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vhost: fixes

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Misc fixes related to memory region handling.
 
 Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
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Merge remote-tracking branch 'remotes/mst/tags/for_upstream' into staging

vhost: fixes

Misc fixes related to memory region handling.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

# gpg: Signature made Wed 25 Sep 2019 15:28:23 BST
# gpg:                using RSA key 281F0DB8D28D5469
# gpg: Good signature from "Michael S. Tsirkin <mst@kernel.org>" [full]
# gpg:                 aka "Michael S. Tsirkin <mst@redhat.com>" [full]
# Primary key fingerprint: 0270 606B 6F3C DF3D 0B17  0970 C350 3912 AFBE 8E67
#      Subkey fingerprint: 5D09 FD08 71C8 F85B 94CA  8A0D 281F 0DB8 D28D 5469

* remotes/mst/tags/for_upstream:
  vhost: Fix memory region section comparison
  memory: Provide an equality function for MemoryRegionSections
  memory: Align MemoryRegionSections fields

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2019-09-26 16:14:03 +01:00
commit 1329132d28
2 changed files with 20 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
hw/virtio/vhost.c
View File

@ -451,8 +451,13 @@ static void vhost_commit(MemoryListener *listener)
changed = true;
} else {
/* Same size, lets check the contents */
changed = n_old_sections && memcmp(dev->mem_sections, old_sections,
n_old_sections * sizeof(old_sections[0])) != 0;
for (int i = 0; i < n_old_sections; i++) {
if (!MemoryRegionSection_eq(&old_sections[i],
&dev->mem_sections[i])) {
changed = true;
break;
}
}
}
trace_vhost_commit(dev->started, changed);

14
include/exec/memory.h
View File

@ -495,15 +495,27 @@ static inline FlatView *address_space_to_flatview(AddressSpace *as)
* @nonvolatile: this section is non-volatile
*/
struct MemoryRegionSection {
Int128 size;
MemoryRegion *mr;
FlatView *fv;
hwaddr offset_within_region;
Int128 size;
hwaddr offset_within_address_space;
bool readonly;
bool nonvolatile;
};
static inline bool MemoryRegionSection_eq(MemoryRegionSection *a,
MemoryRegionSection *b)
{
return a->mr == b->mr &&
a->fv == b->fv &&
a->offset_within_region == b->offset_within_region &&
a->offset_within_address_space == b->offset_within_address_space &&
int128_eq(a->size, b->size) &&
a->readonly == b->readonly &&
a->nonvolatile == b->nonvolatile;
}
/**
* memory_region_init: Initialize a memory region
*