From nobody Wed Oct 29 09:14:48 2025 Delivered-To: importer@patchew.org Received-SPF: pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) client-ip=208.118.235.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Authentication-Results: mx.zohomail.com; spf=pass (zoho.com: domain of gnu.org designates 208.118.235.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer=patchew.org@nongnu.org Return-Path: Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) by mx.zohomail.com with SMTPS id 1524731372290936.6574751739095; Thu, 26 Apr 2018 01:29:32 -0700 (PDT) Received: from localhost ([::1]:40949 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fBcHT-0005gH-HW for importer@patchew.org; Thu, 26 Apr 2018 04:29:31 -0400 Received: from eggs.gnu.org ([2001:4830:134:3::10]:36873) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1fBcEb-0003td-Pr for qemu-devel@nongnu.org; Thu, 26 Apr 2018 04:26:34 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1fBcEa-0003Lr-Ua for qemu-devel@nongnu.org; Thu, 26 Apr 2018 04:26:33 -0400 Received: from mga07.intel.com ([134.134.136.100]:55657) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1fBcEa-0003LZ-M5 for qemu-devel@nongnu.org; Thu, 26 Apr 2018 04:26:32 -0400 Received: from orsmga006.jf.intel.com ([10.7.209.51]) by orsmga105.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Apr 2018 01:26:31 -0700 Received: from tinazhang-linux-1.bj.intel.com ([10.238.158.97]) by orsmga006.jf.intel.com with ESMTP; 26 Apr 2018 01:26:30 -0700 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.49,330,1520924400"; d="scan'208";a="37172043" From: Tina Zhang To: alex.williamson@redhat.com, kraxel@redhat.com, zhenyuw@linux.intel.com, hang.yuan@intel.com Date: Thu, 26 Apr 2018 16:21:20 +0800 Message-Id: <1524730880-7154-3-git-send-email-tina.zhang@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1524730880-7154-1-git-send-email-tina.zhang@intel.com> References: <1524730880-7154-1-git-send-email-tina.zhang@intel.com> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 134.134.136.100 Subject: [Qemu-devel] [PATCH v3 2/2] ui: introduce vfio_display_reset X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: intel-gvt-dev@lists.freedesktop.org, qemu-devel@nongnu.org, Tina Zhang Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail: RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" During guest OS reboot, guest framebuffer is invalid. It will cause bugs, if the invalid guest framebuffer is still used by host. This patch is to introduce vfio_display_reset which is invoked during vfio display reset. This vfio_display_reset function is used to release the invalid display resource, disable scanout mode and replace the invalid surface with QemuConsole's DisplaySurafce. This patch can fix the GPU hang issue caused by gd_egl_draw during guest OS reboot. Changes v2->v3: - Limit vfio_display_reset to dma-buf based vfio display. (Gerd) Changes v1->v2: - Use dpy_gfx_update_full() update screen after reset. (Gerd) - Remove dpy_gfx_switch_surface(). (Gerd) Signed-off-by: Tina Zhang --- hw/vfio/display.c | 10 ++++++++++ hw/vfio/pci.c | 7 +++++++ hw/vfio/pci.h | 1 + 3 files changed, 18 insertions(+) diff --git a/hw/vfio/display.c b/hw/vfio/display.c index 7d727ce..dc4b1e9 100644 --- a/hw/vfio/display.c +++ b/hw/vfio/display.c @@ -198,6 +198,16 @@ static void vfio_display_dmabuf_exit(VFIODisplay *dpy) } =20 /* ---------------------------------------------------------------------- = */ +void vfio_display_reset(VFIOPCIDevice *vdev) +{ + if (!vdev || !vdev->dpy || !vdev->dpy->con) { + return; + } + + dpy_gl_scanout_disable(vdev->dpy->con); + vfio_display_dmabuf_exit(vdev->dpy); + dpy_gfx_update_full(vdev->dpy->con); +} =20 static void vfio_display_region_update(void *opaque) { diff --git a/hw/vfio/pci.c b/hw/vfio/pci.c index b9bc6cd..648b29d 100644 --- a/hw/vfio/pci.c +++ b/hw/vfio/pci.c @@ -3098,11 +3098,18 @@ static void vfio_pci_reset(DeviceState *dev) { PCIDevice *pdev =3D DO_UPCAST(PCIDevice, qdev, dev); VFIOPCIDevice *vdev =3D DO_UPCAST(VFIOPCIDevice, pdev, pdev); + VFIODisplay *dpy =3D vdev->dpy; =20 trace_vfio_pci_reset(vdev->vbasedev.name); =20 vfio_pci_pre_reset(vdev); =20 + /* vfio_display_reset is needed by dma-buf based vfio display */ + if (vdev->display !=3D ON_OFF_AUTO_OFF && dpy && + dpy->dmabuf.primary) { + vfio_display_reset(vdev); + } + if (vdev->resetfn && !vdev->resetfn(vdev)) { goto post_reset; } diff --git a/hw/vfio/pci.h b/hw/vfio/pci.h index 629c875..59ab775 100644 --- a/hw/vfio/pci.h +++ b/hw/vfio/pci.h @@ -176,6 +176,7 @@ int vfio_pci_igd_opregion_init(VFIOPCIDevice *vdev, struct vfio_region_info *info, Error **errp); =20 +void vfio_display_reset(VFIOPCIDevice *vdev); int vfio_display_probe(VFIOPCIDevice *vdev, Error **errp); void vfio_display_finalize(VFIOPCIDevice *vdev); =20 --=20 2.7.4