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KVM: VMX: Use RAX as the scratch register during vCPU-run
authorSean Christopherson <sean.j.christopherson@intel.com>
Fri, 25 Jan 2019 15:41:15 +0000 (07:41 -0800)
committerPaolo Bonzini <pbonzini@redhat.com>
Wed, 20 Feb 2019 21:48:15 +0000 (22:48 +0100)
commita62fd5a76c99dd96c74c6638408961b7ff3c71c4
tree04a1631f17bbfd156d6f1332103eedfcac56b973tree | snapshot
parentee2fc635ef714b1d46da3616bbec972067f0d187commit | diff
KVM: VMX: Use RAX as the scratch register during vCPU-run

...to prepare for making the sub-routine callable from C code.  That
means returning the result in RAX.  Since RAX will be used to return the
result, use it as the scratch register as well to make the code readable
and to document that the scratch register is more or less arbitrary.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
arch/x86/kvm/vmx/vmenter.S diff | blob | history
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