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 mm01.cs.columbia.edu (mm01.cs.columbia.edu [128.59.11.253]) by smtp.lore.kernel.org (Postfix) with ESMTP id 79A85C433FE for ; Fri, 8 Apr 2022 11:56:30 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 33BE043399; Fri, 8 Apr 2022 07:56:30 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Authentication-Results: mm01.cs.columbia.edu (amavisd-new); dkim=softfail (fail, message has been altered) header.i=@kernel.org Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 2W9P92rb9LfV; Fri, 8 Apr 2022 07:56:29 -0400 (EDT) Received: from mm01.cs.columbia.edu (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 07B964B220; Fri, 8 Apr 2022 07:56:28 -0400 (EDT) Received: from localhost (localhost [127.0.0.1]) by mm01.cs.columbia.edu (Postfix) with ESMTP id 42F684B1F4 for ; Fri, 8 Apr 2022 07:56:27 -0400 (EDT) X-Virus-Scanned: at lists.cs.columbia.edu Received: from mm01.cs.columbia.edu ([127.0.0.1]) by localhost (mm01.cs.columbia.edu [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id prYQccJdpZPw for ; Fri, 8 Apr 2022 07:56:24 -0400 (EDT) Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by mm01.cs.columbia.edu (Postfix) with ESMTPS id D39FB4B211 for ; Fri, 8 Apr 2022 07:56:24 -0400 (EDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 429E062067; Fri, 8 Apr 2022 11:56:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15DF8C385A3; Fri, 8 Apr 2022 11:56:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1649418983; bh=IgQmCXJBE2ycdQoQEp6rpnOwcUiocLTkhM4XALt/TLE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s9yXSip+T+rwF0geLqmnSBEhw+LCiazFF+dgKT08KCU41j19JN+45qBbnIFs1JAHK JOoOYYZTXw8aswy0aV3Ez63JwNojzv7AS9rOg7rOrCU1Ge/JBrulEgnE+q5CK/uEsK 9Llr66GXzCQXWcBNqjrhF+lDmlUbrjbT+Ro3DClIz/QjyHTGqJ+XstxVJq3TvQXm6n THESjugbcj6uap7c7BD45fye3nijBwlZo+yf3amgzaGWEE1BRAFGNxLTQrCuD07QWs 1KjFM8OF8kRiNcNC8OS+rTtVgKq/XcPrrJYNj4UEFOORVUhf+tJ0cTkiqk1LK4fpd2 rLT3C8D/2SUMw== From: Mark Brown To: Catalin Marinas , Will Deacon , Marc Zyngier , Shuah Khan , Shuah Khan Subject: [PATCH v13 17/39] arm64/sme: Disable ZA and streaming mode when handling signals Date: Fri, 8 Apr 2022 12:43:06 +0100 Message-Id: <20220408114328.1401034-18-broonie@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220408114328.1401034-1-broonie@kernel.org> References: <20220408114328.1401034-1-broonie@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1047; h=from:subject; bh=IgQmCXJBE2ycdQoQEp6rpnOwcUiocLTkhM4XALt/TLE=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBiUB/MNGzbGwQFros5j+TYXHHtF3i8QyvzP5YLP2js TRShsaKJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCYlAfzAAKCRAk1otyXVSH0DR/CA CF/lS7py2hHrn3w+TGcIG2waMCPpXXtaw5A3PWm8shZgXJKLmDDspNsvxvmRmIYQzp0iAFDQaLlz1a NBhO9Q9rUd32XfGSa2o12gt0my8bLZt3MYuMZAKm1EhB7wy6+NVBvhaM1grXU4nw0ZQh28AgnZ4kSa hY5jEU7FPK69LoO5QyYOj8B0LxcDNWuG2GHeetXAZxR3bRqzL++R4FuotgZRRYooE2ipmjHQtfuYR7 2rKivu72y3+8k19kakrat3KnSUM7lKE0MrL3xVRFbFjYd8fBxmHHWD9JvikmQ7bRjn+wDLNkObSek3 Uen/EUIpk03hZAO5VwuJGFotoPfZC7 