diff options
| author | Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net> | 2008-05-27 16:49:15 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-07-20 13:42:28 +0400 |
| commit | 4257198ae2c36e030a0947fef661c8de973778be (patch) | |
| tree | a1091af43a2d3e39b7f8597369ba5b7a68b7fd83 /arch/x86 | |
| parent | 615ac125618dc7b40ecb418e8b353d31ccf0e518 (diff) | |
| download | linux-4257198ae2c36e030a0947fef661c8de973778be.tar.xz | |
KVM: x86 emulator: Add support for mov seg, r (0x8e) instruction
Add support for mov r, sreg (0x8c) instruction.
[avi: drop the sreg decoding table in favor of 1:1 encoding]
Signed-off-by: Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net>
Signed-off-by: Laurent Vivier <laurent.vivier@bull.net>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/x86_emulate.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c index 21d7ff6a8ecd..b049b6bf9a71 100644 --- a/arch/x86/kvm/x86_emulate.c +++ b/arch/x86/kvm/x86_emulate.c @@ -138,7 +138,8 @@ static u16 opcode_table[256] = { /* 0x88 - 0x8F */ ByteOp | DstMem | SrcReg | ModRM | Mov, DstMem | SrcReg | ModRM | Mov, ByteOp | DstReg | SrcMem | ModRM | Mov, DstReg | SrcMem | ModRM | Mov, - 0, ModRM | DstReg, 0, Group | Group1A, + 0, ModRM | DstReg, + DstReg | SrcMem | ModRM | Mov, Group | Group1A, /* 0x90 - 0x9F */ 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, ImplicitOps | Stack, ImplicitOps | Stack, 0, 0, @@ -1520,6 +1521,28 @@ special_insn: case 0x8d: /* lea r16/r32, m */ c->dst.val = c->modrm_ea; break; + case 0x8e: { /* mov seg, r/m16 */ + uint16_t sel; + int type_bits; + int err; + + sel = c->src.val; + if (c->modrm_reg <= 5) { + type_bits = (c->modrm_reg == 1) ? 9 : 1; + err = kvm_load_segment_descriptor(ctxt->vcpu, sel, + type_bits, c->modrm_reg); + } else { + printk(KERN_INFO "Invalid segreg in modrm byte 0x%02x\n", + c->modrm); + goto cannot_emulate; + } + + if (err < 0) + goto cannot_emulate; + + c->dst.type = OP_NONE; /* Disable writeback. */ + break; + } case 0x8f: /* pop (sole member of Grp1a) */ rc = emulate_grp1a(ctxt, ops); if (rc != 0) |