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=-10.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 D7C5DC433DF for ; Fri, 26 Jun 2020 09:26:06 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C033721527 for ; Fri, 26 Jun 2020 09:26:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726576AbgFZJ0G (ORCPT ); Fri, 26 Jun 2020 05:26:06 -0400 Received: from ex13-edg-ou-002.vmware.com ([208.91.0.190]:59908 "EHLO EX13-EDG-OU-002.vmware.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726532AbgFZJ0C (ORCPT ); Fri, 26 Jun 2020 05:26:02 -0400 Received: from sc9-mailhost2.vmware.com (10.113.161.72) by EX13-EDG-OU-002.vmware.com (10.113.208.156) with Microsoft SMTP Server id 15.0.1156.6; Fri, 26 Jun 2020 02:25:55 -0700 Received: from sc2-haas01-esx0118.eng.vmware.com (sc2-haas01-esx0118.eng.vmware.com [10.172.44.118]) by sc9-mailhost2.vmware.com (Postfix) with ESMTP id 07060B272D; Fri, 26 Jun 2020 05:26:00 -0400 (EDT) From: Nadav Amit To: Paolo Bonzini CC: , Nadav Amit Subject: [kvm-unit-tests PATCH 2/3] x86: realmode: hlt loop as fallback on exit Date: Fri, 26 Jun 2020 02:23:32 -0700 Message-ID: <20200626092333.2830-3-namit@vmware.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200626092333.2830-1-namit@vmware.com> References: <20200626092333.2830-1-namit@vmware.com> MIME-Version: 1.0 Content-Type: text/plain Received-SPF: None (EX13-EDG-OU-002.vmware.com: namit@vmware.com does not designate permitted sender hosts) Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org For systems without emulated devices (e.g., bare-metal), use halt-loop when exiting the realmode test. Signed-off-by: Nadav Amit --- x86/realmode.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/x86/realmode.c b/x86/realmode.c index ef79f7e..301b013 100644 --- a/x86/realmode.c +++ b/x86/realmode.c @@ -115,6 +115,10 @@ static int failed; static void exit(int code) { outb(code, 0xf4); + + while (1) { + asm volatile("hlt" ::: "memory"); + } } struct regs { -- 2.20.1