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 678453A6B6B; Mon, 27 Apr 2026 08:53:57 +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=1777280037; cv=none; b=lPsIHGDcXRMNCyR8lj8nj+f+0mlp+UnWcTmhh+Cy9jvovus+Eb2db9HaQjN3tZ1Z3PxnBSGPGw1yGPZM+kHyq1faDG1c4WQVGbQXrdJXJO7bVQum7gT7OU/13LjXGmiYl2iF30+9k9jfjF5y9uYGqPPkLBoJ4V7Mh+a4uc5mA8g= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1777280037; c=relaxed/simple; bh=L6CIRuwpkn6LSm93SMXHwBeF+6YApe7XFCUtPrZkZuo=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version:Content-Type; b=Plx2BrOkmm5fO/X+84N/Ynq1xWK0SgEBKSrUsGf3u170jHLQxVP8Uf/MRluUYNTqFn1U9a7gds1B3OiUvO+z5qlwKa0dft0t+Tksl5r60l/8JQUamrXL3zxu7Q4sULnp1E/PIWRJKg8Gap9+T4/552uem7Sv2r6qMrle2okntYQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=i+EZsHgt; 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="i+EZsHgt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5C051C19425; Mon, 27 Apr 2026 08:53:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1777280037; bh=L6CIRuwpkn6LSm93SMXHwBeF+6YApe7XFCUtPrZkZuo=; h=From:To:Cc:Subject:Date:From; b=i+EZsHgt6NFSuiq0SeFxdz3lOCP6U507jBK+UEGsmhKlSdK+D36m19OUgXs/K50NI bhfadgmo//a/+KeOw6ODbMyNECddyQmu6j8uEUsdH3GeZ0a4oYYcVCTPqJPJoXzZbD N36tv410dRxFDUQGQzjFtIp4iv7zEqEiUU1VwQq390Y+ShVyx1b5WOOoGl4MEMHY7o CzT5QfNaGiQmNauD9G0GWdv29+DtXiohFArCZaT8LqZUuOK4AbY5GbejHOoP/+cxWh jCOXKJXTUKBL/CI7HQ2ztRY5xU2sKi6nt7IaLKIWmzZsyUoXJ1PMR80R6I15UGUVnC bL46puPb99lSw== From: "Aneesh Kumar K.V (Arm)" To: linux-coco@lists.linux.dev, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: "Aneesh Kumar K.V (Arm)" , Alexey Kardashevskiy , Catalin Marinas , Dan Williams , Jason Gunthorpe , Joerg Roedel , Jonathan Cameron , Marc Zyngier , Nicolin Chen , Pranjal Shrivastava , Robin Murphy , Samuel Ortiz , Steven Price , Suzuki K Poulose , Will Deacon , Xu Yilun Subject: [RFC PATCH v4 00/16] coco/TSM: Implement host-side support for Arm CCA TDISP setup Date: Mon, 27 Apr 2026 14:23:28 +0530 Message-ID: <20260427085344.941627-1-aneesh.kumar@kernel.org> X-Mailer: git-send-email 2.43.0 Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit This patch series implements the host-side changes needed for end-to-end Arm CCA TDISP setup. It adds the RMI/RHI plumbing required to create and manage Realm vdev objects, service device-attestation object requests, and complete the KVM/RMM flows needed for device run-time transitions. The series is based on the RMM 2.0bet1 specification [1] and the RHI v1.0 BET1 specification [5]. At a high level, the series adds support for: - host-side vdev communication and lifecycle management - host handling of RHI DA object read/size requests - host-side fetching and caching of interface reports and measurements - KVM handling of vdev request/complete exits - KVM handling of map/validation exits and teardown on granule destroy - vdev transition to TDISP RUN state - enabling DA in Realm create parameters The series builds upon the TSM framework patches posted at [2] and depends on the KVM CCA patchset [3]. A git repository containing all related changes is available at [4]. kvmtool repo is at [6] Previous posting: Changes from v3: https://lore.kernel.org/all/20260312080743.3487326-1-aneesh.kumar@kernel.org * updated the patches to follow the RMM 2.0bet1 specification * moved vdev request-exit handling to the last patch in the series. This is expected to be dropped once the corresponding spec update lands * dropped the vdev and pdev arguments from rmi_rtt_dev_validate(). The spec update for that change is still pending. The validation call is now made from the REC enter path * added a response field to KVM_EXIT_ARM64_TIO so the VMM can pass the ioctl return status back to the exit handler * dropped vcpu_fd from arm64_vdev_device_memmap_guest_req. Once vdev request handling is removed from the series, the ioctl path will no longer need vcpu_fd * reworked the host-side vdev lifecycle to better match the RMM 2.0bet1 flow, * updated the vdev flows to match the revised interfaces: populate MMIO BAR ranges in rmi_vdev_create(), rename the interface-report and measurement update commands, and drop vcpu_fd from the guest MMIO map request path Changes from v1: * rebase to latest kernel and core TSM changes * address review feedback rfc-v1: https://lore.kernel.org/all/20250728135216.48084-1-aneesh.kumar@kernel.org There is no rfc-v2 posting. This series is marked rfc-v3 to stay aligned with the rest of the CCA patchsets that are being posted as v3. [1] https://developer.arm.com/documentation/den0137/2-0bet1/ [2] https://lore.kernel.org/all/20260303000207.1836586-1-dan.j.williams@intel.com [3] https://lore.kernel.org/all/20260318155413.793430-1-steven.price@arm.com [4] https://gitlab.arm.com/linux-arm/linux-cca.git cca/topics/cca-tdisp-upstream-rfc-v4 [5] https://developer.arm.com/documentation/den0148/latest/ [6] https://gitlab.arm.com/linux-arm/kvmtool-cca.git cca/topics/cca-tdisp-upstream-rfc-v4 Cc: Alexey Kardashevskiy Cc: Catalin Marinas Cc: Dan Williams Cc: Jason Gunthorpe Cc: Joerg Roedel Cc: Jonathan Cameron Cc: Marc Zyngier Cc: Nicolin Chen Cc: Pranjal Shrivastava Cc: Robin Murphy Cc: Samuel Ortiz Cc: Steven Price Cc: Suzuki K Poulose Cc: Will Deacon Cc: Xu Yilun Aneesh Kumar K.V (Arm) (16): iommu/arm-smmu-v3: Discover RME support and realm IRQ topology iommu/arm-smmu-v3: Save the programmed MSI message in msi_desc iommu/arm-smmu-v3: Add initial pSMMU realm viommu plumbing iommu/arm-smmu-v3: Track realm pSMMU users with refcount_t coco: host: arm64: Add support for virtual device communication coco: host: arm64: Add support for RMM vdev objects coco: host: arm64: Add pdev stream key refresh and purge helpers coco: host: arm64: Add helpers to unlock and destroy RMM vdev coco: host: arm64: Add support for da object read RHI handling coco: host: arm64: Add helper for cached object fetches coco: host: arm64: Fetch interface report via RMI coco: host: arm64: Fetch device measurements via RMI coco: host: KVM: arm64: Handle vdev validate-mapping exits KVM: arm64: Unmap device mappings when a private granule is destroyed coco: host: arm64: Transition vdevs to TDISP RUN state KVM: arm64: CCA: enable DA in realm create parameters Documentation/virt/kvm/api.rst | 20 + arch/arm64/include/asm/kvm_rmi.h | 4 + arch/arm64/include/asm/rmi_cmds.h | 193 ++++++ arch/arm64/include/asm/rmi_smc.h | 98 ++- arch/arm64/include/uapi/asm/rmi-da.h | 47 ++ arch/arm64/kernel/rmi.c | 51 ++ arch/arm64/kvm/rmi-exit.c | 37 ++ arch/arm64/kvm/rmi.c | 279 ++++++++- drivers/iommu/arm/arm-smmu-v3/Makefile | 2 +- .../arm/arm-smmu-v3/arm-smmu-v3-iommufd.c | 7 + .../iommu/arm/arm-smmu-v3/arm-smmu-v3-realm.c | 297 +++++++++ drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.c | 86 ++- drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3.h | 16 + drivers/virt/coco/arm-cca-host/arm-cca.c | 188 +++++- drivers/virt/coco/arm-cca-host/rmi-da.c | 569 +++++++++++++++++- drivers/virt/coco/arm-cca-host/rmi-da.h | 40 ++ include/uapi/linux/iommufd.h | 1 + include/uapi/linux/kvm.h | 11 + 18 files changed, 1929 insertions(+), 17 deletions(-) create mode 100644 arch/arm64/include/uapi/asm/rmi-da.h create mode 100644 drivers/iommu/arm/arm-smmu-v3/arm-smmu-v3-realm.c -- 2.43.0