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* KVM: x86 emulator: fix hypercall return value on AMDAvi Kivity2008-06-061-1/+2
| | | | | | | | | | | | | | | | | | The hypercall instructions on Intel and AMD are different. KVM allows the guest to choose one or the other (the default is Intel), and if the guest chooses incorrectly, KVM will patch it at runtime to select the correct instruction. This allows live migration between Intel and AMD machines. This patching occurs in the x86 emulator. The current code also executes the hypercall. Unfortunately, the tail end of the x86 emulator code also executes, overwriting the return value of the hypercall with the original contents of rax (which happens to be the hypercall number). Fix not by executing the hypercall in the emulator context; instead let the guest reissue the patched instruction and execute the hypercall via the normal path. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: fix writes to registers with modrm encodingsAvi Kivity2008-05-181-2/+5
| | | | | | | | | A register destination encoded with a mod=3 encoding left dst.ptr NULL. Normally we don't trap writes to registers, but in the case of smsw, we do. Fix by pointing dst.ptr at the destination register. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: disable writeback on lmswAvi Kivity2008-05-041-0/+1
| | | | | | | | | | The recent changes allowing memory operands with lmsw and smsw left lmsw with writeback enabled. Since lmsw has no oridinary destination operand, the dst pointer was not initialized, resulting in an oops. Close the hole by disabling writeback for lmsw. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: fix lea to really get the effective addressAvi Kivity2008-04-271-1/+1
| | | | | | We never hit this, since there is currently no reason to emulate lea. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: fix smsw and lmsw with a memory operandAvi Kivity2008-04-271-12/+17
| | | | | | | | lmsw and smsw were implemented only with a register operand. Extend them to support a memory operand as well. Fixes Windows running some display compatibility test on AMD hosts. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: initialize src.val and dst.val for register operandsAvi Kivity2008-04-271-0/+2
| | | | | | This lets us treat the case where mod == 3 in the same manner as other cases. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: fix sparse warnings in x86_emulate.cHarvey Harrison2008-04-271-2/+2
| | | | | | | | | | | | | | | Nesting __emulate_2op_nobyte inside__emulate_2op produces many shadowed variable warnings on the internal variable _tmp used by both macros. Change the outer macro to use __tmp. Avoids a sparse warning like the following at every call site of __emulate_2op arch/x86/kvm/x86_emulate.c:1091:3: warning: symbol '_tmp' shadows an earlier one arch/x86/kvm/x86_emulate.c:1091:3: originally declared here [18 more warnings suppressed] Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: make register_address_increment and JMP_REL static inlinesHarvey Harrison2008-04-271-30/+26
| | | | | | | Change jmp_rel() to a function as well. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: make register_address, address_mask static inlinesHarvey Harrison2008-04-271-19/+29
| | | | | Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: add ad_mask static inlineHarvey Harrison2008-04-271-3/+8
| | | | | | | Replaces open-coded mask calculation in macros. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: group decoding for group 1 instructionsAvi Kivity2008-04-271-2/+23
| | | | | | Opcodes 0x80-0x83 Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: add group 7 decodingAvi Kivity2008-04-271-2/+7
| | | | | | This adds group decoding for opcode 0x0f 0x01 (group 7). Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: Group decoding for groups 4 and 5Avi Kivity2008-04-271-30/+10
| | | | | | Add group decoding support for opcode 0xfe (group 4) and 0xff (group 5). Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: Group decoding for group 3Avi Kivity2008-04-271-24/+10
| | | | | | This adds group decoding support for opcodes 0xf6, 0xf7 (group 3). Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: group decoding for group 1AAvi Kivity2008-04-271-1/+7
| | | | | | This adds group decode support for opcode 0x8f. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: x86 emulator: add support for group decodingAvi Kivity2008-04-271-6/+27
| | | | | | | | | Certain x86 instructions use bits 3:5 of the byte following the opcode as an opcode extension, with the decode sometimes depending on bits 6:7 as well. Add support for this in the main decoding table rather than an ad-hock adaptation per opcode. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Move arch dependent files to new directory arch/x86/kvm/Avi Kivity2008-01-301-0/+1912
This paves the way for multiple architecture support. Note that while ioapic.c could potentially be shared with ia64, it is also moved. Signed-off-by: Avi Kivity <avi@qumranet.com>
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