[PATCH 0/9] Stage-2 huge mappings for pKVM np-guests

Vincent Donnefort
2025-02-28T10:25:45Z

Hi all,

This series adds support for stage-2 huge mappings (PMD_SIZE) to pKVM
np-guests, that is installing PMD-level mappings in the stage-2,
whenever the stage-1 is backed by either Hugetlbfs or THPs.

The last patch of that series is an optimization for CMOs using a shared
PMD_SIZE fixmap.

--
Vincent

Quentin Perret (2):
KVM: arm64: Convert pkvm_mappings to interval tree
KVM: arm64: Add a range to pkvm_mappings

Vincent Donnefort (7):
KVM: arm64: Handle huge mappings for np-guest CMOs
KVM: arm64: Add a range to __pkvm_host_share_guest()
KVM: arm64: Add a range to __pkvm_host_unshare_guest()
KVM: arm64: Add a range to __pkvm_host_wrprotect_guest()
KVM: arm64: Add a range to __pkvm_host_test_clear_young_guest()
KVM: arm64: Stage-2 huge mappings for np-guests
KVM: arm64: np-guest CMOs with PMD_SIZE fixmap

arch/arm64/include/asm/kvm_pgtable.h | 7 +-
arch/arm64/include/asm/kvm_pkvm.h | 2 +
arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 8 +-
arch/arm64/kvm/hyp/include/nvhe/mm.h | 4 +-
arch/arm64/kvm/hyp/nvhe/hyp-main.c | 16 +-
arch/arm64/kvm/hyp/nvhe/mem_protect.c | 218 +++++++++++++-----
arch/arm64/kvm/hyp/nvhe/mm.c | 86 ++++++-
arch/arm64/kvm/hyp/nvhe/setup.c | 2 +-
arch/arm64/kvm/hyp/pgtable.c | 6 -
arch/arm64/kvm/mmu.c | 5 +-
arch/arm64/kvm/pkvm.c | 129 +++++------
11 files changed, 326 insertions(+), 157 deletions(-)

base-commit: d082ecbc71e9e0bf49883ee4afd435a77a5101b6