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iommu/vt-d: Add set_dev_pasid callback for nested domain

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Add intel_nested_set_dev_pasid() to set a nested type domain to a PASID
of a device.

Co-developed-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20241107122234.7424-12-yi.l.liu@intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Yi Liu 2024-11-08 10:14:02 +08:00 committed by Joerg Roedel
parent 9bc18d283d
commit 67f6f56b59
3 changed files with 57 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/iommu/intel/iommu.c
View File

@ -1812,12 +1812,6 @@ static int domain_setup_first_level(struct intel_iommu *iommu,
(pgd_t *)pgd, flags, old); (pgd_t *)pgd, flags, old);
} }
static bool dev_is_real_dma_subdevice(struct device *dev)
{
return dev && dev_is_pci(dev) &&
pci_real_dma_dev(to_pci_dev(dev)) != to_pci_dev(dev);
}
static int dmar_domain_attach_device(struct dmar_domain *domain, static int dmar_domain_attach_device(struct dmar_domain *domain,
struct device *dev) struct device *dev)
{ {

7
drivers/iommu/intel/iommu.h
View File

@ -22,6 +22,7 @@
#include <linux/bitfield.h> #include <linux/bitfield.h>
#include <linux/xarray.h> #include <linux/xarray.h>
#include <linux/perf_event.h> #include <linux/perf_event.h>
#include <linux/pci.h>
#include <asm/cacheflush.h> #include <asm/cacheflush.h>
#include <asm/iommu.h> #include <asm/iommu.h>
@ -832,6 +833,12 @@ iommu_domain_did(struct iommu_domain *domain, struct intel_iommu *iommu)
return domain_id_iommu(to_dmar_domain(domain), iommu); return domain_id_iommu(to_dmar_domain(domain), iommu);
} }
static inline bool dev_is_real_dma_subdevice(struct device *dev)
{
return dev && dev_is_pci(dev) &&
pci_real_dma_dev(to_pci_dev(dev)) != to_pci_dev(dev);
}
/* /*
* 0: readable * 0: readable
* 1: writable * 1: writable

50
drivers/iommu/intel/nested.c
View File

@ -130,8 +130,58 @@ static int intel_nested_cache_invalidate_user(struct iommu_domain *domain,
return ret; return ret;
} }
static int domain_setup_nested(struct intel_iommu *iommu,
struct dmar_domain *domain,
struct device *dev, ioasid_t pasid,
struct iommu_domain *old)
{
if (!old)
return intel_pasid_setup_nested(iommu, dev, pasid, domain);
return intel_pasid_replace_nested(iommu, dev, pasid,
iommu_domain_did(old, iommu),
domain);
}
static int intel_nested_set_dev_pasid(struct iommu_domain *domain,
struct device *dev, ioasid_t pasid,
struct iommu_domain *old)
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct dmar_domain *dmar_domain = to_dmar_domain(domain);
struct intel_iommu *iommu = info->iommu;
struct dev_pasid_info *dev_pasid;
int ret;
if (!pasid_supported(iommu) || dev_is_real_dma_subdevice(dev))
return -EOPNOTSUPP;
if (context_copied(iommu, info->bus, info->devfn))
return -EBUSY;
ret = paging_domain_compatible(&dmar_domain->s2_domain->domain, dev);
if (ret)
return ret;
dev_pasid = domain_add_dev_pasid(domain, dev, pasid);
if (IS_ERR(dev_pasid))
return PTR_ERR(dev_pasid);
ret = domain_setup_nested(iommu, dmar_domain, dev, pasid, old);
if (ret)
goto out_remove_dev_pasid;
domain_remove_dev_pasid(old, dev, pasid);
return 0;
out_remove_dev_pasid:
domain_remove_dev_pasid(domain, dev, pasid);
return ret;
}
static const struct iommu_domain_ops intel_nested_domain_ops = { static const struct iommu_domain_ops intel_nested_domain_ops = {
.attach_dev = intel_nested_attach_dev, .attach_dev = intel_nested_attach_dev,
.set_dev_pasid = intel_nested_set_dev_pasid,
.free = intel_nested_domain_free, .free = intel_nested_domain_free,
.cache_invalidate_user = intel_nested_cache_invalidate_user, .cache_invalidate_user = intel_nested_cache_invalidate_user,
}; };