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-rw-r--r--drivers/kvm/x86_emulate.c342
1 files changed, 168 insertions, 174 deletions
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index 499d1ad42bc..3e3eba70d5a 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -1294,6 +1294,8 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
}
c->dst.orig_val = c->dst.val;
+special_insn:
+
if (c->twobyte)
goto twobyte_insn;
@@ -1378,6 +1380,52 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
goto cannot_emulate;
c->dst.val = (s32) c->src.val;
break;
+ case 0x6a: /* push imm8 */
+ c->src.val = 0L;
+ c->src.val = insn_fetch(s8, 1, c->eip);
+ emulate_push(ctxt);
+ break;
+ case 0x6c: /* insb */
+ case 0x6d: /* insw/insd */
+ if (kvm_emulate_pio_string(ctxt->vcpu, NULL,
+ 1,
+ (c->d & ByteOp) ? 1 : c->op_bytes,
+ c->rep_prefix ?
+ address_mask(c->regs[VCPU_REGS_RCX]) : 1,
+ (ctxt->eflags & EFLG_DF),
+ register_address(ctxt->es_base,
+ c->regs[VCPU_REGS_RDI]),
+ c->rep_prefix,
+ c->regs[VCPU_REGS_RDX]) == 0) {
+ c->eip = saved_eip;
+ return -1;
+ }
+ return 0;
+ case 0x6e: /* outsb */
+ case 0x6f: /* outsw/outsd */
+ if (kvm_emulate_pio_string(ctxt->vcpu, NULL,
+ 0,
+ (c->d & ByteOp) ? 1 : c->op_bytes,
+ c->rep_prefix ?
+ address_mask(c->regs[VCPU_REGS_RCX]) : 1,
+ (ctxt->eflags & EFLG_DF),
+ register_address(c->override_base ?
+ *c->override_base :
+ ctxt->ds_base,
+ c->regs[VCPU_REGS_RSI]),
+ c->rep_prefix,
+ c->regs[VCPU_REGS_RDX]) == 0) {
+ c->eip = saved_eip;
+ return -1;
+ }
+ return 0;
+ case 0x70 ... 0x7f: /* jcc (short) */ {
+ int rel = insn_fetch(s8, 1, c->eip);
+
+ if (test_cc(c->b, ctxt->eflags))
+ JMP_REL(rel);
+ break;
+ }
case 0x80 ... 0x83: /* Grp1 */
switch (c->modrm_reg) {
case 0:
@@ -1434,106 +1482,6 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
if (rc != 0)
goto done;
break;
- case 0xa0 ... 0xa1: /* mov */
- c->dst.ptr = (unsigned long *)&c->regs[VCPU_REGS_RAX];
- c->dst.val = c->src.val;
- break;
- case 0xa2 ... 0xa3: /* mov */
- c->dst.val = (unsigned long)c->regs[VCPU_REGS_RAX];
- break;
- case 0xc0 ... 0xc1:
- emulate_grp2(ctxt);
- break;
- case 0xc6 ... 0xc7: /* mov (sole member of Grp11) */
- mov:
- c->dst.val = c->src.val;
- break;
- case 0xd0 ... 0xd1: /* Grp2 */
- c->src.val = 1;
- emulate_grp2(ctxt);
- break;
- case 0xd2 ... 0xd3: /* Grp2 */
- c->src.val = c->regs[VCPU_REGS_RCX];
- emulate_grp2(ctxt);
- break;
- case 0xf6 ... 0xf7: /* Grp3 */
- rc = emulate_grp3(ctxt, ops);
- if (rc != 0)
- goto done;
- break;
- case 0xfe ... 0xff: /* Grp4/Grp5 */
- rc = emulate_grp45(ctxt, ops);
- if (rc != 0)
- goto done;
- break;
- }
-
-writeback:
- rc = writeback(ctxt, ops);
- if (rc != 0)
- goto done;
-
- /* Commit shadow register state. */
- memcpy(ctxt->vcpu->regs, c->regs, sizeof c->regs);
- ctxt->vcpu->rip = c->eip;
-
-done:
- if (rc == X86EMUL_UNHANDLEABLE) {
- c->eip = saved_eip;
- return -1;
- }
- return 0;
-
-special_insn:
- if (c->twobyte)
- goto twobyte_special_insn;
- switch (c->b) {
- case 0x6a: /* push imm8 */
- c->src.val = 0L;
- c->src.val = insn_fetch(s8, 1, c->eip);
- emulate_push(ctxt);
- break;
- case 0x6c: /* insb */
- case 0x6d: /* insw/insd */
- if (kvm_emulate_pio_string(ctxt->vcpu, NULL,
- 1,
- (c->d & ByteOp) ? 1 : c->op_bytes,
- c->rep_prefix ?
