diff options
| author | Gleb Natapov <gleb@redhat.com> | 2010-03-19 15:47:30 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-04-26 07:41:20 -0700 |
| commit | 10a505e60e897f3f4efaf8dbe9db40b3cdca23b4 (patch) | |
| tree | 79b8567764b7e69b569769be99f30830e3aeda5c /arch/x86/kvm/x86.c | |
| parent | 5774cdfd3d81b8ce75be512c180dd7bd5bf5b81c (diff) | |
KVM: x86 emulator: Add Virtual-8086 mode of emulation
commit a0044755679f3e761b8b95995e5f2db2b7efd0f6 upstream
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>
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'arch/x86/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index e78d9907e0e..d88fd6fe62b 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -2828,8 +2828,9 @@ int emulate_instruction(struct kvm_vcpu *vcpu, vcpu->arch.emulate_ctxt.vcpu = vcpu; vcpu->arch.emulate_ctxt.eflags = kvm_x86_ops->get_rflags(vcpu); vcpu->arch.emulate_ctxt.mode = + (!(vcpu->arch.cr0 & X86_CR0_PE)) ? X86EMUL_MODE_REAL : (vcpu->arch.emulate_ctxt.eflags & X86_EFLAGS_VM) - ? X86EMUL_MODE_REAL : cs_l + ? X86EMUL_MODE_VM86 : cs_l ? X86EMUL_MODE_PROT64 : cs_db ? X86EMUL_MODE_PROT32 : X86EMUL_MODE_PROT16; |