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| author | Sean Christopherson <seanjc@google.com> | 2024-02-23 23:42:29 +0300 |
|---|---|---|
| committer | Sean Christopherson <seanjc@google.com> | 2024-04-09 20:20:29 +0300 |
| commit | 87e8e360a05fd29465691aeac179bcf585600c59 (patch) | |
| tree | c25f5a7952d14b51a7954d02ffc0f24781951f8f /arch/x86/kvm/svm/svm.c | |
| parent | 331282fdb15edaf1beb1d27a64d3f65a34d7394d (diff) | |
| download | linux-87e8e360a05fd29465691aeac179bcf585600c59.tar.xz | |
KVM: SVM: Clobber RAX instead of RBX when discarding spec_ctrl_intercepted
POP @spec_ctrl_intercepted into RAX instead of RBX when discarding it from
the stack so that __svm_sev_es_vcpu_run() doesn't modify any non-volatile
registers. __svm_sev_es_vcpu_run() doesn't return a value, and RAX is
already are clobbered multiple times in the #VMEXIT path.
This will allowing using the host save area to save/restore non-volatile
registers in __svm_sev_es_vcpu_run().
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/20240223204233.3337324-5-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
Diffstat (limited to 'arch/x86/kvm/svm/svm.c')
0 files changed, 0 insertions, 0 deletions