- address_mask(c->regs[VCPU_REGS_RCX]) : 1,
- (ctxt->eflags & EFLG_DF),
- register_address(ctxt->es_base,
- c->regs[VCPU_REGS_RDI]),
- c->rep_prefix,
- c->regs[VCPU_REGS_RDX]) == 0) {
- c->eip = saved_eip;
- return -1;
- }
- return 0;
- case 0x6e: /* outsb */
- case 0x6f: /* outsw/outsd */
- if (kvm_emulate_pio_string(ctxt->vcpu, NULL,
- 0,
- (c->d & ByteOp) ? 1 : c->op_bytes,
- c->rep_prefix ?
- address_mask(c->regs[VCPU_REGS_RCX]) : 1,
- (ctxt->eflags & EFLG_DF),
- register_address(c->override_base ?
- *c->override_base :
- ctxt->ds_base,
- c->regs[VCPU_REGS_RSI]),
- c->rep_prefix,
- c->regs[VCPU_REGS_RDX]) == 0) {
- c->eip = saved_eip;
- return -1;
- }
- return 0;
- case 0x70 ... 0x7f: /* jcc (short) */ {
- int rel = insn_fetch(s8, 1, c->eip);
-
- if (test_cc(c->b, ctxt->eflags))
- JMP_REL(rel);
- break;
- }
case 0x9c: /* pushf */
c->src.val = (unsigned long) ctxt->eflags;
emulate_push(ctxt);
@@ -1541,6 +1489,13 @@ special_insn:
case 0x9d: /* popf */
c->dst.ptr = (unsigned long *) &ctxt->eflags;
goto pop_instruction;
+ case 0xa0 ... 0xa1: /* mov */
+ c->dst.ptr = (unsigned long *)&c->regs[VCPU_REGS_RAX];
+ c->dst.val = c->src.val;
+ break;
+ case 0xa2 ... 0xa3: /* mov */
+ c->dst.val = (unsigned long)c->regs[VCPU_REGS_RAX];
+ break;
case 0xa4 ... 0xa5: /* movs */
c->dst.type = OP_MEM;
c->dst.bytes = (c->d & ByteOp) ? 1 : c->op_bytes;
@@ -1627,9 +1582,24 @@ special_insn:
case 0xae ... 0xaf: /* scas */
DPRINTF("Urk! I don't handle SCAS.\n");
goto cannot_emulate;
+ case 0xc0 ... 0xc1:
+ emulate_grp2(ctxt);
+ break;
case 0xc3: /* ret */
c->dst.ptr = &c->eip;
goto pop_instruction;
+ case 0xc6 ... 0xc7: /* mov (sole member of Grp11) */
+ mov:
+ c->dst.val = c->src.val;
+ break;
+ case 0xd0 ... 0xd1: /* Grp2 */
+ c->src.val = 1;
+ emulate_grp2(ctxt);
+ break;
+ case 0xd2 ... 0xd3: /* Grp2 */
+ c->src.val = c->regs[VCPU_REGS_RCX];
+ emulate_grp2(ctxt);
+ break;
case 0xe8: /* call (near) */ {
long int rel;
switch (c->op_bytes) {
@@ -1662,6 +1632,11 @@ special_insn:
ctxt->eflags ^= EFLG_CF;
c->dst.type = OP_NONE; /* Disable writeback. */
break;
+ case 0xf6 ... 0xf7: /* Grp3 */
+ rc = emulate_grp3(ctxt, ops);
+ if (rc != 0)
+ goto done;
+ break;
case 0xf8: /* clc */
ctxt->eflags &= ~EFLG_CF;
c->dst.type = OP_NONE; /* Disable writeback. */
@@ -1674,8 +1649,28 @@ special_insn:
ctxt->eflags |= X86_EFLAGS_IF;
c->dst.type = OP_NONE; /* Disable writeback. */
break;
