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| author |   Sean Christopherson <seanjc@google.com> | 2022-01-20 01:07:18 +0000 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-01-26 12:15:01 -0500 |
| commit | 3280cc22aea74d78ebbea277ff8bc8d593582de3 (patch) | |
| tree | de291251903e4c7c7af2d79f7069976690d96b1e /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | KVM: SVM: Inject #UD on attempted emulation for SEV guest w/o insn buffer (diff) | |
| download | wireguard-linux-3280cc22aea74d78ebbea277ff8bc8d593582de3.tar.xz wireguard-linux-3280cc22aea74d78ebbea277ff8bc8d593582de3.zip | |
KVM: SVM: Don't apply SEV+SMAP workaround on code fetch or PT access
Resume the guest instead of synthesizing a triple fault shutdown if the
instruction bytes buffer is empty due to the #NPF being on the code fetch
itself or on a page table access. The SMAP errata applies if and only if
the code fetch was successful and ucode's subsequent data read from the
code page encountered a SMAP violation. In practice, the guest is likely
hosed either way, but crashing the guest on a code fetch to emulated MMIO
is technically wrong according to the behavior described in the APM.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Liam Merwick <liam.merwick@oracle.com>
Message-Id: <20220120010719.711476-9-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions