linux-kernel - [PATCH v2 00/12] coc: tsm: Implement ->connect()/->disconnect() callbacks for ARM CCA IDE setup

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Message-ID: <20251027094916.1153143-13-aneesh.kumar@kernel.org>
Date: Mon, 27 Oct 2025 15:19:04 +0530
From: "Aneesh Kumar K.V (Arm)" <aneesh.kumar@...nel.org>
To: linux-coco@...ts.linux.dev,
	kvmarm@...ts.linux.dev
Cc: linux-pci@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	dan.j.williams@...el.com,
	aik@....com,
	lukas@...ner.de,
	Samuel Ortiz <sameo@...osinc.com>,
	Xu Yilun <yilun.xu@...ux.intel.com>,
	Jason Gunthorpe <jgg@...pe.ca>,
	Suzuki K Poulose <Suzuki.Poulose@....com>,
	Steven Price <steven.price@....com>,
	Bjorn Helgaas <helgaas@...nel.org>,
	Jonathan Cameron <Jonathan.Cameron@...wei.com>,
	Catalin Marinas <catalin.marinas@....com>,
	Marc Zyngier <maz@...nel.org>,
	Will Deacon <will@...nel.org>,
	Oliver Upton <oliver.upton@...ux.dev>,
	"Aneesh Kumar K.V (Arm)" <aneesh.kumar@...nel.org>
Subject: [PATCH v2 00/12] coc: tsm: Implement ->connect()/->disconnect() callbacks for ARM CCA IDE setup

This patch series implements the TSM ->connect() and ->disconnect() callbacks
required for the ARM CCA IDE setup described in the RMM ALP17 specification [1].

The series builds upon the TSM framework patches posted at [2] and depends on
the KVM CCA patchset [3]. A git repository containing all the related changes is
available at [4].

Testing / Usage

To initiate the IDE setup:
echo tsm0 > /sys/bus/pci/devices/$DEVICE/tsm/connect

To disconnect:
echo tsm0 > /sys/bus/pci/devices/$DEVICE/tsm/disconnect

[1] https://developer.arm.com/-/cdn-downloads/permalink/Architectures/Armv9/DEN0137_1.1-alp17.zip
[2] https://lore.kernel.org/all/20251024020418.1366664-1-dan.j.williams@intel.com
[3] https://lore.kernel.org/all/461fa23f-9add-40e5-a0d0-759030e7c70b@arm.com
[4] https://git.gitlab.arm.com/linux-arm/linux-cca.git cca/topics/cca-ide-setup-upstream-v2


Aneesh Kumar K.V (Arm) (9):
  KVM: arm64: RMI: Export kvm_has_da_feature
  firmware: smccc: coco: Manage arm-smccc platform device and CCA
    auxiliary drivers
  coco: guest: arm64: Drop dummy RSI platform device stub
  coco: host: arm64: Add host TSM callback and IDE stream allocation
    support
  coco: host: arm64: Build and register RMM pdev descriptors
  coco: host: arm64: Add RMM device communication helpers
  coco: host: arm64: Add helper to stop and tear down an RMM pdev
  coco: host: arm64: Instantiate RMM pdev during device connect
  coco: host: arm64: Register device public key with RMM

Lukas Wunner (3):
  X.509: Make certificate parser public
  X.509: Parse Subject Alternative Name in certificates
  X.509: Move certificate length retrieval into new helper

 arch/arm64/include/asm/kvm_rmi.h              |   1 +
 arch/arm64/include/asm/rmi_cmds.h             |  78 +++
 arch/arm64/include/asm/rmi_smc.h              | 180 +++++-
 arch/arm64/include/asm/rsi.h                  |   2 +-
 arch/arm64/kernel/rsi.c                       |  15 -
 arch/arm64/kvm/rmi.c                          |   6 +
 crypto/asymmetric_keys/x509_cert_parser.c     |   9 +
 crypto/asymmetric_keys/x509_loader.c          |  38 +-
 crypto/asymmetric_keys/x509_parser.h          |  40 +-
 drivers/firmware/smccc/Kconfig                |   1 +
 drivers/firmware/smccc/smccc.c                |  56 ++
 drivers/virt/coco/Kconfig                     |   2 +
 drivers/virt/coco/Makefile                    |   1 +
 drivers/virt/coco/arm-cca-guest/Kconfig       |   1 +
 drivers/virt/coco/arm-cca-guest/Makefile      |   2 +
 .../{arm-cca-guest.c => arm-cca.c}            |  57 +-
 drivers/virt/coco/arm-cca-host/Kconfig        |  23 +
 drivers/virt/coco/arm-cca-host/Makefile       |   5 +
 drivers/virt/coco/arm-cca-host/arm-cca.c      | 261 ++++++++
 drivers/virt/coco/arm-cca-host/rmi-da.c       | 608 ++++++++++++++++++
 drivers/virt/coco/arm-cca-host/rmi-da.h       | 111 ++++
 include/keys/asymmetric-type.h                |   2 +
 include/keys/x509-parser.h                    |  55 ++
 23 files changed, 1457 insertions(+), 97 deletions(-)
 rename drivers/virt/coco/arm-cca-guest/{arm-cca-guest.c => arm-cca.c} (85%)
 create mode 100644 drivers/virt/coco/arm-cca-host/Kconfig
 create mode 100644 drivers/virt/coco/arm-cca-host/Makefile
 create mode 100644 drivers/virt/coco/arm-cca-host/arm-cca.c
 create mode 100644 drivers/virt/coco/arm-cca-host/rmi-da.c
 create mode 100644 drivers/virt/coco/arm-cca-host/rmi-da.h
 create mode 100644 include/keys/x509-parser.h

-- 
2.43.0