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kvm, emulator: Rename VendorSpecific flag 

Call it EmulateOnUD which is exactly what we're trying to do with
vendor-specific instructions.

Rename ->only_vendor_specific_insn to something shorter, while at it.

Signed-off-by: Borislav Petkov <bp@suse.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Borislav Petkov 2013-09-22 16:44:52 +02:00 committed by Paolo Bonzini
parent 1ce19dc16c
commit b51e974fcd
3 changed files with 9 additions and 10 deletions
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2
arch/x86/include/asm/kvm_emulate.h
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@ -274,7 +274,7 @@ struct x86_emulate_ctxt {
bool guest_mode; /* guest running a nested guest */ bool guest_mode; /* guest running a nested guest */
bool perm_ok; /* do not check permissions if true */ bool perm_ok; /* do not check permissions if true */
bool only_vendor_specific_insn; bool ud; /* inject an #UD if host doesn't support insn */
bool have_exception; bool have_exception;
struct x86_exception exception; struct x86_exception exception;

14
arch/x86/kvm/emulate.c
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@ -130,7 +130,7 @@
#define Mov (1<<20) #define Mov (1<<20)
/* Misc flags */ /* Misc flags */
#define Prot (1<<21) /* instruction generates #UD if not in prot-mode */ #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 NoAccess (1<<23) /* Don't access memory (lea/invlpg/verr etc) */
#define Op3264 (1<<24) /* Operand is 64b in long mode, 32b otherwise */ #define Op3264 (1<<24) /* Operand is 64b in long mode, 32b otherwise */
#define Undefined (1<<25) /* No Such Instruction */ #define Undefined (1<<25) /* No Such Instruction */
@ -3502,7 +3502,7 @@ static const struct opcode group7_rm1[] = {
static const struct opcode group7_rm3[] = { static const struct opcode group7_rm3[] = {
DIP(SrcNone | Prot | Priv, vmrun, check_svme_pa), 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, vmload, check_svme_pa),
DIP(SrcNone | Prot | Priv, vmsave, check_svme_pa), DIP(SrcNone | Prot | Priv, vmsave, check_svme_pa),
DIP(SrcNone | Prot | Priv, stgi, check_svme), DIP(SrcNone | Prot | Priv, stgi, check_svme),
@ -3587,7 +3587,7 @@ static const struct group_dual group7 = { {
II(SrcMem16 | Mov | Priv, em_lmsw, lmsw), II(SrcMem16 | Mov | Priv, em_lmsw, lmsw),
II(SrcMem | ByteOp | Priv | NoAccess, em_invlpg, invlpg), II(SrcMem | ByteOp | Priv | NoAccess, em_invlpg, invlpg),
}, { }, {
I(SrcNone | Priv | VendorSpecific, em_vmcall), I(SrcNone | Priv | EmulateOnUD, em_vmcall),
EXT(0, group7_rm1), EXT(0, group7_rm1),
N, EXT(0, group7_rm3), N, EXT(0, group7_rm3),
II(SrcNone | DstMem | Mov, em_smsw, smsw), N, II(SrcNone | DstMem | Mov, em_smsw, smsw), N,
@ -3810,7 +3810,7 @@ static const struct opcode opcode_table[256] = {
static const struct opcode twobyte_table[256] = { static const struct opcode twobyte_table[256] = {
/* 0x00 - 0x0F */ /* 0x00 - 0x0F */
G(0, group6), GD(0, &group7), N, N, 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, II(ImplicitOps | Priv, em_clts, clts), N,
DI(ImplicitOps | Priv, invd), DI(ImplicitOps | Priv, wbinvd), N, N, DI(ImplicitOps | Priv, invd), DI(ImplicitOps | Priv, wbinvd), N, N,
N, D(ImplicitOps | ModRM), N, N, N, D(ImplicitOps | ModRM), N, N,
@ -3830,8 +3830,8 @@ static const struct opcode twobyte_table[256] = {
IIP(ImplicitOps, em_rdtsc, rdtsc, check_rdtsc), IIP(ImplicitOps, em_rdtsc, rdtsc, check_rdtsc),
II(ImplicitOps | Priv, em_rdmsr, rdmsr), II(ImplicitOps | Priv, em_rdmsr, rdmsr),
IIP(ImplicitOps, em_rdpmc, rdpmc, check_rdpmc), IIP(ImplicitOps, em_rdpmc, rdpmc, check_rdpmc),
I(ImplicitOps | VendorSpecific, em_sysenter), I(ImplicitOps | EmulateOnUD, em_sysenter),
I(ImplicitOps | Priv | VendorSpecific, em_sysexit), I(ImplicitOps | Priv | EmulateOnUD, em_sysexit),
N, N, N, N,
N, N, N, N, N, N, N, N, N, N, N, N, N, N, N, N,
/* 0x40 - 0x4F */ /* 0x40 - 0x4F */
@ -4268,7 +4268,7 @@ done_prefixes:
if (ctxt->d == 0 || (ctxt->d & NotImpl)) if (ctxt->d == 0 || (ctxt->d & NotImpl))
return EMULATION_FAILED; return EMULATION_FAILED;
if (!(ctxt->d & VendorSpecific) && ctxt->only_vendor_specific_insn) if (!(ctxt->d & EmulateOnUD) && ctxt->ud)
return EMULATION_FAILED; return EMULATION_FAILED;
if (mode == X86EMUL_MODE_PROT64 && (ctxt->d & Stack)) if (mode == X86EMUL_MODE_PROT64 && (ctxt->d & Stack))

3
arch/x86/kvm/x86.c
View File

@ -5108,8 +5108,7 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu,
ctxt->have_exception = false; ctxt->have_exception = false;
ctxt->perm_ok = false; ctxt->perm_ok = false;
ctxt->only_vendor_specific_insn ctxt->ud = emulation_type & EMULTYPE_TRAP_UD;
= emulation_type & EMULTYPE_TRAP_UD;
r = x86_decode_insn(ctxt, insn, insn_len); r = x86_decode_insn(ctxt, insn, insn_len);