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| author | Lorenzo Pieralisi <lpieralisi@kernel.org> | 2026-01-15 12:50:52 +0300 |
|---|---|---|
| committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2026-01-27 17:31:42 +0300 |
| commit | 05bff3419adaa272713be4c07d287756a4b2c5f5 (patch) | |
| tree | 0d64e20f9d3d03295b48fd8689edc09591a1cbb1 /include/linux | |
| parent | a97efa5ba594642b86fb6702f38ed0d18e3b0269 (diff) | |
| download | linux-05bff3419adaa272713be4c07d287756a4b2c5f5.tar.xz | |
irqchip/gic-v5: Add ACPI IWB probing
To probe an IWB in an ACPI based system it is required:
- to implement the IORT functions handling the IWB IORT node and create
functions to retrieve IWB firmware information
- to augment the driver to match the DSDT ACPI "ARMH0003" device and
retrieve the IWB wire and trigger mask from the GSI interrupt descriptor
in the IWB msi_domain_ops.msi_translate() function
Make the required driver changes to enable IWB probing in ACPI systems.
The GICv5 GSI format requires special handling for IWB routed IRQs.
Add IWB GSI detection to the top level driver gic_v5_get_gsi_domain_id()
function so that the correct IRQ domain for a GSI can be detected by
parsing the GSI and check whether it is an IWB-backed IRQ or not.
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Acked-by: Thomas Gleixner <tglx@kernel.org>
Link: https://patch.msgid.link/20260115-gicv5-host-acpi-v3-6-c13a9a150388@kernel.org
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/acpi_iort.h | 1 | ||||
| -rw-r--r-- | include/linux/irqchip/arm-gic-v5.h | 6 |
2 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/acpi_iort.h b/include/linux/acpi_iort.h index 2d22268677a9..17bb3374f4ca 100644 --- a/include/linux/acpi_iort.h +++ b/include/linux/acpi_iort.h @@ -27,6 +27,7 @@ int iort_register_domain_token(int trans_id, phys_addr_t base, struct fwnode_handle *fw_node); void iort_deregister_domain_token(int trans_id); struct fwnode_handle *iort_find_domain_token(int trans_id); +struct fwnode_handle *iort_iwb_handle(u32 iwb_id); #ifdef CONFIG_ACPI_IORT u32 iort_msi_map_id(struct device *dev, u32 id); diff --git a/include/linux/irqchip/arm-gic-v5.h b/include/linux/irqchip/arm-gic-v5.h index 334b6986435c..3da1ad80fc9d 100644 --- a/include/linux/irqchip/arm-gic-v5.h +++ b/include/linux/irqchip/arm-gic-v5.h @@ -265,6 +265,12 @@ #define GICV5_IWB_WENABLE_STATUSR_IDLE BIT(0) +#define GICV5_GSI_IC_TYPE GENMASK(31, 29) +#define GICV5_GSI_IWB_TYPE 0x7 + +#define GICV5_GSI_IWB_FRAME_ID GENMASK(28, 16) +#define GICV5_GSI_IWB_WIRE GENMASK(15, 0) + /* * Global Data structures and functions */ |