On Sat, Mar 26, 2011 at 11:43:47AM +0200, Avi Kivity wrote: > On 03/25/2011 11:29 AM, Joerg Roedel wrote: >> This patch add intercept checks into the KVM instruction >> emulator to check for the 8 instructions that access the >> descriptor table addresses. >> >> >> +static struct opcode group6[] = { >> + DI(ModRM, sldt), >> + DI(ModRM, str), >> + DI(ModRM | Priv, lldt), >> + DI(ModRM | Priv, ltr), >> + N, N, N, N, >> +}; >> + >> static struct group_dual group7 = { { >> - N, N, DI(ModRM | SrcMem | Priv, lgdt), DI(ModRM | SrcMem | Priv, lidt), >> + DI(ModRM | DstMem | Priv, sgdt), DI(ModRM | DstMem | Priv, sidt), >> + DI(ModRM | SrcMem | Priv, lgdt), DI(ModRM | SrcMem | Priv, lidt), >> DI(SrcNone | ModRM | DstMem | Mov, smsw), N, >> DI(SrcMem16 | ModRM | Mov | Priv, lmsw), >> DI(SrcMem | ModRM | ByteOp | Priv | NoAccess, invlpg), > > You're adding decode info for instructions that aren't emulated. Safe > AFAICT because of 'default: goto cannot_emulate', I guess. Right, all that can happen is that the nested guest shoot itself in the foot by getting an #UD. Same for the SVM instructions. Joerg -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html