_LOCAL);
}
static inline void pmdp_idte_global(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp)
{
if (MACHINE_HAS_TLB_GUEST)
__pmdp_idte(addr, pmdp, IDTE_NODAT | IDTE_GUEST_ASCE,
mm->context.asce, IDTE_GLOBAL);
else if (MACHINE_HAS_IDTE)
__pmdp_idte(addr, pmdp, 0, 0, IDTE_GLOBAL);
else
__pmdp_csp(pmdp);
}
static inline pmd_t pmdp_flush_direct(struct mm_struct *mm,
unsigned long addr, pmd_t *pmdp)
{
@ -298,16 +368,12 @@ static inline pmd_t pmdp_flush_direct(struct mm_struct *mm,
old = *pmdp;
if (pmd_val(old) & _SEGMENT_ENTRY_INVALID)
return old;
if (!MACHINE_HAS_IDTE) {
__pmdp_csp(pmdp);
return old;
}
atomic_inc(&mm->context.flush_count);
if (MACHINE_HAS_TLB_LC &&
cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id())))
__pmdp_idte(addr, pmdp, IDTE_LOCAL);
pmdp_idte_local(mm, addr, pmdp);
else
__pmdp_idte(addr, pmdp, IDTE_GLOBAL);
pmdp_idte_global(mm, addr, pmdp);
atomic_dec(&mm->context.flush_count);
return old;
}
@ -325,10 +391,9 @@ static inline pmd_t pmdp_flush_lazy(struct mm_struct *mm,
cpumask_of(smp_processor_id()))) {
pmd_val(*pmdp) |= _SEGMENT_ENTRY_INVALID;
mm->context.flush_mm = 1;
} else if (MACHINE_HAS_IDTE)
__pmdp_idte(addr, pmdp, IDTE_GLOBAL);
else
__pmdp_csp(pmdp);
} else {
pmdp_idte_global(mm, addr, pmdp);
}
atomic_dec(&mm->context.flush_count);
return old;
}
@ -359,6 +424,32 @@ pmd_t pmdp_xchg_lazy(struct mm_struct *mm, unsigned long addr,
}
EXPORT_SYMBOL(pmdp_xchg_lazy);
static inline void pudp_idte_local(struct mm_struct *mm,
unsigned long addr, pud_t *pudp)
{
if (MACHINE_HAS_TLB_GUEST)
__pudp_idte(addr, pudp, IDTE_NODAT | IDTE_GUEST_ASCE,
mm->context.asce, IDTE_LOCAL);
else
__pudp_idte(addr, pudp, 0, 0, IDTE_LOCAL);
}
static inline void pudp_idte_global(struct mm_struct *mm,
unsigned long addr, pud_t *pudp)
{
if (MACHINE_HAS_TLB_GUEST)
__pudp_idte(addr, pudp, IDTE_NODAT | IDTE_GUEST_ASCE,
mm->context.asce, IDTE_GLOBAL);
else if (MACHINE_HAS_IDTE)
__pudp_idte(addr, pudp, 0, 0, IDTE_GLOBAL);
else
/*
* Invalid bit position is the same for pmd and pud, so we can
* re-use _pmd_csp() here
*/
__pmdp_csp((pmd_t *) pudp);
}
static inline pud_t pudp_flush_direct(struct mm_struct *mm,
unsigned long addr, pud_t *pudp)
{
@ -367,20 +458,12 @@ static inline pud_t pudp_flush_direct(struct mm_struct *mm,
old = *pudp;
if (pud_val(old) & _REGION_ENTRY_INVALID)
return old;
if (!MACHINE_HAS_IDTE) {
/*
* Invalid bit position is the same for pmd and pud, so we can
* re-use _pmd_csp() here
*/
__pmdp_csp((pmd_t *) pudp);
return old;
}
atomic_inc(&mm->context.flush_count);
if (MACHINE_HAS_TLB_LC &&
cpumask_equal(mm_cpumask(mm), cpumask_of(smp_processor_id())))
__pudp_idte(addr, pudp, IDTE_LOCAL);
pudp_idte_local(mm, addr, pudp);
else
__pudp_idte(addr, pudp, IDTE_GLOBAL);
pudp_idte_global(mm, addr, pudp);
atomic_dec(&mm->context.flush_count);
return old;
}
@ -482,7 +565,7 @@ int ptep_force_prot(struct mm_struct *mm, unsigned long addr,
{
pte_t entry;
pgste_t pgste;
int pte_i, pte_p;
int pte_i, pte_p, nodat;
pgste = pgste_get_lock(ptep);
entry = *ptep;
@ -495,13 +578,14 @@ int ptep_force_prot(struct mm_struct *mm, unsigned long addr,
return -EAGAIN;
}
/* Change access rights and set pgste bit */
nodat = !!(pgste_val(pgste) & _PGSTE_GPS_NODAT);
if (prot == PROT_NONE && !pte_i) {
ptep_flush_direct(mm, addr, ptep);
ptep_flush_direct(mm, addr, ptep, nodat);
pgste = pgste_update_all(entry, pgste, mm);
pte_val(entry) |= _PAGE_INVALID;
}
if (prot == PROT_READ && !pte_p) {
ptep_flush_direct(mm, addr, ptep);
ptep_flush_direct(mm, addr, ptep, nodat);
pte_val(entry) &= ~_PAGE_INVALID;
pte_val(entry) |= _PAGE_PROTECT;
}
@ -541,10 +625,12 @@ int ptep_shadow_pte(struct mm_struct *mm, unsigned long saddr,
void ptep_unshadow_pte(struct mm_struct *mm, unsigned long saddr, pte_t *ptep)
{
pgste_t pgste;
int nodat;
pgste = pgste_get_lock(ptep);
/* notifier is called by the caller */
ptep_flush_direct(mm, saddr, ptep);
nodat = !!(pgste_val(pgste) & _PGSTE_GPS_NODAT);
ptep_flush_direct(mm, saddr, ptep, nodat);
/* don't touch the storage key - it belongs to parent pgste */
pgste = pgste_set_pte(ptep, pgste, __pte(_PAGE_INVALID));
pgste_set_unlock(ptep, pgste);
@ -617,6 +703,7 @@ bool test_and_clear_guest_dirty(struct mm_struct *mm, unsigned long addr)
pte_t *ptep;
pte_t pte;
bool dirty;
int nodat;
pgd = pgd_offset(mm, addr);
p4d = p4d_alloc(mm, pgd, addr);
@ -645,7 +732,8 @@ bool test_and_clear_guest_dirty(struct mm_struct *mm, unsigned long addr)
pte = *ptep;
if (dirty && (pte_val(pte) & _PAGE_PRESENT)) {
pgste = pgste_pte_notify(mm, addr, ptep, pgste);
__ptep_ipte(addr, ptep, IPTE_GLOBAL);
nodat = !!(pgste_val(pgste) & _PGSTE_GPS_NODAT);
ptep_ipte_global(mm, addr, ptep, nodat);
if (MACHINE_HAS_ESOP || !(pte_val(pte) & _PAGE_WRITE))
pte_val(pte) |= _PAGE_PROTECT;
else

