From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id CBC23283FDC; Mon, 19 May 2025 16:40:39 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747672841; cv=none; b=IEPAHkPOZulpnY59SObAPH+Br4eARB4nVyypR7wsnTaGOQMzmZP7ZCeXOG051UArA+sIdwNkUKRkdxBeCqtm/tph7HUb0JvU2XPUvrQsWSPSh2meahdB/ZZvJ74jVZL3LRxG9z4vwYtzbp4Nitl/nHYMLuIpnMYSv2kTXbXtugU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747672841; c=relaxed/simple; bh=ok3hf+ijd2mlfIKeyHy3icFw3GSdz7RItoOTVT8fpzI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=lH3z+PCDzAAOKqvqLEbNv/Ues29yyKrSo2FKt0Shh/zjB5rrCl73aocHqO2I3LduJk50KzkXUsz48wVRXQe8f3IqytumXU0/nMvY9QJ6U90sVd7qnXkt2pQS7NPVVx0Tl8oRfvRU3kLzAFUAiwxV/dVyul1cBGJpXU06RJx+TzM= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id F0299113E; Mon, 19 May 2025 09:40:25 -0700 (PDT) Received: from J2N7QTR9R3 (usa-sjc-imap-foss1.foss.arm.com [10.121.207.14]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2F6E93F5A1; Mon, 19 May 2025 09:40:36 -0700 (PDT) Date: Mon, 19 May 2025 17:40:33 +0100 From: Mark Rutland To: Song Liu Cc: Petr Mladek , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linux-toolchains@vger.kernel.org, live-patching@vger.kernel.org, indu.bhagat@oracle.com, puranjay@kernel.org, wnliu@google.com, irogers@google.com, joe.lawrence@redhat.com, jpoimboe@kernel.org, peterz@infradead.org, roman.gushchin@linux.dev, rostedt@goodmis.org, will@kernel.org, kernel-team@meta.com Subject: Re: [PATCH v3 0/2] arm64: livepatch: Enable livepatch without sframe Message-ID: References: <20250320171559.3423224-1-song@kernel.org> Precedence: bulk X-Mailing-List: linux-toolchains@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 Fri, May 16, 2025 at 09:53:36AM -0700, Song Liu wrote: > ARM folks, please share your thoughts on this work. To fully support > livepatching of kernel modules, we also need [1]. We hope we can > land this in the 6.16 kernel. > > Thanks, > Song > > [1] https://lore.kernel.org/linux-arm-kernel/20250412010940.1686376-1-dylanbhatch@google.com/ I've had a quick look at [1], and IIUC that's a hard prerequisite for livepatching, as without it the kernel *will* crash if it attempts a late module relocation. Given that, I don't think that we can take patch 2 until Will's comments on [1] have been addressed, but I think that we could take patch 1 (with fixups) as per my other reply. Mark.