On Thu, Aug 13, 2020 at 02:05:13PM +0800, Peng Liang wrote: > In AArch64, guest will read the same values of the ID regsiters with > host. Both of them read the values from arm64_ftr_regs. This patch > series add support to emulate and configure ID registers so that we can > control the value of ID registers that guest read. > > Peng Liang (4): > arm64: add a helper function to traverse arm64_ftr_regs > kvm: arm64: emulate the ID registers > kvm: arm64: make ID registers configurable > kvm: arm64: add KVM_CAP_ARM_CPU_FEATURE extension > > arch/arm64/include/asm/cpufeature.h | 2 ++ > arch/arm64/include/asm/kvm_host.h | 2 ++ > arch/arm64/kernel/cpufeature.c | 13 ++++++++ > arch/arm64/kvm/arm.c | 21 ++++++++++++ > arch/arm64/kvm/sys_regs.c | 50 ++++++++++++++++++++++------- > include/uapi/linux/kvm.h | 12 +++++++ > 6 files changed, 89 insertions(+), 11 deletions(-) > > -- > 2.18.4 > > _______________________________________________ > kvmarm mailing list > kvmarm@xxxxxxxxxxxxxxxxxxxxx > https://lists.cs.columbia.edu/mailman/listinfo/kvmarm > Hi Peng, I'm glad to see an effort has started in trying to prepare for CPU models, allowing migration beyond identical hosts. How have you tested this series? I.e. what userspace did you use and with what additional patches? KVM changes like these are also easily tested with KVM selftests[*]. Have you considered posting a selftest? [*] Linux repo: tools/testing/selftests/kvm/ Thanks, drew
