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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,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 4F890C433B4 for ; Thu, 22 Apr 2021 15:10:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1741D61222 for ; Thu, 22 Apr 2021 15:10:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236517AbhDVPKw (ORCPT ); Thu, 22 Apr 2021 11:10:52 -0400 Received: from mx2.suse.de ([195.135.220.15]:51992 "EHLO mx2.suse.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236563AbhDVPKq (ORCPT ); Thu, 22 Apr 2021 11:10:46 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1619104211; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=dGYTI5hb6XF/TrVV+tK4E4xlOyG7i9BsqrnGlynZSJM=; b=rkqpNHxQEq8IWYLVp0llAxNQCop0wQDhH19sDYwFQ1gk0VAjV4ZLRAnd/O5DophQu1UYRk pEiSJ2EiOmjVHzPlg2XnZBk5IWyblvtmK0qwMpFZl7499bg6QnKLQwCytl7FzyMM9fxSya SXO1bDbx/20HgyDjak27WeKH3lnP8Hs= Received: from relay2.suse.de (unknown [195.135.221.27]) by mx2.suse.de (Postfix) with ESMTP id E9411B16D; Thu, 22 Apr 2021 15:10:10 +0000 (UTC) From: Juergen Gross To: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org Cc: Juergen Gross , Boris Ostrovsky , Stefano Stabellini , Peter Zijlstra Subject: [PATCH 1/3] xen: check required Xen features Date: Thu, 22 Apr 2021 17:10:05 +0200 Message-Id: <20210422151007.2205-2-jgross@suse.com> X-Mailer: git-send-email 2.26.2 In-Reply-To: <20210422151007.2205-1-jgross@suse.com> References: <20210422151007.2205-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Linux kernel is not supported to run on Xen versions older than 4.0. Add tests for required Xen features always being present in Xen 4.0 and newer. Signed-off-by: Juergen Gross --- drivers/xen/features.c | 18 ++++++++++++++++++ 1 file changed, 18 insertions(+) diff --git a/drivers/xen/features.c b/drivers/xen/features.c index 25c053b09605..60503299c9bc 100644 --- a/drivers/xen/features.c +++ b/drivers/xen/features.c @@ -9,13 +9,26 @@ #include #include #include +#include #include +#include #include #include #include +/* + * Linux kernel expects at least Xen 4.0. + * + * Assume some features to be available for that reason (depending on guest + * mode, of course). + */ +#define chk_feature(f) { \ + if (!xen_feature(f)) \ + pr_err("Xen: feature %s not available!\n", #f); \ + } + u8 xen_features[XENFEAT_NR_SUBMAPS * 32] __read_mostly; EXPORT_SYMBOL_GPL(xen_features); @@ -31,4 +44,9 @@ void xen_setup_features(void) for (j = 0; j < 32; j++) xen_features[i * 32 + j] = !!(fi.submap & 1<