Re: [PATCH 5.10.y 04/17] KVM: x86/mmu: Ensure MMU pages are available when allocating roots

[Sasha Levin]

> [PATCH 5.10.y 04/17] KVM: x86/mmu: Ensure MMU pages are available when allocating roots

On 5.10 mmu_lock is still a spinlock. Hoisting it into kvm_mmu_load() means
mmu_alloc_shadow_roots() -> mmu->get_pdptr() -> kvm_vcpu_read_guest_page()
can sleep under the spinlock on the nested-SVM PAE path. The fix for that,
4a38162ee9f1 ("KVM: MMU: load PDPTRs outside mmu_lock"), isn't in the series.

Do we need that one too?

-- 
Thanks,
Sasha