X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Cc: Basant Kumar Dwivedi , Luis Machado , Szabolcs Nagy , Mark Brown , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, Alan Hayward , kvmarm@lists.cs.columbia.edu, Salil Akerkar , Luca Salabrino X-BeenThere: kvmarm@lists.cs.columbia.edu X-Mailman-Version: 2.1.14 Precedence: list List-Id: Where KVM/ARM decisions are made List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: kvmarm-bounces@lists.cs.columbia.edu Sender: kvmarm-bounces@lists.cs.columbia.edu The ABI requires that streaming mode and ZA are disabled when invoking signal handlers, do this in setup_return() when we prepare the task state for the signal handler. Signed-off-by: Mark Brown Reviewed-by: Catalin Marinas --- arch/arm64/kernel/signal.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c index 4a4122ef6f39..42efa464e46e 100644 --- a/arch/arm64/kernel/signal.c +++ b/arch/arm64/kernel/signal.c @@ -759,6 +759,13 @@ static void setup_return(struct pt_regs *regs, struct k_sigaction *ka, /* TCO (Tag Check Override) always cleared for signal handlers */ regs->pstate &= ~PSR_TCO_BIT; + /* Signal handlers are invoked with ZA and streaming mode disabled */ + if (system_supports_sme()) { + current->thread.svcr &= ~(SYS_SVCR_EL0_ZA_MASK | + SYS_SVCR_EL0_SM_MASK); + sme_smstop(); + } + if (ka->sa.sa_flags & SA_RESTORER) sigtramp = ka->sa.sa_restorer; else -- 2.30.2 _______________________________________________ kvmarm mailing list kvmarm@lists.cs.columbia.edu https://lists.cs.columbia.edu/mailman/listinfo/kvmarm 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5D2F7C433EF for ; Fri, 8 Apr 2022 11:56:32 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235295AbiDHL6c (ORCPT ); Fri, 8 Apr 2022 07:58:32 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:41590 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230191AbiDHL62 (ORCPT ); Fri, 8 Apr 2022 07:58:28 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A7D927DE39 for ; Fri, 8 Apr 2022 04:56:24 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 44A5A62068 for ; Fri, 8 Apr 2022 11:56:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15DF8C385A3; Fri, 8 Apr 2022 11:56:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1649418983; bh=IgQmCXJBE2ycdQoQEp6rpnOwcUiocLTkhM4XALt/TLE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s9yXSip+T+rwF0geLqmnSBEhw+LCiazFF+dgKT08KCU41j19JN+45qBbnIFs1JAHK JOoOYYZTXw8aswy0aV3Ez63JwNojzv7AS9rOg7rOrCU1Ge/JBrulEgnE+q5CK/uEsK 9Llr66GXzCQXWcBNqjrhF+lDmlUbrjbT+Ro3DClIz/QjyHTGqJ+XstxVJq3TvQXm6n THESjugbcj6uap7c7BD45fye3nijBwlZo+yf3amgzaGWEE1BRAFGNxLTQrCuD07QWs 1KjFM8OF8kRiNcNC8OS+rTtVgKq/XcPrrJYNj4UEFOORVUhf+tJ0cTkiqk1LK4fpd2 rLT3C8D/2SUMw== From: Mark Brown To: Catalin Marinas , Will Deacon , Marc Zyngier , Shuah Khan , Shuah Khan Cc: Alan Hayward , Luis Machado , Salil Akerkar , Basant Kumar Dwivedi , Szabolcs Nagy , James Morse , Alexandru Elisei , Suzuki K Poulose , Luca Salabrino , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, kvmarm@lists.cs.columbia.edu, Mark Brown Subject: [PATCH v13 