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iommu/amd: Switch to MSI base domains

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Remove the global PCI/MSI irqdomain implementation and provide the required
MSI parent ops so the PCI/MSI code can detect the new parent and setup per
device domains.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Acked-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124232326.209212272@linutronix.de
This commit is contained in:
Thomas Gleixner 2022-11-25 00:26:10 +01:00
parent 9a945234ab
commit cc7594ffad
4 changed files with 15 additions and 7 deletions
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1
arch/x86/kernel/apic/msi.c
View file

@ -218,6 +218,7 @@ static bool x86_init_dev_msi_info(struct device *dev, struct irq_domain *domain,
info->flags |= MSI_FLAG_NOMASK_QUIRK;
break;
case DOMAIN_BUS_DMAR:
case DOMAIN_BUS_AMDVI:
break;
default:
WARN_ON_ONCE(1);

1
drivers/iommu/amd/amd_iommu_types.h
View file

@ -734,7 +734,6 @@ struct amd_iommu {
u8 max_counters;
#ifdef CONFIG_IRQ_REMAP
struct irq_domain *ir_domain;
struct irq_domain *msi_domain;
struct amd_irte_ops *irte_ops;
#endif

19
drivers/iommu/amd/iommu.c
View file

@ -815,7 +815,7 @@ amd_iommu_set_pci_msi_domain(struct device *dev, struct amd_iommu *iommu)
!pci_dev_has_default_msi_parent_domain(to_pci_dev(dev)))
return;
dev_set_msi_domain(dev, iommu->msi_domain);
dev_set_msi_domain(dev, iommu->ir_domain);
}
#else /* CONFIG_IRQ_REMAP */
@ -3648,6 +3648,12 @@ static struct irq_chip amd_ir_chip = {
.irq_compose_msi_msg = ir_compose_msi_msg,
};
static const struct msi_parent_ops amdvi_msi_parent_ops = {
.supported_flags = X86_VECTOR_MSI_FLAGS_SUPPORTED | MSI_FLAG_MULTI_PCI_MSI,
.prefix = "IR-",
.init_dev_msi_info = msi_parent_init_dev_msi_info,
};
int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
{
struct fwnode_handle *fn;
@ -3655,16 +3661,17 @@ int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
fn = irq_domain_alloc_named_id_fwnode("AMD-IR", iommu->index);
if (!fn)
return -ENOMEM;
iommu->ir_domain = irq_domain_create_tree(fn, &amd_ir_domain_ops, iommu);
iommu->ir_domain = irq_domain_create_hierarchy(arch_get_ir_parent_domain(), 0, 0,
fn, &amd_ir_domain_ops, iommu);
if (!iommu->ir_domain) {
irq_domain_free_fwnode(fn);
return -ENOMEM;
}
iommu->ir_domain->parent = arch_get_ir_parent_domain();
iommu->msi_domain = arch_create_remap_msi_irq_domain(iommu->ir_domain,
"AMD-IR-MSI",
iommu->index);
irq_domain_update_bus_token(iommu->ir_domain, DOMAIN_BUS_AMDVI);
iommu->ir_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT;
iommu->ir_domain->msi_parent_ops = &amdvi_msi_parent_ops;
return 0;
}

1
include/linux/irqdomain_defs.h
View file

@ -24,6 +24,7 @@ enum irq_domain_bus_token {
DOMAIN_BUS_PCI_DEVICE_MSI,
DOMAIN_BUS_PCI_DEVICE_MSIX,
DOMAIN_BUS_DMAR,
DOMAIN_BUS_AMDVI,
};
#endif /* _LINUX_IRQDOMAIN_DEFS_H */