From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 CAC2B2F0C62 for ; Tue, 11 Aug 2026 14:55:05 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786460114; cv=none; b=eisujSKuv+hqwo6DzhMEiwKfcKkGbeCB/6CvCLX7/2duKvizoGfkUuLpMJE2bmfEWoTjAHu8IF0RyKndm/Udq04/6hQ6HI8NNCPrYt6X4/no50LEhfPqZv5oWZ/fyVGbEwMSNL8o+BWefjCsmCq6XeEYka1D2wpu1m8J3yct2tk= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1786460114; c=relaxed/simple; bh=2W+2E3kxX9RqkNVUXIksi4e30rLCNJWQa9AfKTgPBjE=; h=Date:Message-ID:From:To:Cc:Subject:In-Reply-To:References: MIME-Version:Content-Type; b=ekDQ0puCST6lzE2GSrdgTn3n5OwDfjFKPKYxShZT1T2Sl34EEx1JZEZuVaE7JW/6J0APssi2JD7ZX63RXTxIBm3xPKKGEuyu/BMCrSpGO9VF3AsSKFxb247jNaqmsG2iyZQzPCQVG51L/tcIkInXwIF2Row0IET+XljDbr9xgeI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=k8LODHFV; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="k8LODHFV" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8DFD61F000E9; Tue, 11 Aug 2026 14:55:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1786460102; bh=y82Z6id1SOQxi2pM7J/I6X9APP/ghNhSFN4fEVhxHJs=; h=Date:From:To:Cc:Subject:In-Reply-To:References; b=k8LODHFVwOUSby+SQHM0QQec2fRyVLFh4x6NfwxnxbU+o5czS0lKpaCkdFc4nTyXh KEh3pWB8crsQMWvevGQ0RtMGtV4AwnFCj4GUKZOyV6N2SziaDXfQeZ+I7mg57pNgbQ sg556L93kYtOE80laBL/qYST6E8vrn+6Cot/gxMlcUTe7rQd/55MP1eeY8R7ZfPqJg llTj/0FTmJFjFdhsF0OEJ6NI8ZRybNMEs2PlLRys2rAwjh5JvD+hgmT8KcbjF5QPxv qeqZol8WD8zy59wFbOZluQdHDLy4H9WJhkVMRFdpFuQQIKwcK2NzXhQGk1OGHTr+HV tQDkiz1ZODR7g== Received: from sofa.misterjones.org ([185.219.108.64] helo=goblin-girl.misterjones.org) by disco-boy.misterjones.org with esmtpsa (TLS1.3) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (Exim 4.98.2) (envelope-from ) id 1wtnsa-0000000EYOc-1Dpv; Tue, 11 Aug 2026 14:55:00 +0000 Date: Tue, 11 Aug 2026 15:54:59 +0100 Message-ID: <86ldac1zcs.wl-maz@kernel.org> From: Marc Zyngier To: Will Deacon Cc: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Arnd Bergmann , Ard Biesheuvel , Eric Biggers , Daniel Borkmann , Catalin Marinas , Alexei Starovoitov , Oliver Upton , Herbert Xu Subject: Re: [PATCH 00/12] arm64: Remove unused big-endian support In-Reply-To: <20260811140132.22778-1-will@kernel.org> References: <20260811140132.22778-1-will@kernel.org> User-Agent: Wanderlust/2.15.9 (Almost Unreal) SEMI-EPG/1.14.7 (Harue) FLIM-LB/1.14.9 (=?UTF-8?B?R29qxY0=?=) APEL-LB/10.8 EasyPG/1.0.0 Emacs/30.1 (aarch64-unknown-linux-gnu) MULE/6.0 (HANACHIRUSATO) Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 (generated by SEMI-EPG 1.14.7 - "Harue") Content-Type: text/plain; charset=US-ASCII X-SA-Exim-Connect-IP: 185.219.108.64 X-SA-Exim-Rcpt-To: will@kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, arnd@arndb.de, ardb@kernel.org, ebiggers@kernel.org, daniel@iogearbox.net, catalin.marinas@arm.com, ast@kernel.org, oupton@kernel.org, herbert@gondor.apana.org.au X-SA-Exim-Mail-From: maz@kernel.org X-SA-Exim-Scanned: No (on disco-boy.misterjones.org); SAEximRunCond expanded to false On Tue, 11 Aug 2026 15:01:19 +0100, Will Deacon wrote: > > Hi folks, > > Big-endian support on arm64 (CONFIG_CPU_BIG_ENDIAN) has depended on > BROKEN since 1cf89b6bf660 ("arm64: Kconfig: Make CPU_BIG_ENDIAN depend > on BROKEN") and has already seen some clean-up patches removing some of > the unused support code (e.g. 5276ea17a23c ("lib/crc: arm64: Assume a > little-endian kernel")). > > Finish the job, and remove the remaining big-endian support code from > arm64. Note that the SETEND emulation for 32-bit tasks remains and so > some of the mixed-endian EL0 helpers are retained. > > I've broken this down into fairly coarse chunks, as it seemed a lot > easier to manage than one giant patch (even with the Kconfig being > effectively disabled already) and not all of it is just mindless > deletion. Despite that, I'm anticipating the whole thing going via the > arm64 tree. FWIW: Acked-by: Marc Zyngier M. -- Without deviation from the norm, progress is not possible.