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path: root/drivers/kvm/x86_emulate.c
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Diffstat (limited to 'drivers/kvm/x86_emulate.c')
-rw-r--r--drivers/kvm/x86_emulate.c44
1 files changed, 34 insertions, 10 deletions
diff --git a/drivers/kvm/x86_emulate.c b/drivers/kvm/x86_emulate.c
index 7ade090..f60012d 100644
--- a/drivers/kvm/x86_emulate.c
+++ b/drivers/kvm/x86_emulate.c
@@ -98,8 +98,11 @@ static u8 opcode_table[256] = {
0, 0, 0, 0,
/* 0x40 - 0x4F */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
- /* 0x50 - 0x5F */
- 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0x50 - 0x57 */
+ 0, 0, 0, 0, 0, 0, 0, 0,
+ /* 0x58 - 0x5F */
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
+ ImplicitOps, ImplicitOps, ImplicitOps, ImplicitOps,
/* 0x60 - 0x6F */
0, 0, 0, DstReg | SrcMem32 | ModRM | Mov /* movsxd (x86/64) */ ,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
@@ -128,9 +131,9 @@ static u8 opcode_table[256] = {
/* 0xB0 - 0xBF */
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xC0 - 0xC7 */
- ByteOp | DstMem | SrcImm | ModRM, DstMem | SrcImmByte | ModRM, 0, 0,
- 0, 0, ByteOp | DstMem | SrcImm | ModRM | Mov,
- DstMem | SrcImm | ModRM | Mov,
+ ByteOp | DstMem | SrcImm | ModRM, DstMem | SrcImmByte | ModRM,
+ 0, ImplicitOps, 0, 0,
+ ByteOp | DstMem | SrcImm | ModRM | Mov, DstMem | SrcImm | ModRM | Mov,
/* 0xC8 - 0xCF */
0, 0, 0, 0, 0, 0, 0, 0,
/* 0xD0 - 0xD7 */
@@ -143,7 +146,8 @@ static u8 opcode_table[256] = {
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
/* 0xF0 - 0xF7 */
0, 0, 0, 0,
- 0, 0, ByteOp | DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM,
+ ImplicitOps, 0,
+ ByteOp | DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM,
/* 0xF8 - 0xFF */
0, 0, 0, 0,
0, 0, ByteOp | DstMem | SrcNone | ModRM, DstMem | SrcNone | ModRM
@@ -152,7 +156,7 @@ static u8 opcode_table[256] = {
static u16 twobyte_table[256] = {
/* 0x00 - 0x0F */
0, SrcMem | ModRM | DstReg, 0, 0, 0, 0, ImplicitOps, 0,
- 0, 0, 0, 0, 0, ImplicitOps | ModRM, 0, 0,
+ 0, ImplicitOps, 0, 0, 0, ImplicitOps | ModRM, 0, 0,
/* 0x10 - 0x1F */
0, 0, 0, 0, 0, 0, 0, 0, ImplicitOps | ModRM, 0, 0, 0, 0, 0, 0, 0,
/* 0x20 - 0x2F */
@@ -481,6 +485,7 @@ x86_emulate_memop(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops)
int mode = ctxt->mode;
unsigned long modrm_ea;
int use_modrm_ea, index_reg = 0, base_reg = 0, scale, rip_relative = 0;
+ int no_wb = 0;
/* Shadow copy of register state. Committed on successful emulation. */
unsigned long _regs[NR_VCPU_REGS];
@@ -1047,7 +1052,7 @@ done_prefixes:
_regs[VCPU_REGS_RSP]),
&dst.val, dst.bytes, ctxt)) != 0)
goto done;
- dst.val = dst.orig_val; /* skanky: disable writeback */
+ no_wb = 1;
break;
default:
goto cannot_emulate;
@@ -1056,7 +1061,7 @@ done_prefixes:
}
writeback:
- if ((d & Mov) || (dst.orig_val != dst.val)) {
+ if (!no_wb) {
switch (dst.type) {
case OP_REG:
/* The 4-byte case *is* correct: in 64-bit mode we zero-extend. */
@@ -1149,6 +1154,23 @@ special_insn:
case 0xae ... 0xaf: /* scas */
DPRINTF("Urk! I don't handle SCAS.\n");
goto cannot_emulate;
+ case 0xf4: /* hlt */
+ ctxt->vcpu->halt_request = 1;
+ goto done;
+ case 0xc3: /* ret */
+ dst.ptr = &_eip;
+ goto pop_instruction;
+ case 0x58 ... 0x5f: /* pop reg */
+ dst.ptr = (unsigned long *)&_regs[b & 0x7];
+
+pop_instruction:
+ if ((rc = ops->read_std(register_address(ctxt->ss_base,
+ _regs[VCPU_REGS_RSP]), dst.ptr, op_bytes, ctxt)) != 0)
+ goto done;
+
+ register_address_increment(_regs[VCPU_REGS_RSP], op_bytes);
+ no_wb = 1; /* Disable writeback. */
+ break;
}
goto writeback;
@@ -1302,8 +1324,10 @@ twobyte_insn:
twobyte_special_insn:
/* Disable writeback. */
- dst.orig_val = dst.val;
+ no_wb = 1;
switch (b) {
+ case 0x09: /* wbinvd */
+ break;
case 0x0d: /* GrpP (prefetch) */
case 0x18: /* Grp16 (prefetch/nop) */
break;