From nobody Sun Dec 14 02:00:18 2025 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 3FB91C05027 for ; Thu, 9 Feb 2023 12:16:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229557AbjBIMQ5 (ORCPT ); Thu, 9 Feb 2023 07:16:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58040 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229668AbjBIMQt (ORCPT ); Thu, 9 Feb 2023 07:16:49 -0500 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id B16EDE05B; Thu, 9 Feb 2023 04:16:30 -0800 (PST) Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id 9B2BC20C8AEB; Thu, 9 Feb 2023 04:15:43 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 9B2BC20C8AEB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1675944943; bh=9hqMgwt+9rfgzKvMywqn/H23HiHnKG9S9L6A/+1pzh0=; h=From:To:Subject:Date:In-Reply-To:References:From; b=rBqKiHDjeqm1sqXJAWL58/QjVyUXWPX1F68PIyJd3/YVlz4rOXdJ4A9SkkxbDoQd7 ZqTIXyrhNzyYAC5NJ3YkXo+9kefqiRuGRKw+D62Q/x0sR16jeikqMQeBjLZzxDQUVp aJQ1BA4rgHxi9+wde3lkNg5NRP2gsxQ3T7pK/nrY= From: Saurabh Sengar To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, daniel.lezcano@linaro.org, tglx@linutronix.de, virtualization@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, mikelley@microsoft.com, ssengar@linux.microsoft.com, dphadke@linux.microsoft.com Subject: [PATCH v5 1/5] drivers/clocksource/hyper-v: non ACPI support in hyperv clock Date: Thu, 9 Feb 2023 04:15:35 -0800 Message-Id: <1675944939-22631-2-git-send-email-ssengar@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> References: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add a placeholder function for the hv_setup_stimer0_irq API to accommodate systems without ACPI support. Since this function is not utilized on x86/x64 systems and non-ACPI support is only intended for x86/x64 systems, a placeholder function is sufficient for now and can be improved upon if necessary in the future. Signed-off-by: Saurabh Sengar Reviewed-by: Michael Kelley --- drivers/clocksource/hyperv_timer.c | 15 +++++++++++++-- 1 file changed, 13 insertions(+), 2 deletions(-) diff --git a/drivers/clocksource/hyperv_timer.c b/drivers/clocksource/hyper= v_timer.c index c0cef92b12b8..f32948c8a96f 100644 --- a/drivers/clocksource/hyperv_timer.c +++ b/drivers/clocksource/hyperv_timer.c @@ -49,7 +49,7 @@ static bool direct_mode_enabled; =20 static int stimer0_irq =3D -1; static int stimer0_message_sint; -static DEFINE_PER_CPU(long, stimer0_evt); +static __maybe_unused DEFINE_PER_CPU(long, stimer0_evt); =20 /* * Common code for stimer0 interrupts coming via Direct Mode or @@ -68,7 +68,7 @@ EXPORT_SYMBOL_GPL(hv_stimer0_isr); * stimer0 interrupt handler for architectures that support * per-cpu interrupts, which also implies Direct Mode. */ -static irqreturn_t hv_stimer0_percpu_isr(int irq, void *dev_id) +static irqreturn_t __maybe_unused hv_stimer0_percpu_isr(int irq, void *dev= _id) { hv_stimer0_isr(); return IRQ_HANDLED; @@ -196,6 +196,7 @@ void __weak hv_remove_stimer0_handler(void) { }; =20 +#ifdef CONFIG_ACPI /* Called only on architectures with per-cpu IRQs (i.e., not x86/x64) */ static int hv_setup_stimer0_irq(void) { @@ -230,6 +231,16 @@ static void hv_remove_stimer0_irq(void) stimer0_irq =3D -1; } } +#else +static int hv_setup_stimer0_irq(void) +{ + return 0; +} + +static void hv_remove_stimer0_irq(void) +{ +} +#endif =20 /* hv_stimer_alloc - Global initialization of the clockevent and stimer0 */ int hv_stimer_alloc(bool have_percpu_irqs) --=20 2.34.1 From nobody Sun Dec 14 02:00:18 2025 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 A2668C05027 for ; Thu, 9 Feb 2023 12:17:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229898AbjBIMRD (ORCPT ); Thu, 9 Feb 2023 07:17:03 