47
arch/s390/mm/vmem.c
View File

@ -38,37 +38,14 @@ static void __ref *vmem_alloc_pages(unsigned int order)
return (void *) memblock_alloc(size, size);
}
static inline p4d_t *vmem_p4d_alloc(void)
void *vmem_crst_alloc(unsigned long val)
{
p4d_t *p4d = NULL;
unsigned long *table;
p4d = vmem_alloc_pages(2);
if (!p4d)
return NULL;
clear_table((unsigned long *) p4d, _REGION2_ENTRY_EMPTY, PAGE_SIZE * 4);
return p4d;
}
static inline pud_t *vmem_pud_alloc(void)
{
pud_t *pud = NULL;
pud = vmem_alloc_pages(2);
if (!pud)
return NULL;
clear_table((unsigned long *) pud, _REGION3_ENTRY_EMPTY, PAGE_SIZE * 4);
return pud;
}
pmd_t *vmem_pmd_alloc(void)
{
pmd_t *pmd = NULL;
pmd = vmem_alloc_pages(2);
if (!pmd)
return NULL;
clear_table((unsigned long *) pmd, _SEGMENT_ENTRY_EMPTY, PAGE_SIZE * 4);
return pmd;
table = vmem_alloc_pages(CRST_ALLOC_ORDER);
if (table)
crst_table_init(table, val);
return table;
}
pte_t __ref *vmem_pte_alloc(void)
@ -114,14 +91,14 @@ static int vmem_add_mem(unsigned long start, unsigned long size)
while (address < end) {
pg_dir = pgd_offset_k(address);
if (pgd_none(*pg_dir)) {
p4_dir = vmem_p4d_alloc();
p4_dir = vmem_crst_alloc(_REGION2_ENTRY_EMPTY);
if (!p4_dir)
goto out;
pgd_populate(&init_mm, pg_dir, p4_dir);
}
p4_dir = p4d_offset(pg_dir, address);
if (p4d_none(*p4_dir)) {
pu_dir = vmem_pud_alloc();
pu_dir = vmem_crst_alloc(_REGION3_ENTRY_EMPTY);
if (!pu_dir)
goto out;
p4d_populate(&init_mm, p4_dir, pu_dir);
@ -136,7 +113,7 @@ static int vmem_add_mem(unsigned long start, unsigned long size)
continue;
}
if (pud_none(*pu_dir)) {
pm_dir = vmem_pmd_alloc();
pm_dir = vmem_crst_alloc(_SEGMENT_ENTRY_EMPTY);
if (!pm_dir)
goto out;
pud_populate(&init_mm, pu_dir, pm_dir);
@ -253,7 +230,7 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node)
for (address = start; address < end;) {
pg_dir = pgd_offset_k(address);
if (pgd_none(*pg_dir)) {
p4_dir = vmem_p4d_alloc();
p4_dir = vmem_crst_alloc(_REGION2_ENTRY_EMPTY);
if (!p4_dir)
goto out;
pgd_populate(&init_mm, pg_dir, p4_dir);
@ -261,7 +238,7 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node)
p4_dir = p4d_offset(pg_dir, address);
if (p4d_none(*p4_dir)) {
pu_dir = vmem_pud_alloc();
pu_dir = vmem_crst_alloc(_REGION3_ENTRY_EMPTY);
if (!pu_dir)
goto out;
p4d_populate(&init_mm, p4_dir, pu_dir);
@ -269,7 +246,7 @@ int __meminit vmemmap_populate(unsigned long start, unsigned long end, int node)
pu_dir = pud_offset(p4_dir, address);
if (pud_none(*pu_dir)) {
pm_dir = vmem_pmd_alloc();
pm_dir = vmem_crst_alloc(_SEGMENT_ENTRY_EMPTY);
if (!pm_dir)
goto out;
pud_populate(&init_mm, pu_dir, pm_dir);

10
arch/s390/pci/pci_clp.c
View File

@ -24,6 +24,14 @@
bool zpci_unique_uid;
static void update_uid_checking(bool new)
{
if (zpci_unique_uid != new)
zpci_dbg(1, "uid checking:%d\n", new);
zpci_unique_uid = new;
}
static inline void zpci_err_clp(unsigned int rsp, int rc)
{
struct {
@ -319,7 +327,7 @@ static int clp_list_pci(struct clp_req_rsp_list_pci *rrb, void *data,
goto out;
}
zpci_unique_uid = rrb->response.uid_checking;
update_uid_checking(rrb->response.uid_checking);
WARN_ON_ONCE(rrb->response.entry_size !=
sizeof(struct clp_fh_list_entry));

