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>
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 @@
/* 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 */