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| author | Tom Lendacky <thomas.lendacky@amd.com> | 2020-12-10 11:10:07 -0600 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-12-15 05:20:59 -0500 |
| commit | 861377730aa9db4cbaa0f3bd3f4d295c152732c4 (patch) | |
| tree | 7f0de7b0c4052e642c37a0e2c28193b164787999 /tools/perf/scripts/python/stackcollapse.py | |
| parent | 376c6d285017419e35c7177bc60abe7915fb7497 (diff) | |
KVM: SVM: Provide support for SEV-ES vCPU loading
An SEV-ES vCPU requires additional VMCB vCPU load/put requirements. SEV-ES
hardware will restore certain registers on VMEXIT, but not save them on
VMRUN (see Table B-3 and Table B-4 of the AMD64 APM Volume 2), so make the
following changes:
General vCPU load changes:
- During vCPU loading, perform a VMSAVE to the per-CPU SVM save area and
save the current values of XCR0, XSS and PKRU to the per-CPU SVM save
area as these registers will be restored on VMEXIT.
General vCPU put changes:
- Do not attempt to restore registers that SEV-ES hardware has already
restored on VMEXIT.
Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com>
Message-Id: <019390e9cb5e93cd73014fa5a040c17d42588733.1607620209.git.thomas.lendacky@amd.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/stackcollapse.py')
0 files changed, 0 insertions, 0 deletions