diff options
| author | Sean Christopherson <seanjc@google.com> | 2021-07-13 09:32:45 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-02 11:01:50 -0400 |
| commit | 61152cd907d59ffd6b0a9479b2fa3b3b7b080409 (patch) | |
| tree | 8cbb13ab0a5ad32036912b6cb0cff39aee4e4f06 /tools/perf/scripts/python/libxed.py | |
| parent | KVM: SVM: Fall back to KVM's hardcoded value for EDX at RESET/INIT (diff) | |
| download | linux-61152cd907d59ffd6b0a9479b2fa3b3b7b080409.tar.gz linux-61152cd907d59ffd6b0a9479b2fa3b3b7b080409.zip | |
KVM: VMX: Remove explicit MMU reset in enter_rmode()
Drop an explicit MMU reset when entering emulated real mode now that the
vCPU INIT/RESET path correctly handles conditional MMU resets, e.g. if
INIT arrives while the vCPU is in 64-bit mode.
Note, while there are multiple other direct calls to vmx_set_cr0(), i.e.
paths that change CR0 without invoking kvm_post_set_cr0(), only the INIT
emulation can reach enter_rmode(). CLTS emulation only toggles CR.TS,
VM-Exit (and late VM-Fail) emulation cannot architecturally transition to
Real Mode, and VM-Enter to Real Mode is possible if and only if
Unrestricted Guest is enabled (exposed to L1).
This effectively reverts commit 8668a3c468ed ("KVM: VMX: Reset mmu
context when entering real mode")
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210713163324.627647-8-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/libxed.py')
0 files changed, 0 insertions, 0 deletions