From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by smtp.lore.kernel.org (Postfix) with ESMTP id 33268CA0ED3 for ; Mon, 2 Sep 2024 18:55:19 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id A6E828D00FE; Mon, 2 Sep 2024 14:55:18 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 9FAF48D00E7; Mon, 2 Sep 2024 14:55:18 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 870FB8D00FE; Mon, 2 Sep 2024 14:55:18 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0016.hostedemail.com [216.40.44.16]) by kanga.kvack.org (Postfix) with ESMTP id 68E4E8D00E7 for ; Mon, 2 Sep 2024 14:55:18 -0400 (EDT) Received: from smtpin22.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay02.hostedemail.com (Postfix) with ESMTP id CCFBE121F0E for ; Mon, 2 Sep 2024 18:55:17 +0000 (UTC) X-FDA: 82520701074.22.899FA4D Received: from nyc.source.kernel.org (nyc.source.kernel.org [147.75.193.91]) by imf16.hostedemail.com (Postfix) with ESMTP id 4A31D18000C for ; Mon, 2 Sep 2024 18:55:16 +0000 (UTC) Authentication-Results: imf16.hostedemail.com; dkim=none; spf=pass (imf16.hostedemail.com: domain of cmarinas@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=cmarinas@kernel.org; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none) ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1725303242; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=F3rkvN+biVpHXTdPPI4X2vuZzz7+9szY/+I2NS28Njs=; b=JPnkIMXJxChXwBK6UE1pJ2aOpTMbGV88Ss6RLJE4WRA3EDZeCTcm9bzMFKxwvpCvID9UUZ SpMy+fpalx/ujsoy0SW2tRJCH8Fxm1A4SqIxgJFZp/L6YwS94I5IJhctEw4mKwk/PwHuVS wZmorbHllj0/0lFssLgc2haOGw1OGjA= ARC-Authentication-Results: i=1; imf16.hostedemail.com; dkim=none; spf=pass (imf16.hostedemail.com: domain of cmarinas@kernel.org designates 147.75.193.91 as permitted sender) smtp.mailfrom=cmarinas@kernel.org; dmarc=fail reason="SPF not aligned (relaxed), No valid DKIM" header.from=arm.com (policy=none) ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1725303242; a=rsa-sha256; cv=none; b=qqsZa4uGQ7g991anSpFAVc1m8olbNWVRm36+qIJXK/QD0GJwDxGUQCEip9p0CkEh8KbpMa gsvVvgkReyX/ngKAhUdEWby4CFor2LOZwlHItPxoWATuJEDtUlE0gkkgX2kPWbPyThVYc2 0SxoiXcd/95cps1ukUHDee8ajZrwjag= Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by nyc.source.kernel.org (Postfix) with ESMTP id 613D9A4106A; Mon, 2 Sep 2024 18:55:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6AB9EC4CEC2; Mon, 2 Sep 2024 18:55:09 +0000 (UTC) Date: Mon, 2 Sep 2024 19:55:07 +0100 From: Catalin Marinas To: Mark Brown Cc: Will Deacon , Jonathan Corbet , Andrew Morton , Marc Zyngier , Oliver Upton , James Morse , Suzuki K Poulose , Arnd Bergmann , Oleg Nesterov , Eric Biederman , Shuah Khan , "Rick P. Edgecombe" , Deepak Gupta , Ard Biesheuvel , Szabolcs Nagy , Kees Cook , "H.J. Lu" , Paul Walmsley , Palmer Dabbelt , Albert Ou , Florian Weimer , Christian Brauner , Thiago Jung Bauermann , Ross Burton , Yury Khrustalev , Wilco Dijkstra , linux-arm-kernel@lists.infradead.org, linux-doc@vger.kernel.org, kvmarm@lists.linux.dev, linux-fsdevel@vger.kernel.org, linux-arch@vger.kernel.org, linux-mm@kvack.org, linux-kselftest@vger.kernel.org, linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org Subject: Re: [PATCH v12 25/39] arm64/signal: Expose GCS state in signal frames Message-ID: References: <20240829-arm64-gcs-v12-0-42fec947436a@kernel.org> <20240829-arm64-gcs-v12-25-42fec947436a@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240829-arm64-gcs-v12-25-42fec947436a@kernel.org> X-Stat-Signature: 8gwz5nogtwmxx4st6dbgk7nromwzak39 X-Rspam-User: X-Rspamd-Queue-Id: 4A31D18000C X-Rspamd-Server: rspam02 X-HE-Tag: 1725303316-356372 X-HE-Meta: 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 suNAflHB 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 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Thu, Aug 29, 2024 at 12:27:41AM +0100, Mark Brown wrote: > Add a context for the GCS state and include it in the signal context when > running on a system that supports GCS. We reuse the same flags that the > prctl() uses to specify which GCS features are enabled and also provide the > current GCS pointer. > > We do not support enabling GCS via signal return, there is a conflict > between specifying GCSPR_EL0 and allocation of a new GCS and this is not > an ancticipated use case. We also enforce GCS configuration locking on > signal return. > > Signed-off-by: Mark Brown It looks fine to me now. Reviewed-by: Catalin Marinas