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58476 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229699AbjBIMQt (ORCPT ); Thu, 9 Feb 2023 07:16:49 -0500 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id EBE19EB4A; Thu, 9 Feb 2023 04:16:30 -0800 (PST) Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id B424120C8AEE; Thu, 9 Feb 2023 04:15:43 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com B424120C8AEE DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1675944943; bh=i1p50TI+7fOgk4LW62buuCzlHOInl+oROOTdYyM1xe0=; h=From:To:Subject:Date:In-Reply-To:References:From; b=R45l2RjlJuLHuNwf4WONyHHr7T+kRK6l5zCqx/yYfKrb1R2/eigbHgmD6zqWhOFl3 sltSm2pidcN4VNi6j9iT4lMkklpiK8zqstWEO2chSL6SL81tbs+zK7SGDPP26hnxc/ UIl+MdjWxFPHmIu87aPIgyFILzzgSdHJk7YU2erI= From: Saurabh Sengar To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, daniel.lezcano@linaro.org, tglx@linutronix.de, virtualization@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, mikelley@microsoft.com, ssengar@linux.microsoft.com, dphadke@linux.microsoft.com Subject: [PATCH v5 2/5] Drivers: hv: allow non ACPI compilation for hv_is_hibernation_supported Date: Thu, 9 Feb 2023 04:15:36 -0800 Message-Id: <1675944939-22631-3-git-send-email-ssengar@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> References: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" acpi_sleep_state_supported() currently is defined only when CONFIG_ACPI=3Dy. For future work to enable device tree builds, put this function under #ifdef CONFIG_ACPI. Otherwise, return 'false' from hv_is_hibernation_supported() as Hyper-V guest configs using device tree don't support hibernation. Signed-off-by: Saurabh Sengar Reviewed-by: Michael Kelley --- drivers/hv/hv_common.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c index 52a6f89ccdbd..370ec20d1993 100644 --- a/drivers/hv/hv_common.c +++ b/drivers/hv/hv_common.c @@ -234,7 +234,11 @@ EXPORT_SYMBOL_GPL(hv_setup_dma_ops); =20 bool hv_is_hibernation_supported(void) { +#ifdef CONFIG_ACPI return !hv_root_partition && acpi_sleep_state_supported(ACPI_STATE_S4); +#else + return false; +#endif } EXPORT_SYMBOL_GPL(hv_is_hibernation_supported); =20 --=20 2.34.1 From nobody Sun Dec 14 02:00:18 2025 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 A5D2FC64EC7 for ; Thu, 9 Feb 2023 12:16:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229801AbjBIMQx (ORCPT ); Thu, 9 Feb 2023 07:16:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58142 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229655AbjBIMQt (ORCPT ); Thu, 9 Feb 2023 07:16:49 -0500 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 1DF365581; Thu, 9 Feb 2023 04:16:31 -0800 (PST) Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id CC66120C8AF0; Thu, 9 Feb 2023 04:15:43 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com CC66120C8AF0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1675944943; bh=QxjlMrs+k3GOIkNUqosnD/bWRotR9RtKp6Ub3/+UnTo=; h=From:To:Subject:Date:In-Reply-To:References:From; b=ObGN+su83uYpy2i07SF/nG9zaP4ZhVn+SdyQ6XViFKBANhShXzMjtUrCPwsdOUH8a ZTa9Rf6+VdsZun52aBXdAZJbZnWoWQxzE5eCiy6fbBimTUisfuhZ90E0ViAxfdz77w nAAb08FzD7FZAU+cf7wRX4NR6u06te2Tw/bjCsiY= From: Saurabh Sengar To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, daniel.lezcano@linaro.org, tglx@linutronix.de, virtualization@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, mikelley@microsoft.com, ssengar@linux.microsoft.com, dphadke@linux.microsoft.com Subject: [PATCH v5 3/5] Drivers: hv: vmbus: Convert acpi_device to more generic platform_device Date: Thu, 9 Feb 2023 04:15:37 -0800 Message-Id: <1675944939-22631-4-git-send-email-ssengar@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> References: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" VMBus driver code currently has direct dependency on ACPI and struct acpi_device. As a staging step toward optionally configuring based on device tree instead of ACPI, use a more generic platform device to reduce the dependency on ACPI where possible, though the dependency on ACPI is not completely removed. Also rename the function vmbus_acpi_remove() to the more generic vmbus_mmio_remove(). Signed-off-by: Saurabh Sengar Reviewed-by: Michael Kelley --- drivers/hv/vmbus_drv.c | 58 +++++++++++++++++++++++++----------------- 1 file changed, 35 insertions(+), 23 deletions(-) diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index d24dd65b33d4..73497157a23a 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -12,6 +12,7 @@ #include #include #include +#include #include #include #include @@ -44,7 +45,7 @@ struct vmbus_dynid { struct hv_vmbus_device_id id; }; =20 -static struct acpi_device *hv_acpi_dev; +static struct device *hv_dev; =20 static int hyperv_cpuhp_online; =20 @@ -143,7 +144,7 @@ static DEFINE_MUTEX(hyperv_mmio_lock); =20 static int vmbus_exists(void) { - if (hv_acpi_dev =3D=3D NULL) + if (hv_dev =3D=3D NULL) return -ENODEV; =20 return 0; @@ -932,7 +933,7 @@ static int vmbus_dma_configure(struct device *child_dev= ice) * On x86/x64 coherence is assumed and these calls have no effect. */ hv_setup_dma_ops(child_device, - device_get_dma_attr(&hv_acpi_dev->dev) =3D=3D DEV_DMA_COHERENT); + device_get_dma_attr(hv_dev) =3D=3D DEV_DMA_COHERENT); return 0; } =20 @@ -2090,7 +2091,7 @@ int vmbus_device_register(struct hv_device *child_dev= ice_obj) &child_device_obj->channel->offermsg.offer.if_instance); =20 child_device_obj->device.bus =3D &hv_bus; - child_device_obj->device.parent =3D &hv_acpi_dev->dev; + child_device_obj->device.parent =3D hv_dev; child_device_obj->device.release =3D vmbus_device_release; =20 child_device_obj->device.dma_parms =3D &child_device_obj->dma_parms; @@ -2262,7 +2263,7 @@ static acpi_status vmbus_walk_resources(struct acpi_r= esource *res, void *ctx) return AE_OK; } =20 -static void vmbus_acpi_remove(struct acpi_device *device) +static void vmbus_mmio_remove(void) { struct resource *cur_res; struct resource *next_res; @@ -2441,13 +2442,14 @@ void vmbus_free_mmio(resource_size_t start, resourc= e_size_t size) } EXPORT_SYMBOL_GPL(vmbus_free_mmio); =20 -static int vmbus_acpi_add(struct acpi_device *device) +static int vmbus_acpi_add(struct platform_device *pdev) { acpi_status result; int ret_val =3D -ENODEV; struct acpi_device *ancestor; + struct acpi_device *device =3D ACPI_COMPANION(&pdev->dev); =20 - hv_acpi_dev =3D device; + hv_dev =3D &device->dev; =20 /* * Older versions of Hyper-V for ARM64 fail to include the _CCA @@ -2489,10 +2491,21 @@ static int vmbus_acpi_add(struct acpi_device *devic= e) =20 acpi_walk_err: if (ret_val) - vmbus_acpi_remove(device); + vmbus_mmio_remove(); return ret_val; } =20 +static int vmbus_platform_driver_probe(struct platform_device *pdev) +{ + return vmbus_acpi_add(pdev); +} + +static int vmbus_platform_driver_remove(struct platform_device *pdev) +{ + vmbus_mmio_remove(); + return 0; +} + #ifdef CONFIG_PM_SLEEP static int vmbus_bus_suspend(struct device *dev) { @@ -2658,15 +2671,15 @@ static const struct dev_pm_ops vmbus_bus_pm =3D { .restore_noirq =3D vmbus_bus_resume }; =20 -static struct acpi_driver vmbus_acpi_driver =3D { - .name =3D "vmbus", - .ids =3D vmbus_acpi_device_ids, - .ops =3D { - .add =3D vmbus_acpi_add, - .remove =3D vmbus_acpi_remove, - }, - .drv.pm =3D &vmbus_bus_pm, - .drv.probe_type =3D PROBE_FORCE_SYNCHRONOUS, +static struct platform_driver vmbus_platform_driver =3D { + .probe =3D vmbus_platform_driver_probe, + .remove =3D vmbus_platform_driver_remove, + .driver =3D { + .name =3D "vmbus", + .acpi_match_table =3D ACPI_PTR(vmbus_acpi_device_ids), + .pm =3D &vmbus_bus_pm, + .probe_type =3D PROBE_FORCE_SYNCHRONOUS, + } }; =20 static void hv_kexec_handler(void) @@ -2750,12 +2763,11 @@ static int __init hv_acpi_init(void) /* * Get ACPI resources first. */ - ret =3D acpi_bus_register_driver(&vmbus_acpi_driver); - + ret =3D platform_driver_register(&vmbus_platform_driver); if (ret) return ret; =20 - if (!hv_acpi_dev) { + if (!hv_dev) { ret =3D -ENODEV; goto cleanup; } @@ -2785,8 +2797,8 @@ static int __init hv_acpi_init(void) return 0; =20 cleanup: - acpi_bus_unregister_driver(&vmbus_acpi_driver); - hv_acpi_dev =3D NULL; + platform_driver_unregister(&vmbus_platform_driver); + hv_dev =3D NULL; return ret; } =20 @@ -2839,7 +2851,7 @@ static void __exit vmbus_exit(void) =20 cpuhp_remove_state(hyperv_cpuhp_online); hv_synic_free(); - acpi_bus_unregister_driver(&vmbus_acpi_driver); + platform_driver_unregister(&vmbus_platform_driver); } =20 =20 --=20 2.34.1 From nobody Sun Dec 14 02:00:18 2025 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 534B2C05027 for ; Thu, 9 Feb 2023 12:17:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229629AbjBIMRA (ORCPT ); Thu, 9 Feb 2023 07:17:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58478 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229695AbjBIMQt (ORCPT ); Thu, 9 Feb 2023 07:16:49 -0500 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 8A90AEC4E; Thu, 9 Feb 2023 04:16:31 -0800 (PST) Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id E4FE920C8AF3; Thu, 9 Feb 2023 04:15:43 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com E4FE920C8AF3 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1675944943; bh=GI+VPyEx6h0BVnPPC0y/WHoLYEEOuv2EPkQqu7kzKDg=; h=From:To:Subject:Date:In-Reply-To:References:From; b=kdcwjwtuBNrI9HXY8HpmZ86VRzQT04nEkutIfXghfnZ1egmYQyBv6QzCgW87g8pIZ Bie+eLn0pLynu0InPJfJKYsivuRT9+p0Q1863BS11VH+rdKymsRg5JttbSgPtexoKu L7wTP/kJd5cyjimX5NHW9GT78f/B8Pz0RsohdP7k= From: Saurabh Sengar To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, daniel.lezcano@linaro.org, tglx@linutronix.de, virtualization@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, mikelley@microsoft.com, ssengar@linux.microsoft.com, dphadke@linux.microsoft.com Subject: [PATCH v5 4/5] dt-bindings: hypervisor: VMBus Date: Thu, 9 Feb 2023 04:15:38 -0800 Message-Id: <1675944939-22631-5-git-send-email-ssengar@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> References: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Add dt-bindings for Hyper-V VMBus. Signed-off-by: Saurabh Sengar --- [V5] - moved dt documantation to bus folder - update the dt node to have 'bus' as parent node instead of 'soc'. Also added compatible and ranges property for parent node. - Made sure dt_binding_check have no error/varnings for microsoft,vmbus.yam= l file .../bindings/bus/microsoft,vmbus.yaml | 50 +++++++++++++++++++ MAINTAINERS | 1 + 2 files changed, 51 insertions(+) create mode 100644 Documentation/devicetree/bindings/bus/microsoft,vmbus.y= aml diff --git a/Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml b/D= ocumentation/devicetree/bindings/bus/microsoft,vmbus.yaml new file mode 100644 index 000000000000..40daefc37615 --- /dev/null +++ b/Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml @@ -0,0 +1,50 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/bus/microsoft,vmbus.