This series adds support for the latest improvements made in SCM firmware that allow for multiple wait-queues in firmware. To support multi VM synchronization when VMs make SMC calls on same CPU, waitqueue mechanism is added in firmware which runs at EL2 & EL3 exception levels. The macros defined in the first patch are only used in SCM driver and will be dropped once Gunyah hypervisor driver patches are merged as fill_irq_fwspec_params() is reused from here: https://lore.kernel.org/all/20240405081735319-0700.eberman@xxxxxxxxxxxxxxxxxxxxxxxxxx/ P.S. While at Qualcomm, Guru Das Srinagesh authored the initial version of these patches. Thanks Guru! --- Changes in v2: - Dropped "Initialize waitq before setting global __scm" as it was merged here: https://lore.kernel.org/r/1711034642-22860-4-git-send-email-quic_mojha@xxxxxxxxxxx - Decoupled "Remove QCOM_SMC_WAITQ_FLAG_WAKE_ALL" from series - Converted xarray to a statically sized array - Initialize waitq array in probe function - Remove reinit of waitq completion struct in scm_get_completion() - Introduced new APIs to get no. of waitqueue contexts and waitqueue IRQ no. directly from firmware. - Link to v1: https://lore.kernel.org/all/20240228-multi_waitq-v1-0-ccb096419af0@xxxxxxxxxxx/ Unnathi Chalicheemala (2): firmware: qcom_scm: Add API to get waitqueue IRQ info firmware: qcom_scm: Support multiple waitq contexts drivers/firmware/qcom/qcom_scm.c | 135 ++++++++++++++++++++++++++----- drivers/firmware/qcom/qcom_scm.h | 1 + 2 files changed, 116 insertions(+), 20 deletions(-) -- 2.34.1