+ case 0xfe ... 0xff: /* Grp4/Grp5 */
+ rc = emulate_grp45(ctxt, ops);
+ if (rc != 0)
+ goto done;
+ break;
}
- goto writeback;
+
+writeback:
+ rc = writeback(ctxt, ops);
+ if (rc != 0)
+ goto done;
+
+ /* Commit shadow register state. */
+ memcpy(ctxt->vcpu->regs, c->regs, sizeof c->regs);
+ ctxt->vcpu->rip = c->eip;
+
+done:
+ if (rc == X86EMUL_UNHANDLEABLE) {
+ c->eip = saved_eip;
+ return -1;
+ }
+ return 0;
twobyte_insn:
switch (c->b) {
@@ -1737,6 +1732,23 @@ twobyte_insn:
/* Disable writeback. */
c->dst.type = OP_NONE;
break;
+ case 0x06:
+ emulate_clts(ctxt->vcpu);
+ c->dst.type = OP_NONE;
+ break;
+ case 0x08: /* invd */
+ case 0x09: /* wbinvd */
+ case 0x0d: /* GrpP (prefetch) */
+ case 0x18: /* Grp16 (prefetch/nop) */
+ c->dst.type = OP_NONE;
+ break;
+ case 0x20: /* mov cr, reg */
+ if (c->modrm_mod != 3)
+ goto cannot_emulate;
+ c->regs[c->modrm_rm] =
+ realmode_get_cr(ctxt->vcpu, c->modrm_reg);
+ c->dst.type = OP_NONE; /* no writeback */
+ break;
case 0x21: /* mov from dr to reg */
if (c->modrm_mod != 3)
goto cannot_emulate;
@@ -1745,6 +1757,13 @@ twobyte_insn:
goto cannot_emulate;
c->dst.type = OP_NONE; /* no writeback */
break;
+ case 0x22: /* mov reg, cr */
+ if (c->modrm_mod != 3)
+ goto cannot_emulate;
+ realmode_set_cr(ctxt->vcpu,
+ c->modrm_reg, c->modrm_val, &ctxt->eflags);
+ c->dst.type = OP_NONE;
+ break;
case 0x23: /* mov from reg to dr */
if (c->modrm_mod != 3)
goto cannot_emulate;
@@ -1754,11 +1773,58 @@ twobyte_insn:
goto cannot_emulate;
c->dst.type = OP_NONE; /* no writeback */
break;
+ case 0x30:
+ /* wrmsr */
+ msr_data = (u32)c->regs[VCPU_REGS_RAX]
+ | ((u64)c->regs[VCPU_REGS_RDX] << 32);
+ rc = kvm_set_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], msr_data);
+ if (rc) {
+ kvm_x86_ops->inject_gp(ctxt->vcpu, 0);
+ c->eip = ctxt->vcpu->rip;
+ }
+ rc = X86EMUL_CONTINUE;
+ c->dst.type = OP_NONE;
+ break;
+ case 0x32:
+ /* rdmsr */
+ rc = kvm_get_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], &msr_data);
+ if (rc) {
+ kvm_x86_ops->inject_gp(ctxt->vcpu, 0);
+ c->eip = ctxt->vcpu->rip;
+ } else {
+ c->regs[VCPU_REGS_RAX] = (u32)msr_data;
+ c->regs[VCPU_REGS_RDX] = msr_data >> 32;
+ }
+ rc = X86EMUL_CONTINUE;
+ c->dst.type = OP_NONE;
+ break;
case 0x40 ... 0x4f: /* cmov */
c->dst.val = c->dst.orig_val = c->src.val;
if (!test_cc(c->b, ctxt->eflags))
c->dst.type = OP_NONE; /* no writeback */
break;
+ case 0x80 ... 0x8f: /* jnz rel, etc*/ {