17/39] arm64/sme: Disable ZA and streaming mode when handling signals Date: Fri, 8 Apr 2022 12:43:06 +0100 Message-Id: <20220408114328.1401034-18-broonie@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220408114328.1401034-1-broonie@kernel.org> References: <20220408114328.1401034-1-broonie@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1047; h=from:subject; bh=IgQmCXJBE2ycdQoQEp6rpnOwcUiocLTkhM4XALt/TLE=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBiUB/MNGzbGwQFros5j+TYXHHtF3i8QyvzP5YLP2js TRShsaKJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCYlAfzAAKCRAk1otyXVSH0DR/CA CF/lS7py2hHrn3w+TGcIG2waMCPpXXtaw5A3PWm8shZgXJKLmDDspNsvxvmRmIYQzp0iAFDQaLlz1a NBhO9Q9rUd32XfGSa2o12gt0my8bLZt3MYuMZAKm1EhB7wy6+NVBvhaM1grXU4nw0ZQh28AgnZ4kSa hY5jEU7FPK69LoO5QyYOj8B0LxcDNWuG2GHeetXAZxR3bRqzL++R4FuotgZRRYooE2ipmjHQtfuYR7 2rKivu72y3+8k19kakrat3KnSUM7lKE0MrL3xVRFbFjYd8fBxmHHWD9JvikmQ7bRjn+wDLNkObSek3 Uen/EUIpk03hZAO5VwuJGFotoPfZC7 X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org The ABI requires that streaming mode and ZA are disabled when invoking signal handlers, do this in setup_return() when we prepare the task state for the signal handler. Signed-off-by: Mark Brown Reviewed-by: Catalin Marinas --- arch/arm64/kernel/signal.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c index 4a4122ef6f39..42efa464e46e 100644 --- a/arch/arm64/kernel/signal.c +++ b/arch/arm64/kernel/signal.c @@ -759,6 +759,13 @@ static void setup_return(struct pt_regs *regs, struct k_sigaction *ka, /* TCO (Tag Check Override) always cleared for signal handlers */ regs->pstate &= ~PSR_TCO_BIT; + /* Signal handlers are invoked with ZA and streaming mode disabled */ + if (system_supports_sme()) { + current->thread.svcr &= ~(SYS_SVCR_EL0_ZA_MASK | + SYS_SVCR_EL0_SM_MASK); + sme_smstop(); + } + if (ka->sa.sa_flags & SA_RESTORER) sigtramp = ka->sa.sa_restorer; else -- 2.30.2 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 0CC95C433F5 for ; Fri, 8 Apr 2022 12:11:31 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id: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=PqGjTV1/AKwuKEU+OhWdp0MiskwqFZh0/ae70NqL8I8=; b=AbTAkVMzPE5/sr Wepe34iPwv8a425izBzAbYIf+s+xxy4XGIyHsQMBg/Z/X1G/xTbrF6lVtRwdLDIWFw8EF01N6iAXh w9N8pYUzCOohORn/FE6OP4vbds71nQNXqDFZEDHFrlziIR6vxPZGeMdihcFjwR1HGPox+3kaWlRIi +yomS/Lwi60NromGkTHpTF3pMbm2RdMs+zcJLZX9JB2CQw9xR3aeF0qF9DePPNT4SMsJtRLPyzvsF fvZUuNW17jGp2HZrp7OPXEZ1m01EvhJDOE8FelZZ59GoojTo6c4RbNP54R8AajettIevWJejTXSbd oSoWrn9wvTm4G9tYMO0g==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1ncnRH-00Gssw-II; Fri, 08 Apr 2022 12:10:08 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1ncnE0-00Gn1T-NC for linux-arm-kernel@lists.infradead.org; Fri, 08 Apr 2022 11:56:31 +0000 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 429E062067; Fri, 8 Apr 2022 11:56:24 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 15DF8C385A3; Fri, 8 Apr 2022 11:56:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1649418983; bh=IgQmCXJBE2ycdQoQEp6rpnOwcUiocLTkhM4XALt/TLE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s9yXSip+T+rwF0geLqmnSBEhw+LCiazFF+dgKT08KCU41j19JN+45qBbnIFs1JAHK