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iommu: Restore iommu_flush_iotlb_all()

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This patch restores the iommu_flush_iotlb_all() function.
Commit

	69e5a17511 ("iommu: Remove useless flush from iommu_create_device_direct_mappings()")

claims it removed the last call-site, except it did not. There is still
at least one caller in

	drivers/gpu/drm/msm/msm_iommu.c

so keep the function around until all call-sites are updated.

Cc: Jason Gunthorpe <jgg@ziepe.ca>
Fixes: 69e5a17511 ("iommu: Remove useless flush from iommu_create_device_direct_mappings()")
Acked-by: Will Deacon <will@kernel.org>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2024-10-29 12:11:49 +01:00
parent d14772c0d8
commit a33bf8d8ce
1 changed files with 10 additions and 0 deletions
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10
include/linux/iommu.h
View File

@ -853,6 +853,12 @@ void iommu_set_dma_strict(void);
extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
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,
struct iommu_iotlb_gather *iotlb_gather)
{
@ -1137,6 +1143,10 @@ static inline ssize_t iommu_map_sg(struct iommu_domain *domain,
return -ENODEV;
}
static inline void iommu_flush_iotlb_all(struct iommu_domain *domain)
{
}
static inline void iommu_iotlb_sync(struct iommu_domain *domain,
struct iommu_iotlb_gather *iotlb_gather)
{