5
arch/s390/tools/gen_facilities.c
View File

@ -41,7 +41,7 @@ static struct facility_def facility_defs[] = {
27, /* mvcos */
32, /* compare and swap and store */
33, /* compare and swap and store 2 */
34, /* general extension facility */
34, /* general instructions extension */
35, /* execute extensions */
#endif
#ifdef CONFIG_HAVE_MARCH_Z196_FEATURES
@ -53,6 +53,9 @@ static struct facility_def facility_defs[] = {
#endif
#ifdef CONFIG_HAVE_MARCH_Z13_FEATURES
53, /* load-and-zero-rightmost-byte, etc. */
#endif
#ifdef CONFIG_HAVE_MARCH_Z14_FEATURES
58, /* miscellaneous-instruction-extension 2 */
#endif
-1 /* END */
}

55
drivers/s390/block/dasd.c
View File

@ -801,11 +801,12 @@ static void dasd_profile_end(struct dasd_block *block,
struct dasd_ccw_req *cqr,
struct request *req)
{
long strtime, irqtime, endtime, tottime; /* in microseconds */
long tottimeps, sectors;
unsigned long strtime, irqtime, endtime, tottime;
unsigned long tottimeps, sectors;
struct dasd_device *device;
int sectors_ind, tottime_ind, tottimeps_ind, strtime_ind;
int irqtime_ind, irqtimeps_ind, endtime_ind;
struct dasd_profile_info *data;
device = cqr->startdev;
if (!(dasd_global_profile_level ||
@ -835,6 +836,11 @@ static void dasd_profile_end(struct dasd_block *block,
spin_lock(&dasd_global_profile.lock);
if (dasd_global_profile.data) {
data = dasd_global_profile.data;
data->dasd_sum_times += tottime;
data->dasd_sum_time_str += strtime;
data->dasd_sum_time_irq += irqtime;
data->dasd_sum_time_end += endtime;
dasd_profile_end_add_data(dasd_global_profile.data,
cqr->startdev != block->base,
cqr->cpmode == 1,
@ -847,7 +853,12 @@ static void dasd_profile_end(struct dasd_block *block,
spin_unlock(&dasd_global_profile.lock);
spin_lock(&block->profile.lock);
if (block->profile.data)
if (block->profile.data) {
data = block->profile.data;
data->dasd_sum_times += tottime;
data->dasd_sum_time_str += strtime;
data->dasd_sum_time_irq += irqtime;
data->dasd_sum_time_end += endtime;
dasd_profile_end_add_data(block->profile.data,
cqr->startdev != block->base,
cqr->cpmode == 1,
@ -856,10 +867,16 @@ static void dasd_profile_end(struct dasd_block *block,
tottimeps_ind, strtime_ind,
irqtime_ind, irqtimeps_ind,
endtime_ind);
}
spin_unlock(&block->profile.lock);
spin_lock(&device->profile.lock);
if (device->profile.data)
if (device->profile.data) {
data = device->profile.data;
data->dasd_sum_times += tottime;
data->dasd_sum_time_str += strtime;
data->dasd_sum_time_irq += irqtime;
data->dasd_sum_time_end += endtime;
dasd_profile_end_add_data(device->profile.data,
cqr->startdev != block->base,
cqr->cpmode == 1,
@ -868,6 +885,7 @@ static void dasd_profile_end(struct dasd_block *block,
tottimeps_ind, strtime_ind,
irqtime_ind, irqtimeps_ind,
endtime_ind);
}
spin_unlock(&device->profile.lock);
}
@ -989,6 +1007,14 @@ static void dasd_stats_seq_print(struct seq_file *m,
seq_printf(m, "total_sectors %u\n", data->dasd_io_sects);
seq_printf(m, "total_pav %u\n", data->dasd_io_alias);
seq_printf(m, "total_hpf %u\n", data->dasd_io_tpm);
seq_printf(m, "avg_total %lu\n", data->dasd_io_reqs ?
data->dasd_sum_times / data->dasd_io_reqs : 0UL);
seq_printf(m, "avg_build_to_ssch %lu\n", data->dasd_io_reqs ?
data->dasd_sum_time_str / data->dasd_io_reqs : 0UL);
seq_printf(m, "avg_ssch_to_irq %lu\n", data->dasd_io_reqs ?
data->dasd_sum_time_irq / data->dasd_io_reqs : 0UL);
seq_printf(m, "avg_irq_to_end %lu\n", data->dasd_io_reqs ?
data->dasd_sum_time_end / data->dasd_io_reqs : 0UL);
seq_puts(m, "histogram_sectors ");
dasd_stats_array(m, data->dasd_io_secs);
seq_puts(m, "histogram_io_times ");
@ -1639,7 +1665,7 @@ void dasd_int_handler(struct ccw_device *cdev, unsigned long intparm,
{
struct dasd_ccw_req *cqr, *next;
struct dasd_device *device;
unsigned long long now;
unsigned long now;
int nrf_suppressed = 0;
int fp_suppressed = 0;
u8 *sense = NULL;
@ -3152,7 +3178,9 @@ static int dasd_alloc_queue(struct dasd_block *block)
*/
static void dasd_setup_queue(struct dasd_block *block)
{
unsigned int logical_block_size = block->bp_block;
struct request_queue *q = block->request_queue;
unsigned int max_bytes, max_discard_sectors;
int max;
if (block->base->features & DASD_FEATURE_USERAW) {
@ -3169,7 +3197,7 @@ static void dasd_setup_queue(struct dasd_block *block)
}
queue_flag_set_unlocked(QUEUE_FLAG_NONROT, q);
q->limits.max_dev_sectors = max;
blk_queue_logical_block_size(q, block->bp_block);
blk_queue_logical_block_size(q, logical_block_size);
blk_queue_max_hw_sectors(q, max);
blk_queue_max_segments(q, USHRT_MAX);
/* with page sized segments we can translate each segement into
@ -3177,6 +3205,21 @@ static void dasd_setup_queue(struct dasd_block *block)
*/
blk_queue_max_segment_size(q, PAGE_SIZE);
blk_queue_segment_boundary(q, PAGE_SIZE - 1);
/* Only activate blocklayer discard support for devices that support it */
if (block->base->features & DASD_FEATURE_DISCARD) {
q->limits.discard_granularity = logical_block_size;
q->limits.discard_alignment = PAGE_SIZE;
/* Calculate max_discard_sectors and make it PAGE aligned */
max_bytes = USHRT_MAX * logical_block_size;
max_bytes = ALIGN(max_bytes, PAGE_SIZE) - PAGE_SIZE;
max_discard_sectors = max_bytes / logical_block_size;
blk_queue_max_discard_sectors(q, max_discard_sectors);
blk_queue_max_write_zeroes_sectors(q, max_discard_sectors);
queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, q);
}
}
/*

