From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 6B0D7221264 for ; Fri, 27 Mar 2026 14:00:51 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774620051; cv=none; b=KvZHT7/ATpB7EBTixaZOieI3/xLbxkBk/IfE/TXxaipBBZMIzo899OeAPWrI/1Gbd5LcW0lsjp9leniHsNFgnYZuq9AwGSrY0dj9UC5CWEyUfboq2N2L4w2Nw6iVmmDB3LAbXMXw6mOFzQqINE028GcqsG1fcTxzib0A3ERb6WM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774620051; c=relaxed/simple; bh=WJqQ6Hp9KT0S4VoqMoBe+8IACBv7zyhfQsqMY1Rywe8=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=byJOliMPcwTt2oOHPUiYN5pX3bqP44F9VKRY4KMk1tI580oHUOraxHLT9JKQ8Ibz4zuJ3EnS6xzGAqkCuUrrtXrYgqmi1cPlFYKIA3sgOFEkfyL2aODoz61epQMUFIjkVoKnjLEQ1x3QCtWMekwlCQWkbSglV69oVj+/IeIwnvk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=aGetUFSQ; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="aGetUFSQ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5745FC19423; Fri, 27 Mar 2026 14:00:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1774620051; bh=WJqQ6Hp9KT0S4VoqMoBe+8IACBv7zyhfQsqMY1Rywe8=; h=From:To:Cc:Subject:Date:From; b=aGetUFSQJePsOgz3Fiw3EVnaSyITy7ZU+pfSCvghGCJEUdIDpcj0nBRWIR6FuyV+x fKx+sLJh152XL/so++RvGQmrMblQmBbl/FO4fZ4GUbDcsMgvkGDNl4VHTHoGuzn71I shJW7ETohH6qoRAICiZV5HHoiqWEfaBoSbwvdkaAoJChzUt0l7uMpxmz5ygcwse3nA RAxLt6n3QaNt/VUCdj/7DPPH+/POTgDNoJhPcYbcDozb+D44IdoVUXPWNxOpxbpDz/ +4yP2/JTYnnFzmFWIwNkK1d6Qqqrmhe/cUxnE96zjKYxKDl78iWK6VohOYGwi0oEra 7SfD002AxidxQ== From: Will Deacon To: kvmarm@lists.linux.dev Cc: linux-arm-kernel@lists.infradead.org, Will Deacon , Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Quentin Perret , Fuad Tabba , Vincent Donnefort , Mostafa Saleh , Alexandru Elisei Subject: [PATCH v4 00/38] KVM: arm64: Add support for protected guest memory with pKVM Date: Fri, 27 Mar 2026 13:59:59 +0000 Message-ID: <20260327140039.21228-1-will@kernel.org> X-Mailer: git-send-email 2.47.3 Precedence: bulk X-Mailing-List: kvmarm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Hi again, folks, Here's v4 of the pKVM protected memory patches previously posted here: v1: https://lore.kernel.org/kvmarm/20260105154939.11041-1-will@kernel.org/ v2: https://lore.kernel.org/kvmarm/20260119124629.2563-1-will@kernel.org/ v3: https://lore.kernel.org/r/20260305144351.17071-1-will@kernel.org Changes since v3 include: * Rebased onto v7.0-rc4 * Remove unused PKVM_ID_FFA * Make ARM_PKVM_GUEST depend on DMA_RESTRICTED_POOL * Use FAR_TO_FIPA_OFFSET() instead of open-coding it * Remove PROTECTED_VM_UAPI config option and update documentation As before, I've pushed an updated branch with this series: https://git.kernel.org/pub/scm/linux/kernel/git/will/linux.git/log/?h=kvm/protected-memory and the kvmtool patches are available at: https://git.kernel.org/pub/scm/linux/kernel/git/will/kvmtool.git/log/?h=pkvm I fully expect to send a v5, as this is the first time Sashiko has had a chance to chew on this and I'm expecting a roasting. Cheers, Will Cc: Marc Zyngier Cc: Oliver Upton Cc: Joey Gouly Cc: Suzuki K Poulose Cc: Zenghui Yu Cc: Catalin Marinas Cc: Quentin Perret Cc: Fuad Tabba Cc: Vincent Donnefort Cc: Mostafa Saleh Cc: Alexandru Elisei --->8 Fuad Tabba (1): KVM: arm64: Expose self-hosted debug regs as RAZ/WI for protected guests Quentin Perret (1): KVM: arm64: Inject SIGSEGV on illegal accesses Will Deacon (36): KVM: arm64: Remove unused PKVM_ID_FFA definition KVM: