From 6c44221b05236cc65d76cb5dc2463f738edff39d Mon Sep 17 00:00:00 2001 From: Uros Bizjak Date: Thu, 29 Oct 2020 15:04:57 +0100 Subject: [PATCH] KVM/VMX: Use TEST %REG,%REG instead of CMP $0,%REG in vmenter.S Saves one byte in __vmx_vcpu_run for the same functionality. Cc: Paolo Bonzini Cc: Sean Christopherson Signed-off-by: Uros Bizjak Message-Id: <20201029140457.126965-1-ubizjak@gmail.com> Signed-off-by: Paolo Bonzini --- arch/x86/kvm/vmx/vmenter.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kvm/vmx/vmenter.S b/arch/x86/kvm/vmx/vmenter.S index 90ad7a6246e3..e85aa5faa22d 100644 --- a/arch/x86/kvm/vmx/vmenter.S +++ b/arch/x86/kvm/vmx/vmenter.S @@ -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 -- 2.25.1