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Subject[PATCH v7 00/23] KVM: Extend Eager Page Splitting to the shadow MMU
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For the description of the "why" of this patch, I'll just direct you to
David's excellent cover letter from v6, which can be found at
https://lore.kernel.org/r/20220516232138.1783324-1-dmatlack@google.com.

This version mostly does the following:

- apply the feedback from Sean and other reviewers, which is mostly
aesthetic

- replace the refactoring of drop_large_spte()/__drop_large_spte()
with my own version. The insight there is that drop_large_spte()
is always followed by {,__}link_shadow_page(), so the call is
moved there

- split the TLB flush optimization into a separate patch, mostly
to perform the previous refactoring independent of the optional
TLB flush

- rename a few functions from *nested_mmu* to *shadow_mmu*

David Matlack (21):
KVM: x86/mmu: Optimize MMU page cache lookup for all direct SPs
KVM: x86/mmu: Use a bool for direct
KVM: x86/mmu: Stop passing "direct" to mmu_alloc_root()
KVM: x86/mmu: Derive shadow MMU page role from parent
KVM: x86/mmu: Always pass 0 for @quadrant when gptes are 8 bytes
KVM: x86/mmu: Decompose kvm_mmu_get_page() into separate functions
KVM: x86/mmu: Consolidate shadow page allocation and initialization
KVM: x86/mmu: Rename shadow MMU functions that deal with shadow pages
KVM: x86/mmu: Move guest PT write-protection to account_shadowed()
KVM: x86/mmu: Pass memory caches to allocate SPs separately
KVM: x86/mmu: Replace vcpu with kvm in kvm_mmu_alloc_shadow_page()
KVM: x86/mmu: Pass kvm pointer separately from vcpu to
kvm_mmu_find_shadow_page()
KVM: x86/mmu: Allow NULL @vcpu in kvm_mmu_find_shadow_page()
KVM: x86/mmu: Pass const memslot to rmap_add()
KVM: x86/mmu: Decouple rmap_add() and link_shadow_page() from kvm_vcpu
KVM: x86/mmu: Update page stats in __rmap_add()
KVM: x86/mmu: Cache the access bits of shadowed translations
KVM: x86/mmu: Extend make_huge_page_split_spte() for the shadow MMU
KVM: x86/mmu: Zap collapsible SPTEs in shadow MMU at all possible
levels
KVM: Allow for different capacities in kvm_mmu_memory_cache structs
KVM: x86/mmu: Extend Eager Page Splitting to nested MMUs

Paolo Bonzini (2):
KVM: x86/mmu: pull call to drop_large_spte() into __link_shadow_page()
KVM: x86/mmu: Avoid unnecessary flush on eager page split

.../admin-guide/kernel-parameters.txt | 3 +-
arch/arm64/kvm/mmu.c | 2 +-
arch/riscv/kvm/mmu.c | 5 +-
arch/x86/include/asm/kvm_host.h | 24 +-
arch/x86/kvm/mmu/mmu.c | 719 ++++++++++++++----
arch/x86/kvm/mmu/mmu_internal.h | 17 +-
arch/x86/kvm/mmu/paging_tmpl.h | 43 +-
arch/x86/kvm/mmu/spte.c | 15 +-
arch/x86/kvm/mmu/spte.h | 4 +-
arch/x86/kvm/mmu/tdp_mmu.c | 2 +-
include/linux/kvm_host.h | 1 +
include/linux/kvm_types.h | 6 +-
virt/kvm/kvm_main.c | 33 +-
13 files changed, 666 insertions(+), 208 deletions(-)

--
2.31.1

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