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For memory passed to TrustZone (TZ), it must either be part of a pool registered with TZ or explicitly registered via SHMbridge SMC calls. When Gunyah hypervisor is present, PAS SMC calls from Linux running at EL1 are trapped by Gunyah running @ EL2, which handles SHMbridge creation for both metadata and remoteproc carveout memory before invoking the calls to TZ. On SoCs running with a non-Gunyah-based hypervisor, Linux must take responsibility for creating the SHM bridge before invoking PAS SMC calls. For the auth_and_reset() call, the remoteproc carveout memory must first be registered with TZ via a SHMbridge SMC call and once authentication and reset are complete, the SHMbridge memory can be deregistered. Introduce qcom_scm_pas_prepare_and_auth_reset(), which sets up the SHM bridge over the remoteproc carveout memory when Linux operates at EL2. This behavior is indicated by a new field added to the PAS context data structure. The function then invokes the auth_and_reset SMC call. Signed-off-by: Mukesh Ojha <mukesh.ojha@oss.qualcomm.com> Link: https://lore.kernel.org/r/20260105-kvmrprocv10-v10-8-022e96815380@oss.qualcomm.com Signed-off-by: Bjorn Andersson <andersson@kernel.org>