From mboxrd@z Thu Jan 1 00:00:00 1970 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.subspace.kernel.org (Postfix) with ESMTPS id 0028832A3D8; Mon, 17 Nov 2025 18:51:14 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763405478; cv=none; b=uc7v0JlNIK0G+vqDLKrEuHS9PnWpCOpqw1YsJZ+lbbJGlDYE9Lg6UivZc3ci23mTX9NL+Wa6ceyMICx5MTvi6PEJxbkxa/ypPRJ8nK4jpdQ/WeAuWxA4Ab3YLt5AJOAJecitqwmMyCR5c7CetIAGABjOMqjEoQEpqkPJZbm5kQg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1763405478; c=relaxed/simple; bh=Ew0A5V3Ws+ovgaW3RBjnFeT6hkh0OU2OjbtDAgeMBeE=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=nGvaYObcbcXTp/dVeaeznY7s2ge3JH2pdh6l9iafWytBa7FpAD92ZE+auO7t6NTnzca2FJxAMvITQhQfVhveHWqoMbNvolq8THrFf21T1dil0u4+Na+g1bpuWVUheuHJbk61Q+drTIra1zvTgeqefnD8s13aWbwQvDJmbWNIaaY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=lSk8kQ2u; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="lSk8kQ2u" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Sender:Reply-To:Content-ID:Content-Description; bh=7aNsSoqL4Oh9FppblaXOE+GKfYhRL9+dtetncwBHI7I=; b=lSk8kQ2uqPCfHJcpdG530/aCCq O14UG2HC5+fxKf5XeN0v+ppv0P4u9+RBP9YpGI1a5LDxmwzUBtpGJDmS+rLQ68GNJD8f0DKvhuoy/ GQroSx1idJ6x7HDdAgVbHT5Tunx2PeqJZg5Z6kRzgJPlRf4ljfC9iXNBUAEHuIGYEote0t3nnPSuG BJoAEJNwGOCDH/5xx58ixucIcTUZhJJs1yTvdZC9DbaU/x2XjUPlV8PIfY//v+7q+IrHS2+WQcTze YkeXb0EGr5ryOu+SttJr4o7uES7Pq4mhbdO2QGFAfYg5GPWcH247xbr/4WeMPu16SoUGDN8RELLVX 16fnJYMA==; Received: from [50.53.43.113] (helo=[192.168.254.34]) by bombadil.infradead.org with esmtpsa (Exim 4.98.2 #2 (Red Hat Linux)) id 1vL4Jk-0000000Gflu-13Cq; Mon, 17 Nov 2025 18:51:12 +0000 Message-ID: <3bf1793a-2ffd-4017-b4bf-dc63f3a2a7c8@infradead.org> Date: Mon, 17 Nov 2025 10:51:11 -0800 Precedence: bulk X-Mailing-List: linux-cxl@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 3/7] lib: Support ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION To: Jonathan Cameron , Conor Dooley , Catalin Marinas , linux-cxl@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, Dan Williams , "H . Peter Anvin" , Peter Zijlstra , Andrew Morton , Arnd Bergmann , Drew Fustini , Linus Walleij , Alexandre Belloni , Krzysztof Kozlowski Cc: james.morse@arm.com, Will Deacon , Davidlohr Bueso , linuxarm@huawei.com, Yushan Wang , Lorenzo Pieralisi , Mark Rutland , Dave Hansen , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, Andy Lutomirski , Dave Jiang References: <20251117104800.2041329-1-Jonathan.Cameron@huawei.com> <20251117104800.2041329-4-Jonathan.Cameron@huawei.com> Content-Language: en-US From: Randy Dunlap In-Reply-To: <20251117104800.2041329-4-Jonathan.Cameron@huawei.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Hi, On 11/17/25 2:47 AM, Jonathan Cameron wrote: > diff --git a/lib/Kconfig b/lib/Kconfig > index e629449dd2a3..e11136d188ae 100644 > --- a/lib/Kconfig > +++ b/lib/Kconfig > @@ -542,6 +542,10 @@ config MEMREGION > config ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION > bool > > +config GENERIC_CPU_CACHE_MAINTENANCE > + bool > + select ARCH_HAS_CPU_CACHE_INVALIDATE_MEMREGION > + > config ARCH_HAS_MEMREMAP_COMPAT_ALIGN > bool Architectures and/or platforms select ARCH_HAS_*. With this change above, it becomes the only entry in lib/Kconfig that does "select ARCH_HAS_anytning". so I think this is wrong, back*wards. -- ~Randy