From: Xiang Chen <[email protected]> When rmmod the driver of the last device in the domain, cached iovas are not used and it is better to free them to save memories.
Signed-off-by: Xiang Chen <[email protected]> --- drivers/iommu/iommu.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/iommu/iommu.c b/drivers/iommu/iommu.c index 808ab70..d318d80 100644 --- a/drivers/iommu/iommu.c +++ b/drivers/iommu/iommu.c @@ -9,6 +9,7 @@ #include <linux/device.h> #include <linux/kernel.h> #include <linux/bug.h> +#include <linux/dma-iommu.h> #include <linux/types.h> #include <linux/init.h> #include <linux/export.h> @@ -16,6 +17,7 @@ #include <linux/errno.h> #include <linux/iommu.h> #include <linux/idr.h> +#include <linux/iova.h> #include <linux/notifier.h> #include <linux/err.h> #include <linux/pci.h> @@ -1667,6 +1669,11 @@ static int iommu_bus_notifier(struct notifier_block *nb, group_action = IOMMU_GROUP_NOTIFY_UNBIND_DRIVER; break; case BUS_NOTIFY_UNBOUND_DRIVER: + if (iommu_group_device_count(group) == 1) { + struct iommu_domain *domain = group->domain; + + free_rcache_cached_iovas(iommu_domain_to_iova(domain)); + } group_action = IOMMU_GROUP_NOTIFY_UNBOUND_DRIVER; break; } -- 2.8.1 _______________________________________________ iommu mailing list [email protected] https://lists.linuxfoundation.org/mailman/listinfo/iommu
