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iommu/amd: Enable PCI/IMS

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PCI/IMS works like PCI/MSI-X in the remapping. Just add the feature flag,
but only when on real hardware.

Virtualized IOMMUs need additional support.

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/20221124232327.140571546@linutronix.de
This commit is contained in:
Thomas Gleixner 2022-11-25 00:26:36 +01:00
parent 810531a1af
commit fa5745aca1
1 changed files with 15 additions and 2 deletions
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17
drivers/iommu/amd/iommu.c
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@ -3649,11 +3649,20 @@ static struct irq_chip amd_ir_chip = {
};
static const struct msi_parent_ops amdvi_msi_parent_ops = {
.supported_flags = X86_VECTOR_MSI_FLAGS_SUPPORTED | MSI_FLAG_MULTI_PCI_MSI,
.supported_flags = X86_VECTOR_MSI_FLAGS_SUPPORTED |
MSI_FLAG_MULTI_PCI_MSI |
MSI_FLAG_PCI_IMS,
.prefix = "IR-",
.init_dev_msi_info = msi_parent_init_dev_msi_info,
};
static const struct msi_parent_ops virt_amdvi_msi_parent_ops = {
.supported_flags = X86_VECTOR_MSI_FLAGS_SUPPORTED |
MSI_FLAG_MULTI_PCI_MSI,
.prefix = "vIR-",
.init_dev_msi_info = msi_parent_init_dev_msi_info,
};
int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
{
struct fwnode_handle *fn;
@ -3670,7 +3679,11 @@ int amd_iommu_create_irq_domain(struct amd_iommu *iommu)
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;
if (amd_iommu_np_cache)
iommu->ir_domain->msi_parent_ops = &virt_amdvi_msi_parent_ops;
else
iommu->ir_domain->msi_parent_ops = &amdvi_msi_parent_ops;
return 0;
}