On Thu, Jun 20, 2013 at 11:30:45AM +0200, Borislav Petkov wrote:
> From: Borislav Petkov <bp@xxxxxxx>
>
> Call it EmulateOnUD which is exactly what we're trying to do with
> vendor-specific instructions.
>
> Signed-off-by: Borislav Petkov <bp@xxxxxxx>
> ---
> arch/x86/kvm/emulate.c | 14 +++++++-------
> 1 file changed, 7 insertions(+), 7 deletions(-)
>
> diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
> index d9aa9f8772f0..7872d9871fb7 100644
> --- a/arch/x86/kvm/emulate.c
> +++ b/arch/x86/kvm/emulate.c
> @@ -126,7 +126,7 @@
> #define Mov (1<<20)
> /* Misc flags */
> #define Prot (1<<21) /* instruction generates #UD if not in prot-mode */
> -#define VendorSpecific (1<<22) /* Vendor specific instruction */
> +#define EmulateOnUD (1<<22) /* Emulate if unsupported by the host */
> #define NoAccess (1<<23) /* Don't access memory (lea/invlpg/verr etc) */
> #define Op3264 (1<<24) /* Operand is 64b in long mode, 32b otherwise */
> #define Undefined (1<<25) /* No Such Instruction */
> @@ -3688,7 +3688,7 @@ static const struct opcode group7_rm1[] = {
>
> static const struct opcode group7_rm3[] = {
> DIP(SrcNone | Prot | Priv, vmrun, check_svme_pa),
> - II(SrcNone | Prot | VendorSpecific, em_vmmcall, vmmcall),
> + II(SrcNone | Prot | EmulateOnUD, em_vmmcall, vmmcall),
> DIP(SrcNone | Prot | Priv, vmload, check_svme_pa),
> DIP(SrcNone | Prot | Priv, vmsave, check_svme_pa),
> DIP(SrcNone | Prot | Priv, stgi, check_svme),
> @@ -3773,7 +3773,7 @@ static const struct group_dual group7 = { {
> II(SrcMem16 | Mov | Priv, em_lmsw, lmsw),
> II(SrcMem | ByteOp | Priv | NoAccess, em_invlpg, invlpg),
> }, {
> - I(SrcNone | Priv | VendorSpecific, em_vmcall),
> + I(SrcNone | Priv | EmulateOnUD, em_vmcall),
> EXT(0, group7_rm1),
> N, EXT(0, group7_rm3),
> II(SrcNone | DstMem | Mov, em_smsw, smsw), N,
> @@ -3995,7 +3995,7 @@ static const struct opcode opcode_table[256] = {
> static const struct opcode twobyte_table[256] = {
> /* 0x00 - 0x0F */
> G(0, group6), GD(0, &group7), N, N,
> - N, I(ImplicitOps | VendorSpecific, em_syscall),
> + N, I(ImplicitOps | EmulateOnUD, em_syscall),
> II(ImplicitOps | Priv, em_clts, clts), N,
> DI(ImplicitOps | Priv, invd), DI(ImplicitOps | Priv, wbinvd), N, N,
> N, D(ImplicitOps | ModRM), N, N,
> @@ -4015,8 +4015,8 @@ static const struct opcode twobyte_table[256] = {
> IIP(ImplicitOps, em_rdtsc, rdtsc, check_rdtsc),
> II(ImplicitOps | Priv, em_rdmsr, rdmsr),
> IIP(ImplicitOps, em_rdpmc, rdpmc, check_rdpmc),
> - I(ImplicitOps | VendorSpecific, em_sysenter),
> - I(ImplicitOps | Priv | VendorSpecific, em_sysexit),
> + I(ImplicitOps | EmulateOnUD, em_sysenter),
> + I(ImplicitOps | Priv | EmulateOnUD, em_sysexit),
> N, N,
> N, N, N, N, N, N, N, N,
> /* 0x40 - 0x4F */
> @@ -4435,7 +4435,7 @@ done_prefixes:
> if (ctxt->d == 0 || (ctxt->d & NotImpl))
> return EMULATION_FAILED;
>
> - if (!(ctxt->d & VendorSpecific) && ctxt->only_vendor_specific_insn)
> + if (!(ctxt->d & EmulateOnUD) && ctxt->only_vendor_specific_insn)
Lets rename only_vendor_specific_insn to something like ->ud too.
> return EMULATION_FAILED;
>
> if (mode == X86EMUL_MODE_PROT64 && (ctxt->d & Stack))
> --
> 1.8.3
--
Gleb.
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