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authorGleb Natapov <gleb@redhat.com>2010-02-10 14:21:31 +0200
committerMarcelo Tosatti <mtosatti@redhat.com>2010-03-01 12:36:11 -0300
commita0044755679f3e761b8b95995e5f2db2b7efd0f6 (patch)
tree3a4db9d3e0512109130c2f4f1f425305378c0a27 /arch/x86/include/asm/kvm_emulate.h
parent60a29d4ea4e7b6b95d9391ebc8625b0426f3a363 (diff)
KVM: x86 emulator: Add Virtual-8086 mode of emulation
For some instructions CPU behaves differently for real-mode and virtual 8086. Let emulator know which mode cpu is in, so it will not poke into vcpu state directly. Signed-off-by: Gleb Natapov <gleb@redhat.com> Cc: stable@kernel.org Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_emulate.h')
-rw-r--r--arch/x86/include/asm/kvm_emulate.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h
index 9b697c2735d..784d7c586d8 100644
--- a/arch/x86/include/asm/kvm_emulate.h
+++ b/arch/x86/include/asm/kvm_emulate.h
@@ -168,6 +168,7 @@ struct x86_emulate_ctxt {
/* Execution mode, passed to the emulator. */
#define X86EMUL_MODE_REAL 0 /* Real mode. */
+#define X86EMUL_MODE_VM86 1 /* Virtual 8086 mode. */
#define X86EMUL_MODE_PROT16 2 /* 16-bit protected mode. */
#define X86EMUL_MODE_PROT32 4 /* 32-bit protected mode. */
#define X86EMUL_MODE_PROT64 8 /* 64-bit (long) mode. */