From patchwork Thu Sep 30 13:05:38 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tianyu Lan X-Patchwork-Id: 12528267 X-Patchwork-Delegate: kuba@kernel.org Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 164DEC433F5 for ; Thu, 30 Sep 2021 13:05:58 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id F32FC61A07 for ; Thu, 30 Sep 2021 13:05:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1351183AbhI3NHi (ORCPT ); Thu, 30 Sep 2021 09:07:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44028 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1349581AbhI3NHf (ORCPT ); Thu, 30 Sep 2021 09:07:35 -0400 Received: from mail-pf1-x436.google.com (mail-pf1-x436.google.com [IPv6:2607:f8b0:4864:20::436]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B4509C06176A; Thu, 30 Sep 2021 06:05:52 -0700 (PDT) Received: by mail-pf1-x436.google.com with SMTP id s55so3870273pfw.4; Thu, 30 Sep 2021 06:05:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=bh3bd5GoDBhpbfFAmgtElw8PxUdj0XoUDzYAAC0vsTY=; b=IaFusPs1SrrWHh5qPhnz5hMwfF7HQgdev6yycDp8csrtoV431IAg75JVIUuW8t/MdP eLo7gcXTFkgcE4YrnD/WKT3rHaqUa7DUMr1ypc08o4r3DsahJ7PzXUwtjle+cbicu9E7 WkDKZMm2/VkKRK4KU5JWdCmxlATHWxK+jTz4eZZxEhTdAEwmc0ZvdiVbgq3gXkmiX/Zk JCfXqYZvXQw/+j6914cIwtGBIDB8rSnKZ/dQ3f+AWWKOot1/wYRaYwwsOD7ToXB95lmQ BGfbx9i4lkWGns+lYDvlkCtUc13h2CM610nfgUnla3M4+9jpLfSnmB/zqvz/xIRHLauA fwKg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=bh3bd5GoDBhpbfFAmgtElw8PxUdj0XoUDzYAAC0vsTY=; b=lYofZfn/02UPfYq7ZKO9J8xsezEYKDfvSgA13CCkvrztjox2ar+WmIt0Ik2kHpnxir qo73qTw5XAcp0i103waJkY/WASAfvB+1jcYri05tsvNFxOyqUMgVTDziKgzKQPyNi2ic FzEHCW8o18A788wAEhhD9vH9OF/MwThnFlmL5RIE/HIlNR29KbL27rUGHjcj5tacnS7y fcXtv0zWfzyWvk0UE3z8epjY9fT2Y7bYJd0SmPln1m0DB/Xlo9StjAX0JECQ6CJ84AQ0 z+PvmN6OviSVB3RnlY7NBEsFXimhi9Zdx4NSnM1Kl1ykvbQ7Wdy9EwI5MMtA0Ez0DNQ/ IjIw== X-Gm-Message-State: AOAM531leOEI40Y9gKtHvehuSmlLd4NOdS7zhgVsev3itXVdXBko5d2J 7XAGsjoOqISjbr0Z+lWlx9o= X-Google-Smtp-Source: ABdhPJxgq8GMDliebLBl8yV1J8ZS46oOYaNwzW9SvYIp+JmuWQemO1JG79xprnbj0RNgBnclWnTy2Q== X-Received: by 2002:a05:6a00:22cd:b0:43c:9b41:e650 with SMTP id f13-20020a056a0022cd00b0043c9b41e650mr4259994pfj.60.1633007152285; Thu, 30 Sep 2021 06:05:52 -0700 (PDT) Received: from ubuntu-Virtual-Machine.corp.microsoft.com ([2001:4898:80e8:35:a72f:86cf:2cc5:8116]) by smtp.gmail.com with ESMTPSA id v7sm3072134pff.195.2021.09.30.06.05.51 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 30 Sep 2021 06:05:51 -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, davem@davemloft.net, kuba@kernel.org, gregkh@linuxfoundation.org, arnd@arndb.de, brijesh.singh@amd.com, jroedel@suse.de, Tianyu.Lan@microsoft.com, thomas.lendacky@amd.com, pgonda@google.com, akpm@linux-foundation.org, rppt@kernel.org, kirill.shutemov@linux.intel.com, saravanand@fb.com, aneesh.kumar@linux.ibm.com, rientjes@google.com, tj@kernel.org, michael.h.kelley@microsoft.com Cc: linux-arch@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-kernel@vger.kernel.org, netdev@vger.kernel.org, vkuznets@redhat.com, konrad.wilk@oracle.com, hch@lst.de, robin.murphy@arm.com, joro@8bytes.org, parri.andrea@gmail.com, dave.hansen@intel.com Subject: [PATCH V6 2/8] x86/hyperv: Initialize shared memory boundary in the Isolation VM. Date: Thu, 30 Sep 2021 09:05:38 -0400 Message-Id: <20210930130545.1210298-3-ltykernel@gmail.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210930130545.1210298-1-ltykernel@gmail.com> References: <20210930130545.1210298-1-ltykernel@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: netdev@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 --- Change since v4: * Rename reserve field. Change since v3: * user BIT_ULL to get shared_gpa_boundary * Rename field Reserved* to reserved --- 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 b09ade389040..4794b716ec79 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 = + BIT_ULL(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 2a709010f53d..ebe3727e1eb8 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -35,7 +35,17 @@ 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 reserved1 : 1; + u32 shared_gpa_boundary_active : 1; + u32 shared_gpa_boundary_bits : 6; + u32 reserved2 : 20; + }; + }; + u64 shared_gpa_boundary; }; extern struct ms_hyperv_info ms_hyperv;