800917b5a2
- Update to Xen 4.1.2_rc2 c/s 23152 - bnc#716695 - domUs using tap devices will not start updated multi-xvdp.patch - Upstream patches from Jan 23803-intel-pmu-models.patch 23800-x86_64-guest-addr-range.patch 23795-intel-ich10-quirk.patch 23804-x86-IPI-counts.patch - bnc#706106 - Inconsistent reporting of VM names during migration xend-migration-domname-fix.patch - bnc#712823 - L3:Xen guest does not start reliable when rebooted xend-vcpu-affinity-fix.patch OBS-URL: https://build.opensuse.org/package/show/Virtualization/xen?expand=0&rev=143
31 lines
1.2 KiB
Diff
31 lines
1.2 KiB
Diff
References: FATE#309893
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# HG changeset patch
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# User Mark Langsdorf <mark.langsdorf@amd.com>
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# Date 1308051989 -3600
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# Node ID 450f1d198e1e299b69489d513f591f0301cc5166
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# Parent 864a3dd1d9b4664f1ece44c9eaf390969253b7a8
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x86/amd: Eliminate cache flushing when entering C3 on select AMD processors
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AMD Fam15h processors have a shared cache. It does not need
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to be be flushed when entering C3 and doing so causes reduces
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performance. Modify acpi_processor_power_init_bm_check to
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prevent these processors from flushing when entering C3.
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Signed-off-by: Mark Langsdorf <mark.langsdorf@amd.com>
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Index: xen-4.1.2-testing/xen/arch/x86/acpi/cpu_idle.c
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===================================================================
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--- xen-4.1.2-testing.orig/xen/arch/x86/acpi/cpu_idle.c
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+++ xen-4.1.2-testing/xen/arch/x86/acpi/cpu_idle.c
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@@ -710,7 +710,8 @@ static void acpi_processor_power_init_bm
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flags->bm_check = 0;
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if ( num_online_cpus() == 1 )
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flags->bm_check = 1;
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- else if ( c->x86_vendor == X86_VENDOR_INTEL )
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+ else if ( (c->x86_vendor == X86_VENDOR_INTEL) ||
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+ ((c->x86_vendor == X86_VENDOR_AMD) && (c->x86 == 0x15)) )
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{
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/*
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* Today all MP CPUs that support C3 share cache.
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