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authorSean Christopherson <sean.j.christopherson@intel.com>2019-01-25 07:41:20 -0800
committerPaolo Bonzini <pbonzini@redhat.com>2019-02-20 22:48:18 +0100
commit4f44c4eec5b72020c6d99e9e4f3d0505874c98c9 (patch)
tree8e012666bf201b1e18a8055dd0f43b461fe67742
parentfc2ba5a27a1aaa16b664e64f85e0e1307d2bde3a (diff)
downloadlinux-stericsson-4f44c4eec5b72020c6d99e9e4f3d0505874c98c9.tar.gz
KVM: VMX: Reorder clearing of registers in the vCPU-run assembly flow
Move the clearing of the common registers (not 64-bit-only) to the start of the flow that clears registers holding guest state. This is purely a cosmetic change so that the label doesn't point at a blank line and a #define. No functional change intended. 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/vmenter.S13
1 files changed, 6 insertions, 7 deletions
diff --git a/arch/x86/kvm/vmx/vmenter.S b/arch/x86/kvm/vmx/vmenter.S
index d325f1d6110b..7b272738c576 100644
--- a/arch/x86/kvm/vmx/vmenter.S
+++ b/arch/x86/kvm/vmx/vmenter.S
@@ -185,7 +185,12 @@ ENTRY(__vmx_vcpu_run)
* free. RSP and RAX are exempt as RSP is restored by hardware during
* VM-Exit and RAX is explicitly loaded with 0 or 1 to return VM-Fail.
*/
-1:
+1: xor %ebx, %ebx
+ xor %ecx, %ecx
+ xor %edx, %edx
+ xor %esi, %esi
+ xor %edi, %edi
+ xor %ebp, %ebp
#ifdef CONFIG_X86_64
xor %r8d, %r8d
xor %r9d, %r9d
@@ -196,12 +201,6 @@ ENTRY(__vmx_vcpu_run)
xor %r14d, %r14d
xor %r15d, %r15d
#endif
- xor %ebx, %ebx
- xor %ecx, %ecx
- xor %edx, %edx
- xor %esi, %esi
- xor %edi, %edi
- xor %ebp, %ebp
/* "POP" @regs. */
add $WORD_SIZE, %_ASM_SP