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

Browse Source 
Pull x86 fixes from Ingo Molnar:
 "This fixes a couple of nasty page table initialization bugs which were
  causing kdump regressions.  A clean rearchitecturing of the code is in
  the works - meanwhile these are reverts that restore the
  best-known-working state of the kernel.

  There's also EFI fixes and other small fixes."

* 'x86-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86, mm: Undo incorrect revert in arch/x86/mm/init.c
  x86: efi: Turn off efi_enabled after setup on mixed fw/kernel
  x86, mm: Find_early_table_space based on ranges that are actually being mapped
  x86, mm: Use memblock memory loop instead of e820_RAM
  x86, mm: Trim memory in memblock to be page aligned
  x86/irq/ioapic: Check for valid irq_cfg pointer in smp_irq_move_cleanup_interrupt
  x86/efi: Fix oops caused by incorrect set_memory_uc() usage
  x86-64: Fix page table accounting
  Revert "x86/mm: Fix the size calculation of mapping tables"
  MAINTAINERS: Add EFI git repository location
This commit is contained in:
Linus Torvalds 2012-10-26 09:35:46 -07:00
commit 622f202a4c
11 changed files with 127 additions and 59 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
MAINTAINERS
View File

@ -2802,6 +2802,7 @@ F: sound/usb/misc/ua101.c
EXTENSIBLE FIRMWARE INTERFACE (EFI)
M: Matt Fleming <matt.fleming@intel.com>
L: linux-efi@vger.kernel.org
T: git git://git.kernel.org/pub/scm/linux/kernel/git/mfleming/efi.git
S: Maintained
F: Documentation/x86/efi-stub.txt
F: arch/ia64/kernel/efi.c

6
arch/x86/include/asm/efi.h
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@ -35,7 +35,7 @@ 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)
#define efi_ioremap(addr, size, type, attr) ioremap_cache(addr, size)
#else /* !CONFIG_X86_32 */
@ -89,7 +89,7 @@ extern u64 efi_call6(void *fp, u64 arg1, u64 arg2, u64 arg3,
(u64)(a3), (u64)(a4), (u64)(a5), (u64)(a6))
extern void __iomem *efi_ioremap(unsigned long addr, unsigned long size,
u32 type);
u32 type, u64 attribute);
#endif /* CONFIG_X86_32 */
@ -98,6 +98,8 @@ extern void efi_set_executable(efi_memory_desc_t *md, bool executable);
extern int efi_memblock_x86_reserve_range(void);
extern void efi_call_phys_prelog(void);
extern void efi_call_phys_epilog(void);
extern void efi_unmap_memmap(void);
extern void efi_memory_uc(u64 addr, unsigned long size);
#ifndef CONFIG_EFI
/*

3
arch/x86/kernel/apic/io_apic.c
View File

@ -2257,6 +2257,9 @@ asmlinkage void smp_irq_move_cleanup_interrupt(void)
continue;
cfg = irq_cfg(irq);
if (!cfg)
continue;
raw_spin_lock(&desc->lock);
/*

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

@ -1077,6 +1077,9 @@ void __init memblock_x86_fill(void)
memblock_add(ei->addr, ei->size);
}
/* throw away partial pages */
memblock_trim_memory(PAGE_SIZE);
memblock_dump_all();
}

29
arch/x86/kernel/setup.c
View File

@ -921,18 +921,19 @@ void __init setup_arch(char **cmdline_p)
#ifdef CONFIG_X86_64
if (max_pfn > max_low_pfn) {
int i;
for (i = 0; i < e820.nr_map; i++) {
struct e820entry *ei = &e820.map[i];
unsigned long start, end;
unsigned long start_pfn, end_pfn;
if (ei->addr + ei->size <= 1UL << 32)
continue;
if (ei->type == E820_RESERVED)
for_each_mem_pfn_range(i, MAX_NUMNODES, &start_pfn, &end_pfn,
NULL) {
end = PFN_PHYS(end_pfn);
if (end <= (1UL<<32))
continue;
start = PFN_PHYS(start_pfn);
max_pfn_mapped = init_memory_mapping(
ei->addr < 1UL << 32 ? 1UL << 32 : ei->addr,
ei->addr + ei->size);
max((1UL<<32), start), end);
}
/* can we preseve max_low_pfn ?*/
@ -1048,6 +1049,18 @@ void __init setup_arch(char **cmdline_p)
arch_init_ideal_nops();
register_refined_jiffies(CLOCK_TICK_RATE);
#ifdef CONFIG_EFI
/* Once setup is done above, disable efi_enabled on mismatched
* firmware/kernel archtectures since there is no support for
* runtime services.
*/
if (efi_enabled && IS_ENABLED(CONFIG_X86_64) != efi_64bit) {
pr_info("efi: Setup done, disabling due to 32/64-bit mismatch\n");
efi_unmap_memmap();
efi_enabled = 0;
}
#endif
}
#ifdef CONFIG_X86_32

