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Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel/iommu.c39
1 files changed, 23 insertions, 16 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index b155c7af7d15..e3fe1a148187 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -515,8 +515,9 @@ static int domain_update_device_node(struct dmar_domain *domain)
{
struct device_domain_info *info;
int nid = NUMA_NO_NODE;
+ unsigned long flags;
- spin_lock(&domain->lock);
+ spin_lock_irqsave(&domain->lock, flags);
list_for_each_entry(info, &domain->devices, link) {
/*
* There could possibly be multiple device numa nodes as devices
@@ -528,7 +529,7 @@ static int domain_update_device_node(struct dmar_domain *domain)
if (nid != NUMA_NO_NODE)
break;
}
- spin_unlock(&domain->lock);
+ spin_unlock_irqrestore(&domain->lock, flags);
return nid;
}
@@ -1362,19 +1363,20 @@ iommu_support_dev_iotlb(struct dmar_domain *domain, struct intel_iommu *iommu,
u8 bus, u8 devfn)
{
struct device_domain_info *info;
+ unsigned long flags;
if (!iommu->qi)
return NULL;
- spin_lock(&domain->lock);
+ spin_lock_irqsave(&domain->lock, flags);
list_for_each_entry(info, &domain->devices, link) {
if (info->iommu == iommu && info->bus == bus &&
info->devfn == devfn) {
- spin_unlock(&domain->lock);
+ spin_unlock_irqrestore(&domain->lock, flags);
return info->ats_supported ? info : NULL;
}
}
- spin_unlock(&domain->lock);
+ spin_unlock_irqrestore(&domain->lock, flags);
return NULL;
}
@@ -1383,8 +1385,9 @@ static void domain_update_iotlb(struct dmar_domain *domain)
{
struct device_domain_info *info;
bool has_iotlb_device = false;
+ unsigned long flags;
- spin_lock(&domain->lock);
+ spin_lock_irqsave(&domain->lock, flags);
list_for_each_entry(info, &domain->devices, link) {
if (info->ats_enabled) {
has_iotlb_device = true;
@@ -1392,7 +1395,7 @@ static void domain_update_iotlb(struct dmar_domain *domain)
}
}
domain->has_iotlb_device = has_iotlb_device;
- spin_unlock(&domain->lock);
+ spin_unlock_irqrestore(&domain->lock, flags);
}
static void iommu_enable_dev_iotlb(struct device_domain_info *info)
@@ -1484,14 +1487,15 @@ static void iommu_flush_dev_iotlb(struct dmar_domain *domain,
u64 addr, unsigned mask)
{
struct device_domain_info *info;
+ unsigned long flags;
if (!domain->has_iotlb_device)
return;
- spin_lock(&domain->lock);
+ spin_lock_irqsave(&domain->lock, flags);
list_for_each_entry(info, &domain->devices, link)
__iommu_flush_dev_iotlb(info, addr, mask);
- spin_unlock(&domain->lock);
+ spin_unlock_irqrestore(&domain->lock, flags);
}
static void iommu_flush_iotlb_psi(struct intel_iommu *iommu,
@@ -2453,6 +2457,7 @@ static int domain_add_dev_info(struct dmar_domain *domain, struct device *dev)
{
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct intel_iommu *iommu;
+ unsigned long flags;
u8 bus, devfn;
int ret;
@@ -2464,9 +2469,9 @@ static int domain_add_dev_info(struct dmar_domain *domain, struct device *dev)
if (ret)
return ret;
info->domain = domain;
- spin_lock(&domain->lock);
+ spin_lock_irqsave(&domain->lock, flags);
list_add(&info->link, &domain->devices);
- spin_unlock(&domain->lock);
+ spin_unlock_irqrestore(&domain->lock, flags);
/* PASID table is mandatory for a PCI device in scalable mode. */
if (sm_supported(iommu) && !dev_is_real_dma_subdevice(dev)) {
@@ -4090,6 +4095,7 @@ static void dmar_remove_one_dev_info(struct device *dev)
struct device_domain_info *info = dev_iommu_priv_get(dev);
struct dmar_domain *domain = info->domain;
struct intel_iommu *iommu = info->iommu;
+ unsigned long flags;
if (!dev_is_real_dma_subdevice(info->dev)) {
if (dev_is_pci(info->dev) && sm_supported(iommu))
@@ -4101,9 +4107,9 @@ static void dmar_remove_one_dev_info(struct device *dev)
intel_pasid_free_table(info->dev);
}
- spin_lock(&domain->lock);
+ spin_lock_irqsave(&domain->lock, flags);
list_del(&info->link);
- spin_unlock(&domain->lock);
+ spin_unlock_irqrestore(&domain->lock, flags);
domain_detach_iommu(domain, iommu);
info->domain = NULL;
@@ -4422,19 +4428,20 @@ static void domain_set_force_snooping(struct dmar_domain *domain)
static bool intel_iommu_enforce_cache_coherency(struct iommu_domain *domain)
{
struct dmar_domain *dmar_domain = to_dmar_domain(domain);
+ unsigned long flags;
if (dmar_domain->force_snooping)
return true;
- spin_lock(&dmar_domain->lock);
+ spin_lock_irqsave(&dmar_domain->lock, flags);
if (!domain_support_force_snooping(dmar_domain)) {
- spin_unlock(&dmar_domain->lock);
+ spin_unlock_irqrestore(&dmar_domain->lock, flags);
return false;
}
domain_set_force_snooping(dmar_domain);
dmar_domain->force_snooping = true;
- spin_unlock(&dmar_domain->lock);
+ spin_unlock_irqrestore(&dmar_domain->lock, flags);
return true;
}