OpenE2K/qemu-e2k
13
4
Fork 0
Code Issues 4 Pull Requests Projects 2 Releases Activity

xen: Introduce xen_modified_memory.

Browse Source 
This function is to be used during live migration. Every write access to the
guest memory should call this funcion so the Xen tools knows which pages are
dirty.

Signed-off-by: Anthony PERARD <anthony.perard@citrix.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
This commit is contained in:
Anthony PERARD 2012-10-03 13:48:45 +00:00 committed by Stefano Stabellini
parent 39f42439d0
commit 910b38e4dc
3 changed files with 26 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
hw/xen.h
View File

@ -48,6 +48,7 @@ void xenstore_store_pv_console_info(int i, struct CharDriverState *chr);
struct MemoryRegion;
void xen_ram_alloc(ram_addr_t ram_addr, ram_addr_t size,
struct MemoryRegion *mr);
void xen_modified_memory(ram_addr_t start, ram_addr_t length);
#endif
struct MemoryRegion;

21
xen-all.c
View File

@ -1228,3 +1228,24 @@ void xen_shutdown_fatal_error(const char *fmt, ...)
/* destroy the domain */
qemu_system_shutdown_request();
}
void xen_modified_memory(ram_addr_t start, ram_addr_t length)
{
if (unlikely(xen_in_migration)) {
int rc;
ram_addr_t start_pfn, nb_pages;
if (length == 0) {
length = TARGET_PAGE_SIZE;
}
start_pfn = start >> TARGET_PAGE_BITS;
nb_pages = ((start + length + TARGET_PAGE_SIZE - 1) >> TARGET_PAGE_BITS)
- start_pfn;
rc = xc_hvm_modified_memory(xen_xc, xen_domid, start_pfn, nb_pages);
if (rc) {
fprintf(stderr,
"%s failed for "RAM_ADDR_FMT" ("RAM_ADDR_FMT"): %i, %s\n",
__func__, start, nb_pages, rc, strerror(-rc));
}
}
}

4
xen-stub.c
View File

@ -59,3 +59,7 @@ void xen_register_framebuffer(MemoryRegion *mr)
void qmp_xen_set_global_dirty_log(bool enable, Error **errp)
{
}
void xen_modified_memory(ram_addr_t start, ram_addr_t length)
{
}