Proxmox-Port/linux-loongson
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson synced 2025-08-28 09:22:08 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

iommu: Remove useless flush from iommu_create_device_direct_mappings()

Browse Source 
These days iommu_map() does not require external flushing, it always
internally handles any required flushes. Since
iommu_create_device_direct_mappings() only calls iommu_map(), remove
the extra call.

Since this is the last call site for iommu_flush_iotlb_all() remove it
too.

Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/0-v1-bb6c694e1b07+a29e1-iommu_no_flush_all_jgg@nvidia.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jason Gunthorpe 2024-10-18 14:01:19 -03:00 committed by Joerg Roedel
parent a2f528e914
commit 69e5a17511
2 changed files with 0 additions and 14 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
drivers/iommu/iommu.c
View File

@ -1141,10 +1141,6 @@ static int iommu_create_device_direct_mappings(struct iommu_domain *domain,
} }
} }
if (!list_empty(&mappings) && iommu_is_dma_domain(domain))
iommu_flush_iotlb_all(domain);
out: out:
iommu_put_resv_regions(dev, &mappings); iommu_put_resv_regions(dev, &mappings);

10
include/linux/iommu.h
View File

@ -852,12 +852,6 @@ void iommu_set_dma_strict(void);
extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev, extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
unsigned long iova, int flags); unsigned long iova, int flags);
static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
{
if (domain->ops->flush_iotlb_all)
domain->ops->flush_iotlb_all(domain);
}
static inline void iommu_iotlb_sync(struct iommu_domain *domain, static inline void iommu_iotlb_sync(struct iommu_domain *domain,
struct iommu_iotlb_gather *iotlb_gather) struct iommu_iotlb_gather *iotlb_gather)
{ {
@ -1141,10 +1135,6 @@ static inline ssize_t iommu_map_sg(struct iommu_domain *domain,
return -ENODEV; return -ENODEV;
} }
static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
{
}
static inline void iommu_iotlb_sync(struct iommu_domain *domain, static inline void iommu_iotlb_sync(struct iommu_domain *domain,
struct iommu_iotlb_gather *iotlb_gather) struct iommu_iotlb_gather *iotlb_gather)
{ {