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2010-10-24KVM: x86 emulator: introduce Op3264 for mov cr and mov dr instructionsAvi Kivity1-0/+8
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 Kivity1-3/+2
(x && (x & y)) == (x & y) Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: drop use_modrm_eaAvi Kivity1-1/+0
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 Kivity1-40/+21
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 Kivity1-11/+4
Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: simplify xchg decode tablesAvi Kivity1-1/+1
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 Kivity1-60/+57
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 Kivity1-4/+6
Let it compute modrm_seg instead, and have the caller apply it. Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: SVM: Check for asid != 0 on nested vmrunJoerg Roedel1-0/+3
This patch lets a nested vmrun fail if the L1 hypervisor left the asid zero. This fixes the asid_zero unit test. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: SVM: Check for nested vmrun intercept before emulating vmrunJoerg Roedel1-0/+19
This patch lets the nested vmrun fail if the L1 hypervisor has not intercepted vmrun. This fixes the "vmrun intercept check" unit test. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: MMU: mark page dirty only when page is really writtenXiao Guangrong1-19/+28
Mark page dirty only when this page is really written, it's more exacter, and also can fix dirty page marking in speculation path Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: MMU: move bits lost judgement into a separate functionXiao Guangrong1-3/+17
Introduce spte_has_volatile_bits() function to judge whether spte bits will miss, it's more readable and can help us to cleanup code later Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: MMU: using kvm_set_pfn_accessed() instead of mark_page_accessed()Xiao Guangrong1-1/+1
It's a small cleanup that using using kvm_set_pfn_accessed() instead of mark_page_accessed() Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2010-10-24KVM: x86 emulator: check io permissions only once for string pioGleb Natapov2-0/+7
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 Kivity1-1/+1
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: don't update vcpu state if instruction is restartedGleb Natapov1-18/+13
No need to update vcpu state since instruction is in the middle of the emulation. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: convert some push instructions to direct decodeAvi Kivity1-9/+9
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 Kivity1-8/+8
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 Kivity1-236/+236
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 Kivity1-372/+372
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 Kivity1-0/+12
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 Kivity2-6/+9
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>
2010-10-24KVM: x86 emulator: move ByteOp and Dst back to bits 0:3Avi Kivity1-8/+8
Now that the group index no longer exists, the space is free. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: drop support for old-style groupsAvi Kivity1-25/+7
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: convert group 9 to new styleAvi Kivity1-6/+8
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: convert group 8 to new styleAvi Kivity1-4/+6
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: convert group 7 to new styleAvi Kivity1-8/+10
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: convert group 5 to new styleAvi Kivity1-4/+6
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: convert group 4 to new styleAvi Kivity1-4/+6
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: convert group 3 to new styleAvi Kivity1-4/+6
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: convert group 1A to new styleAvi Kivity1-4/+6
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: convert group 1 to new styleAvi Kivity1-7/+9
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: allow specifying group directly in opcodeAvi Kivity1-9/+38
Instead of having a group number, store the group table pointer directly in the opcode. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: reserve group code 0Avi Kivity1-1/+1
We'll be using that to distinguish between new-style and old-style groups. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: move group tables to topAvi Kivity1-38/+38
No code changes. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: Add wrappers for easily defining opcodesAvi Kivity1-144/+150
Once 'struct opcode' grows, its initializer will become more complicated. Wrap the simple initializers in a D() macro, and replace the empty initializers with an even simpler N macro. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: introduce 'struct opcode'Avi Kivity1-8/+12
This will hold all the information known about the opcode. Currently, this is just the decode flags. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: drop parentheses in repreat macrosAvi Kivity1-3/+3
The parenthese make is impossible to use the macros with initializers that require braces. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: Add IRET instructionMohammed Gamal1-0/+81
Ths patch adds IRET instruction (opcode 0xcf). Currently, only IRET in real mode is emulated. Protected mode support is to be added later if needed. Signed-off-by: Mohammed Gamal <m.gamal005@gmail.com> Reviewed-by: Avi Kivity <avi@redhat.com> Reviewed-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: SVM: Emulate next_rip svm featureJoerg Roedel1-1/+7
This patch implements the emulations of the svm next_rip feature in the nested svm implementation in kvm. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: SVM: Sync efer back into nested vmcbJoerg Roedel1-0/+1
This patch fixes a bug in a nested hypervisor that heavily switches between real-mode and long-mode. The problem is fixed by syncing back efer into the guest vmcb on emulated vmexit. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: MMU: remove valueless output messageXiao Guangrong1-6/+5
After commit 53383eaad08d, the '*spte' has updated before call rmap_remove()(in most case it's 'shadow_trap_nonpresent_pte'), so remove this information from error message Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: VMX: Use host_gdt variable wherever we need the host gdtAvi Kivity1-9/+6
Now that we have the host gdt conveniently stored in a variable, make use of it instead of querying the cpu. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: unify the two Group 3 variantsAvi Kivity1-8/+3
Use just one group table for byte (F6) and word (F7) opcodes. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: Allow LOCK prefix for NEG and NOTAvi Kivity1-2/+2
Opcodes F6/2, F6/3, F7/2, F7/3. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: simplify Group 1 decodingAvi Kivity1-40/+7
Move operand decoding to the opcode table, keep lock decoding in the group table. This allows us to get consolidate the four variants of Group 1 into one group. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: mix decode bits from opcode and group decode tablesAvi Kivity1-4/+6
Allow bits that are common to all members of a group to be specified in the opcode table instead of the group table. This allows some simplification of the decode tables. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: add Undefined decode flagAvi Kivity1-1/+2
Add a decode flag to indicate the instruction is invalid. Will come in useful later, when we mix decode bits from the opcode and group table. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: Make group storage bits separate from operand bitsAvi Kivity1-9/+9
Currently group bits are stored in bits 0:7, where operand bits are stored. Make group bits be 0:3, and move the existing bits 0:3 to 16:19, so we can mix group and operand bits. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2010-10-24KVM: x86 emulator: consolidate Jcc rel32 decodingAvi Kivity1-2/+1
Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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