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Groups > linux.kernel > #1705169
| From | Alexey Kardashevskiy <aik@ozlabs.ru> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC PATCH v5 2/5] iommu: Set IOMMU_GROUP_CAP_ISOLATE_MSIX if MSI controller enables IRQ remapping |
| Date | 2017-08-07 09:40 +0200 |
| Message-ID | <ubKNP-5gB-1@gated-at.bofh.it> (permalink) |
| References | <ubKNP-5gB-3@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
This sets IOMMU_GROUP_CAP_ISOLATE_MSIX to a group if MSI remapping is enabled on an IRQ domain; this is expected to set the capability on ARM. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> --- drivers/iommu/iommu.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 6b2c34fe2c3d..e720e90fa93c 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -32,6 +32,7 @@ #include <linux/pci.h> #include <linux/bitops.h> #include <linux/property.h> +#include <linux/irqdomain.h> #include <trace/events/iommu.h> static struct kset *iommu_group_kset; @@ -1028,6 +1029,7 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev) const struct iommu_ops *ops = dev->bus->iommu_ops; struct iommu_group *group; int ret; + struct irq_domain *d = dev_get_msi_domain(dev); group = iommu_group_get(dev); if (group) @@ -1070,6 +1072,11 @@ struct iommu_group *iommu_group_get_for_dev(struct device *dev) return ERR_PTR(ret); } + if (d && irq_domain_is_msi(d) && + irq_domain_hierarchical_is_msi_remap(d)) + iommu_group_set_caps(group, 0, + IOMMU_GROUP_CAP_ISOLATE_MSIX); + return group; } -- 2.11.0
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[RFC PATCH v5 2/5] iommu: Set IOMMU_GROUP_CAP_ISOLATE_MSIX if MSI controller enables IRQ remapping Alexey Kardashevskiy <aik@ozlabs.ru> - 2017-08-07 09:40 +0200
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