From patchwork Sun May 30 15:06:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 450437 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 305A5C47091 for ; Sun, 30 May 2021 15:06:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 145406124B for ; Sun, 30 May 2021 15:06:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229837AbhE3PIU (ORCPT ); Sun, 30 May 2021 11:08:20 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229818AbhE3PIS (ORCPT ); Sun, 30 May 2021 11:08:18 -0400 Received: from mail-pl1-x62c.google.com (mail-pl1-x62c.google.com [IPv6:2607:f8b0:4864:20::62c]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B84DAC061574; Sun, 30 May 2021 08:06:40 -0700 (PDT) Received: by mail-pl1-x62c.google.com with SMTP id h12so3924675plf.11; Sun, 30 May 2021 08:06:40 -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=TDI4PXumIZgxBePNd+ivE0VBcCC0VeGNDBRFqyds1eM=; b=UAse3Bpl0FAVPqqhfAnA0zSsTcxrZbreVrQAzodtanCUm4szgJIEyR5+ecqtW5IpAX wvxV8auZOSKfuO8TZ4M8rO/crEbVTyzAM6eyp3NoWTLuD78xXlOdpNL1GTvOv05hTOvw IJKNjFYyz12ZXEp+aAdaQoUfunooYgNvY+tYgiYWzR7jphXnzg+LZ0lYvuQrvoitNAPI 3dFo+NHKOib8S6vhPQHgJFZuloR8beErGmtrAztyIobPte+3TQ3S9eDUgC3gZiqCjgrA 2cjMlhmbzneoHRsMOP9QRH/YU9YL8UrYLz+ibUTPFCQMKMdfS1dZjF7iQIxOaa2us5Nb DDlA== 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=TDI4PXumIZgxBePNd+ivE0VBcCC0VeGNDBRFqyds1eM=; b=XUbVj5i1uW1RwmpTlP9r3FeZ+gF1QLThiRXOpHhilrEvv8VvK40qcrouwN9bBYOkw3 KA/FIhtRfZVbspgCrZMDy9+3zdCWzpVC+ztLVJMtb7P/QTob5kr+hl4m74q8BzUHeCnM UK8pH7/V5WdghhoxlVTqEld5Hx+X2IWimtptvWyfjuZc1su1cUZfFXt4Rp+YBu3NwYI5 rncwTfADOAxqiY2tjaiE1BOqlsL+mBhyz+yAuFkQy6kc003kEGqyPbLYJiwYW5nLbN91 nt3u1snPyyGXuJ9srXl9iShdYC+ccYhFK4G2mbG4Dkkp3UGfil/9cSzTHlqFw1f/7WZd CauA== X-Gm-Message-State: AOAM5337eeyhVH91dk1XmlTwq0/1CcZUsnlknaIBkFGIFFyRhu5bP5oG lZy4jUv+Fsq982+efo5iU4Y= X-Google-Smtp-Source: ABdhPJw6VTPU9WI3kHLEFrQaIMTpdWgtR9lc2XZhC9GhjxtOkcyL5lpx/QGe3K50jPAfDu6vcR2b5Q== X-Received: by 2002:a17:90a:80c5:: with SMTP id k5mr6957940pjw.129.1622387200366; Sun, 30 May 2021 08:06:40 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:9:dc2d:80ab:c3f3:1524]) by smtp.gmail.com with ESMTPSA id b15sm8679688pfi.100.2021.05.30.08.06.39 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 30 May 2021 08:06:39 -0700 (PDT) From: Tianyu Lan To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, arnd@arndb.de, dave.hansen@linux.intel.com, luto@kernel.org, peterz@infradead.org, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, rppt@kernel.org, hannes@cmpxchg.org, cai@lca.pw, krish.sadhukhan@oracle.com, saravanand@fb.com, Tianyu.Lan@microsoft.com, konrad.wilk@oracle.com, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, boris.ostrovsky@oracle.com, jgross@suse.com, sstabellini@kernel.org, joro@8bytes.org, will@kernel.org, xen-devel@lists.xenproject.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.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, thomas.lendacky@amd.com, brijesh.singh@amd.com, sunilmut@microsoft.com Subject: [RFC PATCH V3 02/11] x86/HV: Initialize shared memory boundary in the Isolation VM. Date: Sun, 30 May 2021 11:06:19 -0400 Message-Id: <20210530150628.2063957-3-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210530150628.2063957-1-ltykernel@gmail.com> References: <20210530150628.2063957-1-ltykernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Tianyu Lan Hyper-V also 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 --- 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 22f13343b5da..d1ca36224657 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -320,6 +320,8 @@ 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 = + (u64)1 << 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 3ae56a29594f..2914e27b0429 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -34,8 +34,18 @@ 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; + }; + }; void __percpu **ghcb_base; + u64 shared_gpa_boundary; }; extern struct ms_hyperv_info ms_hyperv;