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xen mapcache: check if memory region has moved.

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This patch changes the xen_map_cache behavior. Before trying to map a guest
addr, mapcache will look into the list of range of address that have been moved
(physmap/set_memory). There is currently one memory space like this, the vram,
"moved" from were it's allocated to were the guest will look into.

This help to have a succefull migration.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Anthony PERARD 2012-01-18 12:21:38 +00:00 • committed by Stefano Stabellini
parent d1814e08c0
commit cd1ba7de23
3 changed files with 43 additions and 6 deletions
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18
xen-all.c
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@ -225,6 +225,22 @@ static XenPhysmap *get_physmapping(XenIOState *state,
return NULL;
}
static target_phys_addr_t xen_phys_offset_to_gaddr(target_phys_addr_t start_addr,
ram_addr_t size, void *opaque)
{
target_phys_addr_t addr = start_addr & TARGET_PAGE_MASK;
XenIOState *xen_io_state = opaque;
XenPhysmap *physmap = NULL;
QLIST_FOREACH(physmap, &xen_io_state->physmap, list) {
if (range_covers_byte(physmap->phys_offset, physmap->size, addr)) {
return physmap->start_addr;
}
}
return start_addr;
}
#if CONFIG_XEN_CTRL_INTERFACE_VERSION >= 340
static int xen_add_to_physmap(XenIOState *state,
target_phys_addr_t start_addr,
@ -1043,7 +1059,7 @@ int xen_hvm_init(void)
}
/* Init RAM management */
xen_map_cache_init();
xen_map_cache_init(xen_phys_offset_to_gaddr, state);
xen_ram_init(ram_size);
qemu_add_vm_change_state_handler(xen_hvm_change_state_handler, state);