This distinguishes it from CMPXCHG8B.
Signed-off-by: Jan Beulich <jbeul...@suse.com>
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -5372,6 +5372,9 @@ x86_emulate(
if ( rex_prefix & REX_W )
{
host_and_vcpu_must_have(cx16);
+ generate_exception_if(!is_aligned(ea.mem.seg, ea.mem.off, 16,
+ ctxt, ops),
+ EXC_GP, 0);
op_bytes = 16;
}
else
x86emul: CMPXCHG16B requires an aligned operand
This distinguishes it from CMPXCHG8B.
Signed-off-by: Jan Beulich <jbeul...@suse.com>
--- a/xen/arch/x86/x86_emulate/x86_emulate.c
+++ b/xen/arch/x86/x86_emulate/x86_emulate.c
@@ -5372,6 +5372,9 @@ x86_emulate(
if ( rex_prefix & REX_W )
{
host_and_vcpu_must_have(cx16);
+ generate_exception_if(!is_aligned(ea.mem.seg, ea.mem.off, 16,
+ ctxt, ops),
+ EXC_GP, 0);
op_bytes = 16;
}
else
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