mirrors/linux
2
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-08-28 05:14:41 -04:00
Code Issues Packages Projects Releases Wiki Activity

irqchip/gic-v5: Enable GICv5 IWB ACPI probe ordering detection

Browse Source 
Register an ACPI hook in the ACPI interrupt management code for GICv5 to
retrieve the ACPI interrupt controller handle (if any) of the controller
handling a specific GSI, by updating the acpi_set_irq_model() call with
the gic_v5_get_gsi_handle() function pointer parameter.

gicv5_get_gsi_handle() allows ACPI core to detect the ACPI handle
of the controller that manages a specific GSI interrupt.

Update the IWB driver to clear device dependencies in ACPI core once the
IWB driver has probed.

Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Acked-by: Thomas Gleixner <tglx@kernel.org>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://patch.msgid.link/20260709-gic-v5-acpi-iwb-probe-deferral-v4-7-48dae790f871@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
This commit is contained in:
Lorenzo Pieralisi
2026-07-09 10:40:17 +02:00
committed by Rafael J. Wysocki
parent 5a64611747
commit d2aa7b179a
2 changed files with 12 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/irqchip/irq-gic-v5-iwb.c
View File

@@ -269,6 +269,8 @@ static int gicv5_iwb_device_probe(struct platform_device *pdev)
if (IS_ERR(iwb_node))
return PTR_ERR(iwb_node);
acpi_device_clear_deps(&pdev->dev);
return 0;
}

11
drivers/irqchip/irq-gic-v5.c
View File

@@ -1231,6 +1231,14 @@ static struct fwnode_handle *gic_v5_get_gsi_domain_id(u32 gsi)
return gsi_domain_handle;
}
static acpi_handle gic_v5_get_gsi_handle(u32 gsi)
{
if (FIELD_GET(GICV5_GSI_IC_TYPE, gsi) == GICV5_GSI_IWB_TYPE)
return iort_iwb_handle(FIELD_GET(GICV5_GSI_IWB_FRAME_ID, gsi));
return NULL;
}
static int __init gic_acpi_init(union acpi_subtable_headers *header, const unsigned long end)
{
struct acpi_madt_gicv5_irs *irs = (struct acpi_madt_gicv5_irs *)header;
@@ -1251,7 +1259,8 @@ static int __init gic_acpi_init(union acpi_subtable_headers *header, const unsig
if (ret)
goto out_irs;
acpi_set_irq_model(ACPI_IRQ_MODEL_GIC_V5, gic_v5_get_gsi_domain_id, NULL);
acpi_set_irq_model(ACPI_IRQ_MODEL_GIC_V5, gic_v5_get_gsi_domain_id,
gic_v5_get_gsi_handle);
return 0;