From patchwork Tue Jan 23 11:03:31 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lorenzo Pieralisi X-Patchwork-Id: 13527256 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 454D7C47DDB for ; Tue, 23 Jan 2024 11:04:40 +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: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:In-Reply-To:References: List-Owner; bh=K81hrBgv8yDURez6twpjxrfd6z6BbjJnZ7S6w7OCgIk=; b=EZ8QjeTmx+/P/I cSW+uKqzk9ek1V0undMaSLeG7KCQJd+lBeGmGk3dxtpBuQyUwNLVdqfJG5ZTLMtL+ZQSU9CUNCqch XNwRvRSlAm9ufQVpgtg+UsaAXWt+UWrT2I7K/nZkmQM4g4DCx7+IhvxHDzpsEgq5daJIp4Gl9p9Mb KkKMPFacqbSi/DAa535ksHvWxStVSgAcGjByhhh5bVBv6huWG7w80gAXNhHE3UF3N8kO9mpRrLgjL FYiTDnOSM5u9ZyAvXBRnGvJuuumivADrE+ckEbYdVnA1nTe1pGyhSV+k2ME6vrse3oI2fSm5Nfu/u oJizK0BKl6VkjArJ+97A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1rSEZg-00G3tO-04; Tue, 23 Jan 2024 11:04:12 +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 1rSEZd-00G3re-1s for linux-arm-kernel@lists.infradead.org; Tue, 23 Jan 2024 11:04:11 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by dfw.source.kernel.org (Postfix) with ESMTP id CF56961CD6; Tue, 23 Jan 2024 11:03:38 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E8133C32781; Tue, 23 Jan 2024 11:03:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1706007818; bh=jyHwFlf0bHE9KEIPyirMBwXPxM3oK4/6sY+55qCmc8I=; h=From:To:Cc:Subject:Date:From; b=RGmsdftYQp083L9bpv+o7IEzQPkf/M5kWaNBeIPefz9etL4hiy9Fqp9dO0FzowKvy G3f5pnPGjSC76upEzAcn9d8gG6lNTY3ApHnPUMg+qCTLPkNc7x9b2D4UUgkcIj8NJN Fxy0urhrplHdVz4yubm4ygqqUZ48b3/ASIr0OK4jxf88wO6lThPNYz5kL/0cr1dO/0 NFCWA4pWuSqrPTkCT/pFzj0R2x1YkOlr3tkaLeEfA7JyKqlcMDTg36OqdqkNtOih7H SkOgZ9ynrAHJt+my7fshXN1gm0ysABdHjOkQNTie7II2Br64TB3nq9dks9ZZLLUNNL m51Nn52L3Wm1Q== From: Lorenzo Pieralisi To: linux-kernel@vger.kernel.org Cc: Lorenzo Pieralisi , linux-arm-kernel@lists.infradead.org, linux-acpi@vger.kernel.org, acpica-devel@lists.linux.dev, Mark Rutland , Robin Murphy , "Rafael J. Wysocki" , Fang Xiang , Marc Zyngier , Robert Moore Subject: [PATCH v5 0/1] irqchip/gic-v3: Enable non-coherent GIC designs probing Date: Tue, 23 Jan 2024 12:03:31 +0100 Message-Id: <20240123110332.112797-1-lpieralisi@kernel.org> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240123_030409_701496_F262B286 X-CRM114-Status: GOOD ( 11.61 ) 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 This series is v5 of previous series: v4: https://lore.kernel.org/all/20231227110038.55453-1-lpieralisi@kernel.org v3: https://lore.kernel.org/all/20231006125929.48591-1-lpieralisi@kernel.org v2: https://lore.kernel.org/all/20230906094139.16032-1-lpieralisi@kernel.org v1: https://lore.kernel.org/all/20230905104721.52199-1-lpieralisi@kernel.org v4 -> v5 - ACPICA patches merged for v6.8 - Refactored ACPI parsing code according to review - Rebased against v6.8-rc1 v3 -> v4: - Dropped patches [1-3], already merged - Added Linuxized ACPICA changes accepted upstream - Rebased against v6.7-rc3 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 (1): irqchip/gic-v3: Enable non-coherent redistributors/ITSes ACPI probing drivers/acpi/processor_core.c | 15 +++++++++++++++ drivers/irqchip/irq-gic-v3-its.c | 4 ++++ drivers/irqchip/irq-gic-v3.c | 9 +++++++++ include/linux/acpi.h | 3 +++ 4 files changed, 31 insertions(+)