On 10/22/2020 10:06 PM, Paolo Bonzini wrote:
On 22/10/20 15:31, Xiaoyao Li wrote:
It's common for userspace to copy all supported CPUID bits to
KVM_SET_CPUID2, I don't think this is the right behavior for
KVM_HINTS_REALTIME.
It reminds of X86_FEATURE_WAITPKG, which is added to supported CPUID
recently as a fix but QEMU exposes it to guest only when "-overcommit
cpu-pm"
WAITPKG is not included in KVM_GET_SUPPORTED_CPUID either. QEMU detects
it through the MSR_IA32_UMWAIT register.
Doesn't 0abcc8f65cc2 ("KVM: VMX: enable X86_FEATURE_WAITPKG in KVM
capabilities") add WAITPKG to KVM_GET_SUPPORTED_CPUID?
Paolo
