diff options
-rw-r--r-- | arch/x86/include/asm/kvm_emulate.h | 1 | ||||
-rw-r--r-- | arch/x86/kvm/emulate.c | 14 |
2 files changed, 15 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_emulate.h b/arch/x86/include/asm/kvm_emulate.h index 1dbd0c736cd..460c2d8964b 100644 --- a/arch/x86/include/asm/kvm_emulate.h +++ b/arch/x86/include/asm/kvm_emulate.h | |||
@@ -222,6 +222,7 @@ struct decode_cache { | |||
222 | u8 seg_override; | 222 | u8 seg_override; |
223 | unsigned int d; | 223 | unsigned int d; |
224 | int (*execute)(struct x86_emulate_ctxt *ctxt); | 224 | int (*execute)(struct x86_emulate_ctxt *ctxt); |
225 | int (*check_perm)(struct x86_emulate_ctxt *ctxt); | ||
225 | unsigned long regs[NR_VCPU_REGS]; | 226 | unsigned long regs[NR_VCPU_REGS]; |
226 | unsigned long eip; | 227 | unsigned long eip; |
227 | /* modrm */ | 228 | /* modrm */ |
diff --git a/arch/x86/kvm/emulate.c b/arch/x86/kvm/emulate.c index a2c31e527a9..4822824b608 100644 --- a/arch/x86/kvm/emulate.c +++ b/arch/x86/kvm/emulate.c | |||
@@ -111,6 +111,7 @@ struct opcode { | |||
111 | struct group_dual *gdual; | 111 | struct group_dual *gdual; |
112 | struct gprefix *gprefix; | 112 | struct gprefix *gprefix; |
113 | } u; | 113 | } u; |
114 | int (*check_perm)(struct x86_emulate_ctxt *ctxt); | ||
114 | }; | 115 | }; |
115 | 116 | ||
116 | struct group_dual { | 117 | struct group_dual { |
@@ -2425,12 +2426,17 @@ static int em_movdqu(struct x86_emulate_ctxt *ctxt) | |||
2425 | 2426 | ||
2426 | #define D(_y) { .flags = (_y) } | 2427 | #define D(_y) { .flags = (_y) } |
2427 | #define DI(_y, _i) { .flags = (_y), .intercept = x86_intercept_##_i } | 2428 | #define DI(_y, _i) { .flags = (_y), .intercept = x86_intercept_##_i } |
2429 | #define DIP(_y, _i, _p) { .flags = (_y), .intercept = x86_intercept_##_i, \ | ||
2430 | .check_perm = (_p) } | ||
2428 | #define N D(0) | 2431 | #define N D(0) |
2429 | #define G(_f, _g) { .flags = ((_f) | Group), .u.group = (_g) } | 2432 | #define G(_f, _g) { .flags = ((_f) | Group), .u.group = (_g) } |
2430 | #define GD(_f, _g) { .flags = ((_f) | Group | GroupDual), .u.gdual = (_g) } | 2433 | #define GD(_f, _g) { .flags = ((_f) | Group | GroupDual), .u.gdual = (_g) } |
2431 | #define I(_f, _e) { .flags = (_f), .u.execute = (_e) } | 2434 | #define I(_f, _e) { .flags = (_f), .u.execute = (_e) } |
2432 | #define II(_f, _e, _i) \ | 2435 | #define II(_f, _e, _i) \ |
2433 | { .flags = (_f), .u.execute = (_e), .intercept = x86_intercept_##_i } | 2436 | { .flags = (_f), .u.execute = (_e), .intercept = x86_intercept_##_i } |
2437 | #define IIP(_f, _e, _i, _p) \ | ||
2438 | { .flags = (_f), .u.execute = (_e), .intercept = x86_intercept_##_i, \ | ||
2439 | .check_perm = (_p) } | ||
2434 | #define GP(_f, _g) { .flags = ((_f) | Prefix), .u.gprefix = (_g) } | 2440 | #define GP(_f, _g) { .flags = ((_f) | Prefix), .u.gprefix = (_g) } |
2435 | 2441 | ||
2436 | #define D2bv(_f) D((_f) | ByteOp), D(_f) | 2442 | #define D2bv(_f) D((_f) | ByteOp), D(_f) |
@@ -2873,6 +2879,7 @@ done_prefixes: | |||
2873 | } | 2879 | } |
2874 | 2880 | ||
2875 | c->execute = opcode.u.execute; | 2881 | c->execute = opcode.u.execute; |
2882 | c->check_perm = opcode.check_perm; | ||
2876 | c->intercept = opcode.intercept; | 2883 | c->intercept = opcode.intercept; |
2877 | 2884 | ||
2878 | /* Unrecognised? */ | 2885 | /* Unrecognised? */ |
@@ -3136,6 +3143,13 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt) | |||
3136 | goto done; | 3143 | goto done; |
3137 | } | 3144 | } |
3138 | 3145 | ||
3146 | /* Do instruction specific permission checks */ | ||
3147 | if (c->check_perm) { | ||
3148 | rc = c->check_perm(ctxt); | ||
3149 | if (rc != X86EMUL_CONTINUE) | ||
3150 | goto done; | ||
3151 | } | ||
3152 | |||
3139 | if (unlikely(ctxt->guest_mode) && c->intercept) { | 3153 | if (unlikely(ctxt->guest_mode) && c->intercept) { |
3140 | rc = ops->intercept(ctxt, c->intercept, | 3154 | rc = ops->intercept(ctxt, c->intercept, |
3141 | X86_ICPT_POST_EXCEPT); | 3155 | X86_ICPT_POST_EXCEPT); |