-----Original Message----- > From: Marc Zyngier [mailto:maz@xxxxxxxxxx] > Sent: Friday, April 17, 2020 11:06 PM > To: Zengtao (B) > Cc: George Cherian; Dave.Martin@xxxxxxx; alexandru.elisei@xxxxxxx; > andre.przywara@xxxxxxx; christoffer.dall@xxxxxxx; > james.morse@xxxxxxx; jintack@xxxxxxxxxxxxxxx; > julien.thierry.kdev@xxxxxxxxx; kvm@xxxxxxxxxxxxxxx; > kvmarm@xxxxxxxxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; > suzuki.poulose@xxxxxxx; Anil Kumar Reddy H; Ganapatrao Kulkarni > Subject: Re: [PATCH v2 00/94] KVM: arm64: ARMv8.3/8.4 Nested > Virtualization support > > On Thu, 16 Apr 2020 19:22:21 +0100 > Marc Zyngier <maz@xxxxxxxxxx> wrote: > > > Hi Zengtao, > > > > On 2020-04-16 02:38, Zengtao (B) wrote: > > > Hi Marc: > > > > > > Got it. > > > Really a bit patch set :) > > > > Well, yeah... ;-) > > > > > > > > BTW, I have done a basic kvm unit test > > > git://git.kernel.org/pub/scm/virt/kvm/kvm-unit-tests.git > > > And I find that after apply the patch KVM: arm64: VNCR-ize ELR_EL1, > > > The psci test failed for some reason, I can't understand why, this > > > is only the test result.(find the patch by git bisect + kvm test) > > > > That it is that mechanical, we should be able to quickly nail that one. > > > > > My platform: Hisilicon D06 board. > > > Linux kernel: Linux 5.6-rc6 + nv patches(some rebases) > > > Could you help to take a look? > > > > I'll have a look tomorrow. I'm in the middle of refactoring the series > > for 5.7, and things have changed quite a bit. Hopefully this isn't a VHE > > vs non-VHE issue. > > So I've repeatedly tried with the current state of the NV patches[1], > on both an ARMv8.0 system (Seattle) and an ARMv8.2 pile of putrid junk > (vim3l). PSCI is pretty happy, although I can only test with at most 8 > vcpus (GICv2 gets in the way). > > Can you please: > > - post the detailed error by running the PSCI unit test on its own I tried to trace the error, and I found in kernel function kvm_mpidr_to_vcpu, casually, mpidr returns zero and we can't get the expected vcpu, and psci test failed due to this. And as I mentioned in my last before, the psci error is introduced by the patch KVM: arm64: VNCR-ize ELR_EL1.(Only test result) Maybe you have to try tens of times to reproduce. :) Deep into the patch itself, I don't find any connection between the patch and the issue. > - test with the current state of the patches I test with your nv-5.7-rc1-WIP branch and latest kvm_unit_test, the error still exist. Thanks. zengtao > > Thanks, > > M. > > [1] > https://git.kernel.org/pub/scm/linux/kernel/git/maz/arm-platforms.git/l > og/?h=kvm-arm64/nv-5.7-rc1-WIP > -- > Jazz is not dead. It just smells funny...