arm64: Don't leak stage-2 page-table if VM fails to init under pKVM KVM: arm64: Move handle check into pkvm_pgtable_stage2_destroy_range() KVM: arm64: Rename __pkvm_pgtable_stage2_unmap() KVM: arm64: Don't advertise unsupported features for protected guests KVM: arm64: Remove is_protected_kvm_enabled() checks from hypercalls KVM: arm64: Ignore MMU notifier callbacks for protected VMs KVM: arm64: Prevent unsupported memslot operations on protected VMs KVM: arm64: Ignore -EAGAIN when mapping in pages for the pKVM host KVM: arm64: Split teardown hypercall into two phases KVM: arm64: Introduce __pkvm_host_donate_guest() KVM: arm64: Hook up donation hypercall to pkvm_pgtable_stage2_map() KVM: arm64: Handle aborts from protected VMs KVM: arm64: Introduce __pkvm_reclaim_dying_guest_page() KVM: arm64: Hook up reclaim hypercall to pkvm_pgtable_stage2_destroy() KVM: arm64: Factor out pKVM host exception injection logic KVM: arm64: Support translation faults in inject_host_exception() KVM: arm64: Avoid pointless annotation when mapping host-owned pages KVM: arm64: Generalise kvm_pgtable_stage2_set_owner() KVM: arm64: Introduce host_stage2_set_owner_metadata_locked() KVM: arm64: Change 'pkvm_handle_t' to u16 KVM: arm64: Annotate guest donations with handle and gfn in host stage-2 KVM: arm64: Introduce hypercall to force reclaim of a protected page KVM: arm64: Reclaim faulting page from pKVM in spurious fault handler KVM: arm64: Return -EFAULT from VCPU_RUN on access to a poisoned pte KVM: arm64: Add hvc handler at EL2 for hypercalls from protected VMs KVM: arm64: Implement the MEM_SHARE hypercall for protected VMs KVM: arm64: Implement the MEM_UNSHARE hypercall for protected VMs KVM: arm64: Allow userspace to create protected VMs when pKVM is enabled KVM: arm64: Add some initial documentation for pKVM KVM: arm64: Extend pKVM page ownership selftests to cover guest donation KVM: arm64: Register 'selftest_vm' in the VM table KVM: arm64: Extend pKVM page ownership selftests to cover forced reclaim KVM: arm64: Extend pKVM page ownership selftests to cover guest hvcs KVM: arm64: Rename PKVM_PAGE_STATE_MASK drivers/virt: pkvm: Add Kconfig dependency on DMA_RESTRICTED_POOL .../admin-guide/kernel-parameters.txt | 4 +- Documentation/virt/kvm/arm/index.rst | 1 + Documentation/virt/kvm/arm/pkvm.rst | 106 ++++ arch/arm64/include/asm/kvm_asm.h | 31 +- arch/arm64/include/asm/kvm_host.h | 9 +- arch/arm64/include/asm/kvm_pgtable.h | 45 +- arch/arm64/include/asm/kvm_pkvm.h | 4 +- arch/arm64/include/asm/virt.h | 9 + arch/arm64/kvm/arm.c | 12 +- arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 10 +- arch/arm64/kvm/hyp/include/nvhe/memory.h | 12 +- arch/arm64/kvm/hyp/include/nvhe/pkvm.h | 7 +- .../arm64/kvm/hyp/include/nvhe/trap_handler.h | 2 + arch/arm64/kvm/hyp/nvhe/hyp-main.c | 184 +++--- arch/arm64/kvm/hyp/nvhe/mem_protect.c | 585 ++++++++++++++++-- arch/arm64/kvm/hyp/nvhe/pkvm.c | 224 ++++++- arch/arm64/kvm/hyp/nvhe/switch.c | 1 + arch/arm64/kvm/hyp/nvhe/sys_regs.c | 8 + arch/arm64/kvm/hyp/pgtable.c | 33 +- arch/arm64/kvm/mmu.c | 114 +++- arch/arm64/kvm/pkvm.c | 151 ++++- arch/arm64/mm/fault.c | 33 +- drivers/virt/coco/pkvm-guest/Kconfig | 2 +- include/uapi/linux/kvm.h | 5 + 24 files changed, 1365 insertions(+), 227 deletions(-) create mode 100644 Documentation/virt/kvm/arm/pkvm.rst -- 2.53.0.1018.g2bb0e51243-goog