From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-10.8 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 92BEAC433ED for ; Tue, 13 Apr 2021 01:23:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6909E600CD for ; Tue, 13 Apr 2021 01:23:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244785AbhDMBYQ (ORCPT ); Mon, 12 Apr 2021 21:24:16 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:22323 "EHLO us-smtp-delivery-124.mimecast.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240522AbhDMBYP (ORCPT ); Mon, 12 Apr 2021 21:24:15 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1618277036; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Vdb72vFtidwPinNRFHvros4PP2idQiBFZaTUwAj2cuc=; b=ItXNkXMjmEdPJ+dxOrMRliCk3jbvRO2+KCHmwwEYUpwLUykIjFlqU7sRZCJq4RCOXs/eZg lruSBEewYnNT/G7glBVREIujX7a7/iHJKMyLSjTQxlPsHc4HQ7r4cs9hidWWD5Se9byQGS uBUQGY8I+gzTAYxxwzBBlIqLI5nFKf4= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-237-Z9JJU6_uN_KDYxPT0Ueucw-1; Mon, 12 Apr 2021 21:23:50 -0400 X-MC-Unique: Z9JJU6_uN_KDYxPT0Ueucw-1 Received: from smtp.corp.redhat.com (int-mx03.intmail.prod.int.phx2.redhat.com [10.5.11.13]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 745D18030A1; Tue, 13 Apr 2021 01:23:49 +0000 (UTC) Received: from x1.home.shazbot.org (ovpn-117-254.rdu2.redhat.com [10.10.117.254]) by smtp.corp.redhat.com (Postfix) with ESMTP id 2442F6F13B; Tue, 13 Apr 2021 01:23:47 +0000 (UTC) Date: Mon, 12 Apr 2021 19:23:47 -0600 From: Alex Williamson To: zhenyuw@linux.intel.com, zhi.a.wang@intel.com Cc: intel-gvt-dev@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, , yan.y.zhao@intel.com Subject: Re: Regression: gvt: vgpu 1: MI_LOAD_REGISTER_MEM handler error Message-ID: <20210412192347.042fbc14@x1.home.shazbot.org> In-Reply-To: <20210412103214.337d521a@omen> References: <20210412103214.337d521a@omen> Organization: Red Hat MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Mon, 12 Apr 2021 10:32:14 -0600 Alex Williamson wrote: > Running a Windows guest on a i915-GVTg_V4_2 from an HD 5500 IGD on > v5.12-rc6 results in host logs: > > gvt: vgpu 1: lrm access to register (20c0) > gvt: vgpu 1: MI_LOAD_REGISTER_MEM handler error > gvt: vgpu 1: cmd parser error > 0x0 > 0x29 > > gvt: vgpu 1: scan wa ctx error > gvt: vgpu 1: failed to submit desc 0 > gvt: vgpu 1: fail submit workload on ring rcs0 > gvt: vgpu 1: fail to emulate MMIO write 00002230 len 4 > > The guest goes into a boot loop triggering this error before reaching > the desktop and rebooting. Guest using Intel driver 20.19.15.5171 > dated 11/4/2020 (from driver file 15.40.5171). > > This VM works well with the same guest and userspace software stack on > Fedora's kernel 5.11.11-200.fc33.x86_64. Thanks, Bisected to: commit f18d417a57438498e0de481d3a0bc900c2b0e057 Author: Yan Zhao Date: Wed Dec 23 11:45:08 2020 +0800 drm/i915/gvt: filter cmds "srm" and "lrm" in cmd_handler do not allow "srm" and "lrm" except for GEN8_L3SQCREG4 and 0x21f0. Cc: Colin Xu Cc: Kevin Tian Signed-off-by: Yan Zhao Signed-off-by: Zhenyu Wang Link: http://patchwork.freedesktop.org/patch/msgid/20201223034508.17031-1-yan.y.zhao@intel.com Reviewed-by: Zhenyu Wang