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 723887e35e95411585ddefbecc1ff6f6e15740b1..bf944334003aefa2cc5f1ffe3de34e61a1e6ceb3 100644 (file)
--- 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