This is a note to let you know that I've just added the patch titled
KVM: x86: Increase the number of fixed MTRR regs to 10
to the 3.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
kvm-x86-increase-the-number-of-fixed-mtrr-regs-to-10.patch
and it can be found in the queue-3.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 682367c494869008eb89ef733f196e99415ae862 Mon Sep 17 00:00:00 2001
From: Nadav Amit <namit@xxxxxxxxxxxxxxxxx>
Date: Wed, 18 Jun 2014 17:21:19 +0300
Subject: KVM: x86: Increase the number of fixed MTRR regs to 10
From: Nadav Amit <namit@xxxxxxxxxxxxxxxxx>
commit 682367c494869008eb89ef733f196e99415ae862 upstream.
Recent Intel CPUs have 10 variable range MTRRs. Since operating systems
sometime make assumptions on CPUs while they ignore capability MSRs, it is
better for KVM to be consistent with recent CPUs. Reporting more MTRRs than
actually supported has no functional implications.
Signed-off-by: Nadav Amit <namit@xxxxxxxxxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/include/asm/kvm_host.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -102,7 +102,7 @@
#define KVM_REFILL_PAGES 25
#define KVM_MAX_CPUID_ENTRIES 80
#define KVM_NR_FIXED_MTRR_REGION 88
-#define KVM_NR_VAR_MTRR 8
+#define KVM_NR_VAR_MTRR 10
#define ASYNC_PF_PER_VCPU 64
Patches currently in stable-queue which might be from namit@xxxxxxxxxxxxxxxxx are
queue-3.4/kvm-x86-increase-the-number-of-fixed-mtrr-regs-to-10.patch
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