KVM/VMX: Use TEST %REG,%REG instead of CMP $0,%REG in vmenter.S
commit 6c44221b05236cc65d76cb5dc2463f738edff39d upstream. Saves one byte in __vmx_vcpu_run for the same functionality. Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Uros Bizjak <ubizjak@gmail.com> Message-Id: <20201029140457.126965-1-ubizjak@gmail.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@canonical.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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@ -135,7 +135,7 @@ ENTRY(__vmx_vcpu_run)
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mov (%_ASM_SP), %_ASM_AX
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mov (%_ASM_SP), %_ASM_AX
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/* Check if vmlaunch or vmresume is needed */
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/* Check if vmlaunch or vmresume is needed */
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cmpb $0, %bl
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testb %bl, %bl
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/* Load guest registers. Don't clobber flags. */
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/* Load guest registers. Don't clobber flags. */
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mov VCPU_RBX(%_ASM_AX), %_ASM_BX
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mov VCPU_RBX(%_ASM_AX), %_ASM_BX
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