This is a note to let you know that I've just added the patch titled
KVM: X86: Fix MSR range of APIC registers in X2APIC mode
to the 4.19-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-fix-msr-range-of-apic-registers-in-x2apic-mode.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From bf10bd0be53282183f374af23577b18b5fbf7801 Mon Sep 17 00:00:00 2001
From: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
Date: Tue, 16 Jun 2020 15:33:07 +0800
Subject: KVM: X86: Fix MSR range of APIC registers in X2APIC mode
From: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
commit bf10bd0be53282183f374af23577b18b5fbf7801 upstream.
Only MSR address range 0x800 through 0x8ff is architecturally reserved
and dedicated for accessing APIC registers in x2APIC mode.
Fixes: 0105d1a52640 ("KVM: x2apic interface to lapic")
Signed-off-by: Xiaoyao Li <xiaoyao.li@xxxxxxxxx>
Message-Id: <20200616073307.16440-1-xiaoyao.li@xxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Sean Christopherson <sean.j.christopherson@xxxxxxxxx>
Reviewed-by: Jim Mattson <jmattson@xxxxxxxxxx>
Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/x86/kvm/x86.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -2499,7 +2499,7 @@ int kvm_set_msr_common(struct kvm_vcpu *
return kvm_mtrr_set_msr(vcpu, msr, data);
case MSR_IA32_APICBASE:
return kvm_set_apic_base(vcpu, msr_info);
- case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
+ case APIC_BASE_MSR ... APIC_BASE_MSR + 0xff:
return kvm_x2apic_msr_write(vcpu, msr, data);
case MSR_IA32_TSCDEADLINE:
kvm_set_lapic_tscdeadline_msr(vcpu, data);
@@ -2797,7 +2797,7 @@ int kvm_get_msr_common(struct kvm_vcpu *
case MSR_IA32_APICBASE:
msr_info->data = kvm_get_apic_base(vcpu);
break;
- case APIC_BASE_MSR ... APIC_BASE_MSR + 0x3ff:
+ case APIC_BASE_MSR ... APIC_BASE_MSR + 0xff:
return kvm_x2apic_msr_read(vcpu, msr_info->index, &msr_info->data);
break;
case MSR_IA32_TSCDEADLINE:
Patches currently in stable-queue which might be from xiaoyao.li@xxxxxxxxx are
queue-4.19/kvm-x86-fix-msr-range-of-apic-registers-in-x2apic-mode.patch
