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| author | Andi Kleen <andi@firstfloor.org> | 2008-01-30 12:33:54 (GMT) |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-01-30 12:33:54 (GMT) |
| commit | 1a2b441231ddc12b785940000320894bfa02bd82 (patch) | |
| tree | 2fab8cf5b8cb91af545bc686efc30adfa29bfb4f /arch/x86/mm/init_64.c | |
| parent | 934d15854d04e8ca2495d8f5698164df990d5d66 (diff) | |
| download | linux-1a2b441231ddc12b785940000320894bfa02bd82.tar.xz | |
x86: fix early_ioremap() on 64-bit
Fix early_ioremap() on x86-64
I had ACPI failures on several machines since a few days. Symptom
was NUMA nodes not getting detected or worse cores not getting detected.
They all came from ACPI not being able to read various of its tables. I finally
bisected it down to Jeremy's "put _PAGE_GLOBAL into PAGE_KERNEL" change.
With that the fix was fairly obvious. The problem was that early_ioremap()
didn't use a "_all" flush that would affect the global PTEs too. So
with global bits getting used everywhere now an early_ioremap would
not actually flush a mapping if something else was mapped previously
on that slot (which can happen with early_iounmap inbetween)
This patch changes all flushes in init_64.c to be __flush_tlb_all()
and fixes the problem here.
Signed-off-by: Andi Kleen <ak@suse.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/mm/init_64.c')
| -rw-r--r-- | arch/x86/mm/init_64.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 0fd9d7f..c250580 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -228,7 +228,7 @@ __meminit void *early_ioremap(unsigned long addr, unsigned long size) addr &= PMD_MASK; for (i = 0; i < pmds; i++, addr += PMD_SIZE) set_pmd(pmd+i, __pmd(addr | __PAGE_KERNEL_LARGE_EXEC)); - __flush_tlb(); + __flush_tlb_all(); return (void *)vaddr; next: ; @@ -249,7 +249,7 @@ __meminit void early_iounmap(void *addr, unsigned long size) pmd = level2_kernel_pgt + pmd_index(vaddr); for (i = 0; i < pmds; i++) pmd_clear(pmd + i); - __flush_tlb(); + __flush_tlb_all(); } static void __meminit @@ -317,7 +317,7 @@ static void __meminit phys_pud_init(pud_t *pud_page, unsigned long addr, unsigne spin_unlock(&init_mm.page_table_lock); unmap_low_page(pmd); } - __flush_tlb(); + __flush_tlb_all(); } static void __init find_early_table_space(unsigned long end) |