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iommu/vt-d: Move common code out of iommu_attch_device() 

This part of code could be used by both normal and aux
domain specific attach entries. Hence move them into a
common function to avoid duplication.

Cc: Ashok Raj <ashok.raj@intel.com>
Cc: Jacob Pan <jacob.jun.pan@linux.intel.com>
Cc: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2019-03-25 09:30:31 +08:00 committed by Joerg Roedel
parent 95587a75de
commit 8cc3759a6c
1 changed files with 36 additions and 24 deletions
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60
drivers/iommu/intel-iommu.c
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@ -5066,35 +5066,14 @@ static void intel_iommu_domain_free(struct iommu_domain *domain)
domain_exit(to_dmar_domain(domain));
}
static int intel_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
static int prepare_domain_attach_device(struct iommu_domain *domain,
struct device *dev)
{
struct dmar_domain *dmar_domain = to_dmar_domain(domain);
struct intel_iommu *iommu;
int addr_width;
u8 bus, devfn;
if (device_is_rmrr_locked(dev)) {
dev_warn(dev, "Device is ineligible for IOMMU domain attach due to platform RMRR requirement. Contact your platform vendor.\n");
return -EPERM;
}
/* normally dev is not mapped */
if (unlikely(domain_context_mapped(dev))) {
struct dmar_domain *old_domain;
old_domain = find_domain(dev);
if (old_domain) {
rcu_read_lock();
dmar_remove_one_dev_info(dev);
rcu_read_unlock();
if (!domain_type_is_vm_or_si(old_domain) &&
list_empty(&old_domain->devices))
domain_exit(old_domain);
}
}
iommu = device_to_iommu(dev, &bus, &devfn);
if (!iommu)
return -ENODEV;
@ -5127,7 +5106,40 @@ static int intel_iommu_attach_device(struct iommu_domain *domain,
dmar_domain->agaw--;
}
return domain_add_dev_info(dmar_domain, dev);
return 0;
}
static int intel_iommu_attach_device(struct iommu_domain *domain,
struct device *dev)
{
int ret;
if (device_is_rmrr_locked(dev)) {
dev_warn(dev, "Device is ineligible for IOMMU domain attach due to platform RMRR requirement. Contact your platform vendor.\n");
return -EPERM;
}
/* normally dev is not mapped */
if (unlikely(domain_context_mapped(dev))) {
struct dmar_domain *old_domain;
old_domain = find_domain(dev);
if (old_domain) {
rcu_read_lock();
dmar_remove_one_dev_info(dev);
rcu_read_unlock();
if (!domain_type_is_vm_or_si(old_domain) &&
list_empty(&old_domain->devices))
domain_exit(old_domain);
}
}
ret = prepare_domain_attach_device(domain, dev);
if (ret)
return ret;
return domain_add_dev_info(to_dmar_domain(domain), dev);
}
static void intel_iommu_detach_device(struct iommu_domain *domain,