Anup Patel <apatel@xxxxxxxxxxxxxxxx> writes: > The Linux PCI framework supports per-device MSI domains for PCI devices > so extend the IMSIC driver to allow PCI per-device MSI domains. > > Signed-off-by: Anup Patel <apatel@xxxxxxxxxxxxxxxx> > --- > drivers/irqchip/Kconfig | 7 +++++ > drivers/irqchip/irq-riscv-imsic-platform.c | 35 ++++++++++++++++++++-- > 2 files changed, 40 insertions(+), 2 deletions(-) > > diff --git a/drivers/irqchip/Kconfig b/drivers/irqchip/Kconfig > index 85f86e31c996..2fc0cb32341a 100644 > --- a/drivers/irqchip/Kconfig > +++ b/drivers/irqchip/Kconfig > @@ -553,6 +553,13 @@ config RISCV_IMSIC > select GENERIC_IRQ_MATRIX_ALLOCATOR > select GENERIC_MSI_IRQ > > +config RISCV_IMSIC_PCI > + bool > + depends on RISCV_IMSIC > + depends on PCI > + depends on PCI_MSI > + default RISCV_IMSIC > + > config EXYNOS_IRQ_COMBINER > bool "Samsung Exynos IRQ combiner support" if COMPILE_TEST > depends on (ARCH_EXYNOS && ARM) || COMPILE_TEST > diff --git a/drivers/irqchip/irq-riscv-imsic-platform.c b/drivers/irqchip/irq-riscv-imsic-platform.c > index e2344fc08dca..90ddcdd0bba5 100644 > --- a/drivers/irqchip/irq-riscv-imsic-platform.c > +++ b/drivers/irqchip/irq-riscv-imsic-platform.c > @@ -14,6 +14,7 @@ > #include <linux/irqdomain.h> > #include <linux/module.h> > #include <linux/msi.h> > +#include <linux/pci.h> > #include <linux/platform_device.h> > #include <linux/spinlock.h> > #include <linux/smp.h> > @@ -208,6 +209,28 @@ static const struct irq_domain_ops imsic_base_domain_ops = { > #endif > }; > > +#ifdef CONFIG_RISCV_IMSIC_PCI > + > +static void imsic_pci_mask_irq(struct irq_data *d) > +{ > + pci_msi_mask_irq(d); > + irq_chip_mask_parent(d); > +} > + > +static void imsic_pci_unmask_irq(struct irq_data *d) > +{ > + irq_chip_unmask_parent(d); > + pci_msi_unmask_irq(d); > +} > + > +#define MATCH_PCI_MSI BIT(DOMAIN_BUS_PCI_MSI) > + > +#else > + > +#define MATCH_PCI_MSI 0 > + > +#endif > + > static bool imsic_init_dev_msi_info(struct device *dev, > struct irq_domain *domain, > struct irq_domain *real_parent, > @@ -231,6 +254,13 @@ static bool imsic_init_dev_msi_info(struct device *dev, > > /* Is the target supported? */ > switch (info->bus_token) { > +#ifdef CONFIG_RISCV_IMSIC_PCI > + case DOMAIN_BUS_PCI_DEVICE_MSI: > + case DOMAIN_BUS_PCI_DEVICE_MSIX: > + info->chip->irq_mask = imsic_pci_mask_irq; > + info->chip->irq_unmask = imsic_pci_unmask_irq; irq_set_affinity()? Björn