Commit fa5745ac authored by Thomas Gleixner's avatar Thomas Gleixner
Browse files

iommu/amd: Enable PCI/IMS 



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: default avatarThomas Gleixner <tglx@linutronix.de>
Reviewed-by: default avatarKevin Tian <kevin.tian@intel.com>
Acked-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20221124232327.140571546@linutronix.de
parent 810531a1

drivers/iommu/amd/iommu.c

+15 −2
Original line number Diff line number Diff line
@@ -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;
@@ -3670,6 +3679,10 @@ 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;



	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;