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Commit e01d1913 authored by Baoquan He's avatar Baoquan He Committed by Joerg Roedel
Browse files

iommu: Add is_attach_deferred call-back to iommu-ops 



This new call-back will be used to check if the domain attach need be
deferred for now. If yes, the domain attach/detach will return directly.

Signed-off-by: default avatarBaoquan He <bhe@redhat.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 53019a9e

drivers/iommu/iommu.c

+8 −0
Original line number Diff line number Diff line
@@ -1283,6 +1283,10 @@ static int __iommu_attach_device(struct iommu_domain *domain, 
				 struct device *dev)

{

	int ret;

	if ((domain->ops->is_attach_deferred != NULL) &&

	    domain->ops->is_attach_deferred(domain, dev))

		return 0;



	if (unlikely(domain->ops->attach_dev == NULL))

		return -ENODEV;
@@ -1324,6 +1328,10 @@ EXPORT_SYMBOL_GPL(iommu_attach_device); 
static void __iommu_detach_device(struct iommu_domain *domain,

				  struct device *dev)

{

	if ((domain->ops->is_attach_deferred != NULL) &&

	    domain->ops->is_attach_deferred(domain, dev))

		return;



	if (unlikely(domain->ops->detach_dev == NULL))

		return;

include/linux/iommu.h

+1 −0
Original line number Diff line number Diff line
@@ -225,6 +225,7 @@ struct iommu_ops { 
	u32 (*domain_get_windows)(struct iommu_domain *domain);



	int (*of_xlate)(struct device *dev, struct of_phandle_args *args);

	bool (*is_attach_deferred)(struct iommu_domain *domain, struct device *dev);



	unsigned long pgsize_bitmap;

};