From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 101C81A76C4; Mon, 14 Oct 2024 13:11:32 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728911493; cv=none; b=eeSDxrQk8+xnUIpvuq8HzU3azwQnUMgTfDrdPo3SYqPXwfqlqDT81IzPVd/o7BVdsx4JHuKXwhrJaVot0Gqs+ZstH+NxABCTTSrgYa7FnLfD2HK6PVY9Yd/ESKetxgglUMTbXoOOgN6zsM+MzOe0/m2XiGbNh8KQIuc9/14YR+w= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728911493; c=relaxed/simple; bh=Rj0DDOED5iD2FdGYxYV+4r4tEXYq4n6Xi/0d9QAVLUc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Jv2BjvjRfhADX1K/7e1XCYeM8/kImi6/9tkXEXk90RWuefHEx1UKDuIKqtLoLMJtswZNCFzyyX9AWJ5xlJK6FwhmVYwpsev9aq9ezQwygKULDJGSLuKtF+T1pLtgxNgi25DatM6G0qfaITvVGe7t+ga4lYgeJ6HObxENxVjug6o= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=vMvBZJVO; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="vMvBZJVO" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 32D95C4CEC3; Mon, 14 Oct 2024 13:11:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728911492; bh=Rj0DDOED5iD2FdGYxYV+4r4tEXYq4n6Xi/0d9QAVLUc=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=vMvBZJVOinxsLsrPPXzSxPojzLbDfnzNQ55w0X0QwTjcMMxar0CDAK08E2JThkQpb 4cpioov/cqx2XJwdmLwC1BTnXl3vfXvrgA1ETi3RHPPFn/KFa3uZAW+joXD5HEZg+c 4U5ok631tPzwPd7hoGyNRL5ynGDynUSOamB6K2RiHfHSi/erCk9kHqPS+1U5lBuMVB r0jU8Sa0yR3rOlG2WDCJ68+YmRHtYreB6qz66TSlQdG0YMQVcdBysszRX2pWrQ1lN4 ziJbkceFmXn8rCIwx79sxsDKS6SGBNY9GisCIBFcBwGbEy+4gMh7VJcsFjn3AG+8KF uacBBUphpSFpQ== Date: Mon, 14 Oct 2024 16:07:40 +0300 From: Mike Rapoport To: Christoph Hellwig Cc: Andrew Morton , Andreas Larsson , Andy Lutomirski , Ard Biesheuvel , Arnd Bergmann , Borislav Petkov , Brian Cain , Catalin Marinas , Christophe Leroy , Dave Hansen , Dinh Nguyen , Geert Uytterhoeven , Guo Ren , Helge Deller , Huacai Chen , Ingo Molnar , Johannes Berg , John Paul Adrian Glaubitz , Kent Overstreet , "Liam R. Howlett" , Luis Chamberlain , Mark Rutland , Masami Hiramatsu , Matt Turner , Max Filippov , Michael Ellerman , Michal Simek , Oleg Nesterov , Palmer Dabbelt , Peter Zijlstra , Richard Weinberger , Russell King , Song Liu , Stafford Horne , Steven Rostedt , Thomas Bogendoerfer , Thomas Gleixner , Uladzislau Rezki , Vineet Gupta , Will Deacon , bpf@vger.kernel.org, linux-alpha@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-mm@kvack.org, linux-modules@vger.kernel.org, linux-openrisc@vger.kernel.org, linux-parisc@vger.kernel.org, linux-riscv@lists.infradead.org, linux-sh@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-trace-kernel@vger.kernel.org, linux-um@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, loongarch@lists.linux.dev, sparclinux@vger.kernel.org, x86@kernel.org Subject: Re: [PATCH v5 7/8] execmem: add support for cache of large ROX pages Message-ID: References: <20241009180816.83591-1-rppt@kernel.org> <20241009180816.83591-8-rppt@kernel.org> Precedence: bulk X-Mailing-List: linux-hexagon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On Sun, Oct 13, 2024 at 10:55:25PM -0700, Christoph Hellwig wrote: > On Sun, Oct 13, 2024 at 11:43:41AM +0300, Mike Rapoport wrote: > > > But why? That's pretty different from our normal style of arch hooks, > > > and introduces an indirect call in a security sensitive area. > > > > Will change to __weak hook. > > Isn't the callback required when using the large ROX page? I.e. > shouldn't it be an unconditional callback and not a weak override? I'll add a Kconfig option to ensure that an architecture that wants to use large ROX pages has explicit callback for that. -- Sincerely yours, Mike.