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 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1C342C433FE for ; Tue, 9 Nov 2021 02:31:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 046626124D for ; Tue, 9 Nov 2021 02:31:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235219AbhKICe1 (ORCPT ); Mon, 8 Nov 2021 21:34:27 -0500 Received: from mail.kernel.org ([198.145.29.99]:49602 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235194AbhKICe1 (ORCPT ); Mon, 8 Nov 2021 21:34:27 -0500 Received: by mail.kernel.org (Postfix) with ESMTPSA id 70234611ED; Tue, 9 Nov 2021 02:31:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1636425102; bh=Xv6gQC9t+kUvmdlciFzhl3cxYDsw3E+fLuVW/YOI9kE=; h=Date:From:To:Subject:In-Reply-To:From; b=Ii55l+JmuLlAY/aLMy83bvlcKzQjV7WRmWKRD5yQ70D4hj1cvTkp94otB2pY55x7G biwzDsbTsjso6JfqYC/a+lMRs2hCZbY0LdLEv07r7hO3nVsRzwutDk2jQlJUtR2y2I zfhXhsYkQkqxsgjpBjFnAJNt4PF0Gpn8FMjeqsZ0= Date: Mon, 08 Nov 2021 18:31:41 -0800 From: Andrew Morton To: akpm@linux-foundation.org, bhe@redhat.com, boris.ostrovsky@oracle.com, bp@alien8.de, david@redhat.com, dyoung@redhat.com, hpa@zytor.com, jasowang@redhat.com, jgross@suse.com, linux-mm@kvack.org, mhocko@suse.com, mingo@redhat.com, mm-commits@vger.kernel.org, mst@redhat.com, osalvador@suse.de, rafael.j.wysocki@intel.com, rppt@kernel.org, sstabellini@kernel.org, tglx@linutronix.de, torvalds@linux-foundation.org, vgoyal@redhat.com Subject: [patch 06/87] x86/xen: print a warning when HVMOP_get_mem_type fails Message-ID: <20211109023141.kg--Gyb9n%akpm@linux-foundation.org> In-Reply-To: <20211108183057.809e428e841088b657a975ec@linux-foundation.org> User-Agent: s-nail v14.8.16 Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: David Hildenbrand Subject: x86/xen: print a warning when HVMOP_get_mem_type fails HVMOP_get_mem_type is not expected to fail, "This call failing is indication of something going quite wrong and it would be good to know about this." [1] Let's add a pr_warn_once(). [1] https://lkml.kernel.org/r/3b935aa0-6d85-0bcd-100e-15098add3c4c@oracle.com Link: https://lkml.kernel.org/r/20211005121430.30136-4-david@redhat.com Signed-off-by: David Hildenbrand Suggested-by: Boris Ostrovsky Cc: Baoquan He Cc: Borislav Petkov Cc: Dave Young Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: Jason Wang Cc: Juergen Gross Cc: "Michael S. Tsirkin" Cc: Michal Hocko Cc: Mike Rapoport Cc: Oscar Salvador Cc: "Rafael J. Wysocki" Cc: Stefano Stabellini Cc: Thomas Gleixner Cc: Vivek Goyal Signed-off-by: Andrew Morton --- arch/x86/xen/mmu_hvm.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) --- a/arch/x86/xen/mmu_hvm.c~x86-xen-print-a-warning-when-hvmop_get_mem_type-fails +++ a/arch/x86/xen/mmu_hvm.c @@ -22,8 +22,10 @@ static int xen_oldmem_pfn_is_ram(unsigne .pfn = pfn, }; - if (HYPERVISOR_hvm_op(HVMOP_get_mem_type, &a)) + if (HYPERVISOR_hvm_op(HVMOP_get_mem_type, &a)) { + pr_warn_once("Unexpected HVMOP_get_mem_type failure\n"); return -ENXIO; + } return a.mem_type != HVMMEM_mmio_dm; } #endif _