From: Alexey Kardashevskiy <aik@ozlabs.ru>
To: qemu-devel@nongnu.org
Cc: Alexey Kardashevskiy <aik@ozlabs.ru>,
Alex Williamson <alex.williamson@redhat.com>,
qemu-ppc@nongnu.org, Michael Roth <mdroth@linux.vnet.ibm.com>,
David Gibson <david@gibson.dropbear.id.au>
Subject: [Qemu-devel] [RFC PATCH qemu v2 2/5] vfio: Skip PCI BARs in memory listener
Date: Tue, 14 Jul 2015 00:56:18 +1000 [thread overview]
Message-ID: <1436799381-16150-3-git-send-email-aik@ozlabs.ru> (raw)
In-Reply-To: <1436799381-16150-1-git-send-email-aik@ozlabs.ru>
In some cases PCI BARs are registered as RAM via
memory_region_init_ram_ptr() and the vfio_memory_listener will be called
on them too. However DMA will not be performed to/from these regions so
just skip them.
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
---
hw/vfio/common.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/hw/vfio/common.c b/hw/vfio/common.c
index d115ec9..225cdc7 100644
--- a/hw/vfio/common.c
+++ b/hw/vfio/common.c
@@ -248,7 +248,8 @@ static bool vfio_listener_skipped_section(MemoryRegionSection *section)
* are never accessed by the CPU and beyond the address width of
* some IOMMU hardware. TODO: VFIO should tell us the IOMMU width.
*/
- section->offset_within_address_space & (1ULL << 63);
+ section->offset_within_address_space & (1ULL << 63) ||
+ memory_region_is_skip_dump(section->mr);
}
static void vfio_iommu_map_notify(Notifier *n, void *data)
--
2.4.0.rc3.8.gfb3e7d5
next prev parent reply other threads:[~2015-07-13 15:08 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-13 14:56 [Qemu-devel] [RFC PATCH qemu v2 0/5] vfio: SPAPR IOMMU v2 (memory preregistration support) Alexey Kardashevskiy
2015-07-13 14:56 ` [Qemu-devel] [RFC PATCH qemu v2 1/5] vfio: Switch from TARGET_PAGE_MASK to qemu_real_host_page_mask Alexey Kardashevskiy
2015-07-13 19:13 ` Alex Williamson
2015-07-14 6:58 ` Alexey Kardashevskiy
2015-07-14 12:17 ` Alexey Kardashevskiy
2015-07-14 22:28 ` Alex Williamson
2015-07-15 0:49 ` Alexey Kardashevskiy
2015-07-13 14:56 ` Alexey Kardashevskiy [this message]
2015-07-13 14:56 ` [Qemu-devel] [RFC PATCH qemu v2 3/5] vfio: Store IOMMU type in container Alexey Kardashevskiy
2015-07-13 14:56 ` [Qemu-devel] [RFC PATCH qemu v2 4/5] vfio: Refactor memory listener to accommodate more IOMMU types Alexey Kardashevskiy
2015-07-13 14:56 ` [Qemu-devel] [RFC PATCH qemu v2 5/5] vfio: spapr: Add SPAPR IOMMU v2 support (DMA memory preregistering) Alexey Kardashevskiy
2015-07-13 19:37 ` [Qemu-devel] [RFC PATCH qemu v2 0/5] vfio: SPAPR IOMMU v2 (memory preregistration support) Alex Williamson
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