From patchwork Mon May 8 14:28:31 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anup Patel X-Patchwork-Id: 679999 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 BD87AC7EE22 for ; Mon, 8 May 2023 14:29:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234268AbjEHO3H (ORCPT ); Mon, 8 May 2023 10:29:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36150 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234486AbjEHO3D (ORCPT ); Mon, 8 May 2023 10:29:03 -0400 Received: from mail-pf1-x42b.google.com (mail-pf1-x42b.google.com [IPv6:2607:f8b0:4864:20::42b]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 31AFC18B for ; Mon, 8 May 2023 07:29:01 -0700 (PDT) Received: by mail-pf1-x42b.google.com with SMTP id d2e1a72fcca58-6438d95f447so3072869b3a.3 for ; Mon, 08 May 2023 07:29:00 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=ventanamicro.com; s=google; t=1683556140; x=1686148140; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=LF2qNorYNLRrXW28snaYMh/0mPEE++mM1Q0BSuQRSa4=; b=kcHDao+S780JBaV1TVug8QoMhZqjuxlDyLk91S1Z3S7CbJUtjYpQUJoeJmIB4KkmTS AaQLA/HqwR+8aeckGXkUsVofYU6PkE4DTFkMasE3xP2IwuQUszK3rYnt46m2fwomfnfW BAzq2z44tuRWB+IeEXwY8b5zUBiEKksmje/vDiUFlm7PdT9wj5BB+NPDeGgz7BC7VxDt 3IrQ6dkStHgY7fA53CT531zYrc4RaJwe8uv9LxKEQeyc1rPGW3iniMfU6GOPN2R9Y18i 4uY0QY2Q6k8oLiXEpyBAQTXY9c9EDyGlgSkPLWaoKaVFjesa+3ISvi9jb0JHB+MiGYXJ cYVw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1683556140; x=1686148140; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=LF2qNorYNLRrXW28snaYMh/0mPEE++mM1Q0BSuQRSa4=; b=UbnW+Enobci+afLNtCvNi0fn+3r2rvGVY3e5SDPZMDEJ06/AGViiXxWX0WygDHPihK 1JSkPnGOl0qaSg9m9C9R+KSqojpehLRfjZ/m0WB88gLtrfLPhsaSR9EAWkIN+/7PKVob 2C7YFFslsqqeC6xj/o6hogG85qG/qdlUMGetyi6zRuCFmVra2zBAl3L9PxchJfvkqIyy s3L+vYf+HZJEWhKQyuWBO7WFAGY/+Ri/p0yzAdVY8EPDr09/pgXcBA/EshwgX7FTiPI6 OQsxssFpNmMcBoKzn02jr+e70lBwA+k5bAT2axyb9KxZDDkR4/fms8kDhgArxZvIatBW oBNw== X-Gm-Message-State: AC+VfDxQObhaa/SH2h/yutszYUK78VWXr0E9TAz4g5IhuWGM6eYwRd7L AmgZMepyhk0wJ3IltJq2tO5OOw== X-Google-Smtp-Source: ACHHUZ79HQjgxg2rLlN2Li60VZ7yxkETrrybO4Lw/VSG8fE5OPE74vz3oUoA/TjdCH+4TkgRWFk3ww== X-Received: by 2002:a05:6a20:5488:b0:100:fc8d:feaf with SMTP id i8-20020a056a20548800b00100fc8dfeafmr1080471pzk.21.1683556140030; Mon, 08 May 2023 07:29:00 -0700 (PDT) Received: from anup-ubuntu-vm.localdomain ([171.76.84.206]) by smtp.gmail.com with ESMTPSA id k3-20020aa790c3000000b0063d46ec5777sm6082pfk.158.2023.05.08.07.28.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 08 May 2023 07:28:59 -0700 (PDT) From: Anup Patel To: Palmer Dabbelt , Paul Walmsley , Thomas Gleixner , Marc Zyngier , Rob Herring , Krzysztof Kozlowski , Robin Murphy , Joerg Roedel , Will Deacon , Frank Rowand Cc: Atish Patra , Andrew Jones , Anup Patel , linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, iommu@lists.linux.dev, Anup Patel Subject: [PATCH v3 00/11] Linux RISC-V AIA Support Date: Mon, 8 May 2023 19:58:31 +0530 Message-Id: <20230508142842.854564-1-apatel@ventanamicro.com> X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org The RISC-V AIA specification is now frozen as-per the RISC-V international process. The latest frozen specifcation can be found at: https://github.com/riscv/riscv-aia/releases/download/1.0-RC1/riscv-interrupts-1.0-RC1.pdf At a high-level, the AIA specification adds three things: 1) AIA CSRs - Improved local interrupt support 2) Incoming Message Signaled Interrupt Controller (IMSIC) - Per-HART MSI controller - Support MSI virtualization - Support IPI along with virtualization 3) Advanced Platform-Level