BMC/Intel-BMC/linux.git/arch/x86/include/asm/kvm_emulate.h, branch dev

KVM: x86: stubs for SMM support

2015-06-04T14:01:45+00:00

This patch adds the interface between x86.c and the emulator: the SMBASE register, a new emulator flag, the RSM instruction. It also adds a new request bit that will be used by the KVM_SMI ioctl. Reviewed-by: Radim Krčmář Signed-off-by: Paolo Bonzini

KVM: x86: pass the whole hflags field to emulator and back

2015-06-04T14:01:05+00:00

The hflags field will contain information about system management mode and will be useful for the emulator. Pass the entire field rather than just the guest-mode information. Reviewed-by: Radim Krčmář Signed-off-by: Paolo Bonzini

KVM: x86: IRET emulation does not clear NMI masking

2015-01-26T11:14:42+00:00

The IRET instruction should clear NMI masking, but the current implementation does not do so. Signed-off-by: Nadav Amit Signed-off-by: Paolo Bonzini

KVM: emulate: put pointers in the fetch_cache

2014-07-11T07:14:03+00:00

This simplifies the code a bit, especially the overflow checks. Signed-off-by: Paolo Bonzini

KVM: emulate: do not initialize memopp

2014-07-11T07:14:01+00:00

rip_relative is only set if decode_modrm runs, and if you have ModRM you will also have a memopp. We can then access memopp unconditionally. Note that rip_relative cannot be hoisted up to decode_modrm, or you break "mov $0, xyz(%rip)". Also, move typecast on "out of range value" of mem.ea to decode_modrm. Together, all these optimizations save about 50 cycles on each emulated instructions (4-6%). Signed-off-by: Bandan Das [Fix immediate operands with rip-relative addressing. - Paolo] Signed-off-by: Paolo Bonzini

KVM: emulate: rework seg_override

2014-07-11T07:14:01+00:00

x86_decode_insn already sets a default for seg_override, so remove it from the zeroed area. Also replace set/get functions with direct access to the field. Signed-off-by: Bandan Das Signed-off-by: Paolo Bonzini

KVM: emulate: clean up initializations in init_decode_cache

2014-07-11T07:14:00+00:00

A lot of initializations are unnecessary as they get set to appropriate values before actually being used. Optimize placement of fields in x86_emulate_ctxt Signed-off-by: Bandan Das Signed-off-by: Paolo Bonzini

KVM: emulate: move init_decode_cache to emulate.c

2014-07-11T07:13:59+00:00

Core emulator functions all belong in emulator.c, x86 should have no knowledge of emulator internals Signed-off-by: Bandan Das Signed-off-by: Paolo Bonzini

KVM: emulate: speed up emulated moves

2014-07-11T07:13:58+00:00

We can just blindly move all 16 bytes of ctxt->src's value to ctxt->dst. write_register_operand will take care of writing only the lower bytes. Avoiding a call to memcpy (the compiler optimizes it out) gains about 200 cycles on kvm-unit-tests for register-to-register moves, and makes them about as fast as arithmetic instructions. We could perhaps get a larger speedup by moving all instructions _except_ moves out of x86_emulate_insn, removing opcode_len, and replacing the switch statement with an inlined em_mov. Signed-off-by: Paolo Bonzini

KVM: nSVM: Set correct port for IOIO interception evaluation

2014-07-09T16:09:56+00:00

Obtaining the port number from DX is bogus as a) there are immediate port accesses and b) user space may have changed the register content while processing the PIO access. Forward the correct value from the instruction emulator instead. Signed-off-by: Jan Kiszka Signed-off-by: Paolo Bonzini