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| author | Paolo Bonzini <pbonzini@redhat.com> | 2021-09-23 12:46:07 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-10-01 03:37:34 -0400 |
| commit | 36e8194dcd749c2455d0fcbad43e719699691a11 (patch) | |
| tree | 106f72aeb5c1e2e53bfa5243e87bacb17afc9d47 /scripts/gdb/linux/tasks.py | |
| parent | 4c84926e229e0efdafa2756d7e6c4ae2fb0b7945 (diff) | |
KVM: x86: SVM: don't set VMLOAD/VMSAVE intercepts on vCPU reset
Commit adc2a23734ac ("KVM: nSVM: improve SYSENTER emulation on AMD"),
made init_vmcb set vmload/vmsave intercepts unconditionally,
and relied on svm_vcpu_after_set_cpuid to clear them when possible.
However init_vmcb is also called when the vCPU is reset, and it is
not followed by another call to svm_vcpu_after_set_cpuid because
the CPUID is already set. This mistake makes the VMSAVE/VMLOAD intercept
to be set when it is not needed, and harms performance of the nested
guest.
Extract the relevant parts of svm_vcpu_after_set_cpuid so that they
can be called again on reset.
Fixes: adc2a23734ac ("KVM: nSVM: improve SYSENTER emulation on AMD")
Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'scripts/gdb/linux/tasks.py')
0 files changed, 0 insertions, 0 deletions