diff options
| author | Jim Mattson <jmattson@google.com> | 2017-08-24 23:24:47 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-08-25 13:34:16 +0300 |
| commit | 712b12d72451411c40e39d25e2140fb8c7fd0e49 (patch) | |
| tree | 5ac2010671ab813257bc985d694adafde9844946 /arch/x86/kvm | |
| parent | bfcf83b1444d90f6e680a0dde0916f3b289b5066 (diff) | |
| download | linux-712b12d72451411c40e39d25e2140fb8c7fd0e49.tar.xz | |
kvm: nVMX: Validate the virtual-APIC address on nested VM-entry
According to the SDM, if the "use TPR shadow" VM-execution control is
1, bits 11:0 of the virtual-APIC address must be 0 and the address
should set any bits beyond the processor's physical-address width.
Signed-off-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/vmx.c | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index e0d2ca092788..ec6b1932dea9 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -9993,6 +9993,18 @@ static int nested_vmx_check_msr_bitmap_controls(struct kvm_vcpu *vcpu, return 0; } +static int nested_vmx_check_tpr_shadow_controls(struct kvm_vcpu *vcpu, + struct vmcs12 *vmcs12) +{ + if (!nested_cpu_has(vmcs12, CPU_BASED_TPR_SHADOW)) + return 0; + + if (!page_address_valid(vcpu, vmcs12->virtual_apic_page_addr)) + return -EINVAL; + + return 0; +} + /* * Merge L0's and L1's MSR bitmap, return false to indicate that * we do not use the hardware. @@ -10680,6 +10692,9 @@ static int check_vmentry_prereqs(struct kvm_vcpu *vcpu, struct vmcs12 *vmcs12) if (nested_vmx_check_msr_bitmap_controls(vcpu, vmcs12)) return VMXERR_ENTRY_INVALID_CONTROL_FIELD; + if (nested_vmx_check_tpr_shadow_controls(vcpu, vmcs12)) + return VMXERR_ENTRY_INVALID_CONTROL_FIELD; + if (nested_vmx_check_apicv_controls(vcpu, vmcs12)) return VMXERR_ENTRY_INVALID_CONTROL_FIELD; |