On Wed, 2026-02-18 at 13:51 +0000, Marc Zyngier wrote: > Over the past few years, I have become increasingly annoyed by this > sort of messages in my boot log: > > [ 0.067861] fsl-mc MSI: ITS@0x100100040000 domain created > [ 0.073352] fsl-mc MSI: ITS@0x100100060000 domain created > [ 0.078841] fsl-mc MSI: ITS@0x100100080000 domain created > [ 0.084328] fsl-mc MSI: ITS@0x1001000a0000 domain created > [ 0.089815] fsl-mc MSI: ITS@0x1001000c0000 domain created > [ 0.095303] fsl-mc MSI: ITS@0x1001000e0000 domain created > [ 0.100792] fsl-mc MSI: ITS@0x100100100000 domain created > [ 0.106281] fsl-mc MSI: ITS@0x100100120000 domain created > > While this is useful on fsl-mc systems, this is completely irrelevant > on 99.99999% of the arm64 machines, which know nothing about the > Freescale stuff. Including all of my machine -- bar *one*. > > Global MSI domains such as the above have been obsoleted for the past > two years, but nobody at NXP seems to have got the message. > > The obvious solution is to delete some code! While my first port of > call would be to just 'git rm -r drivers/bus/fsl-mc' (only kidding!), > a less invasive solution is to drag that code into the present times. > Which is what this series is doing by converting the whole thing to > device MSI, reusing the platform MSI infrastructure instead of > duplicating it. > > This results in the expected cleanup, and kills the last user of the > non-device-MSI stuff on arm64. You're welcome. > > Marc Zyngier (6): > fsl-mc: Remove MSI domain propagation to sub-devices > fsl_mc: Add minimal infrastructure to use platform MSI > irqchip/gic-v3-its: Add fsl_mc device plumbing to the msi-parent > handling > fsl_mc: Switch over to per-device platform MSI > fsl_mc: Remove legacy MSI implementation > platform-msi: Remove stale comment > > drivers/base/platform-msi.c | 4 - > drivers/bus/fsl-mc/dprc-driver.c | 14 +- > drivers/bus/fsl-mc/fsl-mc-bus.c | 4 +- > drivers/bus/fsl-mc/fsl-mc-msi.c | 142 +++-------------- > drivers/bus/fsl-mc/fsl-mc-private.h | 2 +- > drivers/irqchip/Kconfig | 6 - > drivers/irqchip/Makefile | 1 - > drivers/irqchip/irq-gic-its-msi-parent.c | 7 +- > drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c | 168 ------------------ > -- > include/linux/fsl/mc.h | 6 +- > 10 files changed, 33 insertions(+), 321 deletions(-) > delete mode 100644 drivers/irqchip/irq-gic-v3-its-fsl-mc-msi.c >
I have tested this series (applied to 6.19) with a SolidRun ClearFog CX LX2 (LX2160A-based), and can confirm that the MSIs are working as I'd expect them to. Therefore: Tested-by: Sascha Bischoff <[email protected]> Thanks, Sascha
