| From: |
| Sean Christopherson <seanjc-AT-google.com> |
| To: |
| Marc Zyngier <maz-AT-kernel.org>, Oliver Upton <oliver.upton-AT-linux.dev> |
| Subject: |
| [RFC PATCH 00/16] KVM: arm64: Add "struct kvm_page_fault" |
| Date: |
| Thu, 21 Aug 2025 14:00:26 -0700 |
| Message-ID: |
| <20250821210042.3451147-1-seanjc@google.com> |
| Cc: |
| linux-arm-kernel-AT-lists.infradead.org, kvmarm-AT-lists.linux.dev, linux-kernel-AT-vger.kernel.org, Sean Christopherson <seanjc-AT-google.com>, James Houghton <jthoughton-AT-google.com> |
| Archive-link: |
| Article |
Add an arm64 version of "struct kvm_page_fault" to (hopefully) tidy up
the abort path, and to pave the way for things like KVM Userfault[*] that
want to consume kvm_page_fault in arch-neutral code.
This is essentially one giant nop of code shuffling.
RFC as this is only compile-tested. I didn't want to spend time testing
until I got feedback on whether or not y'all are amenable to the general idea.
[*] https://lore.kernel.org/all/20250618042424.330664-1-jthou...
Sean Christopherson (16):
KVM: arm64: Drop nested "esr" to eliminate variable shadowing
KVM: arm64: Get iabt status on-demand
KVM: arm64: Move SRCU-protected region of kvm_handle_guest_abort() to
helper
KVM: arm64: Use guard(srcu) in kvm_handle_guest_abort()
KVM: arm64: Introduce "struct kvm_page_fault" for tracking abort state
KVM: arm64: Pass kvm_page_fault pointer to
transparent_hugepage_adjust()
KVM: arm64: Pass @fault to fault_supports_stage2_huge_mapping()
KVM: arm64: Add helper to get permission fault granule from ESR
KVM: arm64: Track perm fault granule in "struct kvm_page_fault"
KVM: arm64: Drop local vfio_allow_any_uc, use vm_flags snapshot
KVM: arm64: Drop local mte_allowed, use vm_flags snapshot
KVM: arm64: Move VMA-related information into "struct kvm_page_fault"
KVM: arm64: Stash "mmu_seq" in "struct kvm_page_fault"
KVM: arm64: Track "forced" information in "struct kvm_page_fault"
KVM: arm64: Extract mmap_lock-protected code to helper for user mem
aborts
KVM: arm64: Don't bother nullifying "vma" in mem abort path
arch/arm64/include/asm/esr.h | 6 +
arch/arm64/include/asm/kvm_emulate.h | 9 -
arch/arm64/include/asm/kvm_host.h | 32 ++
arch/arm64/kvm/mmu.c | 514 +++++++++++++--------------
4 files changed, 282 insertions(+), 279 deletions(-)
base-commit: 8f5ae30d69d7543eee0d70083daf4de8fe15d585
--
2.51.0.261.g7ce5a0a67e-goog