2
drivers/s390/block/dasd_3990_erp.c
View File

@ -2231,7 +2231,7 @@ static void dasd_3990_erp_account_error(struct dasd_ccw_req *erp)
struct dasd_device *device = erp->startdev;
__u8 lpum = erp->refers->irb.esw.esw1.lpum;
int pos = pathmask_to_pos(lpum);
unsigned long long clk;
unsigned long clk;
if (!device->path_thrhld)
return;

3
drivers/s390/block/dasd_devmap.c
View File

@ -1634,7 +1634,7 @@ static struct attribute * dasd_attrs[] = {
NULL,
};
static struct attribute_group dasd_attr_group = {
static const struct attribute_group dasd_attr_group = {
.attrs = dasd_attrs,
};
@ -1676,6 +1676,7 @@ dasd_set_feature(struct ccw_device *cdev, int feature, int flag)
spin_unlock(&dasd_devmap_lock);
return 0;
}
EXPORT_SYMBOL(dasd_set_feature);
int

2
drivers/s390/block/dasd_diag.c
View File

@ -235,7 +235,7 @@ static void dasd_ext_handler(struct ext_code ext_code,
{
struct dasd_ccw_req *cqr, *next;
struct dasd_device *device;
unsigned long long expires;
unsigned long expires;
unsigned long flags;
addr_t ip;
int rc;

8
drivers/s390/block/dasd_eckd.c
View File

@ -3254,11 +3254,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_cmd_track(
/* 1x prefix + one read/write ccw per track */
cplength = 1 + trkcount;
/* on 31-bit we need space for two 32 bit addresses per page
* on 64-bit one 64 bit address
*/
datasize = sizeof(struct PFX_eckd_data) +
cidaw * sizeof(unsigned long long);
datasize = sizeof(struct PFX_eckd_data) + cidaw * sizeof(unsigned long);
/* Allocate the ccw request. */
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength, datasize,
@ -3856,7 +3852,7 @@ static struct dasd_ccw_req *dasd_eckd_build_cp_raw(struct dasd_device *startdev,
}
size = ALIGN(size, 8);
datasize = size + cidaw * sizeof(unsigned long long);
datasize = size + cidaw * sizeof(unsigned long);
/* Allocate the ccw request. */
cqr = dasd_smalloc_request(DASD_ECKD_MAGIC, cplength,

2
drivers/s390/block/dasd_eckd.h
View File

@ -165,7 +165,7 @@ struct DE_eckd_data {
__u8 ga_extended; /* Global Attributes Extended */
struct ch_t beg_ext;
struct ch_t end_ext;
unsigned long long ep_sys_time; /* Ext Parameter - System Time Stamp */
unsigned long ep_sys_time; /* Ext Parameter - System Time Stamp */
__u8 ep_format; /* Extended Parameter format byte */
__u8 ep_prio; /* Extended Parameter priority I/O byte */
__u8 ep_reserved1; /* Extended Parameter Reserved */

2
drivers/s390/block/dasd_erp.c
View File

@ -124,7 +124,7 @@ dasd_default_erp_action(struct dasd_ccw_req *cqr)
struct dasd_ccw_req *dasd_default_erp_postaction(struct dasd_ccw_req *cqr)
{
int success;
unsigned long long startclk, stopclk;
unsigned long startclk, stopclk;
struct dasd_device *startdev;
BUG_ON(cqr->refers == NULL || cqr->function == NULL);

