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iommu/vt-d: 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, 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
This commit is contained in:
Thomas Gleixner 2022-11-25 00:26:34 +01:00
parent 6e24c88773
commit 810531a1af
1 changed files with 16 additions and 3 deletions
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19
drivers/iommu/intel/irq_remapping.c
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@ -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
*/