diff options
Diffstat (limited to 'tools')
| -rw-r--r-- | tools/libxc/xenctrl.h | 20 |
1 files changed, 6 insertions, 14 deletions
diff --git a/tools/libxc/xenctrl.h b/tools/libxc/xenctrl.h index cd4e1ef0d8..32122fd303 100644 --- a/tools/libxc/xenctrl.h +++ b/tools/libxc/xenctrl.h @@ -1563,23 +1563,15 @@ int xc_hvm_inject_msi( xc_interface *xch, domid_t dom, uint64_t addr, uint32_t data); /* - * Track dirty bit changes in a VRAM region defined by - * [ first_pfn : first_pfn + nr - 1 ] + * Track dirty bit changes in the VRAM area * * All of this is done atomically: - * - gets the dirty bitmap since the last call, all zeroes for - * the first call with some new region - * - sets up a dirty tracking region for period up to the next call - * - clears the specified dirty tracking region. + * - get the dirty bitmap since the last call + * - set up dirty tracking area for period up to the next call + * - clear the dirty tracking area. * - * Creating a new region causes any existing regions that it overlaps - * to be discarded. - * - * Specifying nr == 0 causes all regions to be discarded and - * disables dirty bit tracking. - * - * If nr is not a multiple of 64, only the first nr bits of bitmap - * are well defined. + * Returns -ENODATA and does not fill bitmap if the area has changed since the + * last call. */ int xc_hvm_track_dirty_vram( xc_interface *xch, domid_t dom, |