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Tsirkin" , Eric Auger , qemu-arm@nongnu.org, =?utf-8?q?Herv=C3=A9_Poussineau?= , Avi Kivity , Paolo Bonzini , Richard Henderson Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" Signed-off-by: Eugenio Pérez --- softmmu/memory.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/softmmu/memory.c b/softmmu/memory.c index 4ed63f4d0d..d2797e996a 100644 --- a/softmmu/memory.c +++ b/softmmu/memory.c @@ -1915,6 +1915,7 @@ void memory_region_notify_iommu_one(IOMMUNotifier *notifier, IOMMUTLBEntry *entry) { hwaddr entry_end = entry->iova + entry->addr_mask; + IOMMUTLBEntry tmp = *entry; /* * Skip the notification if the notification does not overlap @@ -1924,10 +1925,18 @@ void memory_region_notify_iommu_one(IOMMUNotifier *notifier, return; } - assert(entry->iova >= notifier->start && entry_end <= notifier->end); + if (notifier->notifier_flags & IOMMU_NOTIFIER_DEVIOTLB) { + /* Crop (iova, addr_mask) to range */ + tmp.iova = MAX(tmp.iova, notifier->start); + tmp.addr_mask = MIN(entry_end, notifier->end) - tmp.iova; + /* Confirm no underflow */ + assert(MIN(entry_end, notifier->end) >= tmp.iova); + } else { + assert(entry->iova >= notifier->start && entry_end <= notifier->end); + } if (memory_region_notify(notifier, entry)) { - notifier->notify(notifier, entry); + notifier->notify(notifier, &tmp); } }