KVM: VMX: Check KVM CPU caps, not just VMX MSR support, for XSAVE enabling

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Check KVM CPU capabilities instead of raw VMX support for XSAVES when
determining whether or not XSAVER can/should be exposed to the guest.
Practically speaking, it's nonsensical/impossible for a CPU to support
"enable XSAVES" without XSAVES being supported natively.  The real
motivation for checking kvm_cpu_cap_has() is to allow using the governed
feature's standard check-and-set logic.

Reviewed-by: Yuan Yao <yuan.yao@intel.com>
Link: https://lore.kernel.org/r/20230815203653.519297-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Sean Christopherson 2023-08-15 13:36:42 -07:00

parent 1143c0b85c

commit 0497d2ac9b

1 changed files with 1 additions and 1 deletions

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arch/x86/kvm/vmx/vmx.c

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