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| author |   Sean Christopherson <sean.j.christopherson@intel.com> | 2019-12-10 14:44:15 -0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2020-01-21 13:58:10 +0100 |
| commit | 96be4e069c938e4a5fc7125de7e1cc7089b1adef (patch) | |
| tree | 954b6bced81f4878ee3412394684286b0361006e /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | KVM: x86: Ensure all logical CPUs have consistent reserved cr4 bits (diff) | |
| download | linux-dev-96be4e069c938e4a5fc7125de7e1cc7089b1adef.tar.xz linux-dev-96be4e069c938e4a5fc7125de7e1cc7089b1adef.zip | |
KVM: x86: Drop special XSAVE handling from guest_cpuid_has()
Now that KVM prevents setting host-reserved CR4 bits, drop the dedicated
XSAVE check in guest_cpuid_has() in favor of open coding similar checks
in the SVM/VMX XSAVES enabling flows.
Note, checking boot_cpu_has(X86_FEATURE_XSAVE) in the XSAVES flows is
technically redundant with respect to the CR4 reserved bit checks, e.g.
XSAVES #UDs if CR4.OSXSAVE=0 and arch.xsaves_enabled is consumed if and
only if CR4.OXSAVE=1 in guest. Keep (add?) the explicit boot_cpu_has()
checks to help document KVM's usage of arch.xsaves_enabled.
No functional change intended.
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions