Commit 57ba312f authored Oct 03, 2022 by Uros Bizjak Committed by Greg Kroah-Hartman Oct 07, 2022

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>

parent 87dfe68a

arch/x86/kvm/vmx/vmenter.S

+1 −1

Original line number	Diff line number	Diff line
		@@ -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