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| author | Marc Zyngier <maz@kernel.org> | 2022-07-20 18:51:21 +0800 |
|---|---|---|
| committer | Marc Zyngier <maz@kernel.org> | 2022-07-20 12:05:17 +0100 |
| commit | 7327b16f5f56741960e11ae4d7ef0ffdff5fd252 (patch) | |
| tree | 169d526622918c08704acd2d0275db446b8bbaa6 /drivers/irqchip/irq-gic-v3.c | |
| parent | af6a1cfa6859dab4a843ea07f1c2f04938f1715b (diff) | |
| download | linux-7327b16f5f56741960e11ae4d7ef0ffdff5fd252.tar.gz linux-7327b16f5f56741960e11ae4d7ef0ffdff5fd252.tar.bz2 linux-7327b16f5f56741960e11ae4d7ef0ffdff5fd252.zip | |
APCI: irq: Add support for multiple GSI domains
In an unfortunate departure from the ACPI spec, the LoongArch
architecture split its GSI space across multiple interrupt
controllers.
In order to be able to reuse the core code and prevent
architectures from reinventing an already square wheel, offer
the arch code the ability to register a dispatcher function
that will return the domain fwnode for a given GSI.
The ARM GIC drivers are updated to support this (with a single
domain, as intended).
Signed-off-by: Marc Zyngier <maz@kernel.org>
Cc: Hanjun Guo <guohanjun@huawei.com>
Cc: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Jianmin Lv <lvjianmin@loongson.cn>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Reviewed-by: Hanjun Guo <guohanjun@huawei.com>
Link: https://lore.kernel.org/r/1658314292-35346-3-git-send-email-lvjianmin@loongson.cn
Diffstat (limited to 'drivers/irqchip/irq-gic-v3.c')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3.c | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/drivers/irqchip/irq-gic-v3.c b/drivers/irqchip/irq-gic-v3.c index 5c1cf907ee68..c66470378074 100644 --- a/drivers/irqchip/irq-gic-v3.c +++ b/drivers/irqchip/irq-gic-v3.c @@ -2360,11 +2360,17 @@ static void __init gic_acpi_setup_kvm_info(void) vgic_set_kvm_info(&gic_v3_kvm_info); } +static struct fwnode_handle *gsi_domain_handle; + +static struct fwnode_handle *gic_v3_get_gsi_domain_id(u32 gsi) +{ + return gsi_domain_handle; +} + static int __init gic_acpi_init(union acpi_subtable_headers *header, const unsigned long end) { struct acpi_madt_generic_distributor *dist; - struct fwnode_handle *domain_handle; size_t size; int i, err; @@ -2396,18 +2402,18 @@ gic_acpi_init(union acpi_subtable_headers *header, const unsigned long end) if (err) goto out_redist_unmap; - domain_handle = irq_domain_alloc_fwnode(&dist->base_address); - if (!domain_handle) { + gsi_domain_handle = irq_domain_alloc_fwnode(&dist->base_address); + if (!gsi_domain_handle) { err = -ENOMEM; goto out_redist_unmap; } err = gic_init_bases(acpi_data.dist_base, acpi_data.redist_regs, - acpi_data.nr_redist_regions, 0, domain_handle); + acpi_data.nr_redist_regions, 0, gsi_domain_handle); if (err) goto out_fwhandle_free; - acpi_set_irq_model(ACPI_IRQ_MODEL_GIC, domain_handle); + acpi_set_irq_model(ACPI_IRQ_MODEL_GIC, gic_v3_get_gsi_domain_id); if (static_branch_likely(&supports_deactivate_key)) gic_acpi_setup_kvm_info(); @@ -2415,7 +2421,7 @@ gic_acpi_init(union acpi_subtable_headers *header, const unsigned long end) return 0; out_fwhandle_free: - irq_domain_free_fwnode(domain_handle); + irq_domain_free_fwnode(gsi_domain_handle); out_redist_unmap: for (i = 0; i < acpi_data.nr_redist_regions; i++) if (acpi_data.redist_regs[i].redist_base) |