The following commit has been merged into the irq/core branch of tip:
Commit-ID: fa5745aca1dc819aee6463a2475b5c277f7cf8f6
Gitweb: https://git.kernel.org/tip/fa5745aca1dc819aee6463a2475b5c277f7cf8f6
Author: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
AuthorDate: Fri, 25 Nov 2022 00:26:36 +01:00
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitterDate: Mon, 05 Dec 2022 22:22:35 +01:00
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: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Reviewed-by: Kevin Tian <kevin.tian@xxxxxxxxx>
Acked-by: Marc Zyngier <maz@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20221124232327.140571546@xxxxxxxxxxxxx
---
drivers/iommu/amd/iommu.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c
index 7caccd8..4d28967 100644
--- 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 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;
}
|