diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2022-11-25 02:26:34 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2022-12-06 00:22:35 +0300 |
| commit | 810531a1af5393f010d6508b1cb48e6650fc5e8f (patch) | |
| tree | bb90e248d91e5261090e960f83fd2cb02cbfebe2 /drivers/iommu | |
| parent | 6e24c887732901140f4e82ba2315c2e15f06f1d6 (diff) | |
| download | linux-810531a1af5393f010d6508b1cb48e6650fc5e8f.tar.xz | |
iommu/vt-d: 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, e.g. for PASID.
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/20221124232327.081482253@linutronix.de
Diffstat (limited to 'drivers/iommu')
| -rw-r--r-- | drivers/iommu/intel/irq_remapping.c | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/iommu/intel/irq_remapping.c b/drivers/iommu/intel/irq_remapping.c index 6fab4076a9e2..a723f53ba472 100644 --- a/drivers/iommu/intel/irq_remapping.c +++ b/drivers/iommu/intel/irq_remapping.c @@ -82,7 +82,7 @@ static const struct irq_domain_ops intel_ir_domain_ops; static void iommu_disable_irq_remapping(struct intel_iommu *iommu); static int __init parse_ioapics_under_ir(void); -static const struct msi_parent_ops dmar_msi_parent_ops; +static const struct msi_parent_ops dmar_msi_parent_ops, virt_dmar_msi_parent_ops; static bool ir_pre_enabled(struct intel_iommu *iommu) { @@ -577,7 +577,11 @@ static int intel_setup_irq_remapping(struct intel_iommu *iommu) irq_domain_update_bus_token(iommu->ir_domain, DOMAIN_BUS_DMAR); iommu->ir_domain->flags |= IRQ_DOMAIN_FLAG_MSI_PARENT; - iommu->ir_domain->msi_parent_ops = &dmar_msi_parent_ops; + + if (cap_caching_mode(iommu->cap)) + iommu->ir_domain->msi_parent_ops = &virt_dmar_msi_parent_ops; + else + iommu->ir_domain->msi_parent_ops = &dmar_msi_parent_ops; ir_table->base = page_address(pages); ir_table->bitmap = bitmap; @@ -1429,11 +1433,20 @@ static const struct irq_domain_ops intel_ir_domain_ops = { }; static const struct msi_parent_ops dmar_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_dmar_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, +}; + /* * Support of Interrupt Remapping Unit Hotplug */ |