JOoOYYZTXw8aswy0aV3Ez63JwNojzv7AS9rOg7rOrCU1Ge/JBrulEgnE+q5CK/uEsK 9Llr66GXzCQXWcBNqjrhF+lDmlUbrjbT+Ro3DClIz/QjyHTGqJ+XstxVJq3TvQXm6n THESjugbcj6uap7c7BD45fye3nijBwlZo+yf3amgzaGWEE1BRAFGNxLTQrCuD07QWs 1KjFM8OF8kRiNcNC8OS+rTtVgKq/XcPrrJYNj4UEFOORVUhf+tJ0cTkiqk1LK4fpd2 rLT3C8D/2SUMw== From: Mark Brown To: Catalin Marinas , Will Deacon , Marc Zyngier , Shuah Khan , Shuah Khan Cc: Alan Hayward , Luis Machado , Salil Akerkar , Basant Kumar Dwivedi , Szabolcs Nagy , James Morse , Alexandru Elisei , Suzuki K Poulose , Luca Salabrino , linux-arm-kernel@lists.infradead.org, linux-kselftest@vger.kernel.org, kvmarm@lists.cs.columbia.edu, Mark Brown Subject: [PATCH v13 17/39] arm64/sme: Disable ZA and streaming mode when handling signals Date: Fri, 8 Apr 2022 12:43:06 +0100 Message-Id: <20220408114328.1401034-18-broonie@kernel.org> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20220408114328.1401034-1-broonie@kernel.org> References: <20220408114328.1401034-1-broonie@kernel.org> MIME-Version: 1.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1047; h=from:subject; bh=IgQmCXJBE2ycdQoQEp6rpnOwcUiocLTkhM4XALt/TLE=; b=owEBbQGS/pANAwAKASTWi3JdVIfQAcsmYgBiUB/MNGzbGwQFros5j+TYXHHtF3i8QyvzP5YLP2js TRShsaKJATMEAAEKAB0WIQSt5miqZ1cYtZ/in+ok1otyXVSH0AUCYlAfzAAKCRAk1otyXVSH0DR/CA CF/lS7py2hHrn3w+TGcIG2waMCPpXXtaw5A3PWm8shZgXJKLmDDspNsvxvmRmIYQzp0iAFDQaLlz1a NBhO9Q9rUd32XfGSa2o12gt0my8bLZt3MYuMZAKm1EhB7wy6+NVBvhaM1grXU4nw0ZQh28AgnZ4kSa hY5jEU7FPK69LoO5QyYOj8B0LxcDNWuG2GHeetXAZxR3bRqzL++R4FuotgZRRYooE2ipmjHQtfuYR7 2rKivu72y3+8k19kakrat3KnSUM7lKE0MrL3xVRFbFjYd8fBxmHHWD9JvikmQ7bRjn+wDLNkObSek3 Uen/EUIpk03hZAO5VwuJGFotoPfZC7 X-Developer-Key: i=broonie@kernel.org; a=openpgp; fpr=3F2568AAC26998F9E813A1C5C3F436CA30F5D8EB X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20220408_045624_852864_D8C42ACE X-CRM114-Status: GOOD ( 11.70 ) 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: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org The ABI requires that streaming mode and ZA are disabled when invoking signal handlers, do this in setup_return() when we prepare the task state for the signal handler. Signed-off-by: Mark Brown Reviewed-by: Catalin Marinas --- arch/arm64/kernel/signal.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm64/kernel/signal.c b/arch/arm64/kernel/signal.c index 4a4122ef6f39..42efa464e46e 100644 --- a/arch/arm64/kernel/signal.c +++ b/arch/arm64/kernel/signal.c @@ -759,6 +759,13 @@ static void setup_return(struct pt_regs *regs, struct k_sigaction *ka, /* TCO (Tag Check Override) always cleared for signal handlers */ regs->pstate &= ~PSR_TCO_BIT; + /* Signal handlers are invoked with ZA and streaming mode disabled */ + if (system_supports_sme()) { + current->thread.svcr &= ~(SYS_SVCR_EL0_ZA_MASK | + SYS_SVCR_EL0_SM_MASK); + sme_smstop(); + } + if (ka->sa.sa_flags & SA_RESTORER) sigtramp = ka->sa.sa_restorer; else -- 2.30.2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel