From patchwork Mon Aug 9 17:56:06 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 12427053 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 B4EA6C43214 for ; Mon, 9 Aug 2021 17:56:45 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8C5EE61056 for ; Mon, 9 Aug 2021 17:56:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235159AbhHIR47 (ORCPT ); Mon, 9 Aug 2021 13:56:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36564 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234974AbhHIR4w (ORCPT ); Mon, 9 Aug 2021 13:56:52 -0400 Received: from mail-pl1-x62f.google.com (mail-pl1-x62f.google.com [IPv6:2607:f8b0:4864:20::62f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 595E8C06179C; Mon, 9 Aug 2021 10:56:29 -0700 (PDT) Received: by mail-pl1-x62f.google.com with SMTP id j3so17318325plx.4; Mon, 09 Aug 2021 10:56:29 -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=WJ8Qj60FdMGjOsTL0G9bdAidXdjqOzX7Q2WO2gNuvy8=; b=kCOSzGmSmj2pkcs1y/QfkWI/Rb7FWu5Rt4HurHSycKb+4UJ6Aawe7iIjpLCK57NZvg WiKFB2lpA+UNPjQlXnkCjTyoLNfzfD6exWmoaSXwOTH3P5K09H7X97U+U6AERK1MWKDZ Uf9gBLdRp3afuP7JcZ7KvCly3MyakdtS0qQtW8YXpaZpP2oaIZuXn8AWr8r0q7m5PL19 tGreCVJAddF2G7xYeJM4tw24jIsggOxYdQF69HhvqJzxkbw7sa2z7MLBTUyIBYEQNqtI yiQt/exmEXhRuDLkVp63WhMYXTqisSEe9mzIC1qRRU8DWNDpsvO5gCpWRZsGVSmFCKkw sUiA== 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=WJ8Qj60FdMGjOsTL0G9bdAidXdjqOzX7Q2WO2gNuvy8=; b=qzp9xn46NHhTrMe+dvIRhF0qGVtOBLrA6uFaeJTU1zYKav7RRsAlSiKYm7oIm3Ov8I RhW0XauiwZJgFH7ZGeBFkMY87IhT04Ok4avindz17tPqs4jpmFvHJIY9FCpf+LReykBU xjobERBU1zEMdBYTboYSFrNEdjp9HB3+3P913zVu6yv0n2p+qmuHONRQfsFnRNFSrb0m OFei3k8ya3fDie450Xq76hH42DLdf7iAzq5HlrSwnpsloWFA/PZ9Nk76j1NZDIpc7TmO NwnpXlqfRBvIZEZRQLHhWtZ7BsHtR+iaLYlanNEg8GAKKYSE5YFCc13i8DRNqeM7n6NH 2+4Q== X-Gm-Message-State: AOAM5324zkOMPffvGYDmduiJZ0wQs9dpwIp+S/4rmh5oT+GgnOAri2rM k/l4O/R6N27ZnUpIO+X8haw= X-Google-Smtp-Source: ABdhPJxmwF3scgEEjXrYinjzLnwHVvcE27E2cso3ne1oTy5d8B/iiqwH78j0wxYg/3jFPvSCO0RgTg== X-Received: by 2002:a62:1c42:0:b029:3c3:59ee:6068 with SMTP id c63-20020a621c420000b02903c359ee6068mr19584222pfc.72.1628531788936; Mon, 09 Aug 2021 10:56:28 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:2:106e:6ed1:5da1:2ac4]) by smtp.gmail.com with ESMTPSA id x14sm20589708pfa.127.2021.08.09.10.56.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Aug 2021 10:56:28 -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, thomas.lendacky@amd.com, brijesh.singh@amd.com, ardb@kernel.org, Tianyu.Lan@microsoft.com, pgonda@google.com, martin.b.radev@gmail.com, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, rppt@kernel.org, sfr@canb.auug.org.au, saravanand@fb.com, krish.sadhukhan@oracle.com, aneesh.kumar@linux.ibm.com, xen-devel@lists.xenproject.org, rientjes@google.com, hannes@cmpxchg.org, tj@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 V3 02/13] x86/HV: Initialize shared memory boundary in the Isolation VM. Date: Mon, 9 Aug 2021 13:56:06 -0400 Message-Id: <20210809175620.720923-3-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210809175620.720923-1-ltykernel@gmail.com> References: <20210809175620.720923-1-ltykernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-scsi@vger.kernel.org From: Tianyu Lan Hyper-V 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 6b5835a087a3..2b7f396ef1a5 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 = + (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 4269f3174e58..aa26d24a5ca9 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -35,8 +35,18 @@ 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;