diff options
author | Sean Christopherson <seanjc@google.com> | 2021-07-13 09:33:00 -0700 |
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committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-02 11:01:53 -0400 |
commit | 4f0dcb544038e016277fb691f1e60d52d7448cf6 (patch) | |
tree | 92f22f6365a393e924cb7f04d0ecb05305c78fef /tools/perf/scripts/python/export-to-postgresql.py | |
parent | ee5a5584cba316bc90bc2fad0c6d10b71f1791cb (diff) |
KVM: VMX: Remove direct write to vcpu->arch.cr0 during vCPU RESET/INIT
Remove a bogus write to vcpu->arch.cr0 that immediately precedes
vmx_set_cr0() during vCPU RESET/INIT. For RESET, this is a nop since
the "old" CR0 value is meaningless. But for INIT, if the vCPU is coming
from paging enabled mode, crushing vcpu->arch.cr0 will cause the various
is_paging() checks in vmx_set_cr0() to get false negatives.
For the exit_lmode() case, the false negative is benign as vmx_set_efer()
is called immediately after vmx_set_cr0().
For EPT without unrestricted guest, the false negative will cause KVM to
unnecessarily run with CR3 load/store exiting. But again, this is
benign, albeit sub-optimal.
Reviewed-by: Reiji Watanabe <reijiw@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210713163324.627647-23-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions