On Mon, 08 Jan 2024 14:30:14 +0800, Dan Wu wrote:
> KVM switched to use interrupt for 'page ready' APF event since Linux v5.10 and
> the legacy mechanism using #PF was deprecated. Interrupt-based 'page-ready'
> notification requires KVM_ASYNC_PF_DELIVERY_AS_INT to be set as well in
> MSR_KVM_ASYNC_PF_EN to enable asyncpf.
>
> Update asyncpf.c for the new interrupt-based notification.
> It checks (KVM_FEATURE_ASYNC_PF && KVM_FEATURE_ASYNC_PF_INT) and implement
> interrupt-based 'page-ready' handler.
>
> [...]
Applied to kvm-x86 next, with one tweak. To avoid failures in the common case
of running without configuring cgroups, I changed the asyncpf_num check to skip
instead of assert:
if (!asyncpf_num)
report_skip("No async page fault events, cgroup configuration likely needed");
else
report_pass("Serviced %d async page faults events (!PRESENT #PF + READY IRQ)",
asyncpf_num);
Thanks!
[1/1] x86/asyncpf: fix async page fault issues
https://github.com/kvm-x86/kvm-unit-tests/commit/3ed8e382d4cb
--
https://github.com/kvm-x86/kvm-unit-tests/tree/next
