From: Andrei Cherechesu Date: Thu, 19 Dec 2024 11:23:14 +0000 (+0200) Subject: SUPPORT.md: Describe SCMI-SMC layer feature X-Git-Tag: 4.20.0-rc1~40 X-Git-Url: http://xenbits.xensource.com/gitweb?a=commitdiff_plain;h=294faa3760bd40c1084f5bcc6c213e2e64c64dae;p=xen.git SUPPORT.md: Describe SCMI-SMC layer feature Describe the layer which enables SCMI over SMC calls forwarding to EL3 FW if issued by the Hardware domain. If the SCMI firmware node is not found in the Host DT during initialization, it fails silently as it's not mandatory. The SCMI SMCs trapping at EL2 now lets hwdom perform SCMI ops for interacting with system-level resources almost as if it would be running natively. Signed-off-by: Andrei Cherechesu Reviewed-by: Bertrand Marquis Acked-by: Michal Orzel --- diff --git a/SUPPORT.md b/SUPPORT.md index 998faf5635..54c78b722d 100644 --- a/SUPPORT.md +++ b/SUPPORT.md @@ -935,6 +935,14 @@ Add/Remove device tree nodes using a device tree overlay binary (.dtbo). Status: Tech Preview +### Arm: SCMI over SMC calls forwarding to EL3 Firmware + +Enable SCMI calls using SMC as doorbell mechanism and Shared Memory for +transport ("arm,scmi-smc" compatible only) to reach EL3 Firmware if issued +by hwdom. Some platforms use SCMI for access to system-level resources. + + Status: Supported + ## Virtual Hardware, QEMU This section describes supported devices available in HVM mode using a