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xen: only track the linear framebuffer

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Xen can only do dirty bit tracking for one memory region, so we should
explicitly avoid trying to track anything but the vga vram region.

Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Stefano Stabellini 2011-06-15 17:29:27 +01:00 committed by Alexander Graf
parent 45dcd36e1e
commit ebed85058b
1 changed files with 14 additions and 0 deletions
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14
xen-all.c
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@ -215,6 +215,7 @@ static int xen_add_to_physmap(XenIOState *state,
int rc = 0; int rc = 0;
XenPhysmap *physmap = NULL; XenPhysmap *physmap = NULL;
target_phys_addr_t pfn, start_gpfn; target_phys_addr_t pfn, start_gpfn;
RAMBlock *block;
if (get_physmapping(state, start_addr, size)) { if (get_physmapping(state, start_addr, size)) {
return 0; return 0;
@ -223,6 +224,19 @@ static int xen_add_to_physmap(XenIOState *state,
return -1; return -1;
} }
/* Xen can only handle a single dirty log region for now and we want
* the linear framebuffer to be that region.
* Avoid tracking any regions that is not videoram and avoid tracking
* the legacy vga region. */
QLIST_FOREACH(block, &ram_list.blocks, next) {
if (!strcmp(block->idstr, "vga.vram") && block->offset == phys_offset
&& start_addr > 0xbffff) {
goto go_physmap;
}
}
return -1;
go_physmap:
DPRINTF("mapping vram to %llx - %llx, from %llx\n", DPRINTF("mapping vram to %llx - %llx, from %llx\n",
start_addr, start_addr + size, phys_offset); start_addr, start_addr + size, phys_offset);