This is v2 of a series I posted[1] a few months back before running
out of time, energy, and interest. I have now reduced it to the stuff
I actually care about, and got rid of all things non-arm64.
I've become annoyed by the couple of machines I have around that
haven't been converted to the per-device MSI infrastructure. At the
same time, I've also moaned at the amount of boilerplate code required
to make use of this infrastructure.
This series therefore does a number of things:
- make irq-msi-lib.h globally available, so that PCI (and other
subsystems) may make use of it
- add a new helper (msi_create_parent_irq_domain()) that encapsulates
most of the magic required to create an MSI-parent domain
- convert the arm64 I have access to (and *only* that)
- convert the Apple, XGene and Tegra MSI drivers to the MSI-parent
infrastructure, which is why I came here the first place.
* From v1 [1]:
- use irq_domain_info as an the holder of most information required
to instantiate the domain. I decided against using a specific
structure, because they would mostly have the same fields.
- added a patch to convert the Tegra driver, which required dealing
with the MSI_FLAG_NO_AFFINITY flag
- got rid of x86 and riscv patches (life is too short).
[1] https://lore.kernel.org/all/20241204124549.607054-1-maz@xxxxxxxxxx
Marc Zyngier (9):
irqchip: Make irq-msi-lib.h globally available
genirq/msi: Add helper for creating MSI-parent irq domains
irqchip/gic: Convert to msi_create_parent_irq_domain() helper
irqchip/mvebu: Convert to msi_create_parent_irq_domain() helper
irqchip: Drop MSI_CHIP_FLAG_SET_ACK from unsuspecting MSI drivers
irqchip/msi-lib: Honour the MSI_FLAG_NO_AFFINITY flag
PCI: apple: Convert to MSI parent infrastructure
PCI: xgene: Convert to MSI parent infrastructure
PCI: tegra: Convert to MSI parent infrastructure
drivers/irqchip/irq-bcm2712-mip.c | 2 +-
drivers/irqchip/irq-gic-v2m.c | 16 ++---
drivers/irqchip/irq-gic-v3-its-msi-parent.c | 4 +-
drivers/irqchip/irq-gic-v3-its.c | 21 +++----
drivers/irqchip/irq-gic-v3-mbi.c | 15 ++---
drivers/irqchip/irq-imx-mu-msi.c | 2 +-
drivers/irqchip/irq-loongarch-avec.c | 2 +-
drivers/irqchip/irq-loongson-pch-msi.c | 2 +-
drivers/irqchip/irq-msi-lib.c | 9 ++-
drivers/irqchip/irq-mvebu-gicp.c | 18 +++---
drivers/irqchip/irq-mvebu-icu.c | 2 +-
drivers/irqchip/irq-mvebu-odmi.c | 18 +++---
drivers/irqchip/irq-mvebu-sei.c | 18 +++---
drivers/irqchip/irq-riscv-imsic-platform.c | 2 +-
drivers/irqchip/irq-sg2042-msi.c | 2 +-
drivers/pci/controller/Kconfig | 3 +
drivers/pci/controller/pci-tegra.c | 60 ++++++------------
drivers/pci/controller/pci-xgene-msi.c | 46 +++++---------
drivers/pci/controller/pcie-apple.c | 62 +++++++------------
.../linux}/irqchip/irq-msi-lib.h | 6 +-
include/linux/msi.h | 4 ++
kernel/irq/msi.c | 26 ++++++++
22 files changed, 160 insertions(+), 180 deletions(-)
rename {drivers => include/linux}/irqchip/irq-msi-lib.h (84%)
--
2.39.2
