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Merge remote-tracking branch 'qemu-kvm/fix-vhost-after-memory-listener' into staging 

* qemu-kvm/fix-vhost-after-memory-listener:
  vhost: improve region filtering
  vhost: fix mem_sections memory corruption
  vhost: fix incorrect userspace address
This commit is contained in:
Anthony Liguori 2012-01-09 08:54:04 -06:00
parent 1ddde08780 c49450b98f
commit cd9244e48a
1 changed files with 17 additions and 6 deletions
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23
hw/vhost.c
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@ -15,6 +15,7 @@
#include "hw/hw.h"
#include "range.h"
#include <linux/vhost.h>
#include "exec-memory.h"
static void vhost_dev_sync_region(struct vhost_dev *dev,
MemoryRegionSection *section,
@ -365,10 +366,6 @@ static void vhost_set_memory(MemoryListener *listener,
int r;
void *ram;
if (!memory_region_is_ram(section->mr)) {
return;
}
dev->mem = g_realloc(dev->mem, s);
if (log_dirty) {
@ -378,7 +375,7 @@ static void vhost_set_memory(MemoryListener *listener,
assert(size);
/* Optimize no-change case. At least cirrus_vga does this a lot at this time. */
ram = memory_region_get_ram_ptr(section->mr);
ram = memory_region_get_ram_ptr(section->mr) + section->offset_within_region;
if (add) {
if (!vhost_dev_cmp_memory(dev, start_addr, size, (uintptr_t)ram)) {
/* Region exists with same address. Nothing to do. */
@ -430,12 +427,22 @@ static void vhost_set_memory(MemoryListener *listener,
}
}
static bool vhost_section(MemoryRegionSection *section)
{
return section->address_space == get_system_memory()
&& memory_region_is_ram(section->mr);
}
static void vhost_region_add(MemoryListener *listener,
MemoryRegionSection *section)
{
struct vhost_dev *dev = container_of(listener, struct vhost_dev,
memory_listener);
if (!vhost_section(section)) {
return;
}
++dev->n_mem_sections;
dev->mem_sections = g_renew(MemoryRegionSection, dev->mem_sections,
dev->n_mem_sections);
@ -450,13 +457,17 @@ static void vhost_region_del(MemoryListener *listener,
memory_listener);
int i;
if (!vhost_section(section)) {
return;
}
vhost_set_memory(listener, section, false);
for (i = 0; i < dev->n_mem_sections; ++i) {
if (dev->mem_sections[i].offset_within_address_space
== section->offset_within_address_space) {
--dev->n_mem_sections;
memmove(&dev->mem_sections[i], &dev->mem_sections[i+1],
dev->n_mem_sections - i);
(dev->n_mem_sections - i) * sizeof(*dev->mem_sections));
break;
}
}