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author | Alexey Kardashevskiy <aik@ozlabs.ru> | 2018-12-19 11:52:15 +0300 |
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committer | Michael Ellerman <mpe@ellerman.id.au> | 2018-12-21 08:20:46 +0300 |
commit | c10c21efa4bccab486c2e6a047c13dfa6cf7426c (patch) | |
tree | cd4df28268ab37a3d2aef950b70f8a8a1ffd6388 /arch/powerpc/include/asm/iommu.h | |
parent | e0bf78b0f9594d47dfa7e364a9071442fc1d9445 (diff) | |
download | linux-c10c21efa4bccab486c2e6a047c13dfa6cf7426c.tar.xz |
powerpc/vfio/iommu/kvm: Do not pin device memory
This new memory does not have page structs as it is not plugged to
the host so gup() will fail anyway.
This adds 2 helpers:
- mm_iommu_newdev() to preregister the "memory device" memory so
the rest of API can still be used;
- mm_iommu_is_devmem() to know if the physical address is one of thise
new regions which we must avoid unpinning of.
This adds @mm to tce_page_is_contained() and iommu_tce_xchg() to test
if the memory is device memory to avoid pfn_to_page().
This adds a check for device memory in mm_iommu_ua_mark_dirty_rm() which
does delayed pages dirtying.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include/asm/iommu.h')
-rw-r--r-- | arch/powerpc/include/asm/iommu.h | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/iommu.h b/arch/powerpc/include/asm/iommu.h index 35db0cbc9222..a8aeac0db01c 100644 --- a/arch/powerpc/include/asm/iommu.h +++ b/arch/powerpc/include/asm/iommu.h @@ -218,8 +218,9 @@ extern void iommu_register_group(struct iommu_table_group *table_group, extern int iommu_add_device(struct device *dev); extern void iommu_del_device(struct device *dev); extern int __init tce_iommu_bus_notifier_init(void); -extern long iommu_tce_xchg(struct iommu_table *tbl, unsigned long entry, - unsigned long *hpa, enum dma_data_direction *direction); +extern long iommu_tce_xchg(struct mm_struct *mm, struct iommu_table *tbl, + unsigned long entry, unsigned long *hpa, + enum dma_data_direction *direction); #else static inline void iommu_register_group(struct iommu_table_group *table_group, int pci_domain_number, |