198
drivers/s390/block/dasd_fba.c
View File

@ -174,6 +174,9 @@ dasd_fba_check_characteristics(struct dasd_device *device)
if (readonly)
set_bit(DASD_FLAG_DEVICE_RO, &device->flags);
/* FBA supports discard, set the according feature bit */
dasd_set_feature(cdev, DASD_FEATURE_DISCARD, 1);
dev_info(&device->cdev->dev,
"New FBA DASD %04X/%02X (CU %04X/%02X) with %d MB "
"and %d B/blk%s\n",
@ -247,7 +250,190 @@ static void dasd_fba_check_for_device_change(struct dasd_device *device,
dasd_generic_handle_state_change(device);
};
static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
/*
* Builds a CCW with no data payload
*/
static void ccw_write_no_data(struct ccw1 *ccw)
{
ccw->cmd_code = DASD_FBA_CCW_WRITE;
ccw->flags |= CCW_FLAG_SLI;
ccw->count = 0;
}
/*
* Builds a CCW that writes only zeroes.
*/
static void ccw_write_zero(struct ccw1 *ccw, int count)
{
ccw->cmd_code = DASD_FBA_CCW_WRITE;
ccw->flags |= CCW_FLAG_SLI;
ccw->count = count;
ccw->cda = (__u32) (addr_t) page_to_phys(ZERO_PAGE(0));
}
/*
* Helper function to count the amount of necessary CCWs within a given range
* with 4k alignment and command chaining in mind.
*/
static int count_ccws(sector_t first_rec, sector_t last_rec,
unsigned int blocks_per_page)
{
sector_t wz_stop = 0, d_stop = 0;
int cur_pos = 0;
int count = 0;
if (first_rec % blocks_per_page != 0) {
wz_stop = first_rec + blocks_per_page -
(first_rec % blocks_per_page) - 1;
if (wz_stop > last_rec)
wz_stop = last_rec;
cur_pos = wz_stop - first_rec + 1;
count++;
}
if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) {
if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0)
d_stop = last_rec - ((last_rec - blocks_per_page + 1) %
blocks_per_page);
else
d_stop = last_rec;
cur_pos += d_stop - (first_rec + cur_pos) + 1;
count++;
}
if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec)
count++;
return count;
}
/*
* This function builds a CCW request for block layer discard requests.
* Each page in the z/VM hypervisor that represents certain records of an FBA
* device will be padded with zeros. This is a special behaviour of the WRITE
* command which is triggered when no data payload is added to the CCW.
*
* Note: Due to issues in some z/VM versions, we can't fully utilise this
* special behaviour. We have to keep a 4k (or 8 block) alignment in mind to
* work around those issues and write actual zeroes to the unaligned parts in
* the request. This workaround might be removed in the future.
*/
static struct dasd_ccw_req *dasd_fba_build_cp_discard(
struct dasd_device *memdev,
struct dasd_block *block,
struct request *req)
{
struct LO_fba_data *LO_data;
struct dasd_ccw_req *cqr;
struct ccw1 *ccw;
sector_t wz_stop = 0, d_stop = 0;
sector_t first_rec, last_rec;
unsigned int blksize = block->bp_block;
unsigned int blocks_per_page;
int wz_count = 0;
int d_count = 0;
int cur_pos = 0; /* Current position within the extent */
int count = 0;
int cplength;
int datasize;
int nr_ccws;
first_rec = blk_rq_pos(req) >> block->s2b_shift;
last_rec =
(blk_rq_pos(req) + blk_rq_sectors(req) - 1) >> block->s2b_shift;
count = last_rec - first_rec + 1;
blocks_per_page = BLOCKS_PER_PAGE(blksize);
nr_ccws = count_ccws(first_rec, last_rec, blocks_per_page);
/* define extent + nr_ccws * locate record + nr_ccws * single CCW */
cplength = 1 + 2 * nr_ccws;
datasize = sizeof(struct DE_fba_data) +
nr_ccws * (sizeof(struct LO_fba_data) + sizeof(struct ccw1));
cqr = dasd_smalloc_request(DASD_FBA_MAGIC, cplength, datasize, memdev);
if (IS_ERR(cqr))
return cqr;
ccw = cqr->cpaddr;
define_extent(ccw++, cqr->data, WRITE, blksize, first_rec, count);
LO_data = cqr->data + sizeof(struct DE_fba_data);
/* First part is not aligned. Calculate range to write zeroes. */
if (first_rec % blocks_per_page != 0) {
wz_stop = first_rec + blocks_per_page -
(first_rec % blocks_per_page) - 1;
if (wz_stop > last_rec)
wz_stop = last_rec;
wz_count = wz_stop - first_rec + 1;
ccw[-1].flags |= CCW_FLAG_CC;
locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count);
ccw[-1].flags |= CCW_FLAG_CC;
ccw_write_zero(ccw++, wz_count * blksize);
cur_pos = wz_count;
}
/* We can do proper discard when we've got at least blocks_per_page blocks. */
if (last_rec - (first_rec + cur_pos) + 1 >= blocks_per_page) {
/* is last record at page boundary? */
if ((last_rec - blocks_per_page + 1) % blocks_per_page != 0)
d_stop = last_rec - ((last_rec - blocks_per_page + 1) %
blocks_per_page);
else
d_stop = last_rec;
d_count = d_stop - (first_rec + cur_pos) + 1;
ccw[-1].flags |= CCW_FLAG_CC;
locate_record(ccw++, LO_data++, WRITE, cur_pos, d_count);
ccw[-1].flags |= CCW_FLAG_CC;
ccw_write_no_data(ccw++);
cur_pos += d_count;
}
/* We might still have some bits left which need to be zeroed. */
if (cur_pos == 0 || first_rec + cur_pos - 1 < last_rec) {
if (d_stop != 0)
wz_count = last_rec - d_stop;
else if (wz_stop != 0)
wz_count = last_rec - wz_stop;
else
wz_count = count;
ccw[-1].flags |= CCW_FLAG_CC;
locate_record(ccw++, LO_data++, WRITE, cur_pos, wz_count);
ccw[-1].flags |= CCW_FLAG_CC;
ccw_write_zero(ccw++, wz_count * blksize);
}
if (blk_noretry_request(req) ||
block->base->features & DASD_FEATURE_FAILFAST)
set_bit(DASD_CQR_FLAGS_FAILFAST, &cqr->flags);
cqr->startdev = memdev;
cqr->memdev = memdev;
cqr->block = block;
cqr->expires = memdev->default_expires * HZ; /* default 5 minutes */
cqr->retries = memdev->default_retries;
cqr->buildclk = get_tod_clock();
cqr->status = DASD_CQR_FILLED;
return cqr;
}
static struct dasd_ccw_req *dasd_fba_build_cp_regular(
struct dasd_device *memdev,
struct dasd_block *block,
struct request *req)
{
@ -372,6 +558,16 @@ static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device * memdev,
return cqr;
}
static struct dasd_ccw_req *dasd_fba_build_cp(struct dasd_device *memdev,
struct dasd_block *block,
struct request *req)
{
if (req_op(req) == REQ_OP_DISCARD || req_op(req) == REQ_OP_WRITE_ZEROES)
return dasd_fba_build_cp_discard(memdev, block, req);
else
return dasd_fba_build_cp_regular(memdev, block, req);
}
static int
dasd_fba_free_cp(struct dasd_ccw_req *cqr, struct request *req)
{

