]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
KVM: VMX: Do not advertise RDPID if ENABLE_RDTSCP control is unsupported
authorSean Christopherson <seanjc@google.com>
Tue, 4 May 2021 17:17:20 +0000 (10:17 -0700)
committerPaolo Bonzini <pbonzini@redhat.com>
Fri, 7 May 2021 10:06:15 +0000 (06:06 -0400)
commit8aec21c04caa2000f91cf8822ae0811e4b0c3971
tree60f93738d8afd8818c2c47ed8646950b370acc69
parent809c79137a192d7e881a517f803ebbf96305f066
KVM: VMX: Do not advertise RDPID if ENABLE_RDTSCP control is unsupported

Clear KVM's RDPID capability if the ENABLE_RDTSCP secondary exec control is
unsupported.  Despite being enumerated in a separate CPUID flag, RDPID is
bundled under the same VMCS control as RDTSCP and will #UD in VMX non-root
if ENABLE_RDTSCP is not enabled.

Fixes: 41cd02c6f7f6 ("kvm: x86: Expose RDPID in KVM_GET_SUPPORTED_CPUID")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210504171734.1434054-2-seanjc@google.com>
Reviewed-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/vmx/vmx.c