58
arch/x86/mm/init.c
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@ -35,40 +35,44 @@ struct map_range {
unsigned page_size_mask;
};
static void __init find_early_table_space(struct map_range *mr, unsigned long end,
int use_pse, int use_gbpages)
/*
* First calculate space needed for kernel direct mapping page tables to cover
* mr[0].start to mr[nr_range - 1].end, while accounting for possible 2M and 1GB
* pages. Then find enough contiguous space for those page tables.
*/
static void __init find_early_table_space(struct map_range *mr, int nr_range)
{
unsigned long puds, pmds, ptes, tables, start = 0, good_end = end;
int i;
unsigned long puds = 0, pmds = 0, ptes = 0, tables;
unsigned long start = 0, good_end;
phys_addr_t base;
puds = (end + PUD_SIZE - 1) >> PUD_SHIFT;
tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
for (i = 0; i < nr_range; i++) {
unsigned long range, extra;
if (use_gbpages) {
unsigned long extra;
range = mr[i].end - mr[i].start;
puds += (range + PUD_SIZE - 1) >> PUD_SHIFT;
extra = end - ((end>>PUD_SHIFT) << PUD_SHIFT);
pmds = (extra + PMD_SIZE - 1) >> PMD_SHIFT;
} else
pmds = (end + PMD_SIZE - 1) >> PMD_SHIFT;
if (mr[i].page_size_mask & (1 << PG_LEVEL_1G)) {
extra = range - ((range >> PUD_SHIFT) << PUD_SHIFT);
pmds += (extra + PMD_SIZE - 1) >> PMD_SHIFT;
} else {
pmds += (range + PMD_SIZE - 1) >> PMD_SHIFT;
}
tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
if (use_pse) {
unsigned long extra;
extra = end - ((end>>PMD_SHIFT) << PMD_SHIFT);
if (mr[i].page_size_mask & (1 << PG_LEVEL_2M)) {
extra = range - ((range >> PMD_SHIFT) << PMD_SHIFT);
#ifdef CONFIG_X86_32
extra += PMD_SIZE;
extra += PMD_SIZE;
#endif
/* The first 2/4M doesn't use large pages. */
if (mr->start < PMD_SIZE)
extra += mr->end - mr->start;
ptes = (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
} else
ptes = (end + PAGE_SIZE - 1) >> PAGE_SHIFT;
ptes += (extra + PAGE_SIZE - 1) >> PAGE_SHIFT;
} else {
ptes += (range + PAGE_SIZE - 1) >> PAGE_SHIFT;
}
}
tables = roundup(puds * sizeof(pud_t), PAGE_SIZE);
tables += roundup(pmds * sizeof(pmd_t), PAGE_SIZE);
tables += roundup(ptes * sizeof(pte_t), PAGE_SIZE);
#ifdef CONFIG_X86_32
@ -86,7 +90,7 @@ static void __init find_early_table_space(struct map_range *mr, unsigned long en
pgt_buf_top = pgt_buf_start + (tables >> PAGE_SHIFT);
printk(KERN_DEBUG "kernel direct mapping tables up to %#lx @ [mem %#010lx-%#010lx]\n",
end - 1, pgt_buf_start << PAGE_SHIFT,
mr[nr_range - 1].end - 1, pgt_buf_start << PAGE_SHIFT,
(pgt_buf_top << PAGE_SHIFT) - 1);
}
@ -267,7 +271,7 @@ unsigned long __init_refok init_memory_mapping(unsigned long start,
* nodes are discovered.
*/
if (!after_bootmem)
find_early_table_space(&mr[0], end, use_pse, use_gbpages);
find_early_table_space(mr, nr_range);
for (i = 0; i < nr_range; i++)
ret = kernel_physical_mapping_init(mr[i].start, mr[i].end,

7
arch/x86/mm/init_64.c
View File

@ -386,7 +386,8 @@ phys_pte_init(pte_t *pte_page, unsigned long addr, unsigned long end,
* these mappings are more intelligent.
*/
if (pte_val(*pte)) {
pages++;
if (!after_bootmem)
pages++;
continue;
}
@ -451,6 +452,8 @@ phys_pmd_init(pmd_t *pmd_page, unsigned long address, unsigned long end,
* attributes.
*/
if (page_size_mask & (1 << PG_LEVEL_2M)) {
if (!after_bootmem)
pages++;
last_map_addr = next;
continue;
}
@ -526,6 +529,8 @@ phys_pud_init(pud_t *pud_page, unsigned long addr, unsigned long end,
* attributes.
*/
if (page_size_mask & (1 << PG_LEVEL_1G)) {
if (!after_bootmem)
pages++;
last_map_addr = next;
continue;
}

