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 1BD66FED2E4 for ; Thu, 12 Mar 2026 08:04:58 +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: Content-Type:MIME-Version:Message-ID:Date:Subject:Cc:To:From:Reply-To: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References:List-Owner; bh=2mn7IgWsrfE9TYXsKilOXAPBXrLjNm9hA0Gndw7j65w=; b=YBYzX4ISaHsADGSdA7Pq56y4kK v8XIOw3zR4hnoQDnZw/V8Y4dFkx67ghJNLXH3weCmfzdUD6UPrh7ViW8pkgcvZVMFrkh9XZ9Uc+1M jKls9wfbbN1+HbVkWae3VQSCNzvst3OPpsduWc68H34gaSqLUba4XgrhkUYIh4bpTcffxg9rO1EIm kcmy3pglzpDzqmmQ6+Wq383cjmY+NOWZKnrfagFjmRSKKK3mV9DKjAcWM1NN8WMv7ppVWjULJRAlG pAWfLX7xKnidJ+JF9QJP4GLMJQkVlxF/921QZXRp0lZlRYWzY8w/ukZ+zmNXz/scmv8lv8v1KWsB3 RkAWBXDA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1w0b2M-0000000DaHl-3sGG; Thu, 12 Mar 2026 08:04:54 +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 1w0b2M-0000000DaHU-0XC8 for linux-arm-kernel@lists.infradead.org; Thu, 12 Mar 2026 08:04:54 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 8C48160131 for ; Thu, 12 Mar 2026 08:04:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E2303C116C6; Thu, 12 Mar 2026 08:04:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1773302693; bh=6ydSDQG+BzDQfX2QG0Xe/FoeSH8DDVA5roiPKs+8xEg=; h=From:To:Cc:Subject:Date:From; b=mrgTEKG4tbvp0+NYtBCc2J0fDgMyYIOugAJvEjH2E5Ykkd5RG2iNdUvcKmf0aQv9d loZTHceUFNCZjLUWF7xQ3qNKefejCugbkb9Qcx6FZSbAx4x0X7qVXkUcJmaZwUKSUd 7oNMXi5+A9t5mvqGyh3wPB8qGvJtjPF/+DNkSWahasUmpsSK8eQGEc4sAmWkKaXNpJ gAAtGHi36KmOiah/5q30fCwEsuuURihPHTRE/Y1AYjxCwTiQO08YQUvIidDGnMb0AO T/kXnJuVZ+kSuKzb6DKcIBNXqYaOcJXfBjmqsJUUx3hymA3L+XSYAPCz4ZQJLYYJ3Q 8kP5xpdApk5XA== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, "Aneesh Kumar K.V (Arm)" Subject: [RFC PATCH v3 00/11] coco/TSM: Arm CCA guest TDISP lock/accept flow with verification and DMA enable Date: Thu, 12 Mar 2026 13:34:31 +0530 Message-ID: <20260312080442.3485633-1-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 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 This patch series implements the TSM ->lock(), ->unlock(), and ->accept() callbacks required for the TDISP setup with Arm CCA as per the RMM ALP17 specification [1]. The series adds the guest-side DA plumbing needed to transition a device through TDI LOCK and RUN states, verify host-provided evidence against RMM-provided digests, validate interface-report MMIO mappings, and enable DMA only after attestation succeeds. At a high level, the series includes: - guest TSM callback registration and lock/unlock/accept hooks - RHI DA helper support for TDI state transitions and object refresh - host-cached DA object fetch APIs in guest - RSI_VDEV_GET_INFO digest verification of certificate/VCA/report/measurement - mapping validation for interface-report ranges and teardown on unlock - DMA behavior updates for accepted devices (including swiotlb restrictions) - vdev DMA enable after successful attestation The series builds upon the TSM framework patches posted at [2]. A git repository containing all the related changes is available at [3]. Testing / Usage echo ${DEVICE} > /sys/bus/pci/devices/${DEVICE}/driver/unbind To transition the device to TDISP LOCK state: echo tsm0 > /sys/bus/pci/devices/${DEVICE}/tsm/lock To transition the device to TDISP RUN state: echo 1 > /sys/bus/pci/devices/${DEVICE}/tsm/accept echo ${DEVICE} > /sys/bus/pci/drivers_probe Previous posting: rfc-v1: https://lore.kernel.org/all/20250728135216.48084-1-aneesh.kumar@kernel.org rfc-v2: https://lore.kernel.org/all/20251117140007.122062-1-aneesh.kumar@kernel.org Changes from v2: * rebase to latest kernel and core TSM changes * Address review feedback. * Interface report is now collected using core TSM framework * swiotlb is now considered shared-memory pool and is not allowed to be used by accepted devices. [1] https://developer.arm.com/-/cdn-downloads/permalink/Architectures/Armv9/DEN0137_1.1-alp17.zip [2] https://lore.kernel.org/all/20260303000207.1836586-1-dan.j.williams@intel.com [3] https://gitlab.arm.com/linux-arm/linux-cca.git cca/topics/cca-tdisp-upstream-rfc-v3 Aneesh Kumar K.V (Arm) (11): coco: guest: arm64: Guest TSM callback and realm device lock support coco: guest: arm64: Fix a typo in the ARM_CCA_GUEST Kconfig help string ("and" -> "an"). coco: guest: arm64: Add Realm Host Interface and guest DA helper coco: guest: arm64: Support guest-initiated TDI lock/unlock transitions coco: guest: arm64: Refresh interface-report cache during device lock coco: guest: arm64: Add measurement refresh via RHI_DA_VDEV_GET_MEASUREMENTS coco: guest: arm64: Add guest APIs to read host-cached DA objects coco: guest: arm64: Verify DA evidence with RSI_VDEV_GET_INFO digests coco: guest: arm64: Hook TSM accept to Realm TDISP RUN transition coco: arm64: dma: Update force_dma_unencrypted for accepted devices coco: guest: arm64: Enable vdev DMA after attestation arch/arm64/include/asm/mem_encrypt.h | 6 +- arch/arm64/include/asm/rhi.h | 58 ++++ arch/arm64/include/asm/rsi.h | 1 + arch/arm64/include/asm/rsi_cmds.h | 73 +++++ arch/arm64/include/asm/rsi_smc.h | 51 +++ arch/arm64/kernel/rsi.c | 10 + arch/arm64/mm/mem_encrypt.c | 10 + drivers/virt/coco/Makefile | 2 +- drivers/virt/coco/arm-cca-guest/Kconfig | 9 +- drivers/virt/coco/arm-cca-guest/Makefile | 1 + drivers/virt/coco/arm-cca-guest/arm-cca.c | 358 +++++++++++++++++++++- drivers/virt/coco/arm-cca-guest/rhi-da.c | 345 +++++++++++++++++++++ drivers/virt/coco/arm-cca-guest/rhi-da.h | 17 + drivers/virt/coco/arm-cca-guest/rsi-da.c | 289 +++++++++++++++++ drivers/virt/coco/arm-cca-guest/rsi-da.h | 65 ++++ include/linux/swiotlb.h | 3 + kernel/dma/direct.c | 8 + kernel/dma/swiotlb.c | 3 + 18 files changed, 1301 insertions(+), 8 deletions(-) create mode 100644 drivers/virt/coco/arm-cca-guest/rhi-da.c create mode 100644 drivers/virt/coco/arm-cca-guest/rhi-da.h create mode 100644 drivers/virt/coco/arm-cca-guest/rsi-da.c create mode 100644 drivers/virt/coco/arm-cca-guest/rsi-da.h -- 2.43.0