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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id E0566CA1010 for ; Wed, 3 Sep 2025 21:18:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=naiguCmQixdnHGLdSeGC1JbSxxv+Z9dT+/IMsE9bOUs=; b=YRdOv4RulBmdWLmVgk0HFh/HGW B95CRZqWEf3Fx6/r2z17w6guYGreu1utQFDkTEtkEzvYkueNMBMSW75n6nPEx6EocOoV6fDm9OjtA /Quz8soGjYfMIpp9Q2b65bEW3g1UQFKeh2wTABB7TDNqw1PFThUrRHWYSvauZqbd1XLCw4f+bPqpM iirWQUKzfi5ZxZSNS/mYW31XxUqQtGhzL6UsyIPJvSh/tXpeMX0nXLxhdPMWB0zDVRdmR67PqSaOe behLR1UqHF57kHnelLgFIJfvwfxRC10FGJ/Z6uARA04ZhEuSX7+BfBt23H/VuqEPkibV1tsSJwWfp VHGgNWng==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1uturm-00000007dVB-0Bn5; Wed, 03 Sep 2025 21:18:06 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1utqJ2-000000073jS-3vij for linux-arm-kernel@lists.infradead.org; Wed, 03 Sep 2025 16:25:56 +0000 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-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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