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=-7.7 required=3.0 tests=DATE_IN_PAST_06_12, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_PASS,USER_AGENT_GIT 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 43A63C04AB1 for ; Fri, 10 May 2019 03:10:28 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 15264217F5 for ; Fri, 10 May 2019 03:10:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="DPFpzO5+" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727051AbfEJDK1 (ORCPT ); Thu, 9 May 2019 23:10:27 -0400 Received: from mail-pl1-f194.google.com ([209.85.214.194]:44726 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726842AbfEJDK0 (ORCPT ); Thu, 9 May 2019 23:10:26 -0400 Received: by mail-pl1-f194.google.com with SMTP id d3so2097259plj.11 for ; Thu, 09 May 2019 20:10:26 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id; bh=/t5j75iro/GTkRNvb56vHzY7kUX0cvtwivQC6BmF3k8=; b=DPFpzO5+Vy2cV8dmz+mvMEvfj3gn9VWYkEv/bP3IetEZVolW3GnlKMYUx2kst1dOzf QuRmM14KN3H1hzSx1bZUrUknPCMygzhopmoGmqyMf8yx6CTeTtbDo0PuX2cf4vi084+8 UDvfPe3u77h09UV0eJpofbd7ZefUHMWZ2HwJ14pqyqe7J23rHWSIG5w/N96jwnUqR6mF tDbXlnkrVk2wSRG0Bj5JuCDMgc7PHcxjc/8VMdqySVAxe6gnz2tM5JQBB93ViHUS97qX nhL5LHPXtqsYWUQePCuJ0orOW4wL1Ry/aFwpFQUWsxk57RHgk7y+tfbEMx0SN/5vtFlF 1IEQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id; bh=/t5j75iro/GTkRNvb56vHzY7kUX0cvtwivQC6BmF3k8=; b=rDwYMaU1xEwqOnsAR5zIwt4i80ZJIGqparg82IIE39mz82B1hXScSU8KQaRIkVgtMQ eXKmAz/PUJNP4roSnjQR0I+u04vjLRRn6Z1TXaQTlnperMwAIHy5381kdlDqJuEnEpwA TlosFtHW1Nzav7DhMDXGkN3O/jXhfvpwBXUlkUYB/D5QLAJyLOwofCmyVNqKT+yV34Ao TwJIayIX5GPR226iRF8u8gGugCJuFuu492G9+Nq0tcOBoHmj+mtXc/RGYhSP94+a4Prl x7cAl0n3dQNsijgAbPKPs1zGFcxv7cEzMPufxzGIp20sQMWPD6r5fZkcMv/z/j+jydb9 h4CA== X-Gm-Message-State: APjAAAW+l77xriVpT6JShsrExhAv21BcejOqqNKhR/kjUx05MGtzonQM n/tvSJEOtn51giqrZ3aIuuw= X-Google-Smtp-Source: APXvYqwwPOwoLMdFYeBKV0FK6fMLshceKCNVuE1H9Fray1m1gTnZvqQW5hn1ql2/fUL9FsHT2LocIg== X-Received: by 2002:a17:902:f215:: with SMTP id gn21mr10021500plb.194.1557457825623; Thu, 09 May 2019 20:10:25 -0700 (PDT) Received: from sc2-haas01-esx0118.eng.vmware.com ([66.170.99.1]) by smtp.gmail.com with ESMTPSA id h27sm6314203pfd.53.2019.05.09.20.10.23 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 09 May 2019 20:10:24 -0700 (PDT) From: Nadav Amit To: Paolo Bonzini Cc: kvm@vger.kernel.org, Nadav Amit Subject: [PATCH] x86: Halt on exit Date: Thu, 9 May 2019 12:50:23 -0700 Message-Id: <20190509195023.11933-1-nadav.amit@gmail.com> X-Mailer: git-send-email 2.17.1 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org In some cases, shutdown through the test device and Bochs might fail. Just hang in a loop that executes halt in such cases. Signed-off-by: Nadav Amit --- lib/x86/io.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/lib/x86/io.c b/lib/x86/io.c index f3e01f7..e6372c6 100644 --- a/lib/x86/io.c +++ b/lib/x86/io.c @@ -99,6 +99,10 @@ void exit(int code) #else asm volatile("out %0, %1" : : "a"(code), "d"((short)0xf4)); #endif + /* Fallback */ + while (1) { + asm volatile ("hlt" ::: "memory"); + } __builtin_unreachable(); } -- 2.17.1