From mboxrd@z Thu Jan 1 00:00:00 1970 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 E3EBAC43460 for ; Tue, 13 Apr 2021 15:22:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id CA7B361244 for ; Tue, 13 Apr 2021 15:22:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1346666AbhDMPXK (ORCPT ); Tue, 13 Apr 2021 11:23:10 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:43014 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346610AbhDMPW5 (ORCPT ); Tue, 13 Apr 2021 11:22:57 -0400 Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0ABECC061574; Tue, 13 Apr 2021 08:22:36 -0700 (PDT) Received: by mail-pj1-x102d.google.com with SMTP id i4so8643327pjk.1; Tue, 13 Apr 2021 08:22:36 -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=Iz6kQKmaAStJz2j939/tUEj2NIuTRDYIEtDill+C7IA=; b=kPgGShid5KtLdAcFrxnSdrTQ/LbNOifiNeCDVvStk5TPMNbaVeqB0A4C9dJM6BaSgi CsrgfmqhC+wVq0PA/+TrV7yVroifmywSMb/s4vV5zdt1ZO5dF7SnTsZZ6S3J54eZq+dZ 1nap+lP5B7a0E0Zl/TzH4+gs7R76sFtw/YnvNcJTHpVy6lPjaT5mBsHpoIlWhYX2Iu1x GZjiAjVOiUHOuWIk6ohqk2lG0kCL4gNFmRNPqKAQQj47DyWuPqoT+yiHh6I4FIDYZFwU cC6qcyJh4rmx1onn0MoSYQtGSaEkd5thkDyS3R/eMtQ/XywZymCssTOkPtUH2Aikh4OM yQBA== 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=Iz6kQKmaAStJz2j939/tUEj2NIuTRDYIEtDill+C7IA=; b=cKW8QpLm3RZbayU6mAc5Kox3VOEoYkmtMgP3ekLYS/F0R1wnoyFgD8q8AfLTQ7rwig EQXkWUTOHYBSK8BSy7MzLsiGjag9D+Lg9cbEi3sq/7sbNEpVPIznZFDzNsUf4ytnCTGP HY309YQ4liP2dB74IVg1AKbuXJC34AXWs/OhWyVzdGKdecvtZtPfSxUweZJVSQwvZXPP I+x1M/3Req+YIELRGHgrpk7X9PhHSwNZgGg27WnPAj5RyVdEi3FsqvpMgiNEby48N2L5 J/rmMcevtRG6dfJMaUwFFx3JGzHEkB4VQ6CABKmN7DYGrlxfpMwownsKwp2imP/UJznB Cngw== X-Gm-Message-State: AOAM53154lJk/N1A0DZrypAgfa2oLTthYZtUsoEqxvfDpdRmyHRQqYCS MlQ1zBMyXotgLDubOMqhLJw= X-Google-Smtp-Source: ABdhPJwF6x+dCEgMGkpNtT/LK3yQhlUypo9k1WRbpOfhNSHgmT3dnzCHLCpU6JCRmpg9ooV2lxKDgA== X-Received: by 2002:a17:90b:4d05:: with SMTP id mw5mr559318pjb.236.1618327355626; Tue, 13 Apr 2021 08:22:35 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:36:5b29:fe1a:45c9:c61c]) by smtp.gmail.com with ESMTPSA id y3sm12882026pfg.145.2021.04.13.08.22.34 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Apr 2021 08:22:35 -0700 (PDT) From: Tianyu Lan To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, x86@kernel.org, hpa@zytor.com, arnd@arndb.de Cc: Tianyu Lan , linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, vkuznets@redhat.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, sunilmut@microsoft.com Subject: [RFC V2 PATCH 2/12] x86/HV: Initialize shared memory boundary in Isolation VM Date: Tue, 13 Apr 2021 11:22:07 -0400 Message-Id: <20210413152217.3386288-3-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210413152217.3386288-1-ltykernel@gmail.com> References: <20210413152217.3386288-1-ltykernel@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@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 AMD SEV SNP guest. Signed-off-by: Tianyu Lan --- arch/x86/kernel/cpu/mshyperv.c | 2 ++ include/asm-generic/mshyperv.h | 13 ++++++++++++- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c index e88bc296afca..aeafd4017c89 100644 --- a/arch/x86/kernel/cpu/mshyperv.c +++ b/arch/x86/kernel/cpu/mshyperv.c @@ -328,6 +328,8 @@ static void __init ms_hyperv_init_platform(void) if (ms_hyperv.features_b & 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 c6f4c5c20fb8..b73e201abc70 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -34,8 +34,19 @@ 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; -- 2.25.1