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 5B9A0C3DA4A for ; Mon, 5 Aug 2024 14:52:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:From:References:Cc:To:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=pauF332H9RYtwbTh4jt8TXNF4EdtpJCWqYxBIdY4ptU=; b=3VTJZJJenbI3PhkSLxSnTEuyGl DVQTCd/csPnZBzTeTeN5FfegupyIC/gpdqFwEAevW94J4kd6gp9ZMbNf/sNnE8cuF/+V1PlhA1If0 MmqyYnuwEtSVebaphVR14wDNMG1Yiw5qj73B5rhcN/Q/NkK8RuL5udXziZj8ylhiMjh4haSLMVPLu qdQTd0FyTzIV2yvHCSMWJwr8QkqFsn5u+7+235t9z9v8Us+WRwsY4nNPl01ntuS9cKES9F3xhNIbG l6Qt7nm8YL3P8I7Nfk1L9kQbX9xgfv92gbAw23whFMG5RxG1jvoBE80vezaC0Jfl5ev/JDoj1tbN/ vw7absmw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1saz3z-0000000GCdw-0y1L; Mon, 05 Aug 2024 14:51:55 +0000 Received: from linux.microsoft.com ([13.77.154.182]) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1saz3S-0000000GCX4-1TNn for linux-arm-kernel@lists.infradead.org; Mon, 05 Aug 2024 14:51:23 +0000 Received: from [10.137.186.190] (unknown [131.107.159.62]) by linux.microsoft.com (Postfix) with ESMTPSA id 3F41B20B7165; Mon, 5 Aug 2024 07:51:18 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 3F41B20B7165 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1722869478; bh=pauF332H9RYtwbTh4jt8TXNF4EdtpJCWqYxBIdY4ptU=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=X8ffdVm0EwvH9cISLR9ZZZRKprEo04Um0VqddaKwHaaG5FXXTy/B3AVHowWL2FIkF vn6mm0I6ZO0vdpHX+1dlYa6XsD2FOGm9nrXMQFEXjkEePfTn662n16Sr99C7sAz/Ii ACauUgAQ7XzRLcxcOjk8N8fMfsudY9DdAsBUfPJI= Message-ID: <2679199c-3f73-4326-85ee-622541d26153@linux.microsoft.com> Date: Mon, 5 Aug 2024 07:51:18 -0700 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 7/7] PCI: hv: Get vPCI MSI IRQ domain from DT To: Wei Liu Cc: arnd@arndb.de, bhelgaas@google.com, bp@alien8.de, catalin.marinas@arm.com, dave.hansen@linux.intel.com, decui@microsoft.com, haiyangz@microsoft.com, hpa@zytor.com, kw@linux.com, kys@microsoft.com, lenb@kernel.org, lpieralisi@kernel.org, mingo@redhat.com, rafael@kernel.org, robh@kernel.org, tglx@linutronix.de, will@kernel.org, linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, x86@kernel.org, apais@microsoft.com, benhill@microsoft.com, ssengar@microsoft.com, sunilmut@microsoft.com, vdso@hexbites.dev References: <20240726225910.1912537-1-romank@linux.microsoft.com> <20240726225910.1912537-8-romank@linux.microsoft.com> Content-Language: en-US From: Roman Kisel In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240805_075122_612650_7D37EEA3 X-CRM114-Status: GOOD ( 27.17 ) 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 On 8/2/2024 6:20 PM, Wei Liu wrote: > On Fri, Jul 26, 2024 at 03:59:10PM -0700, Roman Kisel wrote: >> The hyperv-pci driver uses ACPI for MSI IRQ domain configuration on >> arm64. It won't be able to do that in the VTL mode where only DeviceTree >> can be used. >> >> Update the hyperv-pci driver to get vPCI MSI IRQ domain in the DeviceTree >> case, too. >> >> Signed-off-by: Roman Kisel >> --- >> drivers/hv/vmbus_drv.c | 23 +++++++----- >> drivers/pci/controller/pci-hyperv.c | 55 +++++++++++++++++++++++++++-- >> include/linux/hyperv.h | 2 ++ >> 3 files changed, 69 insertions(+), 11 deletions(-) >> >> diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c >> index 7eee7caff5f6..038bd9be64b7 100644 >> --- a/drivers/hv/vmbus_drv.c >> +++ b/drivers/hv/vmbus_drv.c >> @@ -45,7 +45,8 @@ struct vmbus_dynid { >> struct hv_vmbus_device_id id; >> }; >> >> -static struct device *hv_dev; >> +/* VMBus Root Device */ >> +static struct device *vmbus_root_device; > > You're