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 8E2B8E81DE9 for ; Fri, 6 Oct 2023 13:00:15 +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=Pfw30atiVp9pHhhkziKoS9vL6gbHzm7VNW3D+Uoc210=; b=4oAJwTS9pNEcz4 9FWfAzR7499tFgNxpdfgJOAV2YyXtokqVeR0L7iyCr4/YZ51LAWFzR9f4QvzaYCnbfsyigQvxZ1lf b0Sv8jZdAEM/X2ussr7PmD2BtumApf+jj/RKzOhFhwz/C6wWEtlNUIxyhAHeK7iNQDfdjtpydck3O 1FKVhVwlUfoueUrvKzh2Pnxm/67Neb78muQB7J0kNQpeVqF1mvJPJz3ye7z/8UlvFVNJsca5FLf6M yrhXOwX+Ka3F26w042DncUGwpUow6/r+xOETO2sjMXXJorASscoG/nCog/+i1eISGllkHsvSgdwbW RzQKn9s2Mi0LbfRVFWqw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qokQh-005phS-2L; Fri, 06 Oct 2023 12:59:43 +0000 Received: from dfw.source.kernel.org ([139.178.84.217]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qokQf-005pgC-0L for linux-arm-kernel@lists.infradead.org; Fri, 06 Oct 2023 12:59:42 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id 3F76B61D58; Fri, 6 Oct 2023 12:59:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6F24AC433C8; Fri, 6 Oct 2023 12:59:34 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1696597177; bh=4MA/LskURMEJ12KVbP+fP6rhRzcvwd/Y3VAARsbtgKE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=bETbu+rA1puRoxryATnjVCGhe6ye4E0ESqOWM6iYAC/DHD1zut2RX78JHqc+hYyGD 7z2fo359Izt9OJ6Hs+5nywrwiZ9aa/o4oMbrsFy1GIHGEfRk/LmdxFIrsJsU1uIArh rDdSMpM6jmotdHt3qsJXrcIYljGLxAUhLLvdrELcASS5Cs3JVXdvbXUbpats7CgkEC dvbaWN4pbyoqOkvFo7ZHQgSMDQv2qyVORbjMuqEA5VGAI8Bg80N522iXxKGc1Ll9c7 obD9dwFN/dGaGqIOarT0IeFfTcKpMdf9iRq05P2TmVklXSHoZobiMFEGOZa/vvrc9c uekebDszGTMxQ== From: Lorenzo Pieralisi To: linux-kernel@vger.kernel.org Cc: Lorenzo Pieralisi , linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-acpi@vger.kernel.org, Mark Rutland , Robin Murphy , "Rafael J. Wysocki" , Rob Herring , Fang Xiang , Marc Zyngier Subject: [PATCH v3 0/5] irqchip/gic-v3: Enable non-coherent GIC designs probing Date: Fri, 6 Oct 2023 14:59:24 +0200 Message-Id: <20231006125929.48591-1-lpieralisi@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230905104721.52199-1-lpieralisi@kernel.org> References: <20230905104721.52199-1-lpieralisi@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20231006_055941_247938_9A25DFE8 X-CRM114-Status: GOOD ( 13.64 ) 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 This series is v3 of previous series: v2: https://lore.kernel.org/all/20230906094139.16032-1-lpieralisi@kernel.org v1: https://lore.kernel.org/all/20230905104721.52199-1-lpieralisi@kernel.org v2 -> v3: - Added ACPICA temporary changes and ACPI changes to implement ECR https://bugzilla.tianocore.org/show_bug.cgi?id=4557 - ACPI changes are for testing purposes - subject to ECR code first approval v1 -> v2: - Updated DT bindings as per feedback - Updated patch[2] to use GIC quirks infrastructure Original cover letter --- The GICv3 architecture specifications provide a means for the system programmer to set the shareability and cacheability attributes the GIC components (redistributors and ITSes) use to drive memory transactions. Albeit the architecture give control over shareability/cacheability memory transactions attributes (and barriers), it is allowed to connect the GIC interconnect ports to non-coherent memory ports on the interconnect, basically tying off shareability/cacheability "wires" and de-facto making the redistributors and ITSes non-coherent memory observers. This series aims at starting a discussion over a possible solution to this problem, by adding to the GIC device tree bindings the standard dma-noncoherent property. The GIC driver uses the property to force the redistributors and ITSes shareability attributes to non-shareable, which consequently forces the driver to use CMOs on GIC memory tables. On ARM DT DMA is default non-coherent, so the GIC driver can't rely on the generic DT dma-coherent/non-coherent property management layer (of_dma_is_coherent()) which would default all GIC designs in the field as non-coherent; it has to rely on ad-hoc dma-noncoherent property handling. When a consistent approach is agreed upon for DT an equivalent binding will be put forward for ACPI based systems. Lorenzo Pieralisi (4): dt-bindings: interrupt-controller: arm,gic-v3: Add dma-noncoherent property irqchip/gic-v3: Enable non-coherent redistributors/ITSes DT probing ACPICA: Add new MADT GICC/GICR/ITS flags handling [code first] irqchip/gic-v3: Enable non-coherent redistributors/ITSes ACPI probing Marc Zyngier (1): irqchip/gic-v3-its: Split allocation from initialisation of its_node .../interrupt-controller/arm,gic-v3.yaml | 12 ++ drivers/acpi/processor_core.c | 21 +++ drivers/irqchip/irq-gic-common.h | 12 ++ drivers/irqchip/irq-gic-v3-its.c | 174 +++++++++++------- drivers/irqchip/irq-gic-v3.c | 22 +++ include/acpi/actbl2.h | 11 +- include/linux/acpi.h | 3 + 7 files changed, 189 insertions(+), 66 deletions(-) -- 2.34.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel