Add two new IOs. QXL_IO_FLUSH_SURFACES - equivalent to update area for all surfaces, used to reduce vmexits from NumSurfaces to 1 on guest S3, S4 and resolution change (windows driver implementation is such that this is done on each of those occasions). QXL_IO_FLUSH_RELEASE - used to ensure anything on last_release is put on the release ring for the client to free.
Cc: Yonit Halperin <yhalp...@redhat.com> --- hw/qxl.c | 24 ++++++++++++++++++++++++ 1 files changed, 24 insertions(+), 0 deletions(-) diff --git a/hw/qxl.c b/hw/qxl.c index 29425a5..f158d45 100644 --- a/hw/qxl.c +++ b/hw/qxl.c @@ -1247,6 +1247,30 @@ static void ioport_write(void *opaque, uint32_t addr, uint32_t val) case QXL_IO_DESTROY_ALL_SURFACES: qxl_spice_destroy_surfaces(d); break; + case QXL_IO_FLUSH_SURFACES: + dprint(d, 1, "QXL_IO_FLUSH_SURFACES (%d) entry (%s, s#=%d, res#=%d)\n", + val, qxl_mode_to_string(d->mode), d->guest_surfaces.count, + d->num_free_res); + qemu_spice_stop(&d->ssd); + qemu_spice_start(&d->ssd); + dprint(d, 1, "QXL_IO_FLUSH_SURFACES exit (%s, s#=%d, res#=%d,%p)\n", + qxl_mode_to_string(d->mode), d->guest_surfaces.count, + d->num_free_res, d->last_release); + break; + case QXL_IO_FLUSH_RELEASE: { + QXLReleaseRing *ring = &d->ram->release_ring; + if (ring->prod - ring->cons + 1 == ring->num_items) { + // TODO - "return" a value to the guest and let it loop? + fprintf(stderr, + "ERROR: no flush, full release ring [p%d,%dc]\n", + ring->prod, ring->cons); + } + qxl_push_free_res(d, 1 /* flush */); + dprint(d, 1, "QXL_IO_FLUSH_RELEASE exit (%s, s#=%d, res#=%d,%p)\n", + qxl_mode_to_string(d->mode), d->guest_surfaces.count, + d->num_free_res, d->last_release); + break; + } case QXL_IO_MEMSLOT_ADD_ASYNC: PANIC_ON(val >= NUM_MEMSLOTS); PANIC_ON(d->guest_slots[val].active); -- 1.7.5.4