diff options
| author | Gleb Natapov <gleb@redhat.com> | 2013-04-11 11:59:55 +0300 |
|---|---|---|
| committer | Gleb Natapov <gleb@redhat.com> | 2013-04-14 09:44:16 +0300 |
| commit | 0b789eee2c0204da83278f181428560faf6efefb (patch) | |
| tree | 033042a99893a21f21425bc7c6af8f2686cf200c | |
| parent | f8da94e9e44b237fa5cc8521faeb714dc2e83b54 (diff) | |
KVM: emulator: fix unimplemented instruction detection
Unimplemented instruction detection is broken for group instructions
since it relies on "flags" field of opcode to be zero, but all
instructions in a group inherit flags from a group encoding. Fix that by
having a separate flag for unimplemented instructions.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
| -rw-r--r-- | arch/x86/kvm/emulate.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index 069d79926e2b..ab6fda4eb98f 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c @@ -132,8 +132,9 @@ #define Priv (1<<27) /* instruction generates #GP if current CPL != 0 */ #define No64 (1<<28) #define PageTable (1 << 29) /* instruction used to write page table */ +#define NotImpl (1 << 30) /* instruction is not implemented */ /* Source 2 operand type */ -#define Src2Shift (30) +#define Src2Shift (31) #define Src2None (OpNone << Src2Shift) #define Src2CL (OpCL << Src2Shift) #define Src2ImmByte (OpImmByte << Src2Shift) @@ -3624,7 +3625,7 @@ static int check_perm_out(struct x86_emulate_ctxt *ctxt) #define DI(_y, _i) { .flags = (_y), .intercept = x86_intercept_##_i } #define DIP(_y, _i, _p) { .flags = (_y), .intercept = x86_intercept_##_i, \ .check_perm = (_p) } -#define N D(0) +#define N D(NotImpl) #define EXT(_f, _e) { .flags = ((_f) | RMExt), .u.group = (_e) } #define G(_f, _g) { .flags = ((_f) | Group | ModRM), .u.group = (_g) } #define GD(_f, _g) { .flags = ((_f) | GroupDual | ModRM), .u.gdual = (_g) } @@ -4382,7 +4383,7 @@ done_prefixes: ctxt->intercept = opcode.intercept; /* Unrecognised? */ - if (ctxt->d == 0 || (ctxt->d & Undefined)) + if (ctxt->d == 0 || (ctxt->d & NotImpl) || (ctxt->d & Undefined)) return EMULATION_FAILED; if (!(ctxt->d & VendorSpecific) && ctxt->only_vendor_specific_insn) |