Description: spice/qxl: locking fix for qemu-kvm Author: Gerd Hoffmann Source: upstream, http://patchwork.ozlabs.org/patch/84704/ Forwarding: not-needed Index: qemu-0.14.0/hw/qxl.c =================================================================== --- qemu-0.14.0.orig/hw/qxl.c +++ qemu-0.14.0/hw/qxl.c @@ -125,6 +125,27 @@ static void qxl_reset_memslots(PCIQXLDev static void qxl_reset_surfaces(PCIQXLDevice *d); static void qxl_ring_set_dirty(PCIQXLDevice *qxl); +/* qemu-kvm locking ... */ +void qxl_unlock_iothread(SimpleSpiceDisplay *ssd) +{ + if (cpu_single_env) { + assert(ssd->env == NULL); + ssd->env = cpu_single_env; + cpu_single_env = NULL; + } + qemu_mutex_unlock_iothread(); +} + +void qxl_lock_iothread(SimpleSpiceDisplay *ssd) +{ + qemu_mutex_lock_iothread(); + if (ssd->env) { + assert(cpu_single_env == NULL); + cpu_single_env = ssd->env; + ssd->env = NULL; + } +} + static inline uint32_t msb_mask(uint32_t val) { uint32_t mask; @@ -662,10 +683,10 @@ static void qxl_hard_reset(PCIQXLDevice dprint(d, 1, "%s: start%s\n", __FUNCTION__, loadvm ? " (loadvm)" : ""); - qemu_mutex_unlock_iothread(); + qxl_unlock_iothread(&d->ssd); d->ssd.worker->reset_cursor(d->ssd.worker); d->ssd.worker->reset_image_cache(d->ssd.worker); - qemu_mutex_lock_iothread(); + qxl_lock_iothread(&d->ssd); qxl_reset_surfaces(d); qxl_reset_memslots(d); @@ -795,9 +816,9 @@ static void qxl_reset_surfaces(PCIQXLDev { dprint(d, 1, "%s:\n", __FUNCTION__); d->mode = QXL_MODE_UNDEFINED; - qemu_mutex_unlock_iothread(); + qxl_unlock_iothread(&d->ssd); d->ssd.worker->destroy_surfaces(d->ssd.worker); - qemu_mutex_lock_iothread(); + qxl_lock_iothread(&d->ssd); memset(&d->guest_surfaces.cmds, 0, sizeof(d->guest_surfaces.cmds)); } @@ -866,9 +887,9 @@ static void qxl_destroy_primary(PCIQXLDe dprint(d, 1, "%s\n", __FUNCTION__); d->mode = QXL_MODE_UNDEFINED; - qemu_mutex_unlock_iothread(); + qxl_unlock_iothread(&d->ssd); d->ssd.worker->destroy_primary_surface(d->ssd.worker, 0); - qemu_mutex_lock_iothread(); + qxl_lock_iothread(&d->ssd); } static void qxl_set_mode(PCIQXLDevice *d, int modenr, int loadvm) @@ -938,10 +959,10 @@ static void ioport_write(void *opaque, u case QXL_IO_UPDATE_AREA: { QXLRect update = d->ram->update_area; - qemu_mutex_unlock_iothread(); + qxl_unlock_iothread(&d->ssd); d->ssd.worker->update_area(d->ssd.worker, d->ram->update_surface, &update, NULL, 0, 0); - qemu_mutex_lock_iothread(); + qxl_lock_iothread(&d->ssd); break; } case QXL_IO_NOTIFY_CMD: Index: qemu-0.14.0/ui/spice-display.c =================================================================== --- qemu-0.14.0.orig/ui/spice-display.c +++ qemu-0.14.0/ui/spice-display.c @@ -186,18 +186,18 @@ void qemu_spice_create_host_primary(Simp surface.mem = (intptr_t)ssd->buf; surface.group_id = MEMSLOT_GROUP_HOST; - qemu_mutex_unlock_iothread(); + qxl_unlock_iothread(ssd); ssd->worker->create_primary_surface(ssd->worker, 0, &surface); - qemu_mutex_lock_iothread(); + qxl_lock_iothread(ssd); } void qemu_spice_destroy_host_primary(SimpleSpiceDisplay *ssd) { dprint(1, "%s:\n", __FUNCTION__); - qemu_mutex_unlock_iothread(); + qxl_unlock_iothread(ssd); ssd->worker->destroy_primary_surface(ssd->worker, 0); - qemu_mutex_lock_iothread(); + qxl_lock_iothread(ssd); } void qemu_spice_vm_change_state_handler(void *opaque, int running, int reason) @@ -207,9 +207,9 @@ void qemu_spice_vm_change_state_handler( if (running) { ssd->worker->start(ssd->worker); } else { - qemu_mutex_unlock_iothread(); + qxl_unlock_iothread(ssd); ssd->worker->stop(ssd->worker); - qemu_mutex_lock_iothread(); + qxl_lock_iothread(ssd); } ssd->running = running; } Index: qemu-0.14.0/ui/spice-display.h =================================================================== --- qemu-0.14.0.orig/ui/spice-display.h +++ qemu-0.14.0/ui/spice-display.h @@ -43,6 +43,9 @@ typedef struct SimpleSpiceDisplay { QXLRect dirty; int notify; int running; + + /* qemu-kvm locking ... */ + void *env; } SimpleSpiceDisplay; typedef struct SimpleSpiceUpdate { @@ -52,6 +55,9 @@ typedef struct SimpleSpiceUpdate { uint8_t *bitmap; } SimpleSpiceUpdate; +void qxl_unlock_iothread(SimpleSpiceDisplay *ssd); +void qxl_lock_iothread(SimpleSpiceDisplay *ssd); + int qemu_spice_rect_is_empty(const QXLRect* r); void qemu_spice_rect_union(QXLRect *dest, const QXLRect *r);