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d47f00a62b
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217 Commits

Author SHA1 Message Date
Joerg Roedel
d47f00a62b KVM: X86: Propagate fetch faults 
KVM currently ignores fetch faults in the instruction
emulator. With nested-npt we could have such faults. This
patch adds the code to handle these.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:52:41 +02:00
Joerg Roedel
8df25a328a KVM: MMU: Track page fault data in struct vcpu 
This patch introduces a struct with two new fields in
vcpu_arch for x86:

	* fault.address
	* fault.error_code

This will be used to correctly propagate page faults back
into the guest when we could have either an ordinary page
fault or a nested page fault. In the case of a nested page
fault the fault-address is different from the original
address that should be walked. So we need to keep track
about the real fault-address.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:52:33 +02:00
Avi Kivity
7d9ddaedd8 KVM: x86 emulator: clean up control flow in x86_emulate_insn() 
x86_emulate_insn() is full of things like

    if (rc != X86EMUL_CONTINUE)
        goto done;
    break;

consolidate all of those at the end of the switch statement.

Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:54 +02:00
Avi Kivity
a4d4a7c188 KVM: x86 emulator: fix group 11 decoding for reg != 0 
These are all undefined.

Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:53 +02:00
Avi Kivity
b9eac5f4d1 KVM: x86 emulator: use single stage decoding for mov instructions 
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:52 +02:00
Avi Kivity
6230f7fc04 KVM: x86 emulator: simplify ALU opcode block decode further 
The ALU opcode block is very regular; introduce D6ALU() to define decode
flags for 6 instructions at a time.

Suggested by Paolo Bonzini.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:43 +02:00
Avi Kivity
34d1f4905e KVM: x86 emulator: trap and propagate #DE from DIV and IDIV 
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:42 +02:00
Avi Kivity
f6b3597bde KVM: x86 emulator: add macros for executing instructions that may trap 
Like DIV and IDIV.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:41 +02:00
Avi Kivity
739ae40606 KVM: x86 emulator: simplify instruction decode flags for opcodes 0F 00-FF 
Use the new byte/word dual opcode decode.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:41 +02:00
Avi Kivity
d269e3961a KVM: x86 emulator: simplify instruction decode flags for opcodes E0-FF 
Use the new byte/word dual opcode decode.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:40 +02:00
Avi Kivity
d2c6c7adb1 KVM: x86 emulator: simplify instruction decode flags for opcodes C0-DF 
Use the new byte/word dual opcode decode.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:39 +02:00
Avi Kivity
50748613d1 KVM: x86 emulator: simplify instruction decode flags for opcodes A0-AF 
Use the new byte/word dual opcode decode.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:38 +02:00
Avi Kivity
76e8e68d44 KVM: x86 emulator: simplify instruction decode flags for opcodes 80-8F 
Use the new byte/word dual opcode decode.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:38 +02:00
Avi Kivity
48fe67b5f7 KVM: x86 emulator: simplify string instruction decode flags 
Use the new byte/word dual opcode decode.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:37 +02:00
Avi Kivity
5315fbb223 KVM: x86 emulator: simplify ALU block (opcodes 00-3F) decode flags 
Use the new byte/word dual opcode decode.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:36 +02:00
Avi Kivity
8d8f4e9f66 KVM: x86 emulator: support byte/word opcode pairs 
Many x86 instructions come in byte and word variants distinguished with bit
0 of the opcode.  Add macros to aid in defining them.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:35 +02:00
Avi Kivity
081bca0e6b KVM: x86 emulator: refuse SrcMemFAddr (e.g. LDS) with register operand 
SrcMemFAddr is not defined with the modrm operand designating a register
instead of a memory address.

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:35 +02:00
Gleb Natapov
d2ddd1c483 KVM: x86 emulator: get rid of "restart" in emulation context. 
x86_emulate_insn() will return 1 if instruction can be restarted
without re-entering a guest.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:34 +02:00
Gleb Natapov
3e2f65d57a KVM: x86 emulator: move string instruction completion check into separate function 
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:33 +02:00
Gleb Natapov
6e2fb2cadd KVM: x86 emulator: Rename variable that shadows another local variable. 
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:32 +02:00
Wei Yongjun
cc4feed57f KVM: x86 emulator: add CALL FAR instruction emulation (opcode 9a) 
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:31 +02:00
Wei Yongjun
e4abac67b7 KVM: x86 emulator: add JrCXZ instruction emulation 
Add JrCXZ instruction emulation (opcode 0xe3)
Used by FreeBSD boot loader.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:20 +02:00
Wei Yongjun
09b5f4d3c4 KVM: x86 emulator: add LDS/LES/LFS/LGS/LSS instruction emulation 
Add LDS/LES/LFS/LGS/LSS instruction emulation.
(opcode 0xc4, 0xc5, 0x0f 0xb2, 0x0f 0xb4~0xb5)

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
 2010-10-24 10:51:20 +02:00
Avi Kivity
6142914280 KVM: x86 emulator: implement CWD (opcode 99) 
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:16 +02:00
Avi Kivity
d46164dbd9 KVM: x86 emulator: implement IMUL REG, R/M, IMM (opcode 69) 
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:16 +02:00
Avi Kivity
7db41eb762 KVM: x86 emulator: add Src2Imm decoding 
Needed for 3-operand IMUL.

Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:15 +02:00
Avi Kivity
39f21ee546 KVM: x86 emulator: consolidate immediate decode into a function 
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:14 +02:00
Avi Kivity
48bb5d3c40 KVM: x86 emulator: implement RDTSC (opcode 0F 31) 
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:14 +02:00
Avi Kivity
7077aec0bc KVM: x86 emulator: remove SrcImplicit 
Useless.

Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:13 +02:00
Avi Kivity
5c82aa2998 KVM: x86 emulator: implement IMUL REG, R/M (opcode 0F AF) 
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:12 +02:00
Avi Kivity
f3a1b9f496 KVM: x86 emulator: implement IMUL REG, R/M, imm8 (opcode 6B) 
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:12 +02:00
Avi Kivity
40ece7c729 KVM: x86 emulator: implement RET imm16 (opcode C2) 
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:12 +02:00
Avi Kivity
b250e60589 KVM: x86 emulator: add SrcImmU16 operand type 
Used for RET NEAR instructions.

Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:12 +02:00
Avi Kivity
0ef753b8c3 KVM: x86 emulator: implement CALL FAR (FF /3) 
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:12 +02:00
Avi Kivity
7af04fc05c KVM: x86 emulator: implement DAS (opcode 2F) 
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:11 +02:00
Avi Kivity
fb2c264105 KVM: x86 emulator: Use a register for ____emulate_2op() destination 
Most x86 two operand instructions allow the destination to be a memory operand,
but IMUL (for example) requires that the destination be a register.  Change
____emulate_2op() to take a register for both source and destination so we
can invoke IMUL.

Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:11 +02:00
Avi Kivity
b3b3d25a12 KVM: x86 emulator: pass destination type to ____emulate_2op() 
We'll need it later so we can use a register for the destination.

Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:11 +02:00
Wei Yongjun
f2f3184534 KVM: x86 emulator: add LOOP/LOOPcc instruction emulation 
Add LOOP/LOOPcc instruction emulation (opcode 0xe0~0xe2).

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:11 +02:00
Wei Yongjun
e8b6fa70e3 KVM: x86 emulator: add CBW/CWDE/CDQE instruction emulation 
Add CBW/CWDE/CDQE instruction emulation.(opcode 0x98)
Used by FreeBSD's boot loader.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:11 +02:00
Avi Kivity
0fa6ccbd28 KVM: x86 emulator: fix REPZ/REPNZ termination condition 
EFLAGS.ZF needs to be checked after each iteration, not before.

Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:10 +02:00
Avi Kivity
f6b33fc504 KVM: x86 emulator: implement SCAS (opcodes AE, AF) 
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:10 +02:00
Avi Kivity
5c56e1cf7a KVM: x86 emulator: fix INTn emulation not pushing EFLAGS and CS 
emulate_push() only schedules a push; it doesn't actually push anything.
Call writeback() to flush out the write.

Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:09 +02:00
Wei Yongjun
a13a63faa6 KVM: x86 emulator: remove dup code of in/out instruction 
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:09 +02:00
Wei Yongjun
41167be544 KVM: x86 emulator: change OUT instruction to use dst instead of src 
Change OUT instruction to use dst instead of src, so we can
reuse those code for all out instructions.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:09 +02:00
Wei Yongjun
943858e275 KVM: x86 emulator: introduce DstImmUByte for dst operand decode 
Introduce DstImmUByte for dst operand decode, which
will be used for out instruction.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:09 +02:00
Wei Yongjun
c483c02ad3 KVM: x86 emulator: remove useless label from x86_emulate_insn() 
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:09 +02:00
Wei Yongjun
ee45b58efe KVM: x86 emulator: add setcc instruction emulation 
Add setcc instruction emulation (opcode 0x0f 0x90~0x9f)

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:08 +02:00
Wei Yongjun
92f738a52b KVM: x86 emulator: add XADD instruction emulation 
Add XADD instruction emulation (opcode 0x0f 0xc0~0xc1)

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:06 +02:00
Wei Yongjun
31be40b398 KVM: x86 emulator: put register operand write back to a function 
Introduce function write_register_operand() to write back the
register operand.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:06 +02:00
Wei Yongjun
d9574a25af KVM: x86 emulator: add bsf/bsr instruction emulation 
Add bsf/bsr instruction emulation (opcode 0x0f 0xbc~0xbd)

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
 2010-10-24 10:51:04 +02:00