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SubjectRe: [PATCH 0/6] kvm: Emulate MOVBE, v3
Il 22/09/2013 16:44, Borislav Petkov ha scritto:
> From: Borislav Petkov <bp@suse.de>
>
> Alriiight,
>
> here's another version of the patchset, hopefully addressing all review
> feedback from last time. 6/6 is the respective qemu patch to handle
> emulated features query, etc.
>
> It is still a lot of fun to generate fast! Atom 32-bit SMP guests like
> this:
>
> [ 0.022876] ..TIMER: vector=0x30 apic1=0 pin1=2 apic2=-1 pin2=-1
> [ 0.033304] smpboot: CPU0: Intel(R) Atom(TM) CPU N270 @ 1.60GHz (fam: 06, model: 1c, stepping: 02)
> [ 0.037000] APIC calibration not consistent with PM-Timer: 146ms instead of 100ms
> [ 0.037000] APIC delta adjusted to PM-Timer: 6249937 (9125627)
> [ 0.037066] Performance Events: unsupported p6 CPU model 28 no PMU driver, software events only.
> [ 0.043605] SMP alternatives: lockdep: fixing up alternatives
> [ 0.044030] CPU 1 irqstacks, hard=f450c000 soft=f450e000
> [ 0.045004] smpboot: Booting Node 0, Processors #1[ 0.004000] Initializing CPU#1
> [ 0.004000] Atom PSE erratum detected, BIOS microcode update recommended
>
> [ 0.120290] SMP alternatives: lockdep: fixing up alternatives
> [ 0.121007] CPU 2 irqstacks, hard=f451c000 soft=f451e000
> [ 0.122003] #2[ 0.004000] Initializing CPU#2
> [ 0.004000] Atom PSE erratum detected, BIOS microcode update recommended
>
> ...
>
> [ 0.667192] SMP alternatives: lockdep: fixing up alternatives
> [ 0.668007] CPU 7 irqstacks, hard=f45b0000 soft=f45b2000
> [ 0.669010] #7 OK
> [ 0.004000] Initializing CPU#7
> [ 0.004000] Atom PSE erratum detected, BIOS microcode update recommended
> [ 0.781052] Brought up 8 CPUs
> [ 0.781917] smpboot: Total of 8 processors activated (57461.27 BogoMIPS)
>
> LooL :-)
>
> Comments and suggestions appreciated, as always!
>
> Thanks.
>
> Borislav Petkov (5):
> kvm: Add KVM_GET_EMULATED_CPUID
> kvm, emulator: Use opcode length
> kvm, emulator: Rename VendorSpecific flag
> kvm, emulator: Add initial three-byte insns support
> kvm: Emulate MOVBE
>
> Documentation/virtual/kvm/api.txt | 77 +++++++++++++++++++++++++++++--
> arch/x86/include/asm/kvm_emulate.h | 10 ++--
> arch/x86/include/uapi/asm/kvm.h | 6 +--
> arch/x86/kvm/cpuid.c | 75 +++++++++++++++++++++++++++---
> arch/x86/kvm/cpuid.h | 5 +-
> arch/x86/kvm/emulate.c | 94 ++++++++++++++++++++++++++++++++++----
> arch/x86/kvm/x86.c | 16 ++++---
> include/uapi/linux/kvm.h | 2 +
> 8 files changed, 251 insertions(+), 34 deletions(-)
>
> Borislav Petkov (1):
> qemu: Add support for emulated CPU features
>
> include/sysemu/kvm.h | 4 ++++
> linux-headers/linux/kvm.h | 4 ++++
> target-i386/cpu.c | 7 +++++++
> target-i386/kvm.c | 38 ++++++++++++++++++++++++++++++++++----
> 4 files changed, 49 insertions(+), 4 deletions(-)
>

I tested this patch manually with a small C test program and asm.

Would you please prepare a patch to kvm-unit-tests that stresses the new
codepath?

Paolo


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