At IOPL 3 CR4.VME is irrelevant.
Reported-by: Andrew Cooper <[email protected]>
Signed-off-by: Jan Beulich <[email protected]>
---
v2: New.
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -4047,7 +4047,8 @@ x86_emulate(
if ( op_bytes == 2 )
{
dst.val = (uint16_t)dst.val | (_regs.eflags & 0xffff0000u);
- if ( cr4 & X86_CR4_VME )
+ if ( (cr4 & X86_CR4_VME) &&
+ MASK_EXTR(_regs.eflags, X86_EFLAGS_IOPL) != 3 )
{
if ( dst.val & X86_EFLAGS_IF )
{
_______________________________________________
Xen-devel mailing list
[email protected]
https://lists.xenproject.org/mailman/listinfo/xen-devel
