[PATCH 1/4] iommu/iova: add a function to free all rcached iovas and export it

[chenxiang <chenxiang66@hisilicon.com>]

From: Xiang Chen <chenxiang66@hisilicon.com>

Add a function to free all rcached iovas including cpu rcache iovas and
global rcache iovas, and export it.

Signed-off-by: Xiang Chen <chenxiang66@hisilicon.com>
---
 drivers/iommu/iova.c | 11 +++++++++++
 include/linux/iova.h |  5 +++++
 2 files changed, 16 insertions(+)

diff --git a/drivers/iommu/iova.c b/drivers/iommu/iova.c
index b7ecd5b..f595867 100644
--- a/drivers/iommu/iova.c
+++ b/drivers/iommu/iova.c
@@ -1077,5 +1077,16 @@ static void free_global_cached_iovas(struct iova_domain *iovad)
 		spin_unlock_irqrestore(&rcache->lock, flags);
 	}
 }
+
+void free_rcache_cached_iovas(struct iova_domain *iovad)
+{
+	unsigned int cpu;
+
+	for_each_online_cpu(cpu)
+		free_cpu_cached_iovas(cpu, iovad);
+	free_global_cached_iovas(iovad);
+}
+EXPORT_SYMBOL_GPL(free_rcache_cached_iovas);
+
 MODULE_AUTHOR("Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>");
 MODULE_LICENSE("GPL");
diff --git a/include/linux/iova.h b/include/linux/iova.h
index 71d8a2d..7006d9f 100644
--- a/include/linux/iova.h
+++ b/include/linux/iova.h
@@ -157,6 +157,7 @@ int init_iova_flush_queue(struct iova_domain *iovad,
 			  iova_flush_cb flush_cb, iova_entry_dtor entry_dtor);
 struct iova *find_iova(struct iova_domain *iovad, unsigned long pfn);
 void put_iova_domain(struct iova_domain *iovad);
+void free_rcache_cached_iovas(struct iova_domain *iovad);
 #else
 static inline int iova_cache_get(void)
 {
@@ -233,6 +234,10 @@ static inline void put_iova_domain(struct iova_domain *iovad)
 {
 }
 
+static inline void free_rcache_cached_iovas(struct iova_domain *iovad)
+{
+}
+
 #endif
 
 #endif
-- 
2.8.1

_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu