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platform/x86/intel/vsec: Skip driverless features

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If a feature lacks a corresponding driver and that feature is also a
supplier, registering it would be prevent the consumer driver from probing.
Introduces logic to skip such features during device registration.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
Link: https://lore.kernel.org/r/20250703022832.1302928-7-david.e.box@linux.intel.com
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
This commit is contained in:
David E. Box
2025-07-02 19:28:21 -07:00
committed by Ilpo Järvinen
parent 1f3855ea7d
commit e4436e9867
1 changed files with 27 additions and 1 deletions
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28
drivers/platform/x86/intel/vsec.c
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@@ -123,6 +123,26 @@ get_consumer_dependencies(struct vsec_priv *priv, int cap_id)
return NULL;
}
static bool vsec_driver_present(int cap_id)
{
unsigned long bit = BIT(cap_id);
switch (bit) {
case VSEC_CAP_TELEMETRY:
return IS_ENABLED(CONFIG_INTEL_PMT_TELEMETRY);
case VSEC_CAP_WATCHER:
return IS_ENABLED(CONFIG_INTEL_PMT_WATCHER);
case VSEC_CAP_CRASHLOG:
return IS_ENABLED(CONFIG_INTEL_PMT_CRASHLOG);
case VSEC_CAP_SDSI:
return IS_ENABLED(CONFIG_INTEL_SDSI);
case VSEC_CAP_TPMI:
return IS_ENABLED(CONFIG_INTEL_TPMI);
default:
return false;
}
}
/*
* Although pci_device_id table is available in the pdev, this prototype is
* necessary because the code using it can be called by an exported API that
@@ -158,7 +178,8 @@ static int intel_vsec_link_devices(struct pci_dev *pdev, struct device *dev,
for_each_set_bit(supplier_id, &deps->supplier_bitmap, VSEC_FEATURE_COUNT) {
struct device_link *link;
if (state[supplier_id] != STATE_REGISTERED)
if (state[supplier_id] != STATE_REGISTERED ||
!vsec_driver_present(supplier_id))
continue;
if (!suppliers[supplier_id]) {
@@ -405,6 +426,11 @@ static int intel_vsec_register_device(struct pci_dev *pdev,
priv->found_caps |= BIT(cap_id);
if (!vsec_driver_present(cap_id)) {
priv->state[cap_id] = STATE_SKIP;
return -ENODEV;
}
consumer_deps = get_consumer_dependencies(priv, cap_id);
if (!consumer_deps || suppliers_ready(priv, consumer_deps, cap_id)) {
ret = intel_vsec_add_dev(pdev, header, info, cap_id);