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=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,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 7B7A3C433DB for ; Fri, 26 Feb 2021 20:11:20 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) (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 1809064F22 for ; Fri, 26 Feb 2021 20:11:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1809064F22 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id AE4526F9C8; Fri, 26 Feb 2021 20:11:19 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id QxaTLN8chtzs; Fri, 26 Feb 2021 20:11:18 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp3.osuosl.org (Postfix) with ESMTP id 7AB9C6F9B6; Fri, 26 Feb 2021 20:11:18 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 65B42C0014; Fri, 26 Feb 2021 20:11:18 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id A6B8FC000A for ; Fri, 26 Feb 2021 20:11:16 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id 948146F9C0 for ; Fri, 26 Feb 2021 20:11:16 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id 8Qi_ESq20Qlk for ; Fri, 26 Feb 2021 20:11:15 +0000 (UTC) X-Greylist: domain auto-whitelisted by SQLgrey-1.8.0 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by smtp3.osuosl.org (Postfix) with ESMTPS id 6D2BA6F99F for ; Fri, 26 Feb 2021 20:11:15 +0000 (UTC) IronPort-SDR: g1nsOw7iZ5+nXHAOje7pvkFN/k6jvtaiCevm5HD1Ecaq0JimW7/xnAoO7w25jq+Bta46jnIage xxxWTWsBFKcA== X-IronPort-AV: E=McAfee;i="6000,8403,9907"; a="185298054" X-IronPort-AV: E=Sophos;i="5.81,209,1610438400"; d="scan'208";a="185298054" Received: from orsmga008.jf.intel.com ([10.7.209.65]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Feb 2021 12:11:13 -0800 IronPort-SDR: y7CQvh0OBMkfU1WnZvVOq3OpfLMKf9+PoRB9UzpxcEbdVh/52C0uVg1LfVfikdX5NAtCQdJ4a1 G117bxFFcWmw== X-IronPort-AV: E=Sophos;i="5.81,209,1610438400"; d="scan'208";a="405109444" Received: from megha-z97x-ud7-th.sc.intel.com ([143.183.85.154]) by orsmga008-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-SHA; 26 Feb 2021 12:11:13 -0800 From: Megha Dey To: tglx@linutronix.de Subject: [Patch V2 08/13] genirq: Set auxiliary data for an interrupt Date: Fri, 26 Feb 2021 12:11:12 -0800 Message-Id: <1614370277-23235-9-git-send-email-megha.dey@intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1614370277-23235-1-git-send-email-megha.dey@intel.com> References: <1614370277-23235-1-git-send-email-megha.dey@intel.com> Cc: alex.williamson@redhat.com, kevin.tian@intel.com, tony.luck@intel.com, dave.jiang@intel.com, ashok.raj@intel.com, kvm@vger.kernel.org, ravi.v.shankar@intel.com, maz@kernel.org, x86@kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, jgg@mellanox.com, megha.dey@intel.com, linux-pci@vger.kernel.org, bhelgaas@google.com, dan.j.williams@intel.com, dwmw@amazon.co.uk X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" Introduce a new function pointer in the irq_chip structure(irq_set_auxdata) which is responsible for updating data which is stored in a shared register or data storage. For example, the idxd driver uses the auxiliary data API to enable/set and disable PASID field that is in the IMS entry (introduced in a later patch) and that data are not typically present in MSI entry. Reviewed-by: Tony Luck Signed-off-by: Megha Dey --- include/linux/interrupt.h | 2 ++ include/linux/irq.h | 4 ++++ kernel/irq/manage.c | 32 ++++++++++++++++++++++++++++++++ 3 files changed, 38 insertions(+) diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h index 967e257..461ed1c 100644 --- a/include/linux/interrupt.h +++ b/include/linux/interrupt.h @@ -496,6 +496,8 @@ extern int irq_get_irqchip_state(unsigned int irq, enum irqchip_irq_state which, extern int irq_set_irqchip_state(unsigned int irq, enum irqchip_irq_state which, bool state); +int irq_set_auxdata(unsigned int irq, unsigned int which, u64 val); + #ifdef CONFIG_IRQ_FORCED_THREADING # ifdef CONFIG_PREEMPT_RT # define force_irqthreads (true) diff --git a/include/linux/irq.h b/include/linux/irq.h index 2efde6a..fc19f32 100644 --- a/include/linux/irq.h +++ b/include/linux/irq.h @@ -491,6 +491,8 @@ static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d) * irq_request_resources * @irq_compose_msi_msg: optional to compose message content for MSI * @irq_write_msi_msg: optional to write message content for MSI + * @irq_set_auxdata: Optional function to update auxiliary data e.g. in + * shared registers * @irq_get_irqchip_state: return the internal state of an interrupt * @irq_set_irqchip_state: set the internal state of a interrupt * @irq_set_vcpu_affinity: optional to target a vCPU in a virtual machine @@ -538,6 +540,8 @@ struct irq_chip { void (*irq_compose_msi_msg)(struct irq_data *data, struct msi_msg *msg); void (*irq_write_msi_msg)(struct irq_data *data, struct msi_msg *msg); + int (*irq_set_auxdata)(struct irq_data *data, unsigned int which, u64 auxval); + int (*irq_get_irqchip_state)(struct irq_data *data, enum irqchip_irq_state which, bool *state); int (*irq_set_irqchip_state)(struct irq_data *data, enum irqchip_irq_state which, bool state); diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c index 85ede4e..68ff559 100644 --- a/kernel/irq/manage.c +++ b/kernel/irq/manage.c @@ -2860,3 +2860,35 @@ bool irq_check_status_bit(unsigned int irq, unsigned int bitmask) return res; } EXPORT_SYMBOL_GPL(irq_check_status_bit); + +/** + * irq_set_auxdata - Set auxiliary data + * @irq: Interrupt to update + * @which: Selector which data to update + * @auxval: Auxiliary data value + * + * Function to update auxiliary data for an interrupt, e.g. to update data + * which is stored in a shared register or data storage (e.g. IMS). + */ +int irq_set_auxdata(unsigned int irq, unsigned int which, u64 val) +{ + struct irq_desc *desc; + struct irq_data *data; + unsigned long flags; + int res = -ENODEV; + + desc = irq_get_desc_buslock(irq, &flags, 0); + if (!desc) + return -EINVAL; + + for (data = &desc->irq_data; data; data = irqd_get_parent_data(data)) { + if (data->chip->irq_set_auxdata) { + res = data->chip->irq_set_auxdata(data, which, val); + break; + } + } + + irq_put_desc_busunlock(desc, flags); + return res; +} +EXPORT_SYMBOL_GPL(irq_set_auxdata); -- 2.7.4 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu