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=-12.9 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,UNWANTED_LANGUAGE_BODY, URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 543DAC433EF for ; Fri, 17 Sep 2021 13:01:47 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 3AA66610A6 for ; Fri, 17 Sep 2021 13:01:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235584AbhIQNDH (ORCPT ); Fri, 17 Sep 2021 09:03:07 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44428 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234640AbhIQNDG (ORCPT ); Fri, 17 Sep 2021 09:03:06 -0400 Received: from mail-lf1-x12d.google.com (mail-lf1-x12d.google.com [IPv6:2a00:1450:4864:20::12d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B48ACC061574 for ; Fri, 17 Sep 2021 06:01:43 -0700 (PDT) Received: by mail-lf1-x12d.google.com with SMTP id p29so32317575lfa.11 for ; Fri, 17 Sep 2021 06:01:43 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=nOUOG75GOz571OX8ITuOEpvSRHg2zXkMyJh97BY3RUY=; b=DVleVrCvRAdqZp/yPatEk2JqDQdaCKPV9hMsJSSPCFvPJISePzzWa1fFVmSDK1kOSN HFnXNvK5yZkZKMBnLx7wvAnaenTIDGX+D5BBcT6f3Tkvt94WxReAAvpyt+33Xk1wbWcZ +9UMsH9pH9VW2JbRgJ0yOUq76NKVQbWOrDwizNp3L7vBUKg946XYIhg6q3vkKUuRWOV9 a4Wcm6Wcw2a331LlEt2w22YGNIVJEhzato59jlml/xrk0txWGTigockGiwIpb0FL9STt t2rk0+HI11YBMYieGy2HZKw8yoadOCM9rSbc/N8GIeh5mjT+SgN2KTinZiTPniMBHthj cw1A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=nOUOG75GOz571OX8ITuOEpvSRHg2zXkMyJh97BY3RUY=; b=X1fmOX91knddmU+npEC06ajCl8UdKnulJHiO6ZLljiIqgZVxe/JZi1XgqoJVJtO9Ro tnI+FqyfLdEHIjSkIY0pEVImPrvhYGd2zv43iu/AUnsTX2QJjGpo4BAXo3P/XOrE0kZz OpC4L1mOwK58vsMU3tMtA589czejacljvYDAkkNJv+pwXA44hZBFrcQHR9XW589OkP1E 4+1+Dq9Wt3bxFa8lwkmwC39sre7W8HvEbDxEcVDv+omeX9KxzOBSB64KbAhmr3BGwlmv mdJfTLpn2TzmRcKzK3GOExy907bdu7snXG6+8z1IhQCzdhJf/zMxFIjLMKzWM3qklUHd gCig== X-Gm-Message-State: AOAM533f1f1Dt5Sz/U4T5eBTbhAMrJQEx/glumunl0rZS+J19Mc/zOZF SeYzHkrGGJyxGTg+7W4DXQw= X-Google-Smtp-Source: ABdhPJxvPqjCvYrNlgvVOuQYRuzxkAEBoERlUud1NqfPmVJFcqleK6VZh409vbqQY0ZNiqLipkcD8Q== X-Received: by 2002:a2e:a37a:: with SMTP id i26mr9180044ljn.466.1631883686553; Fri, 17 Sep 2021 06:01:26 -0700 (PDT) Received: from localhost.localdomain ([185.199.97.5]) by smtp.gmail.com with ESMTPSA id y14sm695484ljm.39.2021.09.17.06.01.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Sep 2021 06:01:25 -0700 (PDT) From: Oleksandr Andrushchenko To: xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org Cc: boris.ostrovsky@oracle.com, jgross@suse.com, julien@xen.org, sstabellini@kernel.org, jbeulich@suse.com, Oleksandr Andrushchenko , Anastasiia Lukianenko Subject: [PATCH] xen-pciback: allow compiling on other archs than x86 Date: Fri, 17 Sep 2021 16:01:23 +0300 Message-Id: <20210917130123.1764493-1-andr2000@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Oleksandr Andrushchenko Xen-pciback driver was designed to be built for x86 only. But it can also be used by other architectures, e.g. Arm. Re-structure the driver in a way that it can be built for other platforms as well. Signed-off-by: Oleksandr Andrushchenko Signed-off-by: Anastasiia Lukianenko --- Tested on Arm and x86. --- arch/x86/include/asm/xen/pci.h | 24 ---------- arch/x86/pci/xen.c | 74 +---------------------------- drivers/xen/Kconfig | 2 +- drivers/xen/events/events_base.c | 1 + drivers/xen/pci.c | 75 ++++++++++++++++++++++++++++++ drivers/xen/xen-pciback/pci_stub.c | 3 +- drivers/xen/xen-pciback/xenbus.c | 2 +- include/xen/pci.h | 34 ++++++++++++++ 8 files changed, 115 insertions(+), 100 deletions(-) create mode 100644 include/xen/pci.h diff --git a/arch/x86/include/asm/xen/pci.h