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powerpc fixes for 5.3 #3 

Wire up the new clone3 syscall.
 
 A fix for the PAPR SCM nvdimm driver, to fix a crash when firmware gives us a
 device that's attached to a non-online NUMA node.
 
 A fix for a boot failure on 32-bit with KASAN enabled.
 
 Three fixes for implicit fall through warnings, some of which are errors for us
 due to -Werror.
 
 Thanks to:
   Aneesh Kumar K.V, Christophe Leroy, Kees Cook, Santosh Sivaraj, Stephen
   Rothwell.
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Merge tag 'powerpc-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

Pull powerpc fixes from Michael Ellerman:
 "Some more powerpc fixes for 5.3:

   - Wire up the new clone3 syscall.

   - A fix for the PAPR SCM nvdimm driver, to fix a crash when firmware
     gives us a device that's attached to a non-online NUMA node.

   - A fix for a boot failure on 32-bit with KASAN enabled.

   - Three fixes for implicit fall through warnings, some of which are
     errors for us due to -Werror.

  Thanks to: Aneesh Kumar K.V, Christophe Leroy, Kees Cook, Santosh
  Sivaraj, Stephen Rothwell"

* tag 'powerpc-5.3-3' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/kasan: fix early boot failure on PPC32
  drivers/macintosh/smu.c: Mark expected switch fall-through
  powerpc/spe: Mark expected switch fall-throughs
  powerpc/nvdimm: Pick nearby online node if the device node is not online
  powerpc/kvm: Fall through switch case explicitly
  powerpc: Wire up clone3 syscall
This commit is contained in:
Linus Torvalds 2019-08-04 10:30:47 -07:00
parent 4c0d228c3b d7e23b887f
commit 4b6f23161b
9 changed files with 53 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
arch/powerpc/include/asm/unistd.h
View File

@ -49,6 +49,7 @@
#define __ARCH_WANT_SYS_FORK
#define __ARCH_WANT_SYS_VFORK
#define __ARCH_WANT_SYS_CLONE
#define __ARCH_WANT_SYS_CLONE3
#endif /* __ASSEMBLY__ */
#endif /* _ASM_POWERPC_UNISTD_H_ */

4
arch/powerpc/kernel/align.c
View File

@ -176,9 +176,11 @@ static int emulate_spe(struct pt_regs *regs, unsigned int reg,
ret |= __get_user_inatomic(temp.v[1], p++);
ret |= __get_user_inatomic(temp.v[2], p++);
ret |= __get_user_inatomic(temp.v[3], p++);
/* fall through */
case 4:
ret |= __get_user_inatomic(temp.v[4], p++);
ret |= __get_user_inatomic(temp.v[5], p++);
/* fall through */
case 2:
ret |= __get_user_inatomic(temp.v[6], p++);
ret |= __get_user_inatomic(temp.v[7], p++);
@ -259,9 +261,11 @@ static int emulate_spe(struct pt_regs *regs, unsigned int reg,
ret |= __put_user_inatomic(data.v[1], p++);
ret |= __put_user_inatomic(data.v[2], p++);
ret |= __put_user_inatomic(data.v[3], p++);
/* fall through */
case 4:
ret |= __put_user_inatomic(data.v[4], p++);
ret |= __put_user_inatomic(data.v[5], p++);
/* fall through */
case 2:
ret |= __put_user_inatomic(data.v[6], p++);
ret |= __put_user_inatomic(data.v[7], p++);

8
arch/powerpc/kernel/entry_32.S
View File

@ -597,6 +597,14 @@ ppc_clone:
stw r0,_TRAP(r1) /* register set saved */
b sys_clone
.globl ppc_clone3
ppc_clone3:
SAVE_NVGPRS(r1)
lwz r0,_TRAP(r1)
rlwinm r0,r0,0,0,30 /* clear LSB to indicate full */
stw r0,_TRAP(r1) /* register set saved */
b sys_clone3
.globl ppc_swapcontext
ppc_swapcontext:
SAVE_NVGPRS(r1)

