From 5220c5f108de79548a73d7d8a01eccc8abc7ad1e Mon Sep 17 00:00:00 2001 From: Alon Levy Date: Sun, 24 Jul 2011 16:34:16 -0300 Subject: [RHEL6 qemu-kvm PATCH 35/65] qxl: fix surface tracking & locking RH-Author: Alon Levy Message-id: <1311525266-12705-7-git-send-email-alevy@redhat.com> Patchwork-id: 30248 O-Subject: [PATCH RHEL6.2 06/16] qxl: fix surface tracking & locking Bugzilla: 700134 RH-Acked-by: Gerd Hoffmann RH-Acked-by: Yonit Halperin RH-Acked-by: Arnon Gilboa From: Gerd Hoffmann Surface tracking needs proper locking since it is used from vcpu and spice worker threads, add it. Also reset the surface counter when zapping all surfaces. Signed-off-by: Gerd Hoffmann upstream: http://patchwork.ozlabs.org/patch/105614/ acked, slated for 0.16.0 --- hw/qxl.c | 13 ++++++++++++- hw/qxl.h | 2 ++ 2 files changed, 14 insertions(+), 1 deletions(-) Signed-off-by: Eduardo Habkost --- hw/qxl.c | 13 ++++++++++++- hw/qxl.h | 2 ++ 2 files changed, 14 insertions(+), 1 deletions(-) diff --git a/hw/qxl.c b/hw/qxl.c index a262bbe..02c3217 100644 --- a/hw/qxl.c +++ b/hw/qxl.c @@ -137,7 +137,12 @@ void qxl_spice_update_area(PCIQXLDevice *qxl, uint32_t surface_id, void qxl_spice_destroy_surface_wait(PCIQXLDevice *qxl, uint32_t id) { + qemu_mutex_lock(&qxl->track_lock); + PANIC_ON(id >= NUM_SURFACES); qxl->ssd.worker->destroy_surface_wait(qxl->ssd.worker, id); + qxl->guest_surfaces.cmds[id] = 0; + qxl->guest_surfaces.count--; + qemu_mutex_unlock(&qxl->track_lock); } void qxl_spice_loadvm_commands(PCIQXLDevice *qxl, struct QXLCommandExt *ext, @@ -158,7 +163,11 @@ void qxl_spice_reset_memslots(PCIQXLDevice *qxl) void qxl_spice_destroy_surfaces(PCIQXLDevice *qxl) { + qemu_mutex_lock(&qxl->track_lock); qxl->ssd.worker->destroy_surfaces(qxl->ssd.worker); + memset(&qxl->guest_surfaces.cmds, 0, sizeof(qxl->guest_surfaces.cmds)); + qxl->guest_surfaces.count = 0; + qemu_mutex_unlock(&qxl->track_lock); } void qxl_spice_reset_image_cache(PCIQXLDevice *qxl) @@ -317,6 +326,7 @@ static void qxl_track_command(PCIQXLDevice *qxl, struct QXLCommandExt *ext) QXLSurfaceCmd *cmd = qxl_phys2virt(qxl, ext->cmd.data, ext->group_id); uint32_t id = le32_to_cpu(cmd->surface_id); PANIC_ON(id >= NUM_SURFACES); + qemu_mutex_lock(&qxl->track_lock); if (cmd->type == QXL_SURFACE_CMD_CREATE) { qxl->guest_surfaces.cmds[id] = ext->cmd.data; qxl->guest_surfaces.count++; @@ -327,6 +337,7 @@ static void qxl_track_command(PCIQXLDevice *qxl, struct QXLCommandExt *ext) qxl->guest_surfaces.cmds[id] = 0; qxl->guest_surfaces.count--; } + qemu_mutex_unlock(&qxl->track_lock); break; } case QXL_CMD_CURSOR: @@ -863,7 +874,6 @@ static void qxl_reset_surfaces(PCIQXLDevice *d) dprint(d, 1, "%s:\n", __FUNCTION__); d->mode = QXL_MODE_UNDEFINED; qxl_spice_destroy_surfaces(d); - memset(&d->guest_surfaces.cmds, 0, sizeof(d->guest_surfaces.cmds)); } /* called from spice server thread context only */ @@ -1278,6 +1288,7 @@ static int qxl_init_common(PCIQXLDevice *qxl) qxl->generation = 1; qxl->num_memslots = NUM_MEMSLOTS; qxl->num_surfaces = NUM_SURFACES; + qemu_mutex_init(&qxl->track_lock); switch (qxl->revision) { case 1: /* spice 0.4 -- qxl-1 */ diff --git a/hw/qxl.h b/hw/qxl.h index 759b5cd..a47f5af 100644 --- a/hw/qxl.h +++ b/hw/qxl.h @@ -55,6 +55,8 @@ typedef struct PCIQXLDevice { } guest_surfaces; QXLPHYSICAL guest_cursor; + QemuMutex track_lock; + /* thread signaling */ pthread_t main; int pipe[2]; -- 1.7.3.2