diff options
| author | Frank Li <Frank.Li@nxp.com> | 2025-04-14 14:30:57 -0400 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2025-05-07 17:49:00 +0200 |
| commit | fd120c38fefd26f1e23f308141f52098c1bbfb31 (patch) | |
| tree | de2f826ddf108faa4daac776c258bb712f1a9a2a | |
| parent | b8c7bfb7a0f01521297d688ca5fe1482c81e8910 (diff) | |
irqchip/gic-v3-its: Set IRQ_DOMAIN_FLAG_MSI_IMMUTABLE for ITS
Set the IRQ_DOMAIN_FLAG_MSI_IMMUTABLE flag for ITS, as it does not change
the address/data pair after setup.
Ensure compatibility with MSI users, such as PCIe Endpoint Doorbell, which
require the address/data pair to remain unchanged. Enable PCIe endpoints to
use ITS for triggering doorbells from the PCIe Root Complex (RC) side.
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/all/20250414-ep-msi-v18-3-f69b49917464@nxp.com
| -rw-r--r-- | drivers/irqchip/irq-gic-v3-its.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/irqchip/irq-gic-v3-its.c b/drivers/irqchip/irq-gic-v3-its.c index 0115ad6c8259..fd6e7c170d37 100644 --- a/drivers/irqchip/irq-gic-v3-its.c +++ b/drivers/irqchip/irq-gic-v3-its.c @@ -5140,7 +5140,7 @@ 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; + inner_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT | IRQ_DOMAIN_FLAG_MSI_IMMUTABLE; return 0; } |