This is a note to let you know that I've just added the patch titled
Revert "KVM: x86: Increase the number of fixed MTRR regs to 10"
to the 3.16-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:
revert-kvm-x86-increase-the-number-of-fixed-mtrr-regs-to-10.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0d234daf7e0a3290a3a20c8087eefbd6335a5bd4 Mon Sep 17 00:00:00 2001
From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Date: Mon, 18 Aug 2014 16:39:48 +0200
Subject: Revert "KVM: x86: Increase the number of fixed MTRR regs to 10"
From: Paolo Bonzini <pbonzini@xxxxxxxxxx>
commit 0d234daf7e0a3290a3a20c8087eefbd6335a5bd4 upstream.
This reverts commit 682367c494869008eb89ef733f196e99415ae862,
which causes 32-bit SMP Windows 7 guests to panic.
SeaBIOS has a limit on the number of MTRRs that it can handle,
and this patch exceeded the limit. Better revert it.
Thanks to Nadav Amit for debugging the cause.
Reported-by: Wanpeng Li <wanpeng.li@xxxxxxxxxxxxxxx>
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
@@ -95,7 +95,7 @@ static inline gfn_t gfn_to_index(gfn_t g
#define KVM_REFILL_PAGES 25
#define KVM_MAX_CPUID_ENTRIES 80
#define KVM_NR_FIXED_MTRR_REGION 88
-#define KVM_NR_VAR_MTRR 10
+#define KVM_NR_VAR_MTRR 8
#define ASYNC_PF_PER_VCPU 64
Patches currently in stable-queue which might be from pbonzini@xxxxxxxxxx are
queue-3.16/kvm-nvmx-fix-acknowledge-interrupt-on-exit-when-apicv-is-in-use.patch
queue-3.16/kvm-iommu-fix-the-third-parameter-of-kvm_iommu_put_pages-cve-2014-3601.patch
queue-3.16/kvm-x86-always-exit-on-eois-for-interrupts-listed-in-the-ioapic-redir-table.patch
queue-3.16/kvm-x86-inter-privilege-level-ret-emulation-is-not-implemeneted.patch
queue-3.16/revert-kvm-x86-increase-the-number-of-fixed-mtrr-regs-to-10.patch
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