[PATCH v4 00/21] KVM: arm64: Rewrite page-table code and fault handling

[Will Deacon <will@kernel.org>]

Hi all,

Here's version four of the KVM page-table rework I previously posted here:

  v1: https://lore.kernel.org/r/20200730153406.25136-1-will@kernel.org
  v2: https://lore.kernel.org/r/20200818132818.16065-1-will@kernel.org
  v3: https://lore.kernel.org/r/20200825093953.26493-1-will@kernel.org

Changes since v3 include:

  * Removed some more unused code from the old implementation
  * Renumbered KVM_PGTABLE_PROT_* to match file permissions in hex dumps
  * Simplified kvm_granule_shift() and removed kvm_start_level()
  * Only clear valid bit when invalidating a PTE, leaving phys addr intact
  * Fail gracefully when attempting to allocate without a memory cache
  * Rewrote stage2_apply_range() as a function instead of a macro
  * Fixed fault address rounding with hugetlbfs
  * Fixed permission fault handling when dirty logging is enabled
  * Added comments
  * Added reviewer tags

Many thanks to Alex and Gavin for their comments.

Will

Cc: Marc Zyngier <maz@kernel.org>
Cc: Quentin Perret <qperret@google.com>
Cc: James Morse <james.morse@arm.com>
Cc: Suzuki Poulose <suzuki.poulose@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Gavin Shan <gshan@redhat.com>
Cc: Alexandru Elisei <alexandru.elisei@arm.com>
Cc: kernel-team@android.com
Cc: linux-arm-kernel@lists.infradead.org

--->8

Quentin Perret (4):
  KVM: arm64: Add support for stage-2 write-protect in generic
    page-table
  KVM: arm64: Convert write-protect operation to generic page-table API
  KVM: arm64: Add support for stage-2 cache flushing in generic
    page-table
  KVM: arm64: Convert memslot cache-flushing code to generic page-table
    API

Will Deacon (17):
  KVM: arm64: Remove kvm_mmu_free_memory_caches()
  KVM: arm64: Add stand-alone page-table walker infrastructure
  KVM: arm64: Add support for creating kernel-agnostic stage-1 page
    tables
  KVM: arm64: Use generic allocator for hyp stage-1 page-tables
  KVM: arm64: Add support for creating kernel-agnostic stage-2 page
    tables
  KVM: arm64: Add support for stage-2 map()/unmap() in generic
    page-table
  KVM: arm64: Convert kvm_phys_addr_ioremap() to generic page-table API
  KVM: arm64: Convert kvm_set_spte_hva() to generic page-table API
  KVM: arm64: Convert unmap_stage2_range() to generic page-table API
  KVM: arm64: Add support for stage-2 page-aging in generic page-table
  KVM: arm64: Convert page-aging and access faults to generic page-table
    API
  KVM: arm64: Add support for relaxing stage-2 perms in generic
    page-table code
  KVM: arm64: Convert user_mem_abort() to generic page-table API
  KVM: arm64: Check the pgt instead of the pgd when modifying page-table
  KVM: arm64: Remove unused page-table code
  KVM: arm64: Remove unused 'pgd' field from 'struct kvm_s2_mmu'
  KVM: arm64: Don't constrain maximum IPA size based on host
    configuration

 arch/arm64/include/asm/kvm_host.h       |    2 +-
 arch/arm64/include/asm/kvm_mmu.h        |  251 +---
 arch/arm64/include/asm/kvm_pgtable.h    |  281 ++++
 arch/arm64/include/asm/pgtable-hwdef.h  |   23 -
 arch/arm64/include/asm/pgtable-prot.h   |   19 -
 arch/arm64/include/asm/stage2_pgtable.h |  215 ---
 arch/arm64/kvm/arm.c                    |    2 +-
 arch/arm64/kvm/hyp/Makefile             |    2 +-
 arch/arm64/kvm/hyp/pgtable.c            |  880 ++++++++++++
 arch/arm64/kvm/mmu.c                    | 1745 ++++-------------------
 arch/arm64/kvm/reset.c                  |   38 +-
 11 files changed, 1444 insertions(+), 2014 deletions(-)
 create mode 100644 arch/arm64/include/asm/kvm_pgtable.h
 create mode 100644 arch/arm64/kvm/hyp/pgtable.c

-- 
2.28.0.526.ge36021eeef-goog

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