From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 38612F33A77 for ; Thu, 5 Mar 2026 14:44:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-Type: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=oSG6Vx2Sitkf1i6II+qQ5RGJctW3Z+6tS0l0xSzd9tE=; b=hgQDM3Lyssnkp556+agUzabZkB 5YjeCfI8t9E8EX1mXin1m3aJ6C1YOonrLMiVippzwaDxIuPieRGqFSg27M0cWnpuBjNPIi/9ya17t nNm59f8jepgbxb2JJDhEqXxB2cQIPpBwjgl5PqTNoOQ8fGf441sina9etlfNq/tvCMagr8/svHVYU pvuOhhbHShoQ5XKCTF0HPLZIsjPaaScr7FnNCcgd6MUG8z2oINgBdjmHR8Zd19KaQZdBW+PfMPjAx qRarmHwoTjDZdBI8o3s7TRFoeWcd+oDP5XG4IDrI/J+GReMYSjcIi7Y8ckcuCJrTB8posRZl2PiBp DV9J+teQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vy9vx-000000020zg-3DdJ; Thu, 05 Mar 2026 14:44:13 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vy9vw-000000020zV-0xUS for linux-arm-kernel@lists.infradead.org; Thu, 05 Mar 2026 14:44:12 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 6512D61344; Thu, 5 Mar 2026 14:44:11 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 2C4F0C116C6; Thu, 5 Mar 2026 14:44:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772721851; bh=zj5O77Zgn/c++dmVJ4vIAhB3cuZM1BJ9GuJz7VIPinM=; h=From:To:Cc:Subject:Date:From; b=QTucp+7piv3l0dwxPWM4SKEldRXopu+sXLDNT9L/JLB4wdYvYrUO0bOfVUA+83Ut6 3hPTdeKuvn3rQNwe9xiQyH7b5USGa7OoEJ7l+2+LDM7CIRxhKHEaDlC30ynAxTdXu9 odAEda4jWGPgG7QyxAgoNGKJ85VA6Dl2TZuAEKfDvDqL8cDbvwCEUDg+/Bb+eAnE7n 7d4twdBqHRX1TWs1iYY2Gth55FxJwxdd00Xk/Oi0y79MH8Gw2AoVIEnGIJeshZDjBz 2J7wduTX8rIxz6/PJMBF5OY5gMdvwiuDcKm0BcqQnM69JHT0lDp1CIlvoO7P1QZyXX rzdZm1aXffRxg== 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 v3 00/36] KVM: arm64: Add support for protected guest memory with pKVM Date: Thu, 5 Mar 2026 14:43:13 +0000 Message-ID: <20260305144351.17071-1-will@kernel.org> X-Mailer: git-send-email 2.47.3 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Hi everyone, Here's v3 of the 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/ Changes since v2 include: * Rebased onto v7.0-rc2 * Rework of the way that exceptions are injected into the host, building on top of Fuad's work that landed in the recent merge window. * Some renaming and comment additions. 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 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 (34): 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 .../admin-guide/kernel-parameters.txt | 4 +- Documentation/virt/kvm/arm/index.rst | 1 + Documentation/virt/kvm/arm/pkvm.rst | 103 +++ 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/Kconfig | 10 + arch/arm64/kvm/arm.c | 12 +- arch/arm64/kvm/hyp/include/nvhe/mem_protect.h | 9 + 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 | 154 ++++- arch/arm64/mm/fault.c | 33 +- include/uapi/linux/kvm.h | 5 + 24 files changed, 1374 insertions(+), 225 deletions(-) create mode 100644 Documentation/virt/kvm/arm/pkvm.rst -- 2.53.0.473.g4a7958ca14-goog