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 53A46278E60; Mon, 19 May 2025 12:57:32 +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=1747659455; cv=none; b=RY9hXLCOm24hPKpG5Kr8WlC8Z2unopalnvpRnLTDeaZBuv2AWPdt6gU1z2sE4BdODHMK3hFgAe8QhaCSqd6Ta65MkC0l0URBZ6n/IIN7LuV/lTWzheOaNmwF06K1eyfqjQUgkTN7mQ5Ed88ALQlIOGMZzJrmnlemsWlcDMvsNAI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1747659455; c=relaxed/simple; bh=gXpTYgvGTAJG68tcffNCQMuQVt48NcFXktn/s8H7oeo=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=EGLpy1Mc10o1ChR1BxgyImE010B4NhYfbCGMFv2oHBS32JDCWF01abetKGBgKp9jycR+T2o343rdJYb9ibSrGI3NFroWkhKZfnbX3WHEPrsCR9BUXm2KI6EBLQzEyL2dNP4EkNgq7SYvIRebFGvbRJy3iYCt5/BX2pOULLMiT20= 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 309091655; Mon, 19 May 2025 05:57:19 -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 64BCE3F6A8; Mon, 19 May 2025 05:57:29 -0700 (PDT) Date: Mon, 19 May 2025 13:57:23 +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=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: On Fri, May 16, 2025 at 09:53:36AM -0700, Song Liu wrote: > On Thu, Apr 10, 2025 at 8:17 AM Petr Mladek wrote: > > > [...] > > > > > > [1] https://lore.kernel.org/live-patching/20250127213310.2496133-1-wnliu@google.com/ > > > [2] https://lore.kernel.org/live-patching/20250129232936.1795412-1-song@kernel.org/ > > > [3] https://sourceware.org/bugzilla/show_bug.cgi?id=32589 > > > [4] https://lore.kernel.org/linux-arm-kernel/20241017092538.1859841-1-mark.rutland@arm.com/ > > > > > > Changes v2 => v3: > > > 1. Remove a redundant check for -ENOENT. (Josh Poimboeuf) > > > 2. Add Tested-by and Acked-by on v1. (I forgot to add them in v2.) > > > > The approach and both patches look reasonable: > > > > Reviewed-by: Petr Mladek > > > > Is anyone, Arm people, Mark, against pushing this into linux-next, > > please? > > Ping. > > 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. Hi; apologies for the delay -- my time had been consumed by FPSIMD/SVE/SME fixes and related non-upstream stuff for the last few weeks, and now I'm catching up. For the stacktrace side, I'm happy with enabling this without sframe, and I hase some minor nits which we can either fix up now or as a follow-up. I'll cover those in another reply, and chase up the module / code-patching bit shortly. Mark. > Thanks, > Song > > [1] https://lore.kernel.org/linux-arm-kernel/20250412010940.1686376-1-dylanbhatch@google.com/