On 6/30/22 4:28 PM, Tian, Kevin wrote:
From: Lu Baolu
Sent: Saturday, June 25, 2022 8:52 PM
+struct iommu_domain_info {
+ struct intel_iommu *iommu;
+ unsigned int refcnt;
+ u16 did;
+};
+
struct dmar_domain {
int nid;/* node id */
-
-
> From: Lu Baolu
> Sent: Saturday, June 25, 2022 8:52 PM
>
> +struct iommu_domain_info {
> + struct intel_iommu *iommu;
> + unsigned int refcnt;
> + u16 did;
> +};
> +
> struct dmar_domain {
> int nid;/* node id */
> -
> - unsigned int
When a DMA domain is attached to a device, it needs to allocate a domain
ID from its IOMMU. Currently, the domain ID information is stored in two
static arrays embedded in the domain structure. This can lead to memory
waste when the driver is running on a small platform.
This optimizes these
