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=-13.5 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_RED, USER_AGENT_GIT autolearn=ham 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 724A7C07E9B for ; Wed, 7 Jul 2021 15:35:12 +0000 (UTC) Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 221A961CBF for ; Wed, 7 Jul 2021 15:35:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 221A961CBF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=iommu-bounces@lists.linux-foundation.org Received: from localhost (localhost [127.0.0.1]) by smtp2.osuosl.org (Postfix) with ESMTP id BE88E4059D; Wed, 7 Jul 2021 15:35:11 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Received: from smtp2.osuosl.org ([127.0.0.1]) by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id mqkgG31ecSSX; Wed, 7 Jul 2021 15:35:09 +0000 (UTC) Received: from lists.linuxfoundation.org (lf-lists.osuosl.org [140.211.9.56]) by smtp2.osuosl.org (Postfix) with ESMTPS id 869B540282; Wed, 7 Jul 2021 15:35:09 +0000 (UTC) Received: from lf-lists.osuosl.org (localhost [127.0.0.1]) by lists.linuxfoundation.org (Postfix) with ESMTP id 5EA3DC001A; Wed, 7 Jul 2021 15:35:09 +0000 (UTC) Received: from smtp3.osuosl.org (smtp3.osuosl.org [140.211.166.136]) by lists.linuxfoundation.org (Postfix) with ESMTP id C57CFC000E for ; Wed, 7 Jul 2021 15:35:07 +0000 (UTC) Received: from localhost (localhost [127.0.0.1]) by smtp3.osuosl.org (Postfix) with ESMTP id B385560648 for ; Wed, 7 Jul 2021 15:35:07 +0000 (UTC) X-Virus-Scanned: amavisd-new at osuosl.org Authentication-Results: smtp3.osuosl.org (amavisd-new); dkim=pass (2048-bit key) header.d=gmail.com Received: from smtp3.osuosl.org ([127.0.0.1]) by localhost (smtp3.osuosl.org [127.0.0.1]) (amavisd-new, port 10024) with ESMTP id pMjWkUytiqs1 for ; Wed, 7 Jul 2021 15:35:07 +0000 (UTC) X-Greylist: whitelisted by SQLgrey-1.8.0 Received: from mail-pg1-x532.google.com (mail-pg1-x532.google.com [IPv6:2607:f8b0:4864:20::532]) by smtp3.osuosl.org (Postfix) with ESMTPS id 35C56605AC for ; Wed, 7 Jul 2021 15:35:07 +0000 (UTC) Received: by mail-pg1-x532.google.com with SMTP id u14so2606840pga.11 for ; Wed, 07 Jul 2021 08:35:07 -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=NVwj9Iuc5KEhy+VNjKuoKXzwovkub/uFAwYhE0AnnHBmasJim5Egk/ApBPBkeHElpd Ip4OV9iRzcuH1M98BYimUE0ATtc9OZzjxhp9kVenh+1g2GC7j0FGlwVlX76/eAv9AUy5 9BQLpOGq8N2Gl/12RRnCeEgUIV0/g/2A0sPA+EBgMkN3+JMDARX4y7TLbUDo0GsG2/oC JKM5rBkRlzM/vVRtQvdfIYDxvguje020NHwrbcvP3/tBkvF9IwOH4Gv8qwl1sFaYA/rf CE1zyF098euLk/pqCyShxE6yRwQHIyt8iAJXiqdBMrt+jGjPdOKIVaPjsI5TtBYHsTF2 b/SQ== 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=DuFgAkaOc3/V6pmsOjhfzdRksB62nH/8/2px7HhnXpAm7tmdXAbCRMJF56T/MnQfLD 9jSjPVS6XMED1TshMg1jrEi3NVXVJAqtP13LK4F4k1w+jblQUlbOCfDT5QgqOWx0plxO JAMbjB8I2/R48QeL3In2SH2rHv7Hya3NkW0ENkpFocwfxVl05c67451XO6bNqRJaESU1 25ju7Fk2Fw+k4giWChifMYFqribe9RVcFEuK0hMCt4InO2TDOPSUQHfTnwTSp7ZZ5abo Bxx7yYmcdW1o1UdsvzwOZ6K211IYBrM6yWwUb/WmAfdzClRRSPIFMDE69K5yONKH5rMw hq9A== X-Gm-Message-State: AOAM532NsUHolN3RT9UYPG6iJOD7Tpeqf2VZilK2vHAxuYrpIYF0OWPB 1x1Vs8/Hy9DMJnokoHQotM0= X-Google-Smtp-Source: ABdhPJyEyO7Cyr41C6lgwYWdThy32+NVXiborZ3KnwFy57UZ1FE8H+OlybQRDClF4kF5jUwodhf1Og== X-Received: by 2002:aa7:8e18:0:b029:2ec:a754:570e with SMTP id c24-20020aa78e180000b02902eca754570emr26014073pfr.38.1625672106748; Wed, 07 Jul 2021 08:35:06 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:0:6b7f:cf3e:bbf2:d229]) by smtp.gmail.com with ESMTPSA id y11sm21096877pfo.160.2021.07.07.08.35.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 07 Jul 2021 08:35:06 -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, rppt@kernel.org, akpm@linux-foundation.org, kirill.shutemov@linux.intel.com, Tianyu.Lan@microsoft.com, thomas.lendacky@amd.com, ardb@kernel.org, nramas@linux.microsoft.com, robh@kernel.org, keescook@chromium.org, rientjes@google.com, pgonda@google.com, martin.b.radev@gmail.com, hannes@cmpxchg.org, saravanand@fb.com, krish.sadhukhan@oracle.com, xen-devel@lists.xenproject.org, tj@kernel.org, michael.h.kelley@microsoft.com Subject: [RFC PATCH V4 01/12] x86/HV: Initialize shared memory boundary in the Isolation VM. Date: Wed, 7 Jul 2021 11:34:42 -0400 Message-Id: <20210707153456.3976348-2-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210707153456.3976348-1-ltykernel@gmail.com> References: <20210707153456.3976348-1-ltykernel@gmail.com> MIME-Version: 1.0 Cc: linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, brijesh.singh@amd.com, linux-scsi@vger.kernel.org, netdev@vger.kernel.org, linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org, anparri@microsoft.com, vkuznets@redhat.com X-BeenThere: iommu@lists.linux-foundation.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: Development issues for Linux IOMMU support List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: iommu-bounces@lists.linux-foundation.org Sender: "iommu" 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; -- 2.25.1 _______________________________________________ iommu mailing list iommu@lists.linux-foundation.org https://lists.linuxfoundation.org/mailman/listinfo/iommu