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| author | Mohammed Gamal <m.gamal005@gmail.com> | 2008-09-06 18:22:29 +0400 |
|---|---|---|
| committer | Avi Kivity <avi@qumranet.com> | 2008-10-15 12:15:25 +0400 |
| commit | a6a3034cb979b1fa3948d8e1e91b2387fc66b89b (patch) | |
| tree | 4f7c5f7d86a8bc135dd852c7927de7417ccd1375 /arch/x86/kvm | |
| parent | fa89a81766e33343fa8f0fe0e371819bf94a17a1 (diff) | |
| download | linux-a6a3034cb979b1fa3948d8e1e91b2387fc66b89b.tar.xz | |
KVM: x86 emulator: Add in/out instructions (opcodes 0xe4-0xe7, 0xec-0xef)
The patch adds in/out instructions to the x86 emulator.
The instruction was encountered while running the BIOS while using
the invalid guest state emulation patch.
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
Diffstat (limited to 'arch/x86/kvm')
| -rw-r--r-- | arch/x86/kvm/x86_emulate.c | 35 |
1 files changed, 33 insertions, 2 deletions
diff --git a/arch/x86/kvm/x86_emulate.c b/arch/x86/kvm/x86_emulate.c index 944f1f4d4be4..3ac2f1485223 100644 --- a/arch/x86/kvm/x86_emulate.c +++ b/arch/x86/kvm/x86_emulate.c @@ -177,11 +177,14 @@ static u16 opcode_table[256] = { /* 0xD8 - 0xDF */ 0, 0, 0, 0, 0, 0, 0, 0, /* 0xE0 - 0xE7 */ - 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, + SrcNone | ByteOp | ImplicitOps, SrcNone | ImplicitOps, + SrcNone | ByteOp | ImplicitOps, SrcNone | ImplicitOps, /* 0xE8 - 0xEF */ ImplicitOps | Stack, SrcImm | ImplicitOps, ImplicitOps, SrcImmByte | ImplicitOps, - 0, 0, 0, 0, + SrcNone | ByteOp | ImplicitOps, SrcNone | ImplicitOps, + SrcNone | ByteOp | ImplicitOps, SrcNone | ImplicitOps, /* 0xF0 - 0xF7 */ 0, 0, 0, 0, ImplicitOps, ImplicitOps, Group | Group3_Byte, Group | Group3, @@ -1259,6 +1262,8 @@ x86_emulate_insn(struct x86_emulate_ctxt *ctxt, struct x86_emulate_ops *ops) u64 msr_data; unsigned long saved_eip = 0; struct decode_cache *c = &ctxt->decode; + unsigned int port; + int io_dir_in; int rc = 0; /* Shadow copy of register state. Committed on successful emulation. @@ -1687,6 +1692,16 @@ special_insn: c->src.val = c->regs[VCPU_REGS_RCX]; emulate_grp2(ctxt); break; + case 0xe4: /* inb */ + case 0xe5: /* in */ + port = insn_fetch(u8, 1, c->eip); + io_dir_in = 1; + goto do_io; + case 0xe6: /* outb */ + case 0xe7: /* out */ + port = insn_fetch(u8, 1, c->eip); + io_dir_in = 0; + goto do_io; case 0xe8: /* call (near) */ { long int rel; switch (c->op_bytes) { @@ -1737,6 +1752,22 @@ special_insn: jmp_rel(c, c->src.val); c->dst.type = OP_NONE; /* Disable writeback. */ break; + case 0xec: /* in al,dx */ + case 0xed: /* in (e/r)ax,dx */ + port = c->regs[VCPU_REGS_RDX]; + io_dir_in = 1; + goto do_io; + case 0xee: /* out al,dx */ + case 0xef: /* out (e/r)ax,dx */ + port = c->regs[VCPU_REGS_RDX]; + io_dir_in = 0; + do_io: if (kvm_emulate_pio(ctxt->vcpu, NULL, io_dir_in, + (c->d & ByteOp) ? 1 : c->op_bytes, + port) != 0) { + c->eip = saved_eip; + goto cannot_emulate; + } + return 0; case 0xf4: /* hlt */ ctxt->vcpu->arch.halt_request = 1; break; |