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authorYinghai Lu <yhlu.kernel@gmail.com>2008-07-10 20:36:37 -0700
committerIngo Molnar <mingo@elte.hu>2008-07-11 10:22:33 +0200
commitf302a5bbe5eb95f3d4227d5bd0e9b92b1b125f4f (patch)
tree876a3611b657898ea197c686e6aa4ab779541dd5 /arch/x86/mm
parent69a7704d7a80b2563278a0c55c2ca6d6202280dc (diff)
downloadop-kernel-dev-f302a5bbe5eb95f3d4227d5bd0e9b92b1b125f4f.zip
op-kernel-dev-f302a5bbe5eb95f3d4227d5bd0e9b92b1b125f4f.tar.gz
x86: reserve SLIT
save the SLIT, in case we are using fixmap to read it, and that fixmap could be cleared by others. Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com> Cc: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/mm')
-rw-r--r--arch/x86/mm/srat_64.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
index 0fd67b8..1b4763e 100644
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -100,7 +100,19 @@ static __init inline int srat_disabled(void)
/* Callback for SLIT parsing */
void __init acpi_numa_slit_init(struct acpi_table_slit *slit)
{
- acpi_slit = slit;
+ unsigned length;
+ unsigned long phys;
+
+ length = slit->header.length;
+ phys = find_e820_area(0, max_pfn_mapped<<PAGE_SHIFT, length,
+ PAGE_SIZE);
+
+ if (phys == -1L)
+ panic(" Can not save slit!\n");
+
+ acpi_slit = __va(phys);
+ memcpy(acpi_slit, slit, length);
+ reserve_early(phys, phys + length, "ACPI SLIT");
}
/* Callback for Proximity Domain -> LAPIC mapping */
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