5
arch/powerpc/kernel/entry_64.S
View File

@ -487,6 +487,11 @@ _GLOBAL(ppc_clone)
bl sys_clone
b .Lsyscall_exit
_GLOBAL(ppc_clone3)
bl save_nvgprs
bl sys_clone3
b .Lsyscall_exit
_GLOBAL(ppc32_swapcontext)
bl save_nvgprs
bl compat_sys_swapcontext

2
arch/powerpc/kernel/syscalls/syscall.tbl
View File

@ -516,4 +516,4 @@
432 common fsmount sys_fsmount
433 common fspick sys_fspick
434 common pidfd_open sys_pidfd_open
# 435 reserved for clone3
435 nospu clone3 ppc_clone3

1
arch/powerpc/kvm/book3s_32_mmu.c
View File

@ -239,6 +239,7 @@ static int kvmppc_mmu_book3s_32_xlate_pte(struct kvm_vcpu *vcpu, gva_t eaddr,
case 2:
case 6:
pte->may_write = true;
/* fall through */
case 3:
case 5:
case 7:

7
arch/powerpc/mm/kasan/kasan_init_32.c
View File

@ -21,7 +21,7 @@ static void kasan_populate_pte(pte_t *ptep, pgprot_t prot)
__set_pte_at(&init_mm, va, ptep, pfn_pte(PHYS_PFN(pa), prot), 0);
}
static int kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_end)
static int __ref kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_end)
{
pmd_t *pmd;
unsigned long k_cur, k_next;
@ -35,7 +35,10 @@ static int kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_
if ((void *)pmd_page_vaddr(*pmd) != kasan_early_shadow_pte)
continue;
new = pte_alloc_one_kernel(&init_mm);
if (slab_is_available())
new = pte_alloc_one_kernel(&init_mm);
else
new = memblock_alloc(PTE_FRAG_SIZE, PTE_FRAG_SIZE);
if (!new)
return -ENOMEM;

29
arch/powerpc/platforms/pseries/papr_scm.c
View File

@ -275,12 +275,32 @@ static const struct attribute_group *papr_scm_dimm_groups[] = {
NULL,
};
static inline int papr_scm_node(int node)
{
int min_dist = INT_MAX, dist;
int nid, min_node;
if ((node == NUMA_NO_NODE) || node_online(node))
return node;
min_node = first_online_node;
for_each_online_node(nid) {
dist = node_distance(node, nid);
if (dist < min_dist) {
min_dist = dist;
min_node = nid;
}
}
return min_node;
}
static int papr_scm_nvdimm_init(struct papr_scm_priv *p)
{
struct device *dev = &p->pdev->dev;
struct nd_mapping_desc mapping;
struct nd_region_desc ndr_desc;
unsigned long dimm_flags;
int target_nid, online_nid;
p->bus_desc.ndctl = papr_scm_ndctl;
p->bus_desc.module = THIS_MODULE;
@ -319,8 +339,10 @@ static int papr_scm_nvdimm_init(struct papr_scm_priv *p)
memset(&ndr_desc, 0, sizeof(ndr_desc));
ndr_desc.attr_groups = region_attr_groups;
ndr_desc.numa_node = dev_to_node(&p->pdev->dev);
ndr_desc.target_node = ndr_desc.numa_node;
target_nid = dev_to_node(&p->pdev->dev);
online_nid = papr_scm_node(target_nid);
ndr_desc.numa_node = online_nid;
ndr_desc.target_node = target_nid;
ndr_desc.res = &p->res;
ndr_desc.of_node = p->dn;
ndr_desc.provider_data = p;
@ -338,6 +360,9 @@ static int papr_scm_nvdimm_init(struct papr_scm_priv *p)
ndr_desc.res, p->dn);
goto err;
}
if (target_nid != online_nid)
dev_info(dev, "Region registered with target node %d and online node %d",
target_nid, online_nid);
return 0;

1
drivers/macintosh/smu.c
View File

@ -852,6 +852,7 @@ int smu_queue_i2c(struct smu_i2c_cmd *cmd)
break;
case SMU_I2C_TRANSFER_COMBINED:
cmd->info.devaddr &= 0xfe;
/* fall through */
case SMU_I2C_TRANSFER_STDSUB:
if (cmd->info.sublen > 3)
return -EINVAL;