diff options
| author | Gleb Natapov <gleb@redhat.com> | 2010-03-18 15:20:09 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2010-05-17 12:16:03 +0300 |
| commit | ab8557b2b361c8bb2e2421c791c8f6c4f6ba3d08 (patch) | |
| tree | b43df99f13219901306c227a4c61c99a67c4afbf /arch/x86/kvm/emulate.c | |
| parent | 6e1e5ffee8d95f9bce71eaa029cb5247b0f2f673 (diff) | |
| download | op-kernel-dev-ab8557b2b361c8bb2e2421c791c8f6c4f6ba3d08.zip op-kernel-dev-ab8557b2b361c8bb2e2421c791c8f6c4f6ba3d08.tar.gz | |
KVM: x86 emulator: 0f (20|21|22|23) ignore mod bits.
Resent spec says that for 0f (20|21|22|23) the 2 bits in the mod field
are ignored. Interestingly enough older spec says that 11 is only valid
encoding.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'arch/x86/kvm/emulate.c')
| -rw-r--r-- | arch/x86/kvm/emulate.c | 8 |
1 files changed, 0 insertions, 8 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 7c7debb..fa4604e 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -2520,28 +2520,20 @@ twobyte_insn: c->dst.type = OP_NONE; break; case 0x20: /* mov cr, reg */ - if (c->modrm_mod != 3) - goto cannot_emulate; c->regs[c->modrm_rm] = ops->get_cr(c->modrm_reg, ctxt->vcpu); c->dst.type = OP_NONE; /* no writeback */ break; case 0x21: /* mov from dr to reg */ - if (c->modrm_mod != 3) - goto cannot_emulate; if (emulator_get_dr(ctxt, c->modrm_reg, &c->regs[c->modrm_rm])) goto cannot_emulate; rc = X86EMUL_CONTINUE; c->dst.type = OP_NONE; /* no writeback */ break; case 0x22: /* mov reg, cr */ - if (c->modrm_mod != 3) - goto cannot_emulate; ops->set_cr(c->modrm_reg, c->modrm_val, ctxt->vcpu); c->dst.type = OP_NONE; break; case 0x23: /* mov from reg to dr */ - if (c->modrm_mod != 3) - goto cannot_emulate; if (emulator_set_dr(ctxt, c->modrm_reg, c->regs[c->modrm_rm])) goto cannot_emulate; rc = X86EMUL_CONTINUE; |