19
drivers/s390/block/dasd_int.h
View File

@ -167,6 +167,9 @@ do { \
printk(d_loglevel PRINTK_HEADER " " d_string "\n", d_args); \
} while(0)
/* Macro to calculate number of blocks per page */
#define BLOCKS_PER_PAGE(blksize) (PAGE_SIZE / blksize)
struct dasd_ccw_req {
unsigned int magic; /* Eye catcher */
struct list_head devlist; /* for dasd_device request queue */
@ -196,10 +199,10 @@ struct dasd_ccw_req {
void *function; /* originating ERP action */
/* these are for statistics only */
unsigned long long buildclk; /* TOD-clock of request generation */
unsigned long long startclk; /* TOD-clock of request start */
unsigned long long stopclk; /* TOD-clock of request interrupt */
unsigned long long endclk; /* TOD-clock of request termination */
unsigned long buildclk; /* TOD-clock of request generation */
unsigned long startclk; /* TOD-clock of request start */
unsigned long stopclk; /* TOD-clock of request interrupt */
unsigned long endclk; /* TOD-clock of request termination */
/* Callback that is called after reaching final status. */
void (*callback)(struct dasd_ccw_req *, void *data);
@ -423,7 +426,7 @@ struct dasd_path {
u8 chpid;
struct dasd_conf_data *conf_data;
atomic_t error_count;
unsigned long long errorclk;
unsigned long errorclk;
};
@ -454,6 +457,10 @@ struct dasd_profile_info {
unsigned int dasd_read_time2[32]; /* hist. of time from start to irq */
unsigned int dasd_read_time3[32]; /* hist. of time from irq to end */
unsigned int dasd_read_nr_req[32]; /* hist. of # of requests in chanq */
unsigned long dasd_sum_times; /* sum of request times */
unsigned long dasd_sum_time_str; /* sum of time from build to start */
unsigned long dasd_sum_time_irq; /* sum of time from start to irq */
unsigned long dasd_sum_time_end; /* sum of time from irq to end */
};
struct dasd_profile {
@ -535,7 +542,7 @@ struct dasd_block {
struct block_device *bdev;
atomic_t open_count;
unsigned long long blocks; /* size of volume in blocks */
unsigned long blocks; /* size of volume in blocks */
unsigned int bp_block; /* bytes per block */
unsigned int s2b_shift; /* log2 (bp_block/512) */

2
drivers/s390/block/dasd_proc.c
View File

@ -90,7 +90,7 @@ dasd_devices_show(struct seq_file *m, void *v)
seq_printf(m, "n/f ");
else
seq_printf(m,
"at blocksize: %d, %lld blocks, %lld MB",
"at blocksize: %u, %lu blocks, %lu MB",
block->bp_block, block->blocks,
((block->bp_block >> 9) *
block->blocks) >> 11);

11
drivers/s390/block/scm_blk.c
View File

@ -249,12 +249,12 @@ static void scm_request_requeue(struct scm_request *scmrq)
static void scm_request_finish(struct scm_request *scmrq)
{
struct scm_blk_dev *bdev = scmrq->bdev;
int *error;
int i;
for (i = 0; i < nr_requests_per_io && scmrq->request[i]; i++) {
if (scmrq->error)
blk_mq_end_request(scmrq->request[i], scmrq->error);
else
error = blk_mq_rq_to_pdu(scmrq->request[i]);
*error = scmrq->error;
blk_mq_complete_request(scmrq->request[i]);
}
@ -415,7 +415,9 @@ void scm_blk_irq(struct scm_device *scmdev, void *data, blk_status_t error)
static void scm_blk_request_done(struct request *req)
{
blk_mq_end_request(req, 0);
int *error = blk_mq_rq_to_pdu(req);
blk_mq_end_request(req, *error);
}
static const struct block_device_operations scm_blk_devops = {
@ -448,6 +450,7 @@ int scm_blk_dev_setup(struct scm_blk_dev *bdev, struct scm_device *scmdev)
atomic_set(&bdev->queued_reqs, 0);
bdev->tag_set.ops = &scm_mq_ops;
bdev->tag_set.cmd_size = sizeof(int);
bdev->tag_set.nr_hw_queues = nr_requests;
bdev->tag_set.queue_depth = nr_requests_per_io * nr_requests;
bdev->tag_set.flags = BLK_MQ_F_SHOULD_MERGE;

11
drivers/s390/char/Kconfig
View File

@ -169,10 +169,21 @@ config VMCP
def_bool y
prompt "Support for the z/VM CP interface"
depends on S390
select CMA
help
Select this option if you want to be able to interact with the control
program on z/VM
config VMCP_CMA_SIZE
int "Memory in MiB reserved for z/VM CP interface"
default "4"
depends on VMCP
help
Specify the default amount of memory in MiB reserved for the z/VM CP
interface. If needed this memory is used for large contiguous memory
allocations. The default can be changed with the kernel command line
parameter "vmcp_cma".
config MONREADER
def_tristate m
prompt "API for reading z/VM monitor service records"

2
drivers/s390/char/raw3270.c
View File

@ -1082,7 +1082,7 @@ static struct attribute * raw3270_attrs[] = {
NULL,
};
static struct attribute_group raw3270_attr_group = {
static const struct attribute_group raw3270_attr_group = {
.attrs = raw3270_attrs,
};

