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authorSean Christopherson <sean.j.christopherson@intel.com>2019-01-25 07:41:11 -0800
committerPaolo Bonzini <pbonzini@redhat.com>2019-02-20 22:48:13 +0100
commit63c73aa07fcabc090661a586f7ae5200a0fc5cb4 (patch)
tree24043b078a88f836254fa056d6d35f3d3171850f
parentc14f9dd50b01b55834a757dd50af35b8e168512d (diff)
downloadlinux-stericsson-63c73aa07fcabc090661a586f7ae5200a0fc5cb4.tar.gz
KVM: VMX: Create a stack frame in vCPU-run
...in preparation for moving to a proper assembly sub-routnine. vCPU-run isn't a leaf function since it calls vmx_update_host_rsp() and vmx_vmenter(). And since we need to save/restore RBP anyways, unconditionally creating the frame costs a single MOV, i.e. don't bother keying off CONFIG_FRAME_POINTER or using FRAME_BEGIN, etc... Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r--arch/x86/kvm/vmx/vmx.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index 12fb342218ad..52fea89732db 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -6407,8 +6407,8 @@ static void __vmx_vcpu_run(struct kvm_vcpu *vcpu, struct vcpu_vmx *vmx)
write_cr2(vcpu->arch.cr2);
asm(
- /* Store host registers */
"push %%" _ASM_BP " \n\t"
+ "mov %%" _ASM_SP ", %%" _ASM_BP " \n\t"
/*
* Save @regs, _ASM_ARG2 may be modified by vmx_update_host_rsp() and