From nobody Thu Sep 18 18:47:02 2025 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 44F1AC352A1 for ; Sun, 4 Dec 2022 01:33:11 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230003AbiLDBdJ (ORCPT ); Sat, 3 Dec 2022 20:33:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:35700 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229961AbiLDBcj (ORCPT ); Sat, 3 Dec 2022 20:32:39 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 456E71A21D for ; Sat, 3 Dec 2022 17:31:37 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1670117496; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=++X/DNxCXN/sOFk0nHQ8NlaSzg5UKadXXJTnhV6jxJs=; b=ZWeFaibB5tZSTGfAET0HIg3AbxbzYzIue0CGp6SfwNXz6N2xaT8zselAotUKFhc4JDzwnT y2R9NQQlvxLgQEp+som8b/tKygNEs6+m2DLX12JjZtA5qfAKWYHWe/nE+1b+9pPZluttFa ndUfMAOpu4HKtLV+f/uSsatyXCg+ocE= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-60-obr3vKRTO-qsZA4wEXD53A-1; Sat, 03 Dec 2022 20:31:33 -0500 X-MC-Unique: obr3vKRTO-qsZA4wEXD53A-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 406C0185A794; Sun, 4 Dec 2022 01:31:32 +0000 (UTC) Received: from MiWiFi-R3L-srv.redhat.com (ovpn-12-31.pek2.redhat.com [10.72.12.31]) by smtp.corp.redhat.com (Postfix) with ESMTP id 1A41F141511E; Sun, 4 Dec 2022 01:31:25 +0000 (UTC) From: Baoquan He To: linux-kernel@vger.kernel.org Cc: linux-mm@kvack.org, stephen.s.brennan@oracle.com, urezki@gmail.com, willy@infradead.org, akpm@linux-foundation.org, hch@infradead.org, Baoquan He , Michael Ellerman , Nicholas Piggin , Christophe Leroy , =?UTF-8?q?Pali=20Roh=C3=A1r?= , linuxppc-dev@lists.ozlabs.org Subject: [PATCH v1 6/7] powerpc: mm: add VM_IOREMAP flag to the vmalloc area Date: Sun, 4 Dec 2022 09:30:45 +0800 Message-Id: <20221204013046.154960-7-bhe@redhat.com> In-Reply-To: <20221204013046.154960-1-bhe@redhat.com> References: <20221204013046.154960-1-bhe@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" Currently, for vmalloc areas with flag VM_IOREMAP set, except of the specific alignment clamping in __get_vm_area_node(), they will be 1) Shown as ioremap in /proc/vmallocinfo; 2) Ignored by /proc/kcore reading via vread() So for the io mapping in ioremap_phb() of ppc, we should set VM_IOREMAP in flag to make it handled correctly as above. Signed-off-by: Baoquan He Cc: Michael Ellerman Cc: Nicholas Piggin Cc: Christophe Leroy Cc: "Pali Roh\ufffd\ufffdr" Cc: linuxppc-dev@lists.ozlabs.org --- arch/powerpc/kernel/pci_64.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/kernel/pci_64.c b/arch/powerpc/kernel/pci_64.c index 0c7cfb9fab04..fd42059ae2a5 100644 --- a/arch/powerpc/kernel/pci_64.c +++ b/arch/powerpc/kernel/pci_64.c @@ -132,7 +132,7 @@ void __iomem *ioremap_phb(phys_addr_t paddr, unsigned l= ong size) * address decoding but I'd rather not deal with those outside of the * reserved 64K legacy region. */ - area =3D __get_vm_area_caller(size, 0, PHB_IO_BASE, PHB_IO_END, + area =3D __get_vm_area_caller(size, VM_IOREMAP, PHB_IO_BASE, PHB_IO_END, __builtin_return_address(0)); if (!area) return NULL; --=20 2.34.1