From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f170.google.com (mail-pg1-f170.google.com [209.85.215.170]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 689C16FD6 for ; Thu, 3 Nov 2022 14:00:52 +0000 (UTC) Received: by mail-pg1-f170.google.com with SMTP id q71so1728323pgq.8 for ; Thu, 03 Nov 2022 07:00:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=xa+0pLAudD6PF06JImFuL7wHTWb9VCg28osWFz6WhGY=; b=fJPJDNbojQCIWRnIYnzAvODJUoL1TR6QAu0UwsxvlNSTyVDdKT94NGT9bNHO8H3ZGC Qjj1ShOVMKmQZNpRQq35lslk8d864Tn4pRM3am8HvXi0P+QvxUoVPXhbzqt9KQLIcAZj hDDSCBB23VxtVeyw7oDQHBf5ga3KOy7ONW3ZozO224wMLz/l6L8+kQqfu+G/fZdp6NB0 xBc8fs150Vp7/hnwYZXhIsKnATAogsditSiwHDiznGXzlYmqvB74huK95HMmJldE+JTA s2lJK57Q9DP/PbWgeHEQH6yeABAMAeySnaKWytYPw6hMtbhAE1YbdlIs2M5QQC8bBlx4 EuKQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:in-reply-to:from:references:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=xa+0pLAudD6PF06JImFuL7wHTWb9VCg28osWFz6WhGY=; b=5sEgTazkzfJJvSG7fKd/9SU5xCy82ErXRzqb/8yR6f0XlrNlVbgoMUB3wgJM+y7mVv awgr0bP52WUkZOSiOjsVAqAoxUudju8s5/GFk6kyG0PNPnQMG/PNI8b/HW6npTxn1xOL 9B2TyRWAAUV8NYsBGpmmRcwF+Li68W2mCIC9R5ykIwhZz9PZZvpi0kqBDsMutf7z6Q1P +uy7fwFli8nNZTzUB/kEEhyMgDw0Y+VM9fSjo4yf6a1IPQmusx61khyBUaaavRjoOrta 6qeube03cUEcOFOEHgJEa5LhXOj3duSHHpfyWSEItGpH5Kqdr4BZm0UDa0vJawRWCpPz jftA== X-Gm-Message-State: ACrzQf0RdbmKEz7dZ8XxUd7+7c6Dt5EKnLp61Hm22YMLY0NGSkrT8B4l GIp3FpBTAzFq1dJspvj2FMY= X-Google-Smtp-Source: AMsMyM4O0wDTELSc3hfPrRbSa50TbC9VySJnF/LiWdrNYmNQeUji+UKtn2FJqVoSfqerI/f2rbEuzg== X-Received: by 2002:a05:6a00:e0f:b0:56d:6e51:3060 with SMTP id bq15-20020a056a000e0f00b0056d6e513060mr22351121pfb.55.1667484051717; Thu, 03 Nov 2022 07:00:51 -0700 (PDT) Received: from ?IPV6:2404:f801:0:5:8000::75b? ([2404:f801:9000:18:efec::75b]) by smtp.gmail.com with ESMTPSA id e18-20020a17090301d200b00177f25f8ab3sm725747plh.89.2022.11.03.07.00.39 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 03 Nov 2022 07:00:51 -0700 (PDT) Message-ID: <1eedc23a-8b50-bd90-d398-cff3f22af01e@gmail.com> Date: Thu, 3 Nov 2022 22:00:39 +0800 Precedence: bulk X-Mailing-List: iommu@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:102.0) Gecko/20100101 Thunderbird/102.4.1 Subject: Re: [PATCH 05/12] x86/hyperv: Change vTOM handling to use standard coco mechanisms Content-Language: en-US To: Michael Kelley , hpa@zytor.com, kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, decui@microsoft.com, luto@kernel.org, peterz@infradead.org, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, lpieralisi@kernel.org, robh@kernel.org, kw@linux.com, bhelgaas@google.com, arnd@arndb.de, hch@infradead.org, m.szyprowski@samsung.com, robin.murphy@arm.com, thomas.lendacky@amd.com, brijesh.singh@amd.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, Tianyu.Lan@microsoft.com, kirill.shutemov@linux.intel.com, sathyanarayanan.kuppuswamy@linux.intel.com, ak@linux.intel.com, isaku.yamahata@intel.com, dan.j.williams@intel.com, jane.chu@oracle.com, seanjc@google.com, tony.luck@intel.com, x86@kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, netdev@vger.kernel.org, linux-pci@vger.kernel.org, linux-arch@vger.kernel.org, iommu@lists.linux.dev References: <1666288635-72591-1-git-send-email-mikelley@microsoft.com> <1666288635-72591-6-git-send-email-mikelley@microsoft.com> From: Tianyu Lan In-Reply-To: <1666288635-72591-6-git-send-email-mikelley@microsoft.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/21/2022 1:57 AM, Michael Kelley wrote: > + > +void __init hv_vtom_init(void) > +{ > + cc_set_vendor(CC_VENDOR_HYPERV); > + cc_set_mask(ms_hyperv.shared_gpa_boundary); > + physical_mask &= ms_hyperv.shared_gpa_boundary - 1; hv_vtom_init() also works for VBS case. VBS doesn't have vTOM support and so shared_gpa_boundary should not be applied for VBS. Here seems to assume ms_hyperv.shared_gpa_boundary to 0 for VBS, right?