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iommu/amd: Set alias DTE in do_attach/do_detach 

With this we don't have to create dev_data entries for
non-existent devices (which only exist as request-ids).

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-10-20 17:33:38 +02:00
parent 272e4f99e9
commit e25bfb56ea
1 changed files with 15 additions and 2 deletions
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17
drivers/iommu/amd_iommu.c
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@ -1114,11 +1114,15 @@ static int device_flush_iotlb(struct iommu_dev_data *dev_data,
static int device_flush_dte(struct iommu_dev_data *dev_data)
{
struct amd_iommu *iommu;
u16 alias;
int ret;
iommu = amd_iommu_rlookup_table[dev_data->devid];
alias = amd_iommu_alias_table[dev_data->devid];
ret = iommu_flush_dte(iommu, dev_data->devid);
if (!ret && alias != dev_data->devid)
ret = iommu_flush_dte(iommu, alias);
if (ret)
return ret;
@ -1984,29 +1988,36 @@ static void do_attach(struct iommu_dev_data *dev_data,
struct protection_domain *domain)
{
struct amd_iommu *iommu;
u16 alias;
bool ats;
iommu = amd_iommu_rlookup_table[dev_data->devid];
alias = amd_iommu_alias_table[dev_data->devid];
ats = dev_data->ats.enabled;
/* Update data structures */
dev_data->domain = domain;
list_add(&dev_data->list, &domain->dev_list);
set_dte_entry(dev_data->devid, domain, ats);
/* Do reference counting */
domain->dev_iommu[iommu->index] += 1;
domain->dev_cnt += 1;
/* Flush the DTE entry */
/* Update device table */
set_dte_entry(dev_data->devid, domain, ats);
if (alias != dev_data->devid)
set_dte_entry(dev_data->devid, domain, ats);
device_flush_dte(dev_data);
}
static void do_detach(struct iommu_dev_data *dev_data)
{
struct amd_iommu *iommu;
u16 alias;
iommu = amd_iommu_rlookup_table[dev_data->devid];
alias = amd_iommu_alias_table[dev_data->devid];
/* decrease reference counters */
dev_data->domain->dev_iommu[iommu->index] -= 1;
@ -2016,6 +2027,8 @@ static void do_detach(struct iommu_dev_data *dev_data)
dev_data->domain = NULL;
list_del(&dev_data->list);
clear_dte_entry(dev_data->devid);
if (alias != dev_data->devid)
clear_dte_entry(alias);
/* Flush the DTE entry */
device_flush_dte(dev_data);