+ long int rel;
+
+ switch (c->op_bytes) {
+ case 2:
+ rel = insn_fetch(s16, 2, c->eip);
+ break;
+ case 4:
+ rel = insn_fetch(s32, 4, c->eip);
+ break;
+ case 8:
+ rel = insn_fetch(s64, 8, c->eip);
+ break;
+ default:
+ DPRINTF("jnz: Invalid op_bytes\n");
+ goto cannot_emulate;
+ }
+ if (test_cc(c->b, ctxt->eflags))
+ JMP_REL(rel);
+ c->dst.type = OP_NONE;
+ break;
+ }
case 0xa3:
bt: /* bt */
c->dst.type = OP_NONE;
@@ -1828,85 +1894,13 @@ twobyte_insn:
c->dst.val = (c->op_bytes == 4) ? (u32) c->src.val :
(u64) c->src.val;
break;
- }
- goto writeback;
-
-twobyte_special_insn:
- switch (c->b) {
- case 0x06:
- emulate_clts(ctxt->vcpu);
- break;
- case 0x08: /* invd */
- break;
- case 0x09: /* wbinvd */
- break;
- case 0x0d: /* GrpP (prefetch) */
- case 0x18: /* Grp16 (prefetch/nop) */
- break;
- case 0x20: /* mov cr, reg */
- if (c->modrm_mod != 3)
- goto cannot_emulate;
- c->regs[c->modrm_rm] =
- realmode_get_cr(ctxt->vcpu, c->modrm_reg);
- break;
- case 0x22: /* mov reg, cr */
- if (c->modrm_mod != 3)
- goto cannot_emulate;
- realmode_set_cr(ctxt->vcpu,
- c->modrm_reg, c->modrm_val, &ctxt->eflags);
- break;
- case 0x30:
- /* wrmsr */
- msr_data = (u32)c->regs[VCPU_REGS_RAX]
- | ((u64)c->regs[VCPU_REGS_RDX] << 32);
- rc = kvm_set_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], msr_data);
- if (rc) {
- kvm_x86_ops->inject_gp(ctxt->vcpu, 0);
- c->eip = ctxt->vcpu->rip;
- }
- rc = X86EMUL_CONTINUE;
- break;
- case 0x32:
- /* rdmsr */
- rc = kvm_get_msr(ctxt->vcpu, c->regs[VCPU_REGS_RCX], &msr_data);
- if (rc) {
- kvm_x86_ops->inject_gp(ctxt->vcpu, 0);
- c->eip = ctxt->vcpu->rip;
- } else {
- c->regs[VCPU_REGS_RAX] = (u32)msr_data;
- c->regs[VCPU_REGS_RDX] = msr_data >> 32;
- }
- rc = X86EMUL_CONTINUE;
- break;
- case 0x80 ... 0x8f: /* jnz rel, etc*/ {
- long int rel;
-
- switch (c->op_bytes) {
- case 2:
- rel = insn_fetch(s16, 2, c->eip);
- break;
- case 4:
- rel = insn_fetch(s32, 4, c->eip);
- break;
- case 8:
- rel = insn_fetch(s64, 8, c->eip);
- break;
- default:
- DPRINTF("jnz: Invalid op_bytes\n");
- goto cannot_emulate;
- }
- if (test_cc(c->b, ctxt->eflags))
- JMP_REL(rel);
- break;
- }
case 0xc7: /* Grp9 (cmpxchg8b) */
rc = emulate_grp9(ctxt, ops, memop);
if (rc != 0)
goto done;
+ c->dst.type = OP_NONE;
break;
}
- /* Disable writeback. */
- c->dst.type = OP_NONE;
goto writeback;
cannot_emulate:
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-20 05:31:31 +0000