1
drivers/s390/char/sclp_cmd.c
View File

@ -252,6 +252,7 @@ static int sclp_attach_storage(u8 id)
if (!sccb)
return -ENOMEM;
sccb->header.length = PAGE_SIZE;
sccb->header.function_code = 0x40;
rc = sclp_sync_request_timeout(0x00080001 | id << 8, sccb,
SCLP_QUEUE_INTERVAL);
if (rc)

2
drivers/s390/char/sclp_config.c
View File

@ -135,7 +135,7 @@ static ssize_t sysfs_ofb_data_write(struct file *filp, struct kobject *kobj,
return rc ?: count;
}
static struct bin_attribute ofb_bin_attr = {
static const struct bin_attribute ofb_bin_attr = {
.attr = {
.name = "event_data",
.mode = S_IWUSR,

6
drivers/s390/char/sclp_early.c
View File

@ -39,7 +39,7 @@ struct read_info_sccb {
u8 fac84; /* 84 */
u8 fac85; /* 85 */
u8 _pad_86[91 - 86]; /* 86-90 */
u8 flags; /* 91 */
u8 fac91; /* 91 */
u8 _pad_92[98 - 92]; /* 92-97 */
u8 fac98; /* 98 */
u8 hamaxpow; /* 99 */
@ -103,6 +103,8 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
sclp.has_kss = !!(sccb->fac98 & 0x01);
if (sccb->fac85 & 0x02)
S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
if (sccb->fac91 & 0x40)
S390_lowcore.machine_flags |= MACHINE_FLAG_TLB_GUEST;
sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
sclp.rzm <<= 20;
@ -139,7 +141,7 @@ static void __init sclp_early_facilities_detect(struct read_info_sccb *sccb)
/* Save IPL information */
sclp_ipl_info.is_valid = 1;
if (sccb->flags & 0x2)
if (sccb->fac91 & 0x2)
sclp_ipl_info.has_dump = 1;
memcpy(&sclp_ipl_info.loadparm, &sccb->loadparm, LOADPARM_LEN);

2
drivers/s390/char/sclp_ocf.c
View File

@ -126,7 +126,7 @@ static struct attribute *ocf_attrs[] = {
NULL,
};
static struct attribute_group ocf_attr_group = {
static const struct attribute_group ocf_attr_group = {
.attrs = ocf_attrs,
};

2
drivers/s390/char/tape_core.c
View File

@ -175,7 +175,7 @@ static struct attribute *tape_attrs[] = {
NULL
};
static struct attribute_group tape_attr_group = {
static const struct attribute_group tape_attr_group = {
.attrs = tape_attrs,
};

112
drivers/s390/char/vmcp.c
View File

@ -17,15 +17,85 @@
#include <linux/kernel.h>
#include <linux/miscdevice.h>
#include <linux/slab.h>
#include <linux/uaccess.h>
#include <linux/export.h>
#include <linux/mutex.h>
#include <linux/cma.h>
#include <linux/mm.h>
#include <asm/compat.h>
#include <asm/cpcmd.h>
#include <asm/debug.h>
#include <linux/uaccess.h>
#include "vmcp.h"
#include <asm/vmcp.h>
struct vmcp_session {
char *response;
unsigned int bufsize;
unsigned int cma_alloc : 1;
int resp_size;
int resp_code;
struct mutex mutex;
};
static debug_info_t *vmcp_debug;
static unsigned long vmcp_cma_size __initdata = CONFIG_VMCP_CMA_SIZE * 1024 * 1024;
static struct cma *vmcp_cma;
static int __init early_parse_vmcp_cma(char *p)
{
vmcp_cma_size = ALIGN(memparse(p, NULL), PAGE_SIZE);
return 0;
}
early_param("vmcp_cma", early_parse_vmcp_cma);
void __init vmcp_cma_reserve(void)
{
if (!MACHINE_IS_VM)
return;
cma_declare_contiguous(0, vmcp_cma_size, 0, 0, 0, false, "vmcp", &vmcp_cma);
}
static void vmcp_response_alloc(struct vmcp_session *session)
{
struct page *page = NULL;
int nr_pages, order;
order = get_order(session->bufsize);
nr_pages = ALIGN(session->bufsize, PAGE_SIZE) >> PAGE_SHIFT;
/*
* For anything below order 3 allocations rely on the buddy
* allocator. If such low-order allocations can't be handled
* anymore the system won't work anyway.
*/
if (order > 2)
page = cma_alloc(vmcp_cma, nr_pages, 0, GFP_KERNEL);
if (page) {
session->response = (char *)page_to_phys(page);
session->cma_alloc = 1;
return;
}
session->response = (char *)__get_free_pages(GFP_KERNEL | __GFP_RETRY_MAYFAIL, order);
}
static void vmcp_response_free(struct vmcp_session *session)
{
int nr_pages, order;
struct page *page;
if (!session->response)
return;
order = get_order(session->bufsize);
nr_pages = ALIGN(session->bufsize, PAGE_SIZE) >> PAGE_SHIFT;
if (session->cma_alloc) {
page = phys_to_page((unsigned long)session->response);
cma_release(vmcp_cma, page, nr_pages);
session->cma_alloc = 0;
} else {
free_pages((unsigned long)session->response, order);
}
session->response = NULL;
}
static int vmcp_open(struct inode *inode, struct file *file)
{
struct vmcp_session *session;
@ -51,7 +121,7 @@ static int vmcp_release(struct inode *inode, struct file *file)
session = file->private_data;
file->private_data = NULL;
free_pages((unsigned long)session->response, get_order(session->bufsize));
vmcp_response_free(session);
kfree(session);
return 0;
}
@ -97,9 +167,7 @@ vmcp_write(struct file *file, const char __user *buff, size_t count,
return -ERESTARTSYS;
}
if (!session->response)
session->response = (char *)__get_free_pages(GFP_KERNEL
| __GFP_RETRY_MAYFAIL | GFP_DMA,
get_order(session->bufsize));
vmcp_response_alloc(session);
if (!session->response) {
mutex_unlock(&session->mutex);
kfree(cmd);
@ -130,8 +198,8 @@ vmcp_write(struct file *file, const char __user *buff, size_t count,
static long vmcp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{
struct vmcp_session *session;
int ret = -ENOTTY;
int __user *argp;
int temp;
session = file->private_data;
if (is_compat_task())
@ -142,28 +210,26 @@ static long vmcp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
return -ERESTARTSYS;
switch (cmd) {
case VMCP_GETCODE:
temp = session->resp_code;
mutex_unlock(&session->mutex);
return put_user(temp, argp);
ret = put_user(session->resp_code, argp);
break;
case VMCP_SETBUF:
free_pages((unsigned long)session->response,
get_order(session->bufsize));
session->response=NULL;
temp = get_user(session->bufsize, argp);
if (get_order(session->bufsize) > 8) {
vmcp_response_free(session);
ret = get_user(session->bufsize, argp);
if (ret)
session->bufsize = PAGE_SIZE;
temp = -EINVAL;
if (!session->bufsize || get_order(session->bufsize) > 8) {
session->bufsize = PAGE_SIZE;
ret = -EINVAL;
}
mutex_unlock(&session->mutex);
return temp;
break;
case VMCP_GETSIZE:
temp = session->resp_size;
mutex_unlock(&session->mutex);
return put_user(temp, argp);
ret = put_user(session->resp_size, argp);
break;
default:
mutex_unlock(&session->mutex);
return -ENOIOCTLCMD;
break;
}
mutex_unlock(&session->mutex);
return ret;
}
static const struct file_operations vmcp_fops = {

