mbox series

[v4,0/2] Allow parameter in smc/hvc calls

Message ID 20230418185659.29745-1-quic_nkela@quicinc.com
Headers show
Series Allow parameter in smc/hvc calls | expand

Message

Nikunj Kela April 18, 2023, 6:56 p.m. UTC 
Currently, smc/hvc calls are made with parameters set
to zeros. We are using multiple scmi instances within
a VM. We are sharing the same smc-id(func_id) with all
scmi instance. The hypervisor needs a way to distinguish
among hvc calls made from different instances.

This patch series introduces new compatible string which
can be used to pass shmem channel address as parameters
to smc/hvc calls.

---
v4 -> split shmem address into 4KB-pages and offset

v3 -> pass shmem channel address as parameter

v2 -> fix the compilation erros on 32bit platform(see below)
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202304100606.kUjhsRYf-lkp@intel.com/

v1 -> original patches

Nikunj Kela (2):
  dt-bindings: firmware: arm,scmi: support for parameter in smc/hvc call
  firmware: arm_scmi: Augment SMC/HVC to allow optional parameters

 .../devicetree/bindings/firmware/arm,scmi.yaml     |  8 +++++++-
 drivers/firmware/arm_scmi/driver.c                 |  1 +
 drivers/firmware/arm_scmi/smc.c                    | 14 +++++++++++++-
 3 files changed, 21 insertions(+), 2 deletions(-)