[Xen-devel] [PATCH 6/6] x86/vmx: Drop VMX signal for full real-mode

[Andrew Cooper <andrew.cooper3@xxxxxxxxxx>]

The hvmloader code which used this signal was deleted 10 years ago (c/s
50b12df83 "x86 vmx: Remove vmxassist").  Furthermore, the value gets discarded
anyway because the HVM domain builder unconditionally sets %rax to 0 in the
same action it uses to set %rip to the appropriate entrypoint.

Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
---
CC: Jan Beulich <JBeulich@xxxxxxxx>
CC: Jun Nakajima <jun.nakajima@xxxxxxxxx>
CC: Kevin Tian <kevin.tian@xxxxxxxxx>
CC: Roger Pau Monné <roger.pau@xxxxxxxxxx>
CC: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 xen/arch/x86/hvm/vmx/vmx.c | 4 ----
 1 file changed, 4 deletions(-)

diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c
index 8049264..4318b15 100644
--- a/xen/arch/x86/hvm/vmx/vmx.c
+++ b/xen/arch/x86/hvm/vmx/vmx.c
@@ -462,10 +462,6 @@ static int vmx_vcpu_initialise(struct vcpu *v)
 
     vmx_install_vlapic_mapping(v);
 
-    /* %eax == 1 signals full real-mode support to the guest loader. */
-    if ( v->vcpu_id == 0 )
-        v->arch.user_regs.rax = 1;
-
     return 0;
 }
 
-- 
2.1.4


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