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

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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>
This commit is contained in:
Uros Bizjak 2022-10-03 10:10:25 -03:00 committed by Greg Kroah-Hartman
parent 87dfe68a35
commit 57ba312f10
1 changed files with 1 additions and 1 deletions
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arch/x86/kvm/vmx/vmenter.S
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@ -135,7 +135,7 @@ ENTRY(__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_RBX(%_ASM_AX), %_ASM_BX