diff options
| author | Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org> | 2026-09-23 19:33:58 +0530 |
|---|---|---|
| committer | Catalin Marinas <catalin.marinas@arm.com> | 2026-09-24 11:36:22 +0100 |
| commit | fe7f2a805443368be4e2ed1b4faf3797d65fd134 (patch) | |
| tree | 3ccfcbcf34a5179cbb7840be0dd34d43ec64a347 /scripts | |
| parent | 93f51579e7df248780214094418f205253383cc5 (diff) | |
firmware: smccc: Add an Arm SMCCC bus
SMCCC-discovered firmware services are currently represented by separate
platform devices, such as smccc_trng and arm-cca-dev. Those devices do not
represent independent DT/ACPI-described platform resources; they are
features of the SMCCC firmware interface.
Add an Arm SMCCC bus for services discovered through the SMCCC firmware
interface. The bus provides SMCCC device and driver registration
helpers, function ID based matching, modalias generation, and a sysfs
modalias attribute so SMCCC service drivers can bind to discovered
firmware services and autoload as modules.
Follow-up changes can then register SMCCC firmware services as arm-smccc
devices instead of creating independent per-feature platform devices.
Based on arm_ffa code
Reviewed-by: Jonathan Cameron <jonathan.cameron@oss.qualcomm.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Sudeep Holla <sudeep.holla@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Lorenzo Pieralisi <lpieralisi@kernel.org>
Cc: Sudeep Holla <sudeep.holla@kernel.org>
Cc: Nathan Chancellor <nathan@kernel.org>
Cc: Nicolas Schier <nsc@kernel.org>
Signed-off-by: Aneesh Kumar K.V (Arm) <aneesh.kumar@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'scripts')
| -rw-r--r-- | scripts/mod/devicetable-offsets.c | 3 | ||||
| -rw-r--r-- | scripts/mod/file2alias.c | 8 |
2 files changed, 11 insertions, 0 deletions
diff --git a/scripts/mod/devicetable-offsets.c b/scripts/mod/devicetable-offsets.c index b4178c42d08f..1492e9fdc7cb 100644 --- a/scripts/mod/devicetable-offsets.c +++ b/scripts/mod/devicetable-offsets.c @@ -254,6 +254,9 @@ int main(void) DEVID(auxiliary_device_id); DEVID_FIELD(auxiliary_device_id, name); + DEVID(arm_smccc_device_id); + DEVID_FIELD(arm_smccc_device_id, func_id); + DEVID(ssam_device_id); DEVID_FIELD(ssam_device_id, match_flags); DEVID_FIELD(ssam_device_id, domain); diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c index 8d36c74dec2d..980d7da456bb 100644 --- a/scripts/mod/file2alias.c +++ b/scripts/mod/file2alias.c @@ -1349,6 +1349,13 @@ static void do_auxiliary_entry(struct module *mod, void *symval) module_alias_printf(mod, false, AUXILIARY_MODULE_PREFIX "%s", *name); } +static void do_arm_smccc_entry(struct module *mod, void *symval) +{ + DEF_FIELD(symval, arm_smccc_device_id, func_id); + + module_alias_printf(mod, false, ARM_SMCCC_MODULE_PREFIX "f%08X", func_id); +} + /* * Looks like: ssam:dNcNtNiNfN * @@ -1519,6 +1526,7 @@ static const struct devtable devtable[] = { {"mhi", SIZE_mhi_device_id, do_mhi_entry}, {"mhi_ep", SIZE_mhi_device_id, do_mhi_ep_entry}, {"auxiliary", SIZE_auxiliary_device_id, do_auxiliary_entry}, + {"arm_smccc", SIZE_arm_smccc_device_id, do_arm_smccc_entry}, {"ssam", SIZE_ssam_device_id, do_ssam_entry}, {"dfl", SIZE_dfl_device_id, do_dfl_entry}, {"ishtp", SIZE_ishtp_device_id, do_ishtp_entry}, |