[PATCH V3 04/16] platform/x86/intel/pmt: Pass discovery index instead of resource

David E. Box
2026-05-01T23:11:02Z

Change PMT class code to pass a discovery index rather than a direct struct
resource when creating entries. This allows the class to identify the
discovery source generically without assuming PCI BAR resources. For PCI
devices, the index still resolves to a resource in the intel_vsec_device.
Other discovery sources, such as ACPI, can use the same index without
needing a struct resource.

Signed-off-by: David E. Box <david.e.box@linux.intel.com>
---
V3 changes:
- Rebased after dropping the previous "Move header decode into common
helper" patch
- Adjusted the intel_pmt_populate_entry() call path to match the restored
intel_pmt_dev_create() flow
- Did not apply Ilpo V2 signoff due to these changes.

V2 - No changes

drivers/platform/x86/intel/pmt/class.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/intel/pmt/class.c b/drivers/platform/x86/intel/pmt/class.c
index 9b315334a69b..7da8279b54f8 100644
--- a/drivers/platform/x86/intel/pmt/class.c
+++ b/drivers/platform/x86/intel/pmt/class.c
@@ -206,11 +206,12 @@ EXPORT_SYMBOL_GPL(intel_pmt_class);

static int intel_pmt_populate_entry(struct intel_pmt_entry *entry,
struct intel_vsec_device *ivdev,
- struct resource *disc_res)
+ int idx)
{
struct pci_dev *pci_dev = to_pci_dev(ivdev->dev);
struct device *dev = &ivdev->auxdev.dev;
struct intel_pmt_header *header = &entry->header;
+ struct resource *disc_res;
u8 bir;

/*
@@ -235,6 +236,7 @@ static int intel_pmt_populate_entry(struct intel_pmt_entry *entry,
* For access_type LOCAL, the base address is as follows:
* base address = end of discovery region + base offset
*/
+ disc_res = &ivdev->resource[idx];
entry->base_addr = disc_res->end + 1 + header->base_offset;

/*
@@ -397,7 +399,7 @@ int intel_pmt_dev_create(struct intel_pmt_entry *entry, struct intel_pmt_namespa
return ret;
}

- ret = intel_pmt_populate_entry(entry, intel_vsec_dev, disc_res);
+ ret = intel_pmt_populate_entry(entry, intel_vsec_dev, idx);
if (ret)
return ret;

--
2.43.0