From patchwork Fri Aug 27 17:21:00 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 503663 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=-15.8 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,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 2A291C25AEB for ; Fri, 27 Aug 2021 17:21:41 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 13CEB60E0B for ; Fri, 27 Aug 2021 17:21:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240864AbhH0RW2 (ORCPT ); Fri, 27 Aug 2021 13:22:28 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60700 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238836AbhH0RWQ (ORCPT ); Fri, 27 Aug 2021 13:22:16 -0400 Received: from mail-pl1-x636.google.com (mail-pl1-x636.google.com [IPv6:2607:f8b0:4864:20::636]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 09420C061796; Fri, 27 Aug 2021 10:21:27 -0700 (PDT) Received: by mail-pl1-x636.google.com with SMTP id m4so4386000pll.0; Fri, 27 Aug 2021 10:21:27 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=QeAoBJVxLuEqjhstpPPHRrsV4aYneiblS47oqHVJx+4=; b=I7NUV++ybJ+PeLzq7nvmvC/fUa1MzSPBVMWympCWggjJfdGIagT64paurWTr4ufYmh iyifKSagK7g0dfWSGenf+VOn1hz4bUmTah6emDjZ7Foz5yleN2+WsDzCIuDF9ckq2p8q hFjrwh845yHhH4sTpGEnOYuYp+n6e3PBkeMtpDD2gYyYmLb/pNE98ycigf1ahWeak5Ds 119NB5Pug3TLpnQ/Feznsq48O//rxAT/a4sTQ52sT7LMmBNKIHmPmUv4Wo2l0yZEYlky QLNWAslMK29qAA7pi1dHujT6sJotapiAiz0QzHw0Xdhri/P7a9oV3kQamXq3XVGl03mc qYfw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=QeAoBJVxLuEqjhstpPPHRrsV4aYneiblS47oqHVJx+4=; b=PXsPbSnwIih+0U8WeZlScXaC/Dn5qw0Al6N3PcUHZp1PqGmKO6IHm6/1HDNGVAPOrZ lebtgePjs6YIJl1jVtkWY48E3sd9JvD2vYjOduqKtP1yrN3VsEax5OcXLl7Y7Je/kYng fPggb7WtiRUyhBLLRlJ5Xem/5Px/EbP47xL6cAjFvQ4U6ogNEd/fupS1PpvltHLAP2dU FESU+TmOqiyHnMW+Vp/RNhvkjTknlxavOV70bL4IpZL5jLy3d2HfhyNUfbYwZCF2flqY 6q6Duza+94RYYCUZT7lvtF5lEb9XBdsG5WNLTc+hoRI3Bco/dVsOZJCkgk3CC5MVfhn1 BCBQ== X-Gm-Message-State: AOAM5315IeON+AU9VEyhObjKdOQtO+03tQj6439b/hx9vO14lc3x45qN 960EuMq3X2ehcYVHnh0Bt7M= X-Google-Smtp-Source: ABdhPJygO/uJNLRxEGKep6uevI66uTYM1Cjltj7n7K2J5FM1lDlOoUIpLG2da+nKpVHYkSugQbym8Q== X-Received: by 2002:a17:902:70cb:b0:132:6a68:af90 with SMTP id l11-20020a17090270cb00b001326a68af90mr9716504plt.56.1630084886558; Fri, 27 Aug 2021 10:21:26 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:36:ef50:8fcd:44d1:eb17]) by smtp.gmail.com with ESMTPSA id f5sm7155015pjo.23.2021.08.27.10.21.25 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 27 Aug 2021 10:21:26 -0700 (PDT) From: Tianyu Lan To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, catalin.marinas@arm.com, will@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, konrad.wilk@oracle.com, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, joro@8bytes.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, gregkh@linuxfoundation.org, arnd@arndb.de, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, brijesh.singh@amd.com, thomas.lendacky@amd.com, Tianyu.Lan@microsoft.com, pgonda@google.com, martin.b.radev@gmail.com, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, rppt@kernel.org, hannes@cmpxchg.org, aneesh.kumar@linux.ibm.com, krish.sadhukhan@oracle.com, saravanand@fb.com, linux-arm-kernel@lists.infradead.org, xen-devel@lists.xenproject.org, rientjes@google.com, ardb@kernel.org, michael.h.kelley@microsoft.com Cc: iommu@lists.linux-foundation.org, linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, parri.andrea@gmail.com, dave.hansen@intel.com Subject: [PATCH V4 02/13] x86/hyperv: Initialize shared memory boundary in the Isolation VM. Date: Fri, 27 Aug 2021 13:21:00 -0400 Message-Id: <20210827172114.414281-3-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210827172114.414281-1-ltykernel@gmail.com> References: <20210827172114.414281-1-ltykernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Tianyu Lan Hyper-V exposes shared memory boundary via cpuid HYPERV_CPUID_ISOLATION_CONFIG and store it in the shared_gpa_boundary of ms_hyperv struct. This prepares to share memory with host for SNP guest. Signed-off-by: Tianyu Lan --- Change since v3: * user BIT_ULL to get shared_gpa_boundary * Rename field Reserved* to reserved --- arch/x86/kernel/cpu/mshyperv.c | 2 ++ include/asm-generic/mshyperv.h | 12 +++++++++++- 2 files changed, 13 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index 20557a9d6e25..8bb001198316 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -313,6 +313,8 @@ static void __init ms_hyperv_init_platform(void) if (ms_hyperv.priv_high & HV_ISOLATION) { ms_hyperv.isolation_config_a = cpuid_eax(HYPERV_CPUID_ISOLATION_CONFIG); ms_hyperv.isolation_config_b = cpuid_ebx(HYPERV_CPUID_ISOLATION_CONFIG); + ms_hyperv.shared_gpa_boundary = + BIT_ULL(ms_hyperv.shared_gpa_boundary_bits); pr_info("Hyper-V: Isolation Config: Group A 0x%x, Group B 0x%x\n", ms_hyperv.isolation_config_a, ms_hyperv.isolation_config_b); diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index 0924bbd8458e..7537ae1db828 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -35,7 +35,17 @@ struct ms_hyperv_info { u32 max_vp_index; u32 max_lp_index; u32 isolation_config_a; - u32 isolation_config_b; + union { + u32 isolation_config_b; + struct { + u32 cvm_type : 4; + u32 reserved11 : 1; + u32 shared_gpa_boundary_active : 1; + u32 shared_gpa_boundary_bits : 6; + u32 reserved12 : 20; + }; + }; + u64 shared_gpa_boundary; }; extern struct ms_hyperv_info ms_hyperv;