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

Aneesh Kumar K.V (Arm)
2025-10-27T09:51:14Z

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

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2.43.0