lk/linux-kernel-test
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

x86/amd-iommu: Keep devices per domain in a list

Browse Source 
This patch introduces a list to each protection domain which
keeps all devices associated with the domain. This can be
used later to optimize certain functions and to completly
remove the amd_iommu_pd_table.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel
2009-11-26 11:13:32 +01:00
parent 241000556f
commit 7c392cbe98
2 changed files with 13 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

11
arch/x86/kernel/amd_iommu.c
View File

@@ -1286,6 +1286,7 @@ static struct dma_ops_domain *dma_ops_domain_alloc(void)
dma_dom->domain.id = domain_id_alloc();
if (dma_dom->domain.id == 0)
goto free_dma_dom;
INIT_LIST_HEAD(&dma_dom->domain.dev_list);
dma_dom->domain.mode = PAGE_MODE_2_LEVEL;
dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL);
dma_dom->domain.flags = PD_DMA_OPS_MASK;
@@ -1408,6 +1409,7 @@ static int __attach_device(struct device *dev,
if (alias != devid) {
if (alias_data->domain == NULL) {
alias_data->domain = domain;
list_add(&alias_data->list, &domain->dev_list);
set_dte_entry(alias, domain);
}
@@ -1416,6 +1418,7 @@ static int __attach_device(struct device *dev,
if (dev_data->domain == NULL) {
dev_data->domain = domain;
list_add(&dev_data->list, &domain->dev_list);
set_dte_entry(devid, domain);
}
@@ -1460,6 +1463,7 @@ static void __detach_device(struct device *dev)
struct amd_iommu *iommu = amd_iommu_rlookup_table[devid];
struct iommu_dev_data *dev_data = get_dev_data(dev);
struct iommu_dev_data *alias_data;
unsigned long flags;
BUG_ON(!iommu);
@@ -1469,13 +1473,19 @@ static void __detach_device(struct device *dev)
if (devid != alias) {
alias_data = get_dev_data(dev_data->alias);
if (atomic_dec_and_test(&alias_data->bind)) {
spin_lock_irqsave(&alias_data->domain->lock, flags);
clear_dte_entry(alias);
list_del(&alias_data->list);
spin_unlock_irqrestore(&alias_data->domain->lock, flags);
alias_data->domain = NULL;
}
}
if (atomic_dec_and_test(&dev_data->bind)) {
spin_lock_irqsave(&dev_data->domain->lock, flags);
clear_dte_entry(devid);
list_del(&dev_data->list);
spin_unlock_irqrestore(&dev_data->domain->lock, flags);
dev_data->domain = NULL;
}
@@ -2294,6 +2304,7 @@ static struct protection_domain *protection_domain_alloc(void)
domain->id = domain_id_alloc();
if (!domain->id)
goto out_err;
INIT_LIST_HEAD(&domain->dev_list);
add_domain_to_list(domain);