From: Uros Bizjak <ubizjak@gmail.com>
Date: Thu, 9 Apr 2020 12:04:40 +0000 (+0200)
Subject: KVM: SVM: Do not setup frame pointer in __svm_vcpu_run
X-Git-Tag: v5.7-rc3~39^2~6
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=b61f62d408959a37bb6b19f9521b682aec3a5601;p=thirdparty%2Fkernel%2Flinux.git

KVM: SVM: Do not setup frame pointer in __svm_vcpu_run

__svm_vcpu_run is a leaf function and does not need
a frame pointer.  %rbp is also destroyed a few instructions
later when guest registers are loaded.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Uros Bizjak <ubizjak@gmail.com>
Message-Id: <20200409120440.1427215-1-ubizjak@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
---

diff --git a/arch/x86/kvm/svm/vmenter.S b/arch/x86/kvm/svm/vmenter.S
index 723887e35e954..bf944334003ae 100644
--- a/arch/x86/kvm/svm/vmenter.S
+++ b/arch/x86/kvm/svm/vmenter.S
@@ -36,7 +36,6 @@
  */
 SYM_FUNC_START(__svm_vcpu_run)
 	push %_ASM_BP
-	mov  %_ASM_SP, %_ASM_BP
 #ifdef CONFIG_X86_64
 	push %r15
 	push %r14