[patch V3 32/33] iommu/amd: Enable PCI/IMS

[Thomas Gleixner]

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@xxxxxxxxxxxxx>
---
V3: Only enable on real hardware (Kevin)
---
 drivers/iommu/amd/iommu.c |   17 +++++++++++++++--
 1 file changed, 15 insertions(+), 2 deletions(-)

--- a/drivers/iommu/amd/iommu.c
+++ b/drivers/iommu/amd/iommu.c
@@ -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 a
 
 	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;
 }