From 45ed93deefc42db6c0cf3154f50f5f6404d7ecf5 Mon Sep 17 00:00:00 2001 From: Kurt Garloff Date: Tue, 17 Jan 2012 04:18:02 -0500 Subject: ACPI: Store SRAT table revision commit 8df0eb7c9d96f9e82f233ee8b74e0f0c8471f868 upstream. In SRAT v1, we had 8bit proximity domain (PXM) fields; SRAT v2 provides 32bits for these. The new fields were reserved before. According to the ACPI spec, the OS must disregrard reserved fields. In order to know whether or not, we must know what version the SRAT table has. This patch stores the SRAT table revision for later consumption by arch specific __init functions. Signed-off-by: Kurt Garloff Signed-off-by: Len Brown Signed-off-by: Greg Kroah-Hartman --- drivers/acpi/numa.c | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'drivers/acpi') diff --git a/drivers/acpi/numa.c b/drivers/acpi/numa.c index 3b5c3189fd9..e56f3be7b07 100644 --- a/drivers/acpi/numa.c +++ b/drivers/acpi/numa.c @@ -45,6 +45,8 @@ static int pxm_to_node_map[MAX_PXM_DOMAINS] static int node_to_pxm_map[MAX_NUMNODES] = { [0 ... MAX_NUMNODES - 1] = PXM_INVAL }; +unsigned char acpi_srat_revision __initdata; + int pxm_to_node(int pxm) { if (pxm < 0) @@ -255,9 +257,13 @@ acpi_parse_memory_affinity(struct acpi_subtable_header * header, static int __init acpi_parse_srat(struct acpi_table_header *table) { + struct acpi_table_srat *srat; if (!table) return -EINVAL; + srat = (struct acpi_table_srat *)table; + acpi_srat_revision = srat->header.revision; + /* Real work done in acpi_table_parse_srat below. */ return 0; -- cgit v1.2.3-18-g5258