From: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxx>
Signed-off-by: Alexander Graf <agraf@xxxxxxx>
---
xen-all.c | 14 ++++++++++++++
1 files changed, 14 insertions(+), 0 deletions(-)
diff --git a/xen-all.c b/xen-all.c
index 75a82c2..fe75ddd 100644
--- a/xen-all.c
+++ b/xen-all.c
@@ -215,6 +215,7 @@ static int xen_add_to_physmap(XenIOState *state,
int rc = 0;
XenPhysmap *physmap = NULL;
target_phys_addr_t pfn, start_gpfn;
+ RAMBlock *block;
if (get_physmapping(state, start_addr, size)) {
return 0;
@@ -223,6 +224,19 @@ static int xen_add_to_physmap(XenIOState *state,
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",
start_addr, start_addr + size, phys_offset);
--
1.6.0.2
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