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2010-10-24KVM: rename x86 kvm->arch.n_alloc_mmu_pagesDave Hansen2-5/+5
arch.n_alloc_mmu_pages is a poor choice of name. This value truly means, "the number of pages which _may_ be allocated". But, reading the name, "n_alloc_mmu_pages" implies "the number of allocated mmu pages", which is dead wrong. It's really the high watermark, so let's give it a name to match: nr_max_mmu_pages. This change will make the next few patches much more obvious and easy to read. Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com> Signed-off-by: Tim Pepper <lnxninja@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: abstract kvm x86 mmu->n_free_mmu_pagesDave Hansen2-8/+10
"free" is a poor name for this value. In this context, it means, "the number of mmu pages which this kvm instance should be able to allocate." But "free" implies much more that the objects are there and ready for use. "available" is a much better description, especially when you see how it is calculated. In this patch, we abstract its use into a function. We'll soon replace the function's contents by calculating the value in a different way. All of the reads of n_free_mmu_pages are taken care of in this patch. The modification sites will be handled in a patch later in the series. Signed-off-by: Dave Hansen <dave@linux.vnet.ibm.com> Signed-off-by: Tim Pepper <lnxninja@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: implement CWD (opcode 99)Avi Kivity1-1/+14
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: implement IMUL REG, R/M, IMM (opcode 69)Avi Kivity1-1/+2
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: add Src2Imm decodingAvi Kivity1-0/+4
Needed for 3-operand IMUL. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: consolidate immediate decode into a functionAvi Kivity1-45/+64
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: implement RDTSC (opcode 0F 31)Avi Kivity1-1/+18
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: remove SrcImplicitAvi Kivity1-2/+1
Useless. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: implement IMUL REG, R/M (opcode 0F AF)Avi Kivity1-3/+10
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: implement IMUL REG, R/M, imm8 (opcode 6B)Avi Kivity1-1/+11
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: implement RET imm16 (opcode C2)Avi Kivity1-1/+18
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: add SrcImmU16 operand typeAvi Kivity1-3/+9
Used for RET NEAR instructions. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: implement CALL FAR (FF /3)Avi Kivity1-1/+36
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: implement DAS (opcode 2F)Avi Kivity1-1/+41
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: Use a register for ____emulate_2op() destinationAvi Kivity1-1/+1
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 Kivity1-6/+6
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 Yongjun1-1/+7
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 Yongjun1-1/+8
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 Kivity1-21/+20
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 Kivity1-3/+2
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: fix INTn emulation not pushing EFLAGS and CSAvi Kivity1-1/+12
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 Yongjun1-20/+4
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 Yongjun1-7/+8
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 Yongjun1-0/+7
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 Yongjun1-5/+1
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 Yongjun1-1/+4
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 Yongjun1-1/+8
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 Yongjun1-32/+23
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: Separate emulation context initialization in a separate functionMohammed Gamal1-29/+25
The code for initializing the emulation context is duplicated at two locations (emulate_instruction() and kvm_task_switch()). Separate it in a separate function and call it from there. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: add bsf/bsr instruction emulationWei Yongjun1-2/+26
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 Gamal1-3/+3
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 Gamal1-1/+40
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 Yongjun1-7/+4
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 Yongjun1-1/+1
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 Yongjun1-6/+18
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 Gamal1-1/+4
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 Yongjun1-2/+1
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 Yongjun1-17/+6
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 Yongjun1-3/+2
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 Gamal1-0/+78
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: Allow accessing IDT via emulator opsMohammed Gamal1-0/+6
The patch adds a new member get_idt() to x86_emulate_ops. It also adds a function to get the idt in order to be used by the emulator. This is needed for real mode interrupt injection and the emulation of int instructions. 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 Yongjun1-7/+5
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 Gamal1-1/+1
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 Kivity1-68/+57
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 Kivity1-1/+1
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 Kivity1-2/+2
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 Kivity1-2/+4
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 Kivity1-5/+4
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 Kivity1-5/+4
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 Kivity1-2/+2
Signed-off-by: Avi Kivity <avi@redhat.com>
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