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[23.128.96.35]) by mx.google.com with ESMTPS id 199-20020a6301d0000000b00565323c8295si4538716pgb.749.2023.09.22.15.16.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 22 Sep 2023 15:16:36 -0700 (PDT) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.35 as permitted sender) client-ip=23.128.96.35; Authentication-Results: mx.google.com; dkim=pass header.i=@linux.microsoft.com header.s=default header.b=hCeq+BcH; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.35 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linux.microsoft.com Received: from out1.vger.email (depot.vger.email [IPv6:2620:137:e000::3:0]) by groat.vger.email (Postfix) with ESMTP id 2EB1D83BBDDD; Fri, 22 Sep 2023 11:38:57 -0700 (PDT) X-Virus-Status: Clean X-Virus-Scanned: clamav-milter 0.103.10 at groat.vger.email Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233393AbjIVSit (ORCPT + 28 others); Fri, 22 Sep 2023 14:38:49 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53346 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229802AbjIVSis (ORCPT ); Fri, 22 Sep 2023 14:38:48 -0400 Received: from linux.microsoft.com (linux.microsoft.com [13.77.154.182]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id 99384AF; Fri, 22 Sep 2023 11:38:41 -0700 (PDT) Received: from linuxonhyperv3.guj3yctzbm1etfxqx2vob5hsef.xx.internal.cloudapp.net (linux.microsoft.com [13.77.154.182]) by linux.microsoft.com (Postfix) with ESMTPSA id 0F671212C5D0; Fri, 22 Sep 2023 11:38:41 -0700 (PDT) DKIM-Filter: OpenDKIM Filter v2.11.0 linux.microsoft.com 0F671212C5D0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.microsoft.com; s=default; t=1695407921; bh=NIfGVUlO7WQ33ga3OGW5GP0MsO2X2+qMCAxYLtCBKi8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=hCeq+BcHF6IgXlUxk71xccHS8s89u9ojevfczhxOorqjOTzwcR2Mr3kkXmSI0HoOJ Npbpm9gyhhDOgfOIXcmSkCd7JtYLPFqoLfthfOLvAUYzNYJY1l8jORxfrlkUiNFDNK gSlF8MvKfETlfwz42VzB0pkoaTXxqTykw18wfHFw= From: Nuno Das Neves To: linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-arch@vger.kernel.org Cc: patches@lists.linux.dev, mikelley@microsoft.com, kys@microsoft.com, wei.liu@kernel.org, gregkh@linuxfoundation.org, haiyangz@microsoft.com, decui@microsoft.com, apais@linux.microsoft.com, Tianyu.Lan@microsoft.com, ssengar@linux.microsoft.com, mukeshrathor@microsoft.com, stanislav.kinsburskiy@gmail.com, jinankjain@linux.microsoft.com, vkuznets@redhat.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, will@kernel.org, catalin.marinas@arm.com Subject: [PATCH v3 02/15] mshyperv: Introduce hv_get_hypervisor_version function Date: Fri, 22 Sep 2023 11:38:22 -0700 Message-Id: <1695407915-12216-3-git-send-email-nunodasneves@linux.microsoft.com> X-Mailer: git-send-email 1.8.3.1 In-Reply-To: <1695407915-12216-1-git-send-email-nunodasneves@linux.microsoft.com> References: <1695407915-12216-1-git-send-email-nunodasneves@linux.microsoft.com> X-Spam-Status: No, score=-8.4 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on groat.vger.email Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-Greylist: Sender passed SPF test, not delayed by milter-greylist-4.6.4 (groat.vger.email [0.0.0.0]); Fri, 22 Sep 2023 11:38:57 -0700 (PDT) X-getmail-retrieved-from-mailbox: INBOX X-GMAIL-THRID: 1777765621096706698 X-GMAIL-MSGID: 1777777766692029573 x86_64 and arm64 implementations to get the hypervisor version information. Store these in hv_hypervisor_version_info structure to simplify parsing the fields. Replace the existing parsing when printing the version numbers at boot. Signed-off-by: Nuno Das Neves --- arch/arm64/hyperv/mshyperv.c | 23 +++++++++++++------- arch/x86/kernel/cpu/mshyperv.c | 36 +++++++++++++++++++------------ include/asm-generic/hyperv-tlfs.h | 23 ++++++++++++++++++++ include/asm-generic/mshyperv.h | 2 ++ 4 files changed, 62 insertions(+), 22 deletions(-) diff --git a/arch/arm64/hyperv/mshyperv.c b/arch/arm64/hyperv/mshyperv.c index f1b8a04ee9f2..53bdd3bc81ac 100644 --- a/arch/arm64/hyperv/mshyperv.c +++ b/arch/arm64/hyperv/mshyperv.c @@ -19,10 +19,19 @@ static bool hyperv_initialized; +int