53 lines
1.5 KiB
Diff
53 lines
1.5 KiB
Diff
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From: Kurt Garloff <garloff@suse.de>
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Subject: Store SRAT table revision
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References: bnc#503038
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Patch-mainline: not yet
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In SRAT v1, we had 8bit proximity domain (PXM) fields; SRAT v2 provides
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32bits for these. The new fields were reserved before.
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According to the ACPI spec, the OS must disregrard reserved fields.
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In order to know whether or not, we must know what version the SRAT
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table has.
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This patch stores the SRAT table revision for later consumption
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by arch specific __init functions.
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This is patch 1/3.
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Signed-off-by: Kurt Garloff <garloff@suse.de>
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---
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drivers/acpi/numa.c | 3 +++
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include/acpi/acpi_numa.h | 1 +
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2 files changed, 4 insertions(+)
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--- a/drivers/acpi/numa.c
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+++ b/drivers/acpi/numa.c
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@@ -45,6 +45,8 @@ static int pxm_to_node_map[MAX_PXM_DOMAI
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static int node_to_pxm_map[MAX_NUMNODES]
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= { [0 ... MAX_NUMNODES - 1] = PXM_INVAL };
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+unsigned char acpi_srat_revision __initdata;
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+
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int pxm_to_node(int pxm)
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{
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if (pxm < 0)
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@@ -259,6 +261,7 @@ static int __init acpi_parse_srat(struct
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return -EINVAL;
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srat = (struct acpi_table_srat *)table;
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+ acpi_srat_revision = srat->header.revision;
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return 0;
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}
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--- a/include/acpi/acpi_numa.h
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+++ b/include/acpi/acpi_numa.h
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@@ -15,6 +15,7 @@ extern int pxm_to_node(int);
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extern int node_to_pxm(int);
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extern void __acpi_map_pxm_to_node(int, int);
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extern int acpi_map_pxm_to_node(int);
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+extern unsigned char acpi_srat_revision;
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#endif /* CONFIG_ACPI_NUMA */
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#endif /* __ACP_NUMA_H */
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