[PATCH v3 9/9] KVM: arm64: Reserve pKVM handle during pkvm_init_host_vm()

[Fuad Tabba]

Hi Mark,

On Mon, 8 Sept 2025 at 19:52, Mark Brown <broonie at kernel.org> wrote:
>
> On Mon, Sep 08, 2025 at 05:05:56PM +0100, Mark Brown wrote:
>
> > I'm seeing the KVM selftests failing in -next on multiple nVHE
> > platforms (pretty sure it's all of them) which bisect down to this
> > commit, when booted in standard nVHE mode the selftests are all failing
> > to initialise with:
>
> I'm seeing a different failure on the same commit with qemu in VHE mode,
> we fault during pkvm_init_host():

I can reproduce this too. It's the same issue. Fix coming soon.

Cheers,
/fuad

> <12>[  112.802609] kselftest: Running tests in kvm
> TAP version 13
> 1..34
> # timeout set to 120
> # selftests: kvm: demand_paging_test
> <2>[  113.800187] Unhandled 64-bit el1h sync exception on CPU0, ESR 0x000000005a000000 -- HVC (AArch64)
> ...
> <4>[  113.812056] Call trace:
> <4>[  113.812571]  show_stack+0x18/0x24 (C)
> <4>[  113.813078]  dump_stack_lvl+0x60/0x80
> <4>[  113.813448]  dump_stack+0x18/0x24
> <4>[  113.813711]  vpanic+0x124/0x2ec
> <4>[  113.813965]  abort+0x0/0x4
> <4>[  113.814198]  arm64_exit_nmi.isra.0+0x0/0x94
> <4>[  113.814517]  el1h_64_sync_handler+0x2c/0xac
> <4>[  113.814812]  el1h_64_sync+0x6c/0x70
> <4>[  113.815266]  pkvm_init_host_vm+0x20/0x48 (P)
> <4>[  113.815629]  kvm_dev_ioctl+0x264/0x80c
> <4>[  113.815960]  __arm64_sys_ioctl+0xac/0x104
>
> Full log:
>
>    https://lava.sirena.org.uk/scheduler/job/1794785#L2258