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x86: reserve SLIT

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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>
This commit is contained in:
Yinghai Lu 2008-07-10 20:36:37 -07:00 committed by Ingo Molnar
parent 69a7704d7a
commit f302a5bbe5
1 changed files with 13 additions and 1 deletions
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14
arch/x86/mm/srat_64.c
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@ -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 */