60 lines
1.9 KiB
Diff
60 lines
1.9 KiB
Diff
From: Kurt Garloff <garloff@suse.de>
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Subject: Use SRAT table rev to use 8bit or 16/32bit PXM fields (ia64)
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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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ia64 did handle the PXM fields almost consistently, but depending on
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sgi's sn2 platform. This patch leaves the sn2 logic in, but does also
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use 16/32 bits for PXM if the SRAT has rev 2 or higher.
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The patch also adds __init to the two pxm accessor functions, as they
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access __initdata now and are called from an __init function only anyway.
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Note that the code only uses 16 bits for the PXM field in the processor
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proximity field; the patch does not address this as 16 bits are more than
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enough.
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This is patch 3/3.
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Signed-off-by: Kurt Garloff <garloff@suse.de>
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---
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arch/ia64/kernel/acpi.c | 10 ++++++----
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1 file changed, 6 insertions(+), 4 deletions(-)
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--- a/arch/ia64/kernel/acpi.c
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+++ b/arch/ia64/kernel/acpi.c
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@@ -429,22 +429,24 @@ static u32 __devinitdata pxm_flag[PXM_FL
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static struct acpi_table_slit __initdata *slit_table;
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cpumask_t early_cpu_possible_map = CPU_MASK_NONE;
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-static int get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
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+static int __init
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+get_processor_proximity_domain(struct acpi_srat_cpu_affinity *pa)
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{
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int pxm;
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pxm = pa->proximity_domain_lo;
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- if (ia64_platform_is("sn2"))
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+ if (ia64_platform_is("sn2") || acpi_srat_revision >= 2)
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pxm += pa->proximity_domain_hi[0] << 8;
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return pxm;
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}
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-static int get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
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+static int __init
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+get_memory_proximity_domain(struct acpi_srat_mem_affinity *ma)
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{
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int pxm;
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pxm = ma->proximity_domain;
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- if (!ia64_platform_is("sn2"))
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+ if (!ia64_platform_is("sn2") && acpi_srat_revision <= 1)
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pxm &= 0xff;
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return pxm;
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