b/arch/x86/include/asm/xen/pci.h index 3506d8c598c1..9ff7b49bca08 100644 --- a/arch/x86/include/asm/xen/pci.h +++ b/arch/x86/include/asm/xen/pci.h @@ -14,30 +14,6 @@ static inline int pci_xen_hvm_init(void) return -1; } #endif -#if defined(CONFIG_XEN_DOM0) -int __init pci_xen_initial_domain(void); -int xen_find_device_domain_owner(struct pci_dev *dev); -int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain); -int xen_unregister_device_domain_owner(struct pci_dev *dev); -#else -static inline int __init pci_xen_initial_domain(void) -{ - return -1; -} -static inline int xen_find_device_domain_owner(struct pci_dev *dev) -{ - return -1; -} -static inline int xen_register_device_domain_owner(struct pci_dev *dev, - uint16_t domain) -{ - return -1; -} -static inline int xen_unregister_device_domain_owner(struct pci_dev *dev) -{ - return -1; -} -#endif #if defined(CONFIG_PCI_MSI) #if defined(CONFIG_PCI_XEN) diff --git a/arch/x86/pci/xen.c b/arch/x86/pci/xen.c index 3d41a09c2c14..4a45b0bf9ae4 100644 --- a/arch/x86/pci/xen.c +++ b/arch/x86/pci/xen.c @@ -23,6 +23,7 @@ #include #include +#include #include #include #include @@ -583,77 +584,4 @@ int __init pci_xen_initial_domain(void) } return 0; } - -struct xen_device_domain_owner { - domid_t domain; - struct pci_dev *dev; - struct list_head list; -}; - -static DEFINE_SPINLOCK(dev_domain_list_spinlock); -static struct list_head dev_domain_list = LIST_HEAD_INIT(dev_domain_list); - -static struct xen_device_domain_owner *find_device(struct pci_dev *dev) -{ - struct xen_device_domain_owner *owner; - - list_for_each_entry(owner, &dev_domain_list, list) { - if (owner->dev == dev) - return owner; - } - return NULL; -} - -int xen_find_device_domain_owner(struct pci_dev *dev) -{ - struct xen_device_domain_owner *owner; - int domain = -ENODEV; - - spin_lock(&dev_domain_list_spinlock); - owner = find_device(dev); - if (owner) - domain = owner->domain; - spin_unlock(&dev_domain_list_spinlock); - return domain; -} -EXPORT_SYMBOL_GPL(xen_find_device_domain_owner); - -int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain) -{ - struct xen_device_domain_owner *owner; - - owner = kzalloc(sizeof(struct xen_device_domain_owner), GFP_KERNEL); - if (!owner) - return -ENODEV; - - spin_lock(&dev_domain_list_spinlock); - if (find_device(dev)) { - spin_unlock(&dev_domain_list_spinlock); - kfree(owner); - return -EEXIST; - } - owner->domain = domain; - owner->dev = dev; - list_add_tail(&owner->list, &dev_domain_list); - spin_unlock(&dev_domain_list_spinlock); - return 0; -} -EXPORT_SYMBOL_GPL(xen_register_device_domain_owner); - -int xen_unregister_device_domain_owner(struct pci_dev *dev) -{ - struct xen_device_domain_owner *owner; - - spin_lock(&dev_domain_list_spinlock); - owner = find_device(dev); - if (!owner) { - spin_unlock(&dev_domain_list_spinlock); - return -ENODEV; - } - list_del(&owner->list); - spin_unlock(&dev_domain_list_spinlock); - kfree(owner); - return 0; -} -EXPORT_SYMBOL_GPL(xen_unregister_device_domain_owner); #endif diff --git a/drivers/xen/Kconfig b/drivers/xen/Kconfig index a37eb52fb401..057ddf61ef61 100644 --- a/drivers/xen/Kconfig +++ b/drivers/xen/Kconfig @@ -182,7 +182,7 @@ config SWIOTLB_XEN config XEN_PCIDEV_BACKEND tristate "Xen PCI-device backend driver" - depends on PCI && X86 && XEN + depends on PCI && XEN depends on XEN_BACKEND default m help diff --git a/drivers/xen/events/events_base.c b/drivers/xen/events/events_base.c index a78704ae3618..35493ff0d146 100644 --- a/drivers/xen/events/events_base.c +++ b/drivers/xen/events/events_base.c @@ -65,6 +65,7 @@ #include #include #include +#include #include "events_internal.h" diff --git a/drivers/xen/pci.c b/drivers/xen/pci.c index 224df03ce42e..fc8c1249d49f 100644 --- a/drivers/xen/pci.c +++ b/drivers/xen/pci.c @@ -254,3 +254,78 @@ static int xen_mcfg_late(void) return 0; } #endif + +#ifdef CONFIG_XEN_DOM0 +struct xen_device_domain_owner { + domid_t domain; + struct pci_dev *dev; + struct list_head list; +}; + +static DEFINE_SPINLOCK(dev_domain_list_spinlock); +static struct list_head dev_domain_list = LIST_HEAD_INIT(dev_domain_list); + +static struct xen_device_domain_owner *find_device(struct pci_dev *dev) +{ + struct xen_device_domain_owner *owner; + + list_for_each_entry(owner, &dev_domain_list, list) { + if (owner->dev == dev) + return owner; + } + return NULL; +} + +int xen_find_device_domain_owner(struct pci_dev *dev) +{ + struct xen_device_domain_owner *owner; + int domain = -ENODEV; + + spin_lock(&dev_domain_list_spinlock); + owner = find_device(dev); + if (owner) + domain = owner->domain; + spin_unlock(&dev_domain_list_spinlock); + return domain; +} +EXPORT_SYMBOL_GPL(xen_find_device_domain_owner); + +int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain) +{ + struct xen_device_domain_owner *owner; + + owner = kzalloc(sizeof(struct xen_device_domain_owner), GFP_KERNEL); + if (!owner) + return -ENODEV; + + spin_lock(&dev_domain_list_spinlock); + if (find_device(dev)) { + spin_unlock(&dev_domain_list_spinlock); + kfree(owner); + return -EEXIST; + } + owner->domain = domain; + owner->dev = dev; + list_add_tail(&owner->list, &dev_domain_list); + spin_unlock(&dev_domain_list_spinlock); + return 0; +} +EXPORT_SYMBOL_GPL(xen_register_device_domain_owner); + +int xen_unregister_device_domain_owner(struct pci_dev *dev) +{ + struct xen_device_domain_owner *owner; + + spin_lock(&dev_domain_list_spinlock); + owner = find_device(dev); + if (!owner) { + spin_unlock(&dev_domain_list_spinlock); + return -ENODEV; + } + list_del(&owner->list); + spin_unlock(&dev_domain_list_spinlock); + kfree(owner); + return 0; +} +EXPORT_SYMBOL_GPL(xen_unregister_device_domain_owner); +#endif diff --git a/drivers/xen/xen-pciback/pci_stub.c b/drivers/xen/xen-pciback/pci_stub.c index f8e4faa96ad6..bba527620507 100644 --- a/drivers/xen/xen-pciback/pci_stub.c +++ b/drivers/xen/xen-pciback/pci_stub.c @@ -19,7 +19,8 @@ #include #include #include -#include +#include +#include #include #include #include "pciback.h" diff --git a/drivers/xen/xen-pciback/xenbus.c b/drivers/xen/xen-pciback/xenbus.c index c09c7ebd6968..da34ce85dc88 100644 --- a/drivers/xen/xen-pciback/xenbus.c +++ b/drivers/xen/xen-pciback/xenbus.c @@ -14,7 +14,7 @@ #include #include #include -#include +#include #include "pciback.h" #define INVALID_EVTCHN_IRQ (-1) diff --git a/include/xen/pci.h b/include/xen/pci.h new file mode 100644 index 000000000000..5c988d5ff38f --- /dev/null +++ b/include/xen/pci.h @@ -0,0 +1,34 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef __XEN_PCI_H__ +#define __XEN_PCI_H__ + +#if defined(CONFIG_XEN_DOM0) +int __init pci_xen_initial_domain(void); +int xen_find_device_domain_owner(struct pci_dev *dev); +int xen_register_device_domain_owner(struct pci_dev *dev, uint16_t domain); +int xen_unregister_device_domain_owner(struct pci_dev *dev); +#else +static inline int __init pci_xen_initial_domain(void) +{ + return -1; +} + +static inline int xen_find_device_domain_owner(struct pci_dev *dev) +{ + return -1; +} + +static inline int xen_register_device_domain_owner(struct pci_dev *dev, + uint16_t domain) +{ + return -1; +} + +static inline int xen_unregister_device_domain_owner(struct pci_dev *dev) +{ + return -1; +} +#endif + +#endif -- 2.25.1