Interrupt Controller (APLIC) - Wired interrupt controller - In MSI-mode, converts wired interrupt into MSIs (i.e. MSI generator) - In Direct-mode, injects external interrupts directly into HARTs For an overview of the AIA specification, refer the recent AIA virtualization talk at KVM Forum 2022: https://static.sched.com/hosted_files/kvmforum2022/a1/AIA_Virtualization_in_KVM_RISCV_final.pdf https://www.youtube.com/watch?v=r071dL8Z0yo The PATCH3 of this series conflicts with the "irqchip/riscv-intc: Add ACPI support" patch of the "Add basic ACPI support for RISC-V" series. (Refer, https://lore.kernel.org/linux-riscv/20230508115237.216337-1-sunilvl@ventanamicro.com/) To test this series, use QEMU v7.2 (or higher) and OpenSBI v1.2 (or higher). These patches can also be found in the riscv_aia_v3 branch at: https://github.com/avpatel/linux.git Changes since v2: - Rebased on Linux-6.4-rc1 - Addressed Rob's comments on DT bindings patches 4 and 8. - Addessed Marc's comments on IMSIC driver PATCH5 - Replaced use of OF apis in APLIC and IMSIC drivers with FWNODE apis this makes both drivers easily portable for ACPI support. This also removes unnecessary indirection from the APLIC and IMSIC drivers. - PATCH1 is a new patch for portability with ACPI support - PATCH2 is a new patch to fix probing in APLIC drivers for APLIC-only systems. - PATCH7 is a new patch which addresses the IOMMU DMA domain issues pointed out by SiFive Changes since v1: - Rebased on Linux-6.2-rc2 - Addressed comments on IMSIC DT bindings for PATCH4 - Use raw_spin_lock_irqsave() on ids_lock for PATCH5 - Improved MMIO alignment checks in PATCH5 to allow MMIO regions with holes. - Addressed comments on APLIC DT bindings for PATCH6 - Fixed warning splat in aplic_msi_write_msg() caused by zeroed MSI message in PATCH7 - Dropped DT property riscv,slow-ipi instead will have module parameter in future. Anup Patel (11): RISC-V: Add riscv_fw_parent_hartid() function of/irq: Set FWNODE_FLAG_BEST_EFFORT for the interrupt controller DT nodes irqchip/riscv-intc: Add support for RISC-V AIA dt-bindings: interrupt-controller: Add RISC-V incoming MSI controller irqchip: Add RISC-V incoming MSI controller driver irqchip/riscv-imsic: Add support for PCI MSI irqdomain irqchip/riscv-imsic: Improve IOMMU DMA support dt-bindings: interrupt-controller: Add RISC-V advanced PLIC irqchip: Add RISC-V advanced PLIC driver RISC-V: Select APLIC and IMSIC drivers MAINTAINERS: Add entry for RISC-V AIA drivers .../interrupt-controller/riscv,aplic.yaml | 162 +++ .../interrupt-controller/riscv,imsics.yaml | 172 +++ MAINTAINERS | 12 + arch/riscv/Kconfig | 2 + arch/riscv/include/asm/processor.h | 3 + arch/riscv/kernel/cpu.c | 12 + drivers/iommu/dma-iommu.c | 38 + drivers/irqchip/Kconfig | 20 +- drivers/irqchip/Makefile | 2 + drivers/irqchip/irq-riscv-aplic.c | 750 ++++++++++++ drivers/irqchip/irq-riscv-imsic.c | 1080 +++++++++++++++++ drivers/irqchip/irq-riscv-intc.c | 36 +- drivers/of/irq.c | 10 + include/linux/iommu.h | 6 + include/linux/irqchip/riscv-aplic.h | 119 ++ include/linux/irqchip/riscv-imsic.h | 86 ++ 16 files changed, 2503 insertions(+), 7 deletions(-) create mode 100644 Documentation/devicetree/bindings/interrupt-controller/riscv,aplic.yaml create mode 100644 Documentation/devicetree/bindings/interrupt-controller/riscv,imsics.yaml create mode 100644 drivers/irqchip/irq-riscv-aplic.c create mode 100644 drivers/irqchip/irq-riscv-imsic.c create mode 100644 include/linux/irqchip/riscv-aplic.h create mode 100644 include/linux/irqchip/riscv-imsic.h