summaryrefslogtreecommitdiff
path: root/arch/x86/kvm/emulate.c
AgeCommit message (Collapse)Author
2010-10-24KVM: x86 emulator: Use a register for ____emulate_2op() destinationAvi Kivity
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>
2010-10-24KVM: x86 emulator: pass destination type to ____emulate_2op()Avi Kivity
We'll need it later so we can use a register for the destination. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: add LOOP/LOOPcc instruction emulationWei Yongjun
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>
2010-10-24KVM: x86 emulator: add CBW/CWDE/CDQE instruction emulationWei Yongjun
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>
2010-10-24KVM: x86 emulator: fix REPZ/REPNZ termination conditionAvi Kivity
EFLAGS.ZF needs to be checked after each iteration, not before. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: implement SCAS (opcodes AE, AF)Avi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: fix INTn emulation not pushing EFLAGS and CSAvi Kivity
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>
2010-10-24KVM: x86 emulator: remove dup code of in/out instructionWei Yongjun
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: change OUT instruction to use dst instead of srcWei Yongjun
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>
2010-10-24KVM: x86 emulator: introduce DstImmUByte for dst operand decodeWei Yongjun
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>
2010-10-24KVM: x86 emulator: remove useless label from x86_emulate_insn()Wei Yongjun
Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: add setcc instruction emulationWei Yongjun
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>
2010-10-24KVM: x86 emulator: add XADD instruction emulationWei Yongjun
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>
2010-10-24KVM: x86 emulator: put register operand write back to a functionWei Yongjun
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>
2010-10-24KVM: x86 emulator: add bsf/bsr instruction emulationWei Yongjun
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>
2010-10-24KVM: x86 emulator: Fix emulate_grp3 return valuesMohammed Gamal
This patch lets emulate_grp3() return X86EMUL_* return codes instead of hardcoded ones. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: Add unary mul, imul, div, and idiv instructionsMohammed Gamal
This adds unary mul, imul, div, and idiv instructions (group 3 r/m 4-7). Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: mask group 8 instruction as BitOpWei Yongjun
Mask group 8 instruction as BitOp, so we can share the code for adjust the source operand. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: do not adjust the address for immediate sourceWei Yongjun
adjust the dst address for a register source but not adjust the address for an immediate source. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: fix negative bit offset BitOp instruction emulationWei Yongjun
If bit offset operands is a negative number, BitOp instruction will return wrong value. This patch fix it. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: Add stc instruction (opcode 0xf9)Mohammed Gamal
Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: using SrcOne for instruction d0/d1 decodingWei Yongjun
Using SrcOne for instruction d0/d1 decoding. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: disable writeback when decode dest operandWei Yongjun
This patch change to disable writeback when decode dest operand if the dest type is ImplicitOps or not specified. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: use SrcAcc to simplify stos decodingWei Yongjun
Use SrcAcc to simplify stos decoding. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: Add into, int, and int3 instructions (opcodes 0xcc-0xce)Mohammed Gamal
This adds support for int instructions to the emulator. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: simplify two-byte opcode checkWei Yongjun
Two-byte opcode always start with 0x0F and the decode flags of opcode 0xF0 is always 0, so remove dup check. Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: Fix nop emulationMohammed Gamal
If a nop instruction is encountered, we jump directly to the done label. This skip updating rip. Break from the switch case instead Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: Decode memory operands directly into a 'struct operand'Avi Kivity
Since modrm operand can be either register or memory, decoding it into a 'struct operand', which can represent both, is simpler. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: change invlpg emulation to use src.mem.addrAvi Kivity
Instead of using modrm_ea, which will soon be gone. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: switch LEA to use SrcMem decodingAvi Kivity
The NoAccess flag will prevent memory from being accessed. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: add NoAccess flag for memory instructions that skip accessAvi Kivity
Use for INVLPG, which accesses the tlb, not memory. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: use struct operand for mov reg,dr and mov dr,reg for reg opAvi Kivity
This is an ordinary modrm source or destination; use the standard structure representing it. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: use struct operand for mov reg,cr and mov cr,reg for reg opAvi Kivity
This is an ordinary modrm source or destination; use the standard structure representing it. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: mark mov cr and mov dr as 64-bit instructions in long modeAvi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: introduce Op3264 for mov cr and mov dr instructionsAvi Kivity
The operands for these instructions are 32 bits or 64 bits, depending on long mode, and ignoring REX prefixes, or the operand size prefix. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: simplify REX.W checkAvi Kivity
(x && (x & y)) == (x & y) Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: drop use_modrm_eaAvi Kivity
Unused (and has never been). Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: put register operand fetch into a functionAvi Kivity
The code is repeated three times, put it into fetch_register_operand() Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: use SrcAcc to simplify xchg decodingAvi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: simplify xchg decode tablesAvi Kivity
Use X8() to avoid repetition. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: use correct type for memory address in operandsAvi Kivity
Currently we use a void pointer for memory addresses. That's wrong since these are guest virtual addresses which are not directly dereferencable by the host. Use the correct type, unsigned long. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: push segment override out of decode_modrm()Avi Kivity
Let it compute modrm_seg instead, and have the caller apply it. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: check io permissions only once for string pioGleb Natapov
Do not recheck io permission on every iteration. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: fix LMSW able to clear cr0.peAvi Kivity
LMSW is documented not to be able to clear cr0.pe; make it so. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: convert some push instructions to direct decodeAvi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: allow repeat macro arguments to contain commasAvi Kivity
Needed for repeating instructions with execution functions. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: move decode tables downwardsAvi Kivity
So they can reference execution functions. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: move x86_decode_insn() downwardsAvi Kivity
No code changes. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: allow storing emulator execution function in decode tablesAvi Kivity
Instead of looking up the opcode twice (once for decode flags, once for the big execution switch) look up both flags and function in the decode tables. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: store x86_emulate_ops in emulation contextAvi Kivity
It doesn't ever change, so we don't need to pass it around everywhere. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-15 13:39:08 +0000