4
drivers/s390/cio/chp.c
View File

@ -143,7 +143,7 @@ static ssize_t chp_measurement_chars_read(struct file *filp,
sizeof(chp->cmg_chars));
}
static struct bin_attribute chp_measurement_chars_attr = {
static const struct bin_attribute chp_measurement_chars_attr = {
.attr = {
.name = "measurement_chars",
.mode = S_IRUSR,
@ -197,7 +197,7 @@ static ssize_t chp_measurement_read(struct file *filp, struct kobject *kobj,
return count;
}
static struct bin_attribute chp_measurement_attr = {
static const struct bin_attribute chp_measurement_attr = {
.attr = {
.name = "measurement",
.mode = S_IRUSR,

4
drivers/s390/cio/device.c
View File

@ -612,7 +612,7 @@ static struct attribute *io_subchannel_attrs[] = {
NULL,
};
static struct attribute_group io_subchannel_attr_group = {
static const struct attribute_group io_subchannel_attr_group = {
.attrs = io_subchannel_attrs,
};
@ -626,7 +626,7 @@ static struct attribute * ccwdev_attrs[] = {
NULL,
};
static struct attribute_group ccwdev_attr_group = {
static const struct attribute_group ccwdev_attr_group = {
.attrs = ccwdev_attrs,
};

2
drivers/s390/crypto/zcrypt_card.c
View File

@ -98,7 +98,7 @@ static struct attribute *zcrypt_card_attrs[] = {
NULL,
};
static struct attribute_group zcrypt_card_attr_group = {
static const struct attribute_group zcrypt_card_attr_group = {
.attrs = zcrypt_card_attrs,
};

2
drivers/s390/crypto/zcrypt_msgtype6.c
View File

@ -140,7 +140,7 @@ struct function_and_rules_block {
* + 0x000A 'MRP ' (MCL3 'PK' or CEX2C 'PK')
* - VUD block
*/
static struct CPRBX static_cprbx = {
static const struct CPRBX static_cprbx = {
.cprb_len = 0x00DC,
.cprb_ver_id = 0x02,
.func_id = {0x54, 0x32},

2
drivers/s390/crypto/zcrypt_queue.c
View File

@ -89,7 +89,7 @@ static struct attribute *zcrypt_queue_attrs[] = {
NULL,
};
static struct attribute_group zcrypt_queue_attr_group = {
static const struct attribute_group zcrypt_queue_attr_group = {
.attrs = zcrypt_queue_attrs,
};

8
drivers/s390/net/qeth_l3_sys.c
View File

@ -350,7 +350,7 @@ static struct attribute *qeth_l3_device_attrs[] = {
NULL,
};
static struct attribute_group qeth_l3_device_attr_group = {
static const struct attribute_group qeth_l3_device_attr_group = {
.attrs = qeth_l3_device_attrs,
};
@ -680,7 +680,7 @@ static struct attribute *qeth_ipato_device_attrs[] = {
NULL,
};
static struct attribute_group qeth_device_ipato_group = {
static const struct attribute_group qeth_device_ipato_group = {
.name = "ipa_takeover",
.attrs = qeth_ipato_device_attrs,
};
@ -843,7 +843,7 @@ static struct attribute *qeth_vipa_device_attrs[] = {
NULL,
};
static struct attribute_group qeth_device_vipa_group = {
static const struct attribute_group qeth_device_vipa_group = {
.name = "vipa",
.attrs = qeth_vipa_device_attrs,
};
@ -1006,7 +1006,7 @@ static struct attribute *qeth_rxip_device_attrs[] = {
NULL,
};
static struct attribute_group qeth_device_rxip_group = {
static const struct attribute_group qeth_device_rxip_group = {
.name = "rxip",
.attrs = qeth_rxip_device_attrs,
};