On Thu, 10 Oct 2024 19:10:32 -0700, Sean Christopherson wrote: > This is effectively an extensive of the kvm_follow_pfn series[*] (and > applies on top of said series), but is x86-specific and is *almost* > entirely related to Accessed and Dirty bits. > > There's no central theme beyond cleaning up things that were discovered > when digging deep for the kvm_follow_pfn overhaul, and to a lesser extent > the series to add MGLRU support in KVM x86. > > [...] Applied to kvm-x86 mmu, with Paolo's suggestions (the guard(rcu) trick in particular was quite nice). [01/18] KVM: x86/mmu: Flush remote TLBs iff MMU-writable flag is cleared from RO SPTE https://github.com/kvm-x86/linux/commit/081976992f43 [02/18] KVM: x86/mmu: Always set SPTE's dirty bit if it's created as writable https://github.com/kvm-x86/linux/commit/cc7ed3358e41 [03/18] KVM: x86/mmu: Fold all of make_spte()'s writable handling into one if-else https://github.com/kvm-x86/linux/commit/0387d79e24d6 [04/18] KVM: x86/mmu: Don't force flush if SPTE update clears Accessed bit https://github.com/kvm-x86/linux/commit/b7ed46b201a4 [05/18] KVM: x86/mmu: Don't flush TLBs when clearing Dirty bit in shadow MMU https://github.com/kvm-x86/linux/commit/856cf4a60cff [06/18] KVM: x86/mmu: Drop ignored return value from kvm_tdp_mmu_clear_dirty_slot() https://github.com/kvm-x86/linux/commit/010344122dca [07/18] KVM: x86/mmu: Fold mmu_spte_update_no_track() into mmu_spte_update() https://github.com/kvm-x86/linux/commit/67c93802928b [08/18] KVM: x86/mmu: WARN and flush if resolving a TDP MMU fault clears MMU-writable https://github.com/kvm-x86/linux/commit/1a175082b190 [09/18] KVM: x86/mmu: Add a dedicated flag to track if A/D bits are globally enabled https://github.com/kvm-x86/linux/commit/a5da5dde4ba4 [10/18] KVM: x86/mmu: Set shadow_accessed_mask for EPT even if A/D bits disabled https://github.com/kvm-x86/linux/commit/3835819fb1b3 [11/18] KVM: x86/mmu: Set shadow_dirty_mask for EPT even if A/D bits disabled https://github.com/kvm-x86/linux/commit/53510b912518 [12/18] KVM: x86/mmu: Use Accessed bit even when _hardware_ A/D bits are disabled https://github.com/kvm-x86/linux/commit/7971801b5618 [13/18] KVM: x86/mmu: Process only valid TDP MMU roots when aging a gfn range https://github.com/kvm-x86/linux/commit/526e609f0567 [14/18] KVM: x86/mmu: Stop processing TDP MMU roots for test_age if young SPTE found https://github.com/kvm-x86/linux/commit/51192ebdd145 [15/18] KVM: x86/mmu: Dedup logic for detecting TLB flushes on leaf SPTE changes https://github.com/kvm-x86/linux/commit/c9b625625ba3 [16/18] KVM: x86/mmu: Set Dirty bit for new SPTEs, even if _hardware_ A/D bits are disabled https://github.com/kvm-x86/linux/commit/85649117511d [17/18] KVM: Allow arch code to elide TLB flushes when aging a young page https://github.com/kvm-x86/linux/commit/2ebbe0308c29 [18/18] KVM: x86: Don't emit TLB flushes when aging SPTEs for mmu_notifiers https://github.com/kvm-x86/linux/commit/b9883ee40d7e -- https://github.com/kvm-x86/linux/tree/next