hv_get_hypervisor_version(union hv_hypervisor_version_info *info) +{ + hv_get_vpreg_128(HV_REGISTER_HYPERVISOR_VERSION, + (struct hv_get_vp_registers_output *)info); + + return 0; +} +EXPORT_SYMBOL_GPL(hv_get_hypervisor_version); + static int __init hyperv_init(void) { - struct hv_get_vp_registers_output result; - u32 a, b, c, d; + struct hv_get_vp_registers_output result; + union hv_hypervisor_version_info version; u64 guest_id; int ret; @@ -55,13 +64,11 @@ static int __init hyperv_init(void) ms_hyperv.misc_features); /* Get information about the Hyper-V host version */ - hv_get_vpreg_128(HV_REGISTER_HYPERVISOR_VERSION, &result); - a = result.as32.a; - b = result.as32.b; - c = result.as32.c; - d = result.as32.d; + hv_get_hypervisor_version(&version); pr_info("Hyper-V: Host Build %d.%d.%d.%d-%d-%d\n", - b >> 16, b & 0xFFFF, a, d & 0xFFFFFF, c, d >> 24); + version.major_version, version.minor_version, + version.build_number, version.service_number, + version.service_pack, version.service_branch); ret = hv_common_init(); if (ret) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 7c82b96da11f..73fbcc003d68 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -347,13 +347,26 @@ static void __init reduced_hw_init(void) x86_init.irqs.pre_vector_init = x86_init_noop; } +int hv_get_hypervisor_version(union hv_hypervisor_version_info *info) +{ + unsigned int hv_max_functions; + + hv_max_functions = cpuid_eax(HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS); + if (hv_max_functions < HYPERV_CPUID_VERSION) { + pr_err("%s: Could not detect Hyper-V version\n", __func__); + return -ENODEV; + } + + cpuid(HYPERV_CPUID_VERSION, &info->eax, &info->ebx, &info->ecx, &info->edx); + + return 0; +} +EXPORT_SYMBOL_GPL(hv_get_hypervisor_version); + static void __init ms_hyperv_init_platform(void) { int hv_max_functions_eax; - int hv_host_info_eax; - int hv_host_info_ebx; - int hv_host_info_ecx; - int hv_host_info_edx; + union hv_hypervisor_version_info version; #ifdef CONFIG_PARAVIRT pv_info.name = "Hyper-V"; @@ -407,16 +420,11 @@ static void __init ms_hyperv_init_platform(void) /* * Extract host information. */ - if (hv_max_functions_eax >= HYPERV_CPUID_VERSION) { - hv_host_info_eax = cpuid_eax(HYPERV_CPUID_VERSION); - hv_host_info_ebx = cpuid_ebx(HYPERV_CPUID_VERSION); - hv_host_info_ecx = cpuid_ecx(HYPERV_CPUID_VERSION); - hv_host_info_edx = cpuid_edx(HYPERV_CPUID_VERSION); - - pr_info("Hyper-V: Host Build %d.%d.%d.%d-%d-%d\n", - hv_host_info_ebx >> 16, hv_host_info_ebx & 0xFFFF, - hv_host_info_eax, hv_host_info_edx & 0xFFFFFF, - hv_host_info_ecx, hv_host_info_edx >> 24); + if (hv_get_hypervisor_version(&version) == 0) { + pr_info("Hyper-V Host Build:%d-%d.%d-%d-%d.%d\n", + version.build_number, version.major_version, + version.minor_version, version.service_pack, + version.service_branch, version.service_number); } if (ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS && diff --git a/include/asm-generic/hyperv-tlfs.h b/include/asm-generic/hyperv-tlfs.h index fdac4a1714ec..f63b3704d89e 100644 --- a/include/asm-generic/hyperv-tlfs.h +++ b/include/asm-generic/hyperv-tlfs.h @@ -787,6 +787,29 @@ struct hv_input_unmap_device_interrupt { #define HV_SOURCE_SHADOW_NONE 0x0 #define HV_SOURCE_SHADOW_BRIDGE_BUS_RANGE 0x1 +/* + * Version info reported by hypervisor + */ +union hv_hypervisor_version_info { + struct { + u32 build_number; + + u32 minor_version : 16; + u32 major_version : 16; + + u32 service_pack; + + u32 service_number : 24; + u32 service_branch : 8; + }; + struct { + u32 eax; + u32 ebx; + u32 ecx; + u32 edx; + }; +}; + /* * The whole argument should fit in a page to be able to pass to the hypervisor * in one hypercall. diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index 38fc48405d5f..5b3512e5a72e 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -161,6 +161,8 @@ static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type) } } +int hv_get_hypervisor_version(union hv_hypervisor_version_info *info); + void hv_setup_vmbus_handler(void (*handler)(void)); void hv_remove_vmbus_handler(void); void hv_setup_stimer0_handler(void (*handler)(void));