github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-24 23:22:31 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

irqchip/gic-v3-its: Set IRQ_DOMAIN_FLAG_MSI_IMMUTABLE for ITS

Browse Source 
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
This commit is contained in:
Frank Li 2025-04-14 14:30:57 -04:00 committed by Thomas Gleixner
parent b8c7bfb7a0
commit fd120c38fe
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
drivers/irqchip/irq-gic-v3-its.c
View File

@ -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;
}