47
arch/x86/platform/efi/efi.c
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@ -70,11 +70,15 @@ EXPORT_SYMBOL(efi);
struct efi_memory_map memmap;
bool efi_64bit;
static bool efi_native;
static struct efi efi_phys __initdata;
static efi_system_table_t efi_systab __initdata;
static inline bool efi_is_native(void)
{
return IS_ENABLED(CONFIG_X86_64) == efi_64bit;
}
static int __init setup_noefi(char *arg)
{
efi_enabled = 0;
@ -420,7 +424,7 @@ void __init efi_reserve_boot_services(void)
}
}
static void __init efi_unmap_memmap(void)
void __init efi_unmap_memmap(void)
{
if (memmap.map) {
early_iounmap(memmap.map, memmap.nr_map * memmap.desc_size);
@ -432,7 +436,7 @@ void __init efi_free_boot_services(void)
{
void *p;
if (!efi_native)
if (!efi_is_native())
return;
for (p = memmap.map; p < memmap.map_end; p += memmap.desc_size) {
@ -684,12 +688,10 @@ void __init efi_init(void)
return;
}
efi_phys.systab = (efi_system_table_t *)boot_params.efi_info.efi_systab;
efi_native = !efi_64bit;
#else
efi_phys.systab = (efi_system_table_t *)
(boot_params.efi_info.efi_systab |
((__u64)boot_params.efi_info.efi_systab_hi<<32));
efi_native = efi_64bit;
#endif
if (efi_systab_init(efi_phys.systab)) {
@ -723,7 +725,7 @@ void __init efi_init(void)
* that doesn't match the kernel 32/64-bit mode.
*/
if (!efi_native)
if (!efi_is_native())
pr_info("No EFI runtime due to 32/64-bit mismatch with kernel\n");
else if (efi_runtime_init()) {
efi_enabled = 0;
@ -735,7 +737,7 @@ void __init efi_init(void)
return;
}
#ifdef CONFIG_X86_32
if (efi_native) {
if (efi_is_native()) {
x86_platform.get_wallclock = efi_get_time;
x86_platform.set_wallclock = efi_set_rtc_mmss;
}
@ -810,6 +812,16 @@ void __iomem *efi_lookup_mapped_addr(u64 phys_addr)
return NULL;
}
void efi_memory_uc(u64 addr, unsigned long size)
{
unsigned long page_shift = 1UL << EFI_PAGE_SHIFT;
u64 npages;
npages = round_up(size, page_shift) / page_shift;
memrange_efi_to_native(&addr, &npages);
set_memory_uc(addr, npages);
}
/*
* This function will switch the EFI runtime services to virtual mode.
* Essentially, look through the EFI memmap and map every region that
@ -823,7 +835,7 @@ void __init efi_enter_virtual_mode(void)
efi_memory_desc_t *md, *prev_md = NULL;
efi_status_t status;
unsigned long size;
u64 end, systab, addr, npages, end_pfn;
u64 end, systab, end_pfn;
void *p, *va, *new_memmap = NULL;
int count = 0;
@ -834,7 +846,7 @@ void __init efi_enter_virtual_mode(void)
* non-native EFI
*/
if (!efi_native) {
if (!efi_is_native()) {
efi_unmap_memmap();
return;
}
@ -879,10 +891,14 @@ 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);
else
va = efi_ioremap(md->phys_addr, size, md->type);
if (!(md->attribute & EFI_MEMORY_WB))
efi_memory_uc((u64)(unsigned long)va, size);
} else
va = efi_ioremap(md->phys_addr, size,
md->type, md->attribute);
md->virt_addr = (u64) (unsigned long) va;
@ -892,13 +908,6 @@ 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;

7
arch/x86/platform/efi/efi_64.c
View File

@ -82,7 +82,7 @@ void __init efi_call_phys_epilog(void)
}
void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long size,
u32 type)
u32 type, u64 attribute)
{
unsigned long last_map_pfn;
@ -92,8 +92,11 @@ void __iomem *__init efi_ioremap(unsigned long phys_addr, unsigned long 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);
efi_ioremap(top, size - (top - phys_addr), type, attribute);
}
if (!(attribute & EFI_MEMORY_WB))
efi_memory_uc((u64)(unsigned long)__va(phys_addr), size);
return (void __iomem *)__va(phys_addr);
}

1
include/linux/memblock.h
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@ -57,6 +57,7 @@ int memblock_add(phys_addr_t base, phys_addr_t size);
int memblock_remove(phys_addr_t base, phys_addr_t size);
int memblock_free(phys_addr_t base, phys_addr_t size);
int memblock_reserve(phys_addr_t base, phys_addr_t size);
void memblock_trim_memory(phys_addr_t align);
#ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP
void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn,

24
mm/memblock.c
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@ -930,6 +930,30 @@ int __init_memblock memblock_is_region_reserved(phys_addr_t base, phys_addr_t si
return memblock_overlaps_region(&memblock.reserved, base, size) >= 0;
}
void __init_memblock memblock_trim_memory(phys_addr_t align)
{
int i;
phys_addr_t start, end, orig_start, orig_end;
struct memblock_type *mem = &memblock.memory;
for (i = 0; i < mem->cnt; i++) {
orig_start = mem->regions[i].base;
orig_end = mem->regions[i].base + mem->regions[i].size;
start = round_up(orig_start, align);
end = round_down(orig_end, align);
if (start == orig_start && end == orig_end)
continue;
if (start < end) {
mem->regions[i].base = start;
mem->regions[i].size = end - start;
} else {
memblock_remove_region(mem, i);
i--;
}
}
}
void __init_memblock memblock_set_current_limit(phys_addr_t limit)
{