firmware: arm_scmi: Add qcom smc/hvc transport support

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This change adds the support for SCMI message exchange on Qualcomm
virtual platforms.

The hypervisor associates an object-id also known as capability-id
with each smc/hvc doorbell object. The capability-id is used to
identify the doorbell from the VM's capability namespace, similar
to a file-descriptor.

The hypervisor, in addition to the function-id, expects the capability-id
to be passed in x1 register when SMC/HVC call is invoked.

The capability-id is allocated by the hypervisor on bootup and is stored in
the shmem region by the firmware before starting Linux.

Signed-off-by: Nikunj Kela <quic_nkela@quicinc.com>
Reviewed-by: Brian Masney <bmasney@redhat.com>
Link: https://lore.kernel.org/r/20231009191437.27926-3-quic_nkela@quicinc.com
Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>

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This commit is contained in:

Nikunj Kela 2023-10-09 12:14:37 -07:00 • committed by Sudeep Holla

parent 6979f88f5a

commit da405477e7

2 changed files with 26 additions and 2 deletions

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1

drivers/firmware/arm_scmi/driver.c

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27

drivers/firmware/arm_scmi/smc.c

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