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iommu: remove DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE

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Instead make the global iommu_dma_strict paramete in iommu.c canonical by
exporting helpers to get and set it and use those directly in the drivers.

This make sure that the iommu.strict parameter also works for the AMD and
Intel IOMMU drivers on x86.  As those default to lazy flushing a new
IOMMU_CMD_LINE_STRICT is used to turn the value into a tristate to
represent the default if not overriden by an explicit parameter.

[ported on top of the other iommu_attr changes and added a few small
 missing bits]

Signed-off-by: Robin Murphy <robin.murphy@arm.com>.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Link: https://lore.kernel.org/r/20210401155256.298656-19-hch@lst.de
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Robin Murphy
2021-04-01 17:52:54 +02:00
committed by Joerg Roedel
parent 3189713a1b
commit a250c23f15
8 changed files with 43 additions and 165 deletions
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4
include/linux/iommu.h
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@@ -107,7 +107,6 @@ enum iommu_cap {
*/
enum iommu_attr {
DOMAIN_ATTR_DMA_USE_FLUSH_QUEUE,
DOMAIN_ATTR_IO_PGTABLE_CFG,
DOMAIN_ATTR_MAX,
};
@@ -514,6 +513,9 @@ extern int iommu_domain_set_attr(struct iommu_domain *domain, enum iommu_attr,
void *data);
int iommu_enable_nesting(struct iommu_domain *domain);
void iommu_set_dma_strict(bool val);
bool iommu_get_dma_strict(struct iommu_domain *domain);
extern int report_iommu_fault(struct iommu_domain *domain, struct device *dev,
unsigned long iova, int flags);