From: Andi Kleen Date: Wed, 30 Jan 2008 12:33:54 +0000 (+0100) Subject: x86: fix early_ioremap() on 64-bit X-Git-Tag: v2.6.25-rc1~1143^2~109 X-Git-Url: https://err.no/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1a2b441231ddc12b785940000320894bfa02bd82;p=linux-2.6 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 Signed-off-by: Ingo Molnar Signed-off-by: Thomas Gleixner --- diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 0fd9d7f777..c250580a94 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)