In commit 3af18d9c5fe9 ("KVM: nVMX: Prepare for using hardware MSR bitmap"),
we are setting MSR_BITMAP in prepare_vmcs02 if we should use hardware. This
is not enough since the field will be modified by following vmx_set_efer.Fix this by setting vmx_msr_bitmap_nested in vmx_set_msr_bitmap if vcpu is in guest mode. Signed-off-by: Wincy Van <[email protected]> --- arch/x86/kvm/vmx.c | 11 +++++++---- 1 files changed, 7 insertions(+), 4 deletions(-) diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index f7b20b4..10a481b 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -2168,7 +2168,10 @@ static void vmx_set_msr_bitmap(struct kvm_vcpu *vcpu) { unsigned long *msr_bitmap; - if (irqchip_in_kernel(vcpu->kvm) && apic_x2apic_mode(vcpu->arch.apic)) { + if (is_guest_mode(vcpu)) + msr_bitmap = vmx_msr_bitmap_nested; + else if (irqchip_in_kernel(vcpu->kvm) && + apic_x2apic_mode(vcpu->arch.apic)) { if (is_long_mode(vcpu)) msr_bitmap = vmx_msr_bitmap_longmode_x2apic; else @@ -9218,9 +9221,9 @@ static void prepare_vmcs02(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) } if (cpu_has_vmx_msr_bitmap() && - exec_control & CPU_BASED_USE_MSR_BITMAPS && - nested_vmx_merge_msr_bitmap(vcpu, vmcs12)) { - vmcs_write64(MSR_BITMAP, __pa(vmx_msr_bitmap_nested)); + exec_control & CPU_BASED_USE_MSR_BITMAPS) { + nested_vmx_merge_msr_bitmap(vcpu, vmcs12); + /* MSR_BITMAP will be set by following vmx_set_efer. */ } else exec_control &= ~CPU_BASED_USE_MSR_BITMAPS; -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
