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Merge branch 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip 

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  Revert "x86, efi: Calling __pa() with an ioremap()ed address is invalid"
  x86, efi: Make efi_call_phys_{prelog,epilog} CONFIG_RELOCATABLE-aware
This commit is contained in:
Linus Torvalds 2011-12-13 15:02:31 -08:00
parent 653f42f6b6 e1ad783b12
commit 373da0a2a3
7 changed files with 37 additions and 94 deletions
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8
arch/x86/include/asm/e820.h
View File

@ -53,13 +53,6 @@
*/
#define E820_RESERVED_KERN 128
/*
* Address ranges that need to be mapped by the kernel direct
* mapping. This is used to make sure regions such as
* EFI_RUNTIME_SERVICES_DATA are directly mapped. See setup_arch().
*/
#define E820_RESERVED_EFI 129
#ifndef __ASSEMBLY__
#include <linux/types.h>
struct e820entry {
@ -122,7 +115,6 @@ static inline void early_memtest(unsigned long start, unsigned long end)
}
#endif
extern unsigned long e820_end_pfn(unsigned long limit_pfn, unsigned type);
extern unsigned long e820_end_of_ram_pfn(void);
extern unsigned long e820_end_of_low_ram_pfn(void);
extern u64 early_reserve_e820(u64 startt, u64 sizet, u64 align);

5
arch/x86/include/asm/efi.h
View File

@ -33,6 +33,8 @@ extern unsigned long asmlinkage efi_call_phys(void *, ...);
#define efi_call_virt6(f, a1, a2, a3, a4, a5, a6) \
efi_call_virt(f, a1, a2, a3, a4, a5, a6)
#define efi_ioremap(addr, size, type) ioremap_cache(addr, size)
#else /* !CONFIG_X86_32 */
extern u64 efi_call0(void *fp);
@ -82,6 +84,9 @@ extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
efi_call6((void *)(efi.systab->runtime->f), (u64)(a1), (u64)(a2), \
(u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
u32 type);
#endif /* CONFIG_X86_32 */
extern int add_efi_memmap;

3
arch/x86/kernel/e820.c
View File

@ -135,7 +135,6 @@ static void __init e820_print_type(u32 type)
printk(KERN_CONT "(usable)");
break;
case E820_RESERVED:
case E820_RESERVED_EFI:
printk(KERN_CONT "(reserved)");
break;
case E820_ACPI:
@ -784,7 +783,7 @@ u64 __init early_reserve_e820(u64 startt, u64 sizet, u64 align)
/*
* Find the highest page frame number we have available
*/
unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
static unsigned long __init e820_end_pfn(unsigned long limit_pfn, unsigned type)
{
int i;
unsigned long last_pfn = 0;

21
arch/x86/kernel/setup.c
View File

@ -691,8 +691,6 @@ early_param("reservelow", parse_reservelow);
void __init setup_arch(char **cmdline_p)
{
unsigned long end_pfn;
#ifdef CONFIG_X86_32
memcpy(&boot_cpu_data, &new_cpu_data, sizeof(new_cpu_data));
visws_early_detect();
@ -934,24 +932,7 @@ void __init setup_arch(char **cmdline_p)
init_gbpages();
/* max_pfn_mapped is updated here */
end_pfn = max_low_pfn;
#ifdef CONFIG_X86_64
/*
* There may be regions after the last E820_RAM region that we
* want to include in the kernel direct mapping, such as
* EFI_RUNTIME_SERVICES_DATA.
*/
if (efi_enabled) {
unsigned long efi_end;
efi_end = e820_end_pfn(MAXMEM>>PAGE_SHIFT, E820_RESERVED_EFI);
if (efi_end > max_low_pfn)
end_pfn = efi_end;
}
#endif
max_low_pfn_mapped = init_memory_mapping(0, end_pfn << PAGE_SHIFT);
max_low_pfn_mapped = init_memory_mapping(0, max_low_pfn<<PAGE_SHIFT);
max_pfn_mapped = max_low_pfn_mapped;
#ifdef CONFIG_X86_64