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Microsoft Hyper-V VMBus + +maintainers: + - Saurabh Sengar + +description: + VMBus is a software bus that implement the protocols for communication + between the root or host OS and guest OSs (virtual machines). + +properties: + compatible: + const: microsoft,vmbus + + ranges: true + + '#address-cells': + const: 2 + + '#size-cells': + const: 1 + +required: + - compatible + - ranges + - '#address-cells' + - '#size-cells' + +additionalProperties: false + +examples: + - | + bus@ff0000000 { + compatible =3D "simple-bus"; + #address-cells =3D <2>; + #size-cells =3D <1>; + ranges =3D <0x0 0xf 0xf0000000 0x10000000>; + + vmbus@ff0000000 { + compatible =3D "microsoft,vmbus"; + #address-cells =3D <2>; + #size-cells =3D <1>; + ranges =3D <0x0f 0xf0000000 0x0f 0xf0000000 0x10000000>; + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index df202a1e4b96..67ddecd1a383 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -9490,6 +9490,7 @@ S: Supported T: git git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux.git F: Documentation/ABI/stable/sysfs-bus-vmbus F: Documentation/ABI/testing/debugfs-hyperv +F: Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml F: Documentation/virt/hyperv F: Documentation/networking/device_drivers/ethernet/microsoft/netvsc.rst F: arch/arm64/hyperv --=20 2.34.1 From nobody Sun Dec 14 02:00:18 2025 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 6EAB5C05027 for ; Thu, 9 Feb 2023 12:17:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230029AbjBIMR1 (ORCPT ); Thu, 9 Feb 2023 07:17:27 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58480 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230127AbjBIMRN (ORCPT ); Thu, 9 Feb 2023 07:17:13 -0500 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 02B67DBE5; Thu, 9 Feb 2023 04:16:53 -0800 (PST) Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id 09A7020C8AF4; Thu, 9 Feb 2023 04:15:44 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 09A7020C8AF4 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1675944944; bh=tcypQPfMSnfnYp3JE6Trh1CtkCM96kzsYYRghzAy49I=; h=From:To:Subject:Date:In-Reply-To:References:From; b=bMVGNRK2D9pFEslGphWYzkl5YMZc6Ohj7OrdblC71KSHkCd3cjxa4eb3gt+Wj+Y0+ ohsGiJ/OT2VGXVCzJ6a3EEkeP0Z5cpLWfmOSOnO8uFq0NAMMbHvjHNwSsGE0+WNwFJ xS/LDWhVoVX1iHsfc9Tsc+tubf5H8zqef5++b7IY= From: Saurabh Sengar To: robh+dt@kernel.org, krzysztof.kozlowski+dt@linaro.org, kys@microsoft.com, haiyangz@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, daniel.lezcano@linaro.org, tglx@linutronix.de, virtualization@lists.linux-foundation.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, mikelley@microsoft.com, ssengar@linux.microsoft.com, dphadke@linux.microsoft.com Subject: [PATCH v5 5/5] Driver: VMBus: Add device tree support Date: Thu, 9 Feb 2023 04:15:39 -0800 Message-Id: <1675944939-22631-6-git-send-email-ssengar@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> References: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Update the driver to support device tree boot as well along with ACPI. At present the device tree parsing only provides the mmio region info and is not the exact copy of ACPI parsing. This is sufficient to cater all the current device tree usecases for VMBus. Currently device tree is supported only for x86 systems. Signed-off-by: Saurabh Sengar --- - Removed #else for device tree parsing code. This should help better test coverage. - Fix macro '__maybe_unused' warning - Added below options in Kconfig to enable device tree options for HYPERV select OF if !ACPI select OF_EARLY_FLATTREE if !ACPI drivers/hv/Kconfig | 6 +++-- drivers/hv/vmbus_drv.c | 60 ++++++++++++++++++++++++++++++++++++++++-- 2 files changed, 62 insertions(+), 4 deletions(-) diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig index 0747a8f1fcee..1a55bf32d195 100644 --- a/drivers/hv/Kconfig +++ b/drivers/hv/Kconfig @@ -4,11 +4,13 @@ menu "Microsoft Hyper-V guest support" =20 config HYPERV tristate "Microsoft Hyper-V client drivers" - depends on ACPI && ((X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \ - || (ARM64 && !CPU_BIG_ENDIAN)) + depends on (X86 && X86_LOCAL_APIC && HYPERVISOR_GUEST) \ + || (ACPI && ARM64 && !CPU_BIG_ENDIAN) select PARAVIRT select X86_HV_CALLBACK_VECTOR if X86 select VMAP_PFN + select OF if !ACPI + select OF_EARLY_FLATTREE if !ACPI help Select this option to run Linux as a Hyper-V client operating system. diff --git a/drivers/hv/vmbus_drv.c b/drivers/hv/vmbus_drv.c index 73497157a23a..02f6bab61c37 100644 --- a/drivers/hv/vmbus_drv.c +++ b/drivers/hv/vmbus_drv.c @@ -20,6 +20,7 @@ #include #include #include +#include #include #include #include @@ -2152,7 +2153,7 @@ void vmbus_device_unregister(struct hv_device *device= _obj) device_unregister(&device_obj->device); } =20 - +#ifdef CONFIG_ACPI /* * VMBUS is an acpi enumerated device. Get the information we * need from DSDT. @@ -2262,6 +2263,7 @@ static acpi_status vmbus_walk_resources(struct acpi_r= esource *res, void *ctx) =20 return AE_OK; } +#endif =20 static void vmbus_mmio_remove(void) { @@ -2282,7 +2284,7 @@ static void vmbus_mmio_remove(void) } } =20 -static void vmbus_reserve_fb(void) +static void __maybe_unused vmbus_reserve_fb(void) { resource_size_t start =3D 0, size; struct pci_dev *pdev; @@ -2442,6 +2444,7 @@ void vmbus_free_mmio(resource_size_t start, resource_= size_t size) } EXPORT_SYMBOL_GPL(vmbus_free_mmio); =20 +#ifdef CONFIG_ACPI static int vmbus_acpi_add(struct platform_device *pdev) { acpi_status result; @@ -2494,10 +2497,50 @@ static int vmbus_acpi_add(struct platform_device *p= dev) vmbus_mmio_remove(); return ret_val; } +#endif + +static int vmbus_device_add(struct platform_device *pdev) +{ + struct resource **cur_res =3D &hyperv_mmio; + struct of_range range; + struct of_range_parser parser; + struct device_node *np; + int ret =3D 0; + + hv_dev =3D &pdev->dev; + np =3D pdev->dev.of_node; + + ret =3D of_range_parser_init(&parser, np); + if (ret) { + dev_err(hv_dev, "Failed to parse resources.\n"); + return ret; + } + + for_each_of_range(&parser, &range) { + struct resource *res; + + res =3D kzalloc(sizeof(*res), GFP_ATOMIC); + if (!res) + return -ENOMEM; + + res->name =3D "hyperv mmio"; + res->flags =3D IORESOURCE_MEM | IORESOURCE_MEM_64; + res->start =3D range.pci_addr; + res->end =3D range.pci_addr + range.size; + + *cur_res =3D res; + cur_res =3D &res->sibling; + } + + return ret; +} =20 static int vmbus_platform_driver_probe(struct platform_device *pdev) { +#ifdef CONFIG_ACPI return vmbus_acpi_add(pdev); +#endif + return vmbus_device_add(pdev); } =20 static int vmbus_platform_driver_remove(struct platform_device *pdev) @@ -2643,12 +2686,24 @@ static int vmbus_bus_resume(struct device *dev) #define vmbus_bus_resume NULL #endif /* CONFIG_PM_SLEEP */ =20 +static const __maybe_unused struct of_device_id vmbus_of_match[] =3D { + { + .compatible =3D "microsoft,vmbus", + }, + { + /* sentinel */ + }, +}; +MODULE_DEVICE_TABLE(of, vmbus_of_match); + +#ifdef CONFIG_ACPI static const struct acpi_device_id vmbus_acpi_device_ids[] =3D { {"VMBUS", 0}, {"VMBus", 0}, {"", 0}, }; MODULE_DEVICE_TABLE(acpi, vmbus_acpi_device_ids); +#endif =20 /* * Note: we must use the "no_irq" ops, otherwise hibernation can not work = with @@ -2677,6 +2732,7 @@ static struct platform_driver vmbus_platform_driver = =3D { .driver =3D { .name =3D "vmbus", .acpi_match_table =3D ACPI_PTR(vmbus_acpi_device_ids), + .of_match_table =3D of_match_ptr(vmbus_of_match), .pm =3D &vmbus_bus_pm, .probe_type =3D PROBE_FORCE_SYNCHRONOUS, } --=20 2.34.1