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VFIO updates 2016-03-28

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- Use 128bit math to avoid asserts with IOMMU regions (Bandan Das)
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Merge remote-tracking branch 'remotes/awilliam/tags/vfio-update-20160328.0' into staging

VFIO updates 2016-03-28

 - Use 128bit math to avoid asserts with IOMMU regions (Bandan Das)

# gpg: Signature made Mon 28 Mar 2016 23:16:52 BST using RSA key ID 3BB08B22
# gpg: Good signature from "Alex Williamson <alex.williamson@redhat.com>"
# gpg:                 aka "Alex Williamson <alex@shazbot.org>"
# gpg:                 aka "Alex Williamson <alwillia@redhat.com>"
# gpg:                 aka "Alex Williamson <alex.l.williamson@gmail.com>"

* remotes/awilliam/tags/vfio-update-20160328.0:
  vfio: convert to 128 bit arithmetic calculations when adding mem regions

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2016-03-29 17:39:41 +01:00
commit 7cd592bc65
1 changed files with 11 additions and 8 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

19
hw/vfio/common.c
View File

@ -323,7 +323,7 @@ static void vfio_listener_region_add(MemoryListener *listener,
{
VFIOContainer *container = container_of(listener, VFIOContainer, listener);
hwaddr iova, end;
Int128 llend;
Int128 llend, llsize;
void *vaddr;
int ret;
@ -349,12 +349,12 @@ static void vfio_listener_region_add(MemoryListener *listener,
if (int128_ge(int128_make64(iova), llend)) {
return;
}
end = int128_get64(llend);
end = int128_get64(int128_sub(llend, int128_one()));
if ((iova < container->min_iova) || ((end - 1) > container->max_iova)) {
if ((iova < container->min_iova) || (end > container->max_iova)) {
error_report("vfio: IOMMU container %p can't map guest IOVA region"
" 0x%"HWADDR_PRIx"..0x%"HWADDR_PRIx,
container, iova, end - 1);
container, iova, end);
ret = -EFAULT;
goto fail;
}
@ -364,7 +364,7 @@ static void vfio_listener_region_add(MemoryListener *listener,
if (memory_region_is_iommu(section->mr)) {
VFIOGuestIOMMU *giommu;
trace_vfio_listener_region_add_iommu(iova, end - 1);
trace_vfio_listener_region_add_iommu(iova, end);
/*
* FIXME: We should do some checking to see if the
* capabilities of the host VFIO IOMMU are adequate to model
@ -395,13 +395,16 @@ static void vfio_listener_region_add(MemoryListener *listener,
section->offset_within_region +
(iova - section->offset_within_address_space);
trace_vfio_listener_region_add_ram(iova, end - 1, vaddr);
trace_vfio_listener_region_add_ram(iova, end, vaddr);
ret = vfio_dma_map(container, iova, end - iova, vaddr, section->readonly);
llsize = int128_sub(llend, int128_make64(iova));
ret = vfio_dma_map(container, iova, int128_get64(llsize),
vaddr, section->readonly);
if (ret) {
error_report("vfio_dma_map(%p, 0x%"HWADDR_PRIx", "
"0x%"HWADDR_PRIx", %p) = %d (%m)",
container, iova, end - iova, vaddr, ret);
container, iova, int128_get64(llsize), vaddr, ret);
goto fail;
}