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 X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 54CD8C169C4 for ; Thu, 31 Jan 2019 15:01:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 26EF2218D3 for ; Thu, 31 Jan 2019 15:01:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732621AbfAaO7g (ORCPT ); Thu, 31 Jan 2019 09:59:36 -0500 Received: from foss.arm.com ([217.140.101.70]:45532 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732571AbfAaO7d (ORCPT ); Thu, 31 Jan 2019 09:59:33 -0500 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E97CD15AD; Thu, 31 Jan 2019 06:59:32 -0800 (PST) Received: from e112298-lin.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id CCEF43F59C; Thu, 31 Jan 2019 06:59:30 -0800 (PST) From: Julien Thierry To: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org, daniel.thompson@linaro.org, joel@joelfernandes.org, marc.zyngier@arm.com, christoffer.dall@arm.com, james.morse@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, mark.rutland@arm.com, Julien Thierry , Oleg Nesterov Subject: [PATCH v10 07/25] arm64: ptrace: Provide definitions for PMR values Date: Thu, 31 Jan 2019 14:58:45 +0000 Message-Id: <1548946743-38979-8-git-send-email-julien.thierry@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1548946743-38979-1-git-send-email-julien.thierry@arm.com> References: <1548946743-38979-1-git-send-email-julien.thierry@arm.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Introduce fixed values for PMR that are going to be used to mask and unmask interrupts by priority. The current priority given to GIC interrupts is 0xa0, so clearing PMR's most significant bit is enough to mask interrupts. Signed-off-by: Julien Thierry Suggested-by: Daniel Thompson Acked-by: Catalin Marinas Acked-by: Marc Zyngier Cc: Oleg Nesterov Cc: Catalin Marinas Cc: Will Deacon --- arch/arm64/include/asm/ptrace.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h index fce22c4..8b131bc 100644 --- a/arch/arm64/include/asm/ptrace.h +++ b/arch/arm64/include/asm/ptrace.h @@ -25,6 +25,18 @@ #define CurrentEL_EL1 (1 << 2) #define CurrentEL_EL2 (2 << 2) +/* + * PMR values used to mask/unmask interrupts. + * + * GIC priority masking works as follows: if an IRQ's priority is a higher value + * than the value held in PMR, that IRQ is masked. Lowering the value of PMR + * means masking more IRQs (or at least that the same IRQs remain masked). + * + * To mask interrupts, we clear the most significant bit of PMR. + */ +#define GIC_PRIO_IRQON 0xf0 +#define GIC_PRIO_IRQOFF (GIC_PRIO_IRQON & ~0x80) + /* Additional SPSR bits not exposed in the UABI */ #define PSR_IL_BIT (1 << 20) -- 1.9.1 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 X-Spam-Level: X-Spam-Status: No, score=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id E0778C282D9 for ; Thu, 31 Jan 2019 15:01:15 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id B6E37218AF for ; Thu, 31 Jan 2019 15:01:15 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="ei/1ZeJN" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org B6E37218AF Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=arm.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=GW8SQ7Gxs5iuJifUYdVLBhHzXyrxa9Lrc8M653k/Jsg=; b=ei/1ZeJNaQ0KYONLGKm4pL6y/K wQeOZwlAEXazcS5rlO7Xa+A5hXKODnCl/mCrkaFuCq82kBjvh1do7bDwttfA3ED/SgCqs1QtGBKDA Aolc6h8WAsIpm+BJdNpNwovfxUPMpfvn5r+SwmIwqFY0KZy/TkF7tXaeCF0FeHK+l8IGSYURYLRUb 4ftJfQEy1+xSTySDN8MIQ10EIMv2OxXOzRbj6Vjx6qxgAkysvezZDcyR9sXwM4g82hetIQE/zD6ik 27BlKmACi3bLv2vOBSMqn4Q9W6K6GYA2/B0UboZHZ7a/y7G+G6LHDP7P+/Mi+i9x73kwzd2B7X72V EsaclS6Q==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gpDq5-0000nv-4C; Thu, 31 Jan 2019 15:01:13 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1gpDoT-0006It-Ef for linux-arm-kernel@lists.infradead.org; Thu, 31 Jan 2019 14:59:36 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id E97CD15AD; Thu, 31 Jan 2019 06:59:32 -0800 (PST) Received: from e112298-lin.cambridge.arm.com (usa-sjc-imap-foss1.foss.arm.com [10.72.51.249]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id CCEF43F59C; Thu, 31 Jan 2019 06:59:30 -0800 (PST) From: Julien Thierry To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v10 07/25] arm64: ptrace: Provide definitions for PMR values Date: Thu, 31 Jan 2019 14:58:45 +0000 Message-Id: <1548946743-38979-8-git-send-email-julien.thierry@arm.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1548946743-38979-1-git-send-email-julien.thierry@arm.com> References: <1548946743-38979-1-git-send-email-julien.thierry@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190131_065934_173622_377C29F4 X-CRM114-Status: GOOD ( 10.76 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, daniel.thompson@linaro.org, Julien Thierry , marc.zyngier@arm.com, catalin.marinas@arm.com, will.deacon@arm.com, linux-kernel@vger.kernel.org, christoffer.dall@arm.com, james.morse@arm.com, Oleg Nesterov , joel@joelfernandes.org MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Introduce fixed values for PMR that are going to be used to mask and unmask interrupts by priority. The current priority given to GIC interrupts is 0xa0, so clearing PMR's most significant bit is enough to mask interrupts. Signed-off-by: Julien Thierry Suggested-by: Daniel Thompson Acked-by: Catalin Marinas Acked-by: Marc Zyngier Cc: Oleg Nesterov Cc: Catalin Marinas Cc: Will Deacon --- arch/arm64/include/asm/ptrace.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h index fce22c4..8b131bc 100644 --- a/arch/arm64/include/asm/ptrace.h +++ b/arch/arm64/include/asm/ptrace.h @@ -25,6 +25,18 @@ #define CurrentEL_EL1 (1 << 2) #define CurrentEL_EL2 (2 << 2) +/* + * PMR values used to mask/unmask interrupts. + * + * GIC priority masking works as follows: if an IRQ's priority is a higher value + * than the value held in PMR, that IRQ is masked. Lowering the value of PMR + * means masking more IRQs (or at least that the same IRQs remain masked). + * + * To mask interrupts, we clear the most significant bit of PMR. + */ +#define GIC_PRIO_IRQON 0xf0 +#define GIC_PRIO_IRQOFF (GIC_PRIO_IRQON & ~0x80) + /* Additional SPSR bits not exposed in the UABI */ #define PSR_IL_BIT (1 << 20) -- 1.9.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel