From: Steven Price <steven.price@arm.com>
To: kvm@vger.kernel.org, kvmarm@lists.linux.dev
Cc: Steven Price <steven.price@arm.com>,
Catalin Marinas <catalin.marinas@arm.com>,
Marc Zyngier <maz@kernel.org>, Will Deacon <will@kernel.org>,
James Morse <james.morse@arm.com>,
Oliver Upton <oliver.upton@linux.dev>,
Suzuki K Poulose <suzuki.poulose@arm.com>,
Zenghui Yu <yuzenghui@huawei.com>,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, Joey Gouly <joey.gouly@arm.com>,
Alexandru Elisei <alexandru.elisei@arm.com>,
Christoffer Dall <christoffer.dall@arm.com>,
Fuad Tabba <tabba@google.com>,
linux-coco@lists.linux.dev,
Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>,
Gavin Shan <gshan@redhat.com>,
Shanker Donthineni <sdonthineni@nvidia.com>,
Alper Gun <alpergun@google.com>,
"Aneesh Kumar K . V" <aneesh.kumar@kernel.org>,
Emi Kisanuki <fj0570is@fujitsu.com>,
Vishal Annapurve <vannapurve@google.com>,
WeiLin.Chang@arm.com, Lorenzo Pieralisi <lpieralisi@kernel.org>
Subject: [PATCH 00/11] KVM: arm64: CCA: Prepare Realm memory management
Date: Mon, 2 Nov 2026 14:12:51 +0000 [thread overview]
Message-ID: <20261102141304.126883-1-steven.price@arm.com> (raw)
This series adds the memory plumbing for CCA building on the basic
plumbing[1] that has just been merged.
These patches add the internal realm VM state and RMM feature checks,
prepare realm stage-2 setup and teardown, and provide RTT mapping and
invalidation helpers. Realm memslots are now contrained to the lower
half of the IPA space, because faults treat the protected and shared
halves as aliasing. The final patch then connects these helpers to the
KVM stage-2 MMU operations.
There's also an integration branch[2] that builds on this series and
includes the realm descriptor creation, REC entry/exit, activation and
the new uAPI. This series by itself is also available as a git
branch[3]. However the new code isn't generally active without the full
integration branch.
[1] https://lore.kernel.org/all/20261007073537.2454351-1-suzuki.poulose@arm.com/
[2] https://gitlab.arm.com/linux-arm/linux-cca
branch: cca-host-mm/v1/integration
[3] https://gitlab.arm.com/linux-arm/linux-cca
branch: cca-host-mm/v1/mm
Steven Price (7):
KVM: arm64: CCA: Reserve the RMM mode
KVM: arm64: CCA: Check for RMI support at KVM init
KVM: arm64: CCA: Check for LPA2 support and SHA-256
KVM: arm64: CCA: Add basic infrastructure for creating a realm
KVM: arm64: CCA: Tear down RTTs
KVM: arm64: CCA: Add Realm RTT mapping and invalidation helpers
KVM: arm64: CCA: Support runtime faulting of memory
Suzuki K Poulose (4):
KVM: arm64: CCA: Introduce Realms
KVM: arm64: Handle attributes in stage2_unmap_range
KVM: arm64: CCA: Prevent memslot modifications after Realm creation
KVM: arm64: CCA: Add Realm stage-2 MMU operations
arch/arm64/include/asm/kvm_emulate.h | 29 +
arch/arm64/include/asm/kvm_host.h | 62 +-
arch/arm64/include/asm/kvm_rmi.h | 109 ++++
arch/arm64/include/asm/virt.h | 1 +
arch/arm64/kvm/Kconfig | 1 +
arch/arm64/kvm/Makefile | 2 +-
arch/arm64/kvm/arm.c | 33 +-
arch/arm64/kvm/hyp/include/nvhe/pkvm.h | 2 +-
arch/arm64/kvm/hyp/nvhe/switch.c | 4 +-
arch/arm64/kvm/hyp/nvhe/timer-sr.c | 2 +-
arch/arm64/kvm/mmu.c | 242 +++++--
arch/arm64/kvm/rmi.c | 852 +++++++++++++++++++++++++
12 files changed, 1275 insertions(+), 64 deletions(-)
create mode 100644 arch/arm64/include/asm/kvm_rmi.h
create mode 100644 arch/arm64/kvm/rmi.c
--
2.43.0
next reply other threads:[~2026-11-02 14:13 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-02 14:12 Steven Price [this message]
2026-11-02 14:12 ` [PATCH 01/11] KVM: arm64: CCA: Reserve the RMM mode Steven Price
2026-11-02 14:12 ` [PATCH 02/11] KVM: arm64: CCA: Introduce Realms Steven Price
2026-11-02 14:12 ` [PATCH 03/11] KVM: arm64: CCA: Check for RMI support at KVM init Steven Price
2026-11-02 14:12 ` [PATCH 04/11] KVM: arm64: CCA: Check for LPA2 support and SHA-256 Steven Price
2026-11-02 14:12 ` [PATCH 05/11] KVM: arm64: Handle attributes in stage2_unmap_range Steven Price
2026-11-02 14:12 ` [PATCH 06/11] KVM: arm64: CCA: Add basic infrastructure for creating a realm Steven Price
2026-11-02 14:12 ` [PATCH 07/11] KVM: arm64: CCA: Tear down RTTs Steven Price
2026-11-02 14:12 ` [PATCH 08/11] KVM: arm64: CCA: Add Realm RTT mapping and invalidation helpers Steven Price
2026-11-02 14:13 ` [PATCH 09/11] KVM: arm64: CCA: Prevent memslot modifications after Realm creation Steven Price
2026-11-02 14:13 ` [PATCH 10/11] KVM: arm64: CCA: Support runtime faulting of memory Steven Price
2026-11-02 14:13 ` [PATCH 11/11] KVM: arm64: CCA: Add Realm stage-2 MMU operations Steven Price
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