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>

3 files changed, 9 insertions, 10 deletions

diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h
index 92a176ad456c..24ec1216596e 100644
--- a/arch/x86/include/asm/kvm_emulate.h
+++ b/arch/x86/include/asm/kvm_emulate.h
@@ -274,7 +274,7 @@ struct x86_emulate_ctxt {
 
         bool guest_mode; /* guest running a nested guest */
         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;
         struct x86_exception exception;
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c
index d554d96afbca..541801527225 100644
--- a/arch/x86/kvm/emulate.c
+++ b/arch/x86/kvm/emulate.c
@@ -130,7 +130,7 @@
 #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 */
@@ -3502,7 +3502,7 @@ 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),
@@ -3587,7 +3587,7 @@ 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,
@@ -3810,7 +3810,7 @@ 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,
@@ -3830,8 +3830,8 @@ 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 */
@@ -4268,7 +4268,7 @@ 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->ud)
                 return EMULATION_FAILED;
 
         if (mode == X86EMUL_MODE_PROT64 && (ctxt->d & Stack))
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index d00d88455fef..15f9540a2b1f 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5108,8 +5108,7 @@ int x86_emulate_instruction(struct kvm_vcpu *vcpu,
                 ctxt->have_exception = false;
                 ctxt->perm_ok = false;
 
-                ctxt->only_vendor_specific_insn
-                        = emulation_type & EMULTYPE_TRAP_UD;
+                ctxt->ud = emulation_type & EMULTYPE_TRAP_UD;
 
                 r = x86_decode_insn(ctxt, insn, insn_len);