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iommu/vt-d: Create RMRR mappings in newly allocated domains 

Currently the RMRR entries are created only at boot time.
This means they will vanish when the domain allocated at
boot time is destroyed.
This patch makes sure that also newly allocated domains will
get RMRR mappings.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2015-09-23 19:16:01 +02:00
parent d66ce54b46
commit b1ce5b79ae
1 changed files with 20 additions and 0 deletions
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20
drivers/iommu/intel-iommu.c
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@ -3241,7 +3241,10 @@ static struct iova *intel_alloc_iova(struct device *dev,
static struct dmar_domain *__get_valid_domain_for_dev(struct device *dev)
{
struct dmar_rmrr_unit *rmrr;
struct dmar_domain *domain;
struct device *i_dev;
int i, ret;
domain = get_domain_for_dev(dev, DEFAULT_DOMAIN_ADDRESS_WIDTH);
if (!domain) {
@ -3250,6 +3253,23 @@ static struct dmar_domain *__get_valid_domain_for_dev(struct device *dev)
return NULL;
}
/* We have a new domain - setup possible RMRRs for the device */
rcu_read_lock();
for_each_rmrr_units(rmrr) {
for_each_active_dev_scope(rmrr->devices, rmrr->devices_cnt,
i, i_dev) {
if (i_dev != dev)
continue;
ret = domain_prepare_identity_map(dev, domain,
rmrr->base_address,
rmrr->end_address);
if (ret)
dev_err(dev, "Mapping reserved region failed\n");
}
}
rcu_read_unlock();
return domain;
}