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iommu: Add IOMMU index argument to notifier APIs

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Add support for multiple IOMMU indexes to the IOMMU notifier APIs.
When initializing a notifier with iommu_notifier_init(), the caller
must pass the IOMMU index that it is interested in. When a change
happens, the IOMMU implementation must pass
memory_region_notify_iommu() the IOMMU index that has changed and
that notifiers must be called for.

IOMMUs which support only a single index don't need to change.
Callers which only really support working with IOMMUs with a single
index can use the result of passing MEMTXATTRS_UNSPECIFIED to
memory_region_iommu_attrs_to_index().

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 20180604152941.20374-3-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2018-06-15 14:57:16 +01:00
parent 21f402093c
commit cb1efcf462
7 changed files with 30 additions and 10 deletions
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7
include/exec/memory.h
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@ -98,18 +98,21 @@ struct IOMMUNotifier {
/* Notify for address space range start <= addr <= end */
hwaddr start;
hwaddr end;
int iommu_idx;
QLIST_ENTRY(IOMMUNotifier) node;
};
typedef struct IOMMUNotifier IOMMUNotifier;
static inline void iommu_notifier_init(IOMMUNotifier *n, IOMMUNotify fn,
IOMMUNotifierFlag flags,
hwaddr start, hwaddr end)
hwaddr start, hwaddr end,
int iommu_idx)
{
n->notify = fn;
n->notifier_flags = flags;
n->start = start;
n->end = end;
n->iommu_idx = iommu_idx;
}
/*
@ -1008,11 +1011,13 @@ uint64_t memory_region_iommu_get_min_page_size(IOMMUMemoryRegion *iommu_mr);
* should be notified with an UNMAP followed by a MAP.
*
* @iommu_mr: the memory region that was changed
* @iommu_idx: the IOMMU index for the translation table which has changed
* @entry: the new entry in the IOMMU translation table. The entry
* replaces all old entries for the same virtual I/O address range.
* Deleted entries have .@perm == 0.
*/
void memory_region_notify_iommu(IOMMUMemoryRegion *iommu_mr,
int iommu_idx,
IOMMUTLBEntry entry);
/**