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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 135DFC369DC for ; Mon, 28 Apr 2025 19:31:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:MIME-Version:References:In-Reply-To:Message-Id:Date:Subject:Cc: To:From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=9h/BaKRTPYdLXDxNQmGYix2G3Kidpo6pHZzmvCG51PA=; b=gEVDPzJj8Gb/ljQvUJ7xum79P2 J+UADgkvpS58go1orkUqUCxTmJBr5PUSAdIM++mbgOPE0DVycyPaNkeKC+ixVIX2XBLqp2CmruV8+ QI38CUXn25OgdSaySlXcgVrdOKyDey8yXqJzKgFCGI0KowJeSuXEOeWX7SBrRD+OIHcMoZV6rIGEB xzn/iP/p/lEqPsXerRd5Ikoe7iXa5DvoeMp21JG5GyjQ1QFJrN4NpkzLvCJaMMJK5dMAKbhw1OPTx tDsZgPs+8yrzgchdMt9rJ+S2PT1dFPpNk7LJvE/ID65EmejBMoU3UxE6el7EcoIAFD3q2bzKYINl8 Wqs456Mw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1u9UC4-00000007LbP-3DoA; Mon, 28 Apr 2025 19:31:08 +0000 Received: from tor.source.kernel.org ([2600:3c04:e001:324:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1u9U75-00000007Klx-1sPs for linux-arm-kernel@lists.infradead.org; Mon, 28 Apr 2025 19:25:59 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by tor.source.kernel.org (Postfix) with ESMTP id B8D20614AE; Mon, 28 Apr 2025 19:25:33 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9B96FC4CEE4; Mon, 28 Apr 2025 19:25:56 +0000 (UTC) From: Catalin Marinas To: linux-arm-kernel@lists.infradead.org, Will Deacon , Mark Rutland Cc: broonie@kernel.org, daniel.kiss@arm.com, maz@kernel.org, richard.sandiford@arm.com, sander.desmalen@arm.com, tamas.petz@arm.com, yury.khrustalev@arm.com Subject: Re: [PATCH] arm64/fpsimd: signal: Clear TPIDR2 when delivering signals Date: Mon, 28 Apr 2025 20:25:54 +0100 Message-Id: <174586835122.250615.2378305002313638533.b4-ty@arm.com> X-Mailer: git-send-email 2.39.5 In-Reply-To: <20250417190113.3778111-1-mark.rutland@arm.com> References: <20250417190113.3778111-1-mark.rutland@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Thu, 17 Apr 2025 20:01:13 +0100, Mark Rutland wrote: > Linux is intended to be compatible with userspace written to Arm's > AAPCS64 procedure call standard [1,2]. For the Scalable Matrix Extension > (SME), AAPCS64 was extended with a "ZA lazy saving scheme", where SME's > ZA tile is lazily callee-saved and caller-restored. In this scheme, > TPIDR2_EL0 indicates whether the ZA tile is live or has been saved by > pointing to a "TPIDR2 block" in memory, which has a "za_save_buffer" > pointer. This scheme has been implemented in GCC and LLVM, with > necessary runtime support implemented in glibc. > > [...] Applied to arm64 (for-next/sme-fixes), thanks! [1/1] arm64/fpsimd: signal: Clear TPIDR2 when delivering signals https://git.kernel.org/arm64/c/b376108e1f88 -- Catalin