changing the name of the variable. That should preferably be done > in a separate patch. That's going to make this patch shorter and easier > to review. > Will fix in v4, thanks! >> >> static int hyperv_cpuhp_online; >> >> @@ -80,9 +81,15 @@ static struct resource *fb_mmio; >> static struct resource *hyperv_mmio; >> static DEFINE_MUTEX(hyperv_mmio_lock); >> >> +struct device *get_vmbus_root_device(void) >> +{ >> + return vmbus_root_device; >> +} >> +EXPORT_SYMBOL_GPL(get_vmbus_root_device); > > I would like you to add "hv_" prefix to this exported symbol, or rename > it to "vmbus_get_root_device()". > >> + >> static int vmbus_exists(void) >> { >> - if (hv_dev == NULL) >> + if (vmbus_root_device == NULL) >> return -ENODEV; >> >> return 0; >> @@ -861,7 +868,7 @@ static int vmbus_dma_configure(struct device *child_device) >> * On x86/x64 coherence is assumed and these calls have no effect. >> */ >> hv_setup_dma_ops(child_device, >> - device_get_dma_attr(hv_dev) == DEV_DMA_COHERENT); >> + device_get_dma_attr(vmbus_root_device) == DEV_DMA_COHERENT); >> return 0; >> } >> >> @@ -1892,7 +1899,7 @@ int vmbus_device_register(struct hv_device *child_device_obj) >> &child_device_obj->channel->offermsg.offer.if_instance); >> >> child_device_obj->device.bus = &hv_bus; >> - child_device_obj->device.parent = hv_dev; >> + child_device_obj->device.parent = vmbus_root_device; >> child_device_obj->device.release = vmbus_device_release; >> >> child_device_obj->device.dma_parms = &child_device_obj->dma_parms; >> @@ -2253,7 +2260,7 @@ static int vmbus_acpi_add(struct platform_device *pdev) >> struct acpi_device *ancestor; >> struct acpi_device *device = ACPI_COMPANION(&pdev->dev); >> >> - hv_dev = &device->dev; >> + vmbus_root_device = &device->dev; >> >> /* >> * Older versions of Hyper-V for ARM64 fail to include the _CCA >> @@ -2342,7 +2349,7 @@ static int vmbus_device_add(struct platform_device *pdev) >> struct device_node *np = pdev->dev.of_node; >> int ret; >> >> - hv_dev = &pdev->dev; >> + vmbus_root_device = &pdev->dev; >> >> ret = of_range_parser_init(&parser, np); >> if (ret) >> @@ -2675,7 +2682,7 @@ static int __init hv_acpi_init(void) >> if (ret) >> return ret; >> >> - if (!hv_dev) { >> + if (!vmbus_root_device) { >> ret = -ENODEV; >> goto cleanup; >> } >> @@ -2706,7 +2713,7 @@ static int __init hv_acpi_init(void) >> >> cleanup: >> platform_driver_unregister(&vmbus_platform_driver); >> - hv_dev = NULL; >> + vmbus_root_device = NULL; >> return ret; >> } >> >> diff --git a/drivers/pci/controller/pci-hyperv.c b/drivers/pci/controller/pci-hyperv.c >> index 5992280e8110..cdecefd1f9bd 100644 >> --- a/drivers/pci/controller/pci-hyperv.c >> +++ b/drivers/pci/controller/pci-hyperv.c >> @@ -50,6 +50,7 @@ >> #include >> #include >> #include >> +#include >> #include >> >> /* >> @@ -887,6 +888,35 @@ static const struct irq_domain_ops hv_pci_domain_ops = { >> .activate = hv_pci_vec_irq_domain_activate, >> }; >> >> +#ifdef CONFIG_OF >> + >> +static struct irq_domain *hv_pci_of_irq_domain_parent(void) >> +{ >> + struct device_node *parent; >> + struct irq_domain *domain; >> + >> + parent = of_irq_find_parent(to_platform_device(get_vmbus_root_device())->dev.of_node); >> + domain = NULL; >> + if (parent) { >> + domain = irq_find_host(parent); >> + of_node_put(parent); >> + } >> + > > I cannot really comment on the ARM side of things around how this system > is set up. I will leave that to someone who's more familiar with the > matter to review. > > Thanks, > Wei. -- Thank you, Roman