This function will be used to coalesce cache-flushes required after a domain was changed. This should significantly improve performance in some cases.
Signed-off-by: Joerg Roedel <[email protected]> --- drivers/iommu/iommu.c | 7 +++++++ include/linux/iommu.h | 6 ++++++ 2 files changed, 13 insertions(+), 0 deletions(-) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 6e6b6a1..4099cc6 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -122,3 +122,10 @@ int iommu_unmap(struct iommu_domain *domain, unsigned long iova, int gfp_order) return iommu_ops->unmap(domain, iova, gfp_order); } EXPORT_SYMBOL_GPL(iommu_unmap); + +void iommu_commit(struct iommu_domain *domain) +{ + if (iommu_ops->commit) + iommu_ops->commit(domain); +} +EXPORT_SYMBOL_GPL(iommu_commit); diff --git a/include/linux/iommu.h b/include/linux/iommu.h index 9940319..dbb4324 100644 --- a/include/linux/iommu.h +++ b/include/linux/iommu.h @@ -47,6 +47,7 @@ struct iommu_ops { unsigned long iova); int (*domain_has_cap)(struct iommu_domain *domain, unsigned long cap); + void (*commit)(struct iommu_domain *domain); }; #ifdef CONFIG_IOMMU_API @@ -67,6 +68,7 @@ extern phys_addr_t iommu_iova_to_phys(struct iommu_domain *domain, unsigned long iova); extern int iommu_domain_has_cap(struct iommu_domain *domain, unsigned long cap); +extern void iommu_commit(struct iommu_domain *domain); #else /* CONFIG_IOMMU_API */ @@ -123,6 +125,10 @@ static inline int domain_has_cap(struct iommu_domain *domain, return 0; } +static inline void iommu_commit(struct iommu_domain *domain) +{ +} + #endif /* CONFIG_IOMMU_API */ #endif /* __LINUX_IOMMU_H */ -- 1.7.4.1 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
