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 kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 8D8BACA1009 for ; Wed, 3 Sep 2025 16:25:59 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id CA5948E0012; Wed, 3 Sep 2025 12:25:58 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id C56D08E0001; Wed, 3 Sep 2025 12:25:58 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B44908E0012; Wed, 3 Sep 2025 12:25:58 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id 9EBE08E0001 for ; Wed, 3 Sep 2025 12:25:58 -0400 (EDT) Received: from smtpin25.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay07.hostedemail.com (Postfix) with ESMTP id 4EF451607C6 for ; Wed, 3 Sep 2025 16:25:58 +0000 (UTC) X-FDA: 83848465596.25.305155E Received: from tor.source.kernel.org (tor.source.kernel.org [172.105.4.254]) by imf15.hostedemail.com (Postfix) with ESMTP id C5876A0017 for ; Wed, 3 Sep 2025 16:25:56 +0000 (UTC) Authentication-Results: imf15.hostedemail.com; dkim=none; spf=pass (imf15.hostedemail.com: domain of cmarinas@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=cmarinas@kernel.org; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1756916756; h=from:from:sender: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: in-reply-to:in-reply-to:references:references; bh=naiguCmQixdnHGLdSeGC1JbSxxv+Z9dT+/IMsE9bOUs=; b=tn/piyksClF9SnkRyDY/YlExpXP0NSx3IMxBw8uldsoyVW96An0YRau1Xl1BgWEaDrf2Kw om2vr/8tvRa5uZM9blX5P3Vd/pJZkeXYXgfSq29+pNOhcCJuukhSkywqjEKVWfuMVcIDTR T85dv4g0kQC+zwDpzIDTfEKPAEbhpf0= ARC-Authentication-Results: i=1; imf15.hostedemail.com; dkim=none; spf=pass (imf15.hostedemail.com: domain of cmarinas@kernel.org designates 172.105.4.254 as permitted sender) smtp.mailfrom=cmarinas@kernel.org; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1756916756; a=rsa-sha256; cv=none; b=OTjJ4gRhnyzeIuqGI2lkxaDtT/ETxBEwGTI7C2miF5rNUvkt2V11XI3/zHE0d1Za6zb1tU xpFMo72QOXijVSBFleFA6rQuX+g9DjgJX89OCE17dxWm7lhkO7ZMtXdZEcnR/5UTehTSMg ZGCDBQcwOInugi+BjcCDk6IY3V9CTk0= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id 50E486025C; Wed, 3 Sep 2025 16:25:56 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 78F67C4CEE7; Wed, 3 Sep 2025 16:25:51 +0000 (UTC) Date: Wed, 3 Sep 2025 17:25:48 +0100 From: Catalin Marinas To: Jonathan Cameron Cc: james.morse@arm.com, linux-cxl@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, Will Deacon , Dan Williams , Davidlohr Bueso , "H . Peter Anvin" , Peter Zijlstra , Yicong Yang , linuxarm@huawei.com, Yushan Wang , Lorenzo Pieralisi , Mark Rutland , Dave Hansen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, Andy Lutomirski Subject: Re: [PATCH v3 5/8] arm64: Select GENERIC_CPU_CACHE_MAINTENANCE and ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION Message-ID: References: <20250820102950.175065-1-Jonathan.Cameron@huawei.com> <20250820102950.175065-6-Jonathan.Cameron@huawei.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20250820102950.175065-6-Jonathan.Cameron@huawei.com> X-Rspamd-Queue-Id: C5876A0017 X-Rspam-User: X-Stat-Signature: uu3zmnemha9rksgpxmseem4btqpdsjiw X-Rspamd-Server: rspam09 X-HE-Tag: 1756916756-49286 X-HE-Meta: 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 /tYGMwur moQCGxSBce1q9S3YtT3QYH3sNe69qMPyMZQjUOSjRlyefEa7CQ2hhu53i8pZyqhRzQPmUdkiqSpgw5gv9Fp3IkZDqCwjePRfHj7vo27ohI8vnasMOVnz0d+r6MlphMvdMQTNoSZARbPQ1o0v5id5kjuk4dSLOgyca99AZRQ8RqTYSa3bBoBQUH9xWgNWXysXyF2qc3/C06Vf5qQXNI/ir3aqrDl9f/F4lZUFzNh3Ovjtip2Kc2ICPgMxJvhn2tvK15GN7D+pJYN+PX7pHDtE0Xpy4BGzLdOGsrV+SX/Z5fRSupc7c3slgRkS59NeuOpfrTpuBFz5bffroNnWeUhZYAEtFrzbkAWSIdZBdrfw+U7Q4ncw962mQekrlWPsg/DkJIcZqgJyt5g2aXH5paZVUTx2iLtodAHm/DVlkNzzAQg5XDVCSUYOwyF/tTvm0aLjBcgk2/6NrELDgHP+AVjsEU718qyzaFwb2axSV X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Wed, Aug 20, 2025 at 11:29:47AM +0100, Jonathan Cameron wrote: > Ensure the hooks that the generic cache maintenance framework uses are > available on ARM64 by selecting ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION. > > The generic CPU cache maintenance framework provides a way to register > drivers for devices implementing the underlying support for > cpu_cache_has_invalidate_memregion(). > > Signed-off-by: Jonathan Cameron > --- > arch/arm64/Kconfig | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index e9bbfacc35a6..15bf429b3f59 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -21,6 +21,7 @@ config ARM64 > select ARCH_ENABLE_THP_MIGRATION if TRANSPARENT_HUGEPAGE > select ARCH_HAS_CACHE_LINE_SIZE > select ARCH_HAS_CC_PLATFORM > + select ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION We could drop this if GENERIC_CPU_CACHE_MAINTENANCE selects it. > select ARCH_HAS_CURRENT_STACK_POINTER > select ARCH_HAS_DEBUG_VIRTUAL > select ARCH_HAS_DEBUG_VM_PGTABLE > @@ -146,6 +147,7 @@ config ARM64 > select GENERIC_ARCH_TOPOLOGY > select GENERIC_CLOCKEVENTS_BROADCAST > select GENERIC_CPU_AUTOPROBE > + select GENERIC_CPU_CACHE_MAINTENANCE Either way: Acked-by: Catalin Marinas