From patchwork Wed Jul 7 15:46:16 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 12362917 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=-15.7 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 EA07DC07E9E for ; Wed, 7 Jul 2021 15:46:57 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id D6AD961C83 for ; Wed, 7 Jul 2021 15:46:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232345AbhGGPtd (ORCPT ); Wed, 7 Jul 2021 11:49:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57970 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232115AbhGGPtY (ORCPT ); Wed, 7 Jul 2021 11:49:24 -0400 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9DE20C061574; Wed, 7 Jul 2021 08:46:44 -0700 (PDT) Received: by mail-pg1-x532.google.com with SMTP id y4so183099pgl.10; Wed, 07 Jul 2021 08:46:44 -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=0MmjMjO7XvUbpBRdqqPG7tGmikUa5z2pWikCp/JzIEY=; b=UW7L39XXXA0lFLWgWURoFcPlCEh4S4Z8KGVwXPdNWOZ1uC97xNL/QzrnRe932i5Zpl v+us9x+QqUCVOJR7NW0cti8Dlvz3ntW5JBnk3T8mrXTQQXScCfMHjoOC5qWs78n+WXHy l0/TBbeXhFNdgxncs8vmuBc0rOiOjaE2C0pPG29QKAwWxzv4x0ZxqdciLaEAszX0ad2L rytLK20HtdLSd1w9TyUEPQIWBcbAQAlFIoL9atuDdZLes8JZJ04ezb04sQO7vSDnJg/s lgt8L6SFaYrDfbO40RdC74i07ap4lhvqEU/pQl2wDRJfhNq+GPC5XQGz2XIiVhjZjRsT 5j1g== 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=0MmjMjO7XvUbpBRdqqPG7tGmikUa5z2pWikCp/JzIEY=; b=HNTWjxXBityWTHSjLjYbqk4oxtKG6VLY4fLw1zWxhNYc463u+xUaekzXPd2qzaNSWM CUSL+dV62VwIyinomwZ/kmzvPtjrsQmXhcB+TOKObaND7ulEcFZOoM9wUxfgEgaJRtUU cxH+jcqPQIay9rMcr2nn7EXxgGqAnU2WiPu3cL88ZND6lcPfmqI1yVfhS18KwPFVRpXj cYmp0K8xH/Q9du3lYYiV3w/BSEhvs1N7UIFDzGJLSz9USpf9rdpAzeE1clAIOClMBFAc yyk0iFEldosUMUBoigEhIxo/seZv2UMEFvDd0AsMRaTvbyuwkYmmsC9wBR4/G+2Zh1TE d95Q== X-Gm-Message-State: AOAM533ou6EfeR4gydZbPEPBRwmr59WF+F7V9UomQXWa2EUWwko16Nq5 cy3kW8ylMPs2cU/nLVyCngQ= X-Google-Smtp-Source: ABdhPJyAY8zlw6ShjL9q8KFDuhfqbUuaIuxnQh2fAt/BqNVogHlUsHJh8B4rAjBi+hH2uyVONxd4RA== X-Received: by 2002:a05:6a00:8c4:b029:2b4:8334:ed4d with SMTP id s4-20020a056a0008c4b02902b48334ed4dmr25950524pfu.36.1625672804218; Wed, 07 Jul 2021 08:46:44 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:38:6b47:cf3e:bbf2:d229]) by smtp.gmail.com with ESMTPSA id q18sm23093560pgj.8.2021.07.07.08.46.43 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Jul 2021 08:46:43 -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, 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, will@kernel.org, davem@davemloft.net, kuba@kernel.org, jejb@linux.ibm.com, martin.petersen@oracle.com, arnd@arndb.de, hch@lst.de, m.szyprowski@samsung.com, robin.murphy@arm.com, kirill.shutemov@linux.intel.com, akpm@linux-foundation.org, rppt@kernel.org, Tianyu.Lan@microsoft.com, thomas.lendacky@amd.com, ardb@kernel.org, robh@kernel.org, nramas@linux.microsoft.com, pgonda@google.com, martin.b.radev@gmail.com, david@redhat.com, krish.sadhukhan@oracle.com, saravanand@fb.com, xen-devel@lists.xenproject.org, keescook@chromium.org, rientjes@google.com, hannes@cmpxchg.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, brijesh.singh@amd.com, anparri@microsoft.com Subject: [Resend RFC PATCH V4 02/13] x86/HV: Initialize shared memory boundary in the Isolation VM. Date: Wed, 7 Jul 2021 11:46:16 -0400 Message-Id: <20210707154629.3977369-3-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210707154629.3977369-1-ltykernel@gmail.com> References: <20210707154629.3977369-1-ltykernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org X-Patchwork-State: RFC 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 --- 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 10b2a8c10cb6..8aed689db621 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -334,6 +334,8 @@ 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;