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| author | Thomas Gleixner <tglx@linutronix.de> | 2024-06-23 17:18:36 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2024-07-18 20:31:19 +0200 |
| commit | 48f71d56e2b87839052d2a2ec32fc97a79c3e264 (patch) | |
| tree | df90e78296825aafdbd3d818a117714baf1bb29f /drivers/irqchip/irq-gic-v3-its.c | |
| parent | 72e257c6f058032daba1c4fe0c81003d545d0f81 (diff) | |
| download | linux-48f71d56e2b87839052d2a2ec32fc97a79c3e264.tar.gz linux-48f71d56e2b87839052d2a2ec32fc97a79c3e264.tar.bz2 linux-48f71d56e2b87839052d2a2ec32fc97a79c3e264.zip | |
irqchip/gic-v3-its: Provide MSI parent infrastructure
To support per device MSI domains the ITS must provide MSI parent domain
functionality.
Provide the basic skeleton for this:
- msi_parent_ops
- child domain init callback
- the MSI parent flag set in irqdomain::flags
This does not make ITS a functional parent domain as there is no bit set in
the bus_select_mask yet, but it provides the base to implement PCI and
platform MSI support gradually on top.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Anna-Maria Behnsen <anna-maria@linutronix.de>
Signed-off-by: Shivamurthy Shastri <shivamurthy.shastri@linutronix.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20240623142234.903076277@linutronix.de
Diffstat (limited to 'drivers/irqchip/irq-gic-v3-its.c')
| -rw-r--r-- | drivers/irqchip/irq-gic-v3-its.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 3c755d5dad6e..d770d6aedb29 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -38,6 +38,7 @@ #include <asm/exception.h> #include "irq-gic-common.h" +#include "irq-msi-lib.h" #define ITS_FLAGS_CMDQ_NEEDS_FLUSHING (1ULL << 0) #define ITS_FLAGS_WORKAROUND_CAVIUM_22375 (1ULL << 1) @@ -3688,6 +3689,7 @@ static void its_irq_domain_free(struct irq_domain *domain, unsigned int virq, } static const struct irq_domain_ops its_domain_ops = { + .select = msi_lib_irq_domain_select, .alloc = its_irq_domain_alloc, .free = its_irq_domain_free, .activate = its_irq_domain_activate, @@ -4993,6 +4995,9 @@ static int its_init_domain(struct its_node *its) irq_domain_update_bus_token(inner_domain, DOMAIN_BUS_NEXUS); + inner_domain->msi_parent_ops = &gic_v3_its_msi_parent_ops; + inner_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT; + return 0; } |