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 B5899C61DA4 for ; Thu, 9 Feb 2023 12:16:50 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229663AbjBIMQt (ORCPT ); Thu, 9 Feb 2023 07:16:49 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58070 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229449AbjBIMQr (ORCPT ); Thu, 9 Feb 2023 07:16:47 -0500 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 3B9F66A4F; Thu, 9 Feb 2023 04:16:29 -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 81C4B20C8AEA; Thu, 9 Feb 2023 04:15:43 -0800 (PST) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 81C4B20C8AEA DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1675944943; bh=NJCW5JSyQq5dAWVf5JpWprMe43t8PWxMWSTw86YjVx4=; h=From:To:Subject:Date:From; b=WwNLMKmd4LzkY4E1aUPH3nKpUlJ9ZpjvqSuIfGSAsvKJlaQHSJ37Y5FVPP4Ff9c6K 5GFXTF92lm1N4M0YbGffAYnDwBg1/4hXAM2CprgZM5QK6Oz00e5peI6cKoQgWACzJq t6hVYMF5yRfSyi3+Ur6yJtNJ5xHuGJ1Puttg6ONo= 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 0/5] Device tree support for Hyper-V VMBus driver Date: Thu, 9 Feb 2023 04:15:34 -0800 Message-Id: <1675944939-22631-1-git-send-email-ssengar@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This set of patches expands the VMBus driver to include device tree support. This feature allows for a kernel boot without the use of ACPI tables, resulting in a smaller memory footprint and potentially faster boot times. This is tested by enabling CONFIG_FLAT and OF_EARLY_FLATTREE for x86. The first two patches enable compilation of Hyper-V APIs in a non-ACPI build. The third patch converts the VMBus driver from acpi to more generic platform driver. Further to add device tree documentation for VMBus, it needs to club with other virtualization driver's documentation. For this rename the virtio folder to more generic hypervisor, so that all the hypervisor based devices can co-exist in a single place in device tree documentation. The fourth patch does this renaming. The fifth patch introduces the device tree documentation for VMBus. The sixth patch adds device tree support to the VMBus driver. Currently this is tested only for x86 and it may not work for other archs. [V5] - 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 - 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.yaml file - Fix commit messages and add Reviwed-by from Michael for first 3 patches [V4] - rebased which fixed return type of 'vmbus_mmio_remove' from int to void - used __maybe_unused for 'vmbus_of_match' and safeguard vmbus_acpi_device_ids under #ifdef [V3] - Changed the logic to use generic api (for_each_of_range) for parsing "ranges". - Remove dependency of ACPI for HYPERV in case of x86. - Removed "device tree bindings" from title and patch subject. - Removed duplicate vendor prefix, used microsoft instead of msft. - Use 'soc' in example of device tree documantation for parent node. - Fixed compatible schemas error generated in other modules referring to virtio. - Drop hex notation and leading zeros from device tree cell properties. Saurabh Sengar (5): drivers/clocksource/hyper-v: non ACPI support in hyperv clock Drivers: hv: allow non ACPI compilation for hv_is_hibernation_supported Drivers: hv: vmbus: Convert acpi_device to more generic platform_device dt-bindings: hypervisor: VMBus Driver: VMBus: Add device tree support .../bindings/bus/microsoft,vmbus.yaml | 50 ++++++++ MAINTAINERS | 1 + drivers/clocksource/hyperv_timer.c | 15 ++- drivers/hv/Kconfig | 6 +- drivers/hv/hv_common.c | 4 + drivers/hv/vmbus_drv.c | 118 ++++++++++++++---- 6 files changed, 165 insertions(+), 29 deletions(-) create mode 100644 Documentation/devicetree/bindings/bus/microsoft,vmbus.yaml -- 2.34.1