This is a note to let you know that I've just added the patch titled KVM: x86/mmu: Use yield-safe TDP MMU root iter in MMU notifier unmapping to the 5.15-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: kvm-x86-mmu-use-yield-safe-tdp-mmu-root-iter-in-mmu-.patch and it can be found in the queue-5.15 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit b6d49e59a28b2f32843078a88e9867be0f4d4539 Author: Sean Christopherson <seanjc@xxxxxxxxxx> Date: Sat Nov 20 01:50:08 2021 +0000 KVM: x86/mmu: Use yield-safe TDP MMU root iter in MMU notifier unmapping [ Upstream commit 7533377215b6ee432c06c5855f6be5d66e694e46 ] Use the yield-safe variant of the TDP MMU iterator when handling an unmapping event from the MMU notifier, as most occurences of the event allow yielding. Fixes: e1eed5847b09 ("KVM: x86/mmu: Allow yielding during MMU notifier unmap/zap, if possible") Cc: stable@xxxxxxxxxxxxxxx Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> Message-Id: <20211120015008.3780032-1-seanjc@xxxxxxxxxx> Signed-off-by: Paolo Bonzini <pbonzini@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/arch/x86/kvm/mmu/tdp_mmu.c b/arch/x86/kvm/mmu/tdp_mmu.c index 853780eb033b..6195f0d219ae 100644 --- a/arch/x86/kvm/mmu/tdp_mmu.c +++ b/arch/x86/kvm/mmu/tdp_mmu.c @@ -1100,7 +1100,7 @@ bool kvm_tdp_mmu_unmap_gfn_range(struct kvm *kvm, struct kvm_gfn_range *range, { struct kvm_mmu_page *root; - for_each_tdp_mmu_root(kvm, root, range->slot->as_id) + for_each_tdp_mmu_root_yield_safe(kvm, root, range->slot->as_id, false) flush = zap_gfn_range(kvm, root, range->start, range->end, range->may_block, flush, false);