[PATCH 00/10 V2] KVM: x86: MMU: Clean up x86's mmu code for future work

From: Takuya Yoshikawa
Date: Thu Nov 12 2015 - 06:35:55 EST

Patch 5 and 7 are added based on Paolo's suggestions.
Patch 8-10 are new.

Patch 1/2/3/4: no change.
Patch 5: Needed a bit more work than I had expected.
Patch 6: Removed extra comment of v1 (patch 5 made it inappropriate).
Patch 7: As expected, many places needed to be converted.
Patch 8: This is new, but only a small change.

Patch 9: Kind of an RFC (though I have checked it to some extent).
Following two places need to be carefully checked:
- in kvm_mmu_get_page: "if (!direct)" block after kvm_mmu_alloc_page()
- in FNAME(fetch): "if (FNAME(gpte_changed)(vcpu, gw, it.level - 1))" case
Patch 10: Trivial cleanup, assuming that patch 9 is correct.

In summary: patch 1-7 is the result of updating v1 based on the suggestions.
Although patch 5 does not look so nice than expected, this is the most
conservative approach, and patch 8-10 try to alleviate the sadness.


Takuya Yoshikawa (10):
01: KVM: x86: MMU: Remove unused parameter of __direct_map()
02: KVM: x86: MMU: Add helper function to clear a bit in unsync child bitmap
03: KVM: x86: MMU: Make mmu_set_spte() return emulate value
04: KVM: x86: MMU: Remove is_rmap_spte() and use is_shadow_present_pte()
05: KVM: x86: MMU: Use for_each_rmap_spte macro instead of pte_list_walk()
06: KVM: x86: MMU: Consolidate WARN_ON/BUG_ON checks for reverse-mapped sptes
07: KVM: x86: MMU: Encapsulate the type of rmap-chain head in a new struct
08: KVM: x86: MMU: Move initialization of parent_ptes out from kvm_mmu_alloc_page()
09: KVM: x86: MMU: Move parent_pte handling from kvm_mmu_get_page() to link_shadow_page()
10: KVM: x86: MMU: Remove unused parameter parent_pte from kvm_mmu_get_page()

Documentation/virtual/kvm/mmu.txt | 4 +-
arch/x86/include/asm/kvm_host.h | 8 +-
arch/x86/kvm/mmu.c | 357 ++++++++++++++++++--------------------
arch/x86/kvm/mmu_audit.c | 15 +-
arch/x86/kvm/paging_tmpl.h | 20 +--
5 files changed, 196 insertions(+), 208 deletions(-)


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