diff options
| author | Lu Baolu <baolu.lu@linux.intel.com> | 2024-09-02 10:27:23 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-09-02 18:15:02 +0200 |
| commit | 777cdd853434849cc98ef94787538b1eb9f492d9 (patch) | |
| tree | 0a844316be219a061d68e68607abbde7df192cf6 /drivers/iommu/intel/cache.c | |
| parent | 3297d047cd7f502ea7bd949fe070bf01c02aec3e (diff) | |
iommu/vt-d: Add qi_batch for dmar_domain
Introduces a qi_batch structure to hold batched cache invalidation
descriptors on a per-dmar_domain basis. A fixed-size descriptor
array is used for simplicity. The qi_batch is allocated when the
first cache tag is added to the domain and freed during
iommu_free_domain().
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Tina Zhang <tina.zhang@intel.com>
Link: https://lore.kernel.org/r/20240815065221.50328-4-tina.zhang@intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/intel/cache.c')
| -rw-r--r-- | drivers/iommu/intel/cache.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/iommu/intel/cache.c b/drivers/iommu/intel/cache.c index 08f7ce2c16c3..2e997d782beb 100644 --- a/drivers/iommu/intel/cache.c +++ b/drivers/iommu/intel/cache.c @@ -190,6 +190,13 @@ int cache_tag_assign_domain(struct dmar_domain *domain, u16 did = domain_get_id_for_dev(domain, dev); int ret; + /* domain->qi_bach will be freed in iommu_free_domain() path. */ + if (!domain->qi_batch) { + domain->qi_batch = kzalloc(sizeof(*domain->qi_batch), GFP_KERNEL); + if (!domain->qi_batch) + return -ENOMEM; + } + ret = __cache_tag_assign_domain(domain, did, dev, pasid); if (ret || domain->domain.type != IOMMU_DOMAIN_NESTED) return ret; |