This patch series implements the TSM ->lock(), ->unlock and ->accept() callbacks
required for the TDISP setup with ARM CCA described in the RMM ALP17 specification [1].

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 

[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://git.gitlab.arm.com/linux-arm/linux-cca.git cca/topics/cca-guest-setup-upstream-v2


Aneesh Kumar K.V (Arm) (11):
  coco: guest: arm64: Guest TSM callback and realm device lock support
  coco: guest: arm64: Add Realm Host Interface and guest DA helper
  coco: guest: arm64: Add support for guest initiated TDI bind/unbind
  coco: guest: arm64: Add support for updating interface reports from
    device
  coco: guest: arm64: Add support for updating measurements from device
  coco: guest: arm64: Add support for reading cached objects from host
  coco: guest: arm64: Validate Realm MMIO mappings from TDISP report
  coco: guest: arm64: Add support for fetching and verifying device info
  coco: guest: arm64: Wire Realm TDISP RUN/STOP transitions into guest
    driver
  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              |  77 +++++
 arch/arm64/include/asm/rsi.h              |   3 +
 arch/arm64/include/asm/rsi_cmds.h         |  81 +++++
 arch/arm64/include/asm/rsi_smc.h          |  58 ++++
 arch/arm64/kernel/rsi.c                   |  11 +
 arch/arm64/mm/mem_encrypt.c               |  10 +
 drivers/virt/coco/Makefile                |   2 +-
 drivers/virt/coco/arm-cca-guest/Kconfig   |  10 +-
 drivers/virt/coco/arm-cca-guest/Makefile  |   3 +-
 drivers/virt/coco/arm-cca-guest/arm-cca.c |  95 +++++-
 drivers/virt/coco/arm-cca-guest/rhi-da.c  | 330 ++++++++++++++++++++
 drivers/virt/coco/arm-cca-guest/rhi-da.h  |  18 ++
 drivers/virt/coco/arm-cca-guest/rsi-da.c  | 354 ++++++++++++++++++++++
 drivers/virt/coco/arm-cca-guest/rsi-da.h  |  83 +++++
 include/linux/swiotlb.h                   |   5 +
 16 files changed, 1137 insertions(+), 9 deletions(-)
 create mode 100644 arch/arm64/include/asm/rhi.h
 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

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2.43.0