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Groups > linux.kernel > #1522677
| From | Eric Auger <eric.auger@redhat.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [RFC v3 08/10] iommu/vt-d: Implement reserved region get/put callbacks |
| Date | 2016-11-15 14:20 +0100 |
| Message-ID | <sDLOy-5pg-15@gated-at.bofh.it> (permalink) |
| References | <sDLER-5lG-1@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
This patch registers the [FEE0_0000h - FEF0_000h] 1MB MSI range
as a reserved region. This will allow to report that range
in the iommu-group sysfs.
Signed-off-by: Eric Auger <eric.auger@redhat.com>
---
RFCv2 -> RFCv3:
- use get/put_resv_region callbacks.
RFC v1 -> RFC v2:
- fix intel_iommu_add_reserved_regions name
- use IOAPIC_RANGE_START and IOAPIC_RANGE_END defines
- return if the MSI region is already registered;
---
drivers/iommu/intel-iommu.c | 50 +++++++++++++++++++++++++++++++++------------
1 file changed, 37 insertions(+), 13 deletions(-)
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index 3965e73..8dada8f 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5183,6 +5183,28 @@ static void intel_iommu_remove_device(struct device *dev)
iommu_device_unlink(iommu->iommu_dev, dev);
}
+static void intel_iommu_get_resv_regions(struct device *device,
+ struct list_head *head)
+{
+ struct iommu_resv_region *reg;
+
+ reg = iommu_alloc_resv_region(IOAPIC_RANGE_START,
+ IOAPIC_RANGE_END - IOAPIC_RANGE_START + 1,
+ IOMMU_RESV_NOMAP);
+ if (!reg)
+ return;
+ list_add_tail(®->list, head);
+}
+
+static void intel_iommu_put_resv_regions(struct device *dev,
+ struct list_head *head)
+{
+ struct iommu_resv_region *entry, *next;
+
+ list_for_each_entry_safe(entry, next, head, list)
+ kfree(entry);
+}
+
#ifdef CONFIG_INTEL_IOMMU_SVM
int intel_iommu_enable_pasid(struct intel_iommu *iommu, struct intel_svm_dev *sdev)
{
@@ -5292,19 +5314,21 @@ struct intel_iommu *intel_svm_device_to_iommu(struct device *dev)
#endif /* CONFIG_INTEL_IOMMU_SVM */
static const struct iommu_ops intel_iommu_ops = {
- .capable = intel_iommu_capable,
- .domain_alloc = intel_iommu_domain_alloc,
- .domain_free = intel_iommu_domain_free,
- .attach_dev = intel_iommu_attach_device,
- .detach_dev = intel_iommu_detach_device,
- .map = intel_iommu_map,
- .unmap = intel_iommu_unmap,
- .map_sg = default_iommu_map_sg,
- .iova_to_phys = intel_iommu_iova_to_phys,
- .add_device = intel_iommu_add_device,
- .remove_device = intel_iommu_remove_device,
- .device_group = pci_device_group,
- .pgsize_bitmap = INTEL_IOMMU_PGSIZES,
+ .capable = intel_iommu_capable,
+ .domain_alloc = intel_iommu_domain_alloc,
+ .domain_free = intel_iommu_domain_free,
+ .attach_dev = intel_iommu_attach_device,
+ .detach_dev = intel_iommu_detach_device,
+ .map = intel_iommu_map,
+ .unmap = intel_iommu_unmap,
+ .map_sg = default_iommu_map_sg,
+ .iova_to_phys = intel_iommu_iova_to_phys,
+ .add_device = intel_iommu_add_device,
+ .remove_device = intel_iommu_remove_device,
+ .get_resv_regions = intel_iommu_get_resv_regions,
+ .put_resv_regions = intel_iommu_put_resv_regions,
+ .device_group = pci_device_group,
+ .pgsize_bitmap = INTEL_IOMMU_PGSIZES,
};
static void quirk_iommu_g4x_gfx(struct pci_dev *dev)
--
1.9.1
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[RFC v3 00/10] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA reserved regions Eric Auger <eric.auger@redhat.com> - 2016-11-15 14:10 +0100 [RFC v3 02/10] iommu: Rename iommu_dm_regions into iommu_resv_regions Eric Auger <eric.auger@redhat.com> - 2016-11-15 14:10 +0100 [RFC v3 01/10] iommu/dma: Allow MSI-only cookies Eric Auger <eric.auger@redhat.com> - 2016-11-15 14:10 +0100 [RFC v3 05/10] iommu: Do not map reserved regions Eric Auger <eric.auger@redhat.com> - 2016-11-15 14:20 +0100 [RFC v3 08/10] iommu/vt-d: Implement reserved region get/put callbacks Eric Auger <eric.auger@redhat.com> - 2016-11-15 14:20 +0100 [RFC v3 10/10] vfio/type1: Get MSI cookie Eric Auger <eric.auger@redhat.com> - 2016-11-15 14:20 +0100 [RFC v3 09/10] iommu/arm-smmu: Implement reserved region get/put callbacks Eric Auger <eric.auger@redhat.com> - 2016-11-15 14:20 +0100 [RFC v3 03/10] iommu: Add new reserved IOMMU attributes Eric Auger <eric.auger@redhat.com> - 2016-11-15 14:20 +0100 [RFC v3 06/10] iommu: iommu_get_group_resv_regions Eric Auger <eric.auger@redhat.com> - 2016-11-15 14:20 +0100 [RFC v3 07/10] iommu: Implement reserved_regions iommu-group sysfs file Eric Auger <eric.auger@redhat.com> - 2016-11-15 14:20 +0100 [RFC v3 04/10] iommu: iommu_alloc_resv_region Eric Auger <eric.auger@redhat.com> - 2016-11-15 14:20 +0100 Re: [RFC v3 00/10] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA reserved regions Auger Eric <eric.auger@redhat.com> - 2016-11-18 09:40 +0100 RE: [RFC v3 00/10] KVM PCIe/MSI passthrough on ARM/ARM64 and IOVA reserved regions Bharat Bhushan <bharat.bhushan@nxp.com> - 2016-11-18 11:10 +0100
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