diff options
| author | Sean Christopherson <seanjc@google.com> | 2025-09-18 17:59:52 -0700 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2025-10-17 15:11:26 -0700 |
| commit | ae8e6ad84177456d8810a8ff3a5cf3f477fb0721 (patch) | |
| tree | 893d1c1b56820904ed1ba41b6e67ae538c2a74dd | |
| parent | 15fe455dd1a011bbc8f9e512c6dc324cfca028c4 (diff) | |
KVM: nVMX: Add consistency check for TSC_MULTIPLIER=0
Add a missing consistency check on the TSC Multiplier being '0'. Per the
SDM:
If the "use TSC scaling" VM-execution control is 1, the TSC-multiplier
must not be zero.
Fixes: d041b5ea9335 ("KVM: nVMX: Enable nested TSC scaling")
Link: https://lore.kernel.org/r/20250919005955.1366256-7-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
| -rw-r--r-- | arch/x86/kvm/vmx/nested.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/x86/kvm/vmx/nested.c b/arch/x86/kvm/vmx/nested.c index ffd2628b9c1e..77b5f75cc2bb 100644 --- a/arch/x86/kvm/vmx/nested.c +++ b/arch/x86/kvm/vmx/nested.c @@ -2962,6 +2962,10 @@ static int nested_check_vm_execution_controls(struct kvm_vcpu *vcpu, } } + if (nested_cpu_has2(vmcs12, SECONDARY_EXEC_TSC_SCALING) && + CC(!vmcs12->tsc_multiplier)) + return -EINVAL; + return 0; } |