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=-3.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED autolearn=no 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 6CB32C5519F for ; Mon, 16 Nov 2020 11:07:14 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 77D0E20853 for ; Mon, 16 Nov 2020 11:07:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 77D0E20853 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=bugs.launchpad.net Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:50920 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1kecLo-0000lO-AY for qemu-devel@archiver.kernel.org; Mon, 16 Nov 2020 06:07:12 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:40660) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1kecL5-0000Hc-6l for qemu-devel@nongnu.org; Mon, 16 Nov 2020 06:06:27 -0500 Received: from indium.canonical.com ([91.189.90.7]:39014) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kecL2-0000M1-NJ for qemu-devel@nongnu.org; Mon, 16 Nov 2020 06:06:26 -0500 Received: from loganberry.canonical.com ([91.189.90.37]) by indium.canonical.com with esmtp (Exim 4.86_2 #2 (Debian)) id 1kecKx-0003lb-8H for ; Mon, 16 Nov 2020 11:06:19 +0000 Received: from loganberry.canonical.com (localhost [127.0.0.1]) by loganberry.canonical.com (Postfix) with ESMTP id 34BF52E8132 for ; Mon, 16 Nov 2020 11:06:19 +0000 (UTC) MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Date: Mon, 16 Nov 2020 10:58:19 -0000 From: Roman Bolshakov <1759333@bugs.launchpad.net> To: qemu-devel@nongnu.org X-Launchpad-Notification-Type: bug X-Launchpad-Bug: product=qemu; status=Incomplete; importance=Undecided; assignee=None; X-Launchpad-Bug-Tags: hvf x86 X-Launchpad-Bug-Information-Type: Public X-Launchpad-Bug-Private: no X-Launchpad-Bug-Security-Vulnerability: no X-Launchpad-Bug-Commenters: fbn7331 roolebo th-huth X-Launchpad-Bug-Reporter: Fa Bi (fbn7331) X-Launchpad-Bug-Modifier: Roman Bolshakov (roolebo) References: <152217002978.21179.18362367542097684091.malonedeb@wampee.canonical.com> Message-Id: <160552429932.20240.11862361120061267411.malone@soybean.canonical.com> Subject: [Bug 1759333] Re: Illegal Instruction with HVF when encountering SSE instructions in the emulator X-Launchpad-Message-Rationale: Subscriber (QEMU) @qemu-devel-ml X-Launchpad-Message-For: qemu-devel-ml Precedence: bulk X-Generated-By: Launchpad (canonical.com); Revision="38ebca4a151c7e484f2992f7b90f5a3ede13f97f"; Instance="production" X-Launchpad-Hash: 0a7d30be2b61ed07c5e68ac9137fd7486e7b1546 Received-SPF: none client-ip=91.189.90.7; envelope-from=bounces@canonical.com; helo=indium.canonical.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/11/16 04:16:03 X-ACL-Warn: Detected OS = Linux 3.11 and newer [fuzzy] X-Spam_score_int: -66 X-Spam_score: -6.7 X-Spam_bar: ------ X-Spam_report: (-6.7 / 5.0 requ) BAYES_00=-1.9, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_HI=-5, RCVD_IN_MSPIKE_H3=-0.01, RCVD_IN_MSPIKE_WL=-0.01, SPF_HELO_NONE=0.001, SPF_NONE=0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Reply-To: Bug 1759333 <1759333@bugs.launchpad.net> Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" Thomas, I think the issue is there. SSE/MMX weren't yet added for HVF. -- = You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/1759333 Title: Illegal Instruction with HVF when encountering SSE instructions in the emulator Status in QEMU: Incomplete Bug description: The latest version of QEMU doesn't seem to support emulated SSE instructi= ons with HVF acceleration on macOS. The decoder will treat SSE instructions as invalid, get the instruction s= izes wrong and quickly crash the guest OS because of illegal instructions. After having a quick look at target/i386/hvf/x86_decode.c, it seems that = SSE instruction emulation isn't implemented in the current version of the x= 86 emulator. A way to reproduce the issue is to run a macOS 10.13 guest with HVF acceleration enabled, this will crash in the guest once it's loading up the GUI (and also print a "Unimplemented handler" warning from target/i386/hvf/x86_emu.c). 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