29
arch/x86/platform/efi/efi.c
View File

@ -323,13 +323,10 @@ static void __init do_add_efi_memmap(void)
case EFI_UNUSABLE_MEMORY:
e820_type = E820_UNUSABLE;
break;
case EFI_RUNTIME_SERVICES_DATA:
e820_type = E820_RESERVED_EFI;
break;
default:
/*
* EFI_RESERVED_TYPE EFI_RUNTIME_SERVICES_CODE
* EFI_MEMORY_MAPPED_IO
* EFI_RUNTIME_SERVICES_DATA EFI_MEMORY_MAPPED_IO
* EFI_MEMORY_MAPPED_IO_PORT_SPACE EFI_PAL_CODE
*/
e820_type = E820_RESERVED;
@ -674,21 +671,10 @@ void __init efi_enter_virtual_mode(void)
end_pfn = PFN_UP(end);
if (end_pfn <= max_low_pfn_mapped
|| (end_pfn > (1UL << (32 - PAGE_SHIFT))
&& end_pfn <= max_pfn_mapped)) {
&& end_pfn <= max_pfn_mapped))
va = __va(md->phys_addr);
if (!(md->attribute & EFI_MEMORY_WB)) {
addr = (u64) (unsigned long)va;
npages = md->num_pages;
memrange_efi_to_native(&addr, &npages);
set_memory_uc(addr, npages);
}
} else {
if (!(md->attribute & EFI_MEMORY_WB))
va = ioremap_nocache(md->phys_addr, size);
else
va = ioremap_cache(md->phys_addr, size);
}
else
va = efi_ioremap(md->phys_addr, size, md->type);
md->virt_addr = (u64) (unsigned long) va;
@ -698,6 +684,13 @@ void __init efi_enter_virtual_mode(void)
continue;
}
if (!(md->attribute & EFI_MEMORY_WB)) {
addr = md->virt_addr;
npages = md->num_pages;
memrange_efi_to_native(&addr, &npages);
set_memory_uc(addr, npages);
}
systab = (u64) (unsigned long) efi_phys.systab;
if (md->phys_addr <= systab && systab < end) {
systab += md->virt_addr - md->phys_addr;

48
arch/x86/platform/efi/efi_32.c
View File

@ -39,43 +39,14 @@
*/
static unsigned long efi_rt_eflags;
static pgd_t efi_bak_pg_dir_pointer[2];
void efi_call_phys_prelog(void)
{
unsigned long cr4;
unsigned long temp;
struct desc_ptr gdt_descr;
local_irq_save(efi_rt_eflags);
/*
* If I don't have PAE, I should just duplicate two entries in page
* directory. If I have PAE, I just need to duplicate one entry in
* page directory.
*/
cr4 = read_cr4_safe();
if (cr4 & X86_CR4_PAE) {
efi_bak_pg_dir_pointer[0].pgd =
swapper_pg_dir[pgd_index(0)].pgd;
swapper_pg_dir[0].pgd =
swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
} else {
efi_bak_pg_dir_pointer[0].pgd =
swapper_pg_dir[pgd_index(0)].pgd;
efi_bak_pg_dir_pointer[1].pgd =
swapper_pg_dir[pgd_index(0x400000)].pgd;
swapper_pg_dir[pgd_index(0)].pgd =
swapper_pg_dir[pgd_index(PAGE_OFFSET)].pgd;
temp = PAGE_OFFSET + 0x400000;
swapper_pg_dir[pgd_index(0x400000)].pgd =
swapper_pg_dir[pgd_index(temp)].pgd;
}
/*
* After the lock is released, the original page table is restored.
*/
load_cr3(initial_page_table);
__flush_tlb_all();
gdt_descr.address = __pa(get_cpu_gdt_table(0));
@ -85,28 +56,13 @@ void efi_call_phys_prelog(void)
void efi_call_phys_epilog(void)
{
unsigned long cr4;
struct desc_ptr gdt_descr;
gdt_descr.address = (unsigned long)get_cpu_gdt_table(0);
gdt_descr.size = GDT_SIZE - 1;
load_gdt(&gdt_descr);
cr4 = read_cr4_safe();
if (cr4 & X86_CR4_PAE) {
swapper_pg_dir[pgd_index(0)].pgd =
efi_bak_pg_dir_pointer[0].pgd;
} else {
swapper_pg_dir[pgd_index(0)].pgd =
efi_bak_pg_dir_pointer[0].pgd;
swapper_pg_dir[pgd_index(0x400000)].pgd =
efi_bak_pg_dir_pointer[1].pgd;
}
/*
* After the lock is released, the original page table is restored.
*/
load_cr3(swapper_pg_dir);
__flush_tlb_all();
local_irq_restore(efi_rt_eflags);

17
arch/x86/platform/efi/efi_64.c
View File

@ -80,3 +80,20 @@ void __init efi_call_phys_epilog(void)
local_irq_restore(efi_flags);
early_code_mapping_set_exec(0);
}
void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size,
u32 type)
{
unsigned long last_map_pfn;
if (type == EFI_MEMORY_MAPPED_IO)
return ioremap(phys_addr, size);
last_map_pfn = init_memory_mapping(phys_addr, phys_addr + size);
if ((last_map_pfn << PAGE_SHIFT) < phys_addr + size) {
unsigned long top = last_map_pfn << PAGE_SHIFT;
efi_ioremap(top, size - (top - phys_addr), type);
}
return (void __iomem *)__va(phys_addr);
}