queue-5.0/kvm-nvmx-remove-a-rogue-rax-clobber-from-nested_vmx_check_vmentry_hw.patch

   1 From 9ce0a07a6f49822238fd4357c02e0dba060a43cc Mon Sep 17 00:00:00 2001
   2 From: Sean Christopherson <sean.j.christopherson@intel.com>
   3 Date: Fri, 25 Jan 2019 07:40:55 -0800
   4 Subject: KVM: nVMX: Remove a rogue "rax" clobber from nested_vmx_check_vmentry_hw()
   5
   6 From: Sean Christopherson <sean.j.christopherson@intel.com>
   7
   8 commit 9ce0a07a6f49822238fd4357c02e0dba060a43cc upstream.
   9
  10 RAX is not touched by nested_vmx_check_vmentry_hw(), directly or
  11 indirectly (e.g. vmx_vmenter()).  Remove it from the clobber list.
  12
  13 Fixes: 52017608da33 ("KVM: nVMX: add option to perform early consistency checks via H/W")
  14 Reviewed-by: Jim Mattson <jmattson@google.com>
  15 Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
  16 Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
  17 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  18
  19 ---
  20  arch/x86/kvm/vmx/nested.c |    2 +-
  21  1 file changed, 1 insertion(+), 1 deletion(-)
  22
  23 --- a/arch/x86/kvm/vmx/nested.c
  24 +++ b/arch/x86/kvm/vmx/nested.c
  25 @@ -2793,7 +2793,7 @@ static int nested_vmx_check_vmentry_hw(s
  26                 [fail]"i"(offsetof(struct vcpu_vmx, fail)),
  27                 [host_rsp]"i"(offsetof(struct vcpu_vmx, host_rsp)),
  28                 [wordsize]"i"(sizeof(ulong))
  29 -             : "rax", "cc", "memory"
  30 +             : "cc", "memory"
  31         );
  32
  33         preempt_enable();