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KVM/VMX: Use TEST %REG,%REG instead of CMP $0,%REG in vmenter.S

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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>
This commit is contained in:
Uros Bizjak 2020-10-29 15:04:57 +01:00 committed by Paolo Bonzini
parent f57ad63a83
commit 6c44221b05
1 changed files with 1 additions and 1 deletions
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2
arch/x86/kvm/vmx/vmenter.S
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@ -132,7 +132,7 @@ SYM_FUNC_START(__vmx_vcpu_run)
mov (%_ASM_SP), %_ASM_AX
/* Check if vmlaunch or vmresume is needed */
cmpb $0, %bl
testb %bl, %bl
/* Load guest registers. Don't clobber flags. */
mov VCPU_RCX(%_ASM_AX), %_ASM_CX