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| author |   Zhenzhong Duan <zhenzhong.duan@intel.com> | 2022-03-11 18:26:43 +0800 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2022-04-02 05:37:26 -0400 |
| commit | 4335edbbc1284259b17590f76a21fd4a162b4305 (patch) | |
| tree | 76a329197cd01455b867b9c66e6113baeafc26d7 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | KVM: x86: cleanup enter_rmode() (diff) | |
| download | wireguard-linux-4335edbbc1284259b17590f76a21fd4a162b4305.tar.xz wireguard-linux-4335edbbc1284259b17590f76a21fd4a162b4305.zip | |
KVM: x86: Remove redundant vm_entry_controls_clearbit() call
When emulating exit from long mode, EFER_LMA is cleared with
vmx_set_efer(). This will already unset the VM_ENTRY_IA32E_MODE control
bit as requested by SDM, so there is no need to unset VM_ENTRY_IA32E_MODE
again in exit_lmode() explicitly. In case EFER isn't supported by
hardware, long mode isn't supported, so exit_lmode() cannot be reached.
Note that, thanks to the shadow controls mechanism, this change doesn't
eliminate vmread or vmwrite.
Signed-off-by: Zhenzhong Duan <zhenzhong.duan@intel.com>
Message-Id: <20220311102643.807507-3-zhenzhong.duan@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions