KVM: x86 emulator: handle "far address" source operand

ljmp/lcall instruction operand contains address and segment.
It can be 10 bytes long. Currently we decode it as two different
operands. Fix it by introducing new kind of operand that can hold
entire far address.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 5 insertions, 1 deletions

diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h
index 288cbedcab1c..69a64a6a36f4 100644
--- a/arch/x86/include/asm/kvm_emulate.h
+++ b/arch/x86/include/asm/kvm_emulate.h
@@ -143,7 +143,11 @@ struct x86_emulate_ops {
 struct operand {
         enum { OP_REG, OP_MEM, OP_IMM, OP_NONE } type;
         unsigned int bytes;
-        unsigned long val, orig_val, *ptr;
+        unsigned long orig_val, *ptr;
+        union {
+                unsigned long val;
+                char valptr[sizeof(unsigned long) + 2];
+        };
 };
 
 struct fetch_cache {