diff options
| author | Peter Xu <peterx@redhat.com> | 2020-10-05 22:55:31 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-19 19:22:52 +0300 |
| commit | 628ade2d0816b2675ab61ba6aadfc9a94e3e1589 (patch) | |
| tree | 6aa8526f2ec381f6358b8d419c41863d5d42cd36 | |
| parent | 6a2e0923b2df5c00d1c691b0393daf1a87ffb924 (diff) | |
| download | linux-628ade2d0816b2675ab61ba6aadfc9a94e3e1589.tar.xz | |
KVM: VMX: Fix x2APIC MSR intercept handling on !APICV platforms
Fix an inverted flag for intercepting x2APIC MSRs and intercept writes
by default, even when APICV is enabled.
Fixes: 3eb900173c71 ("KVM: x86: VMX: Prevent MSR passthrough when MSR access is denied")
Co-developed-by: Peter Xu <peterx@redhat.com>
[sean: added changelog]
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20201005195532.8674-2-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
| -rw-r--r-- | arch/x86/kvm/vmx/vmx.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c index f7b6677e2a51..4797ec92c88c 100644 --- a/arch/x86/kvm/vmx/vmx.c +++ b/arch/x86/kvm/vmx/vmx.c @@ -3787,9 +3787,10 @@ static void vmx_update_msr_bitmap_x2apic(struct kvm_vcpu *vcpu, u8 mode) int msr; for (msr = 0x800; msr <= 0x8ff; msr++) { - bool intercepted = !!(mode & MSR_BITMAP_MODE_X2APIC_APICV); + bool apicv = !!(mode & MSR_BITMAP_MODE_X2APIC_APICV); - vmx_set_intercept_for_msr(vcpu, msr, MSR_TYPE_RW, intercepted); + vmx_set_intercept_for_msr(vcpu, msr, MSR_TYPE_R, !apicv); + vmx_set_intercept_for_msr(vcpu, msr, MSR_TYPE_W, true); } if (mode & MSR_BITMAP_MODE_X2APIC) { |