linux-kernel - Re: [PATCH v2 09/25] x86/virt/tdx: Add SEAMCALL wrappers for TDX VM/vCPU field access

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Message-ID: <710a55a508d4fb3da5aa57667fe03f5b5dd5896f.camel@gmail.com>
Date: Sun, 05 Jan 2025 10:45:58 +0100
From: Francesco Lavra <francescolavra.fl@...il.com>
To: rick.p.edgecombe@...el.com
Cc: binbin.wu@...ux.intel.com, isaku.yamahata@...il.com, 
 isaku.yamahata@...el.com, kai.huang@...el.com, kvm@...r.kernel.org, 
 linux-kernel@...r.kernel.org, pbonzini@...hat.com,
 reinette.chatre@...el.com,  sean.j.christopherson@...el.com,
 seanjc@...gle.com,  tony.lindgren@...ux.intel.com, xiaoyao.li@...el.com,
 yan.y.zhao@...el.com,  yuan.yao@...el.com
Subject: Re: [PATCH v2 09/25] x86/virt/tdx: Add SEAMCALL wrappers for TDX
 VM/vCPU field access

On 2024-10-30 at 19:00, Rick Edgecombe wrote:

> From: Isaku Yamahata <isaku.yamahata@...el.com>
> 
> Intel TDX protects guest VMs from malicious host and certain physical
> attacks. The TDX module has TD scoped and vCPU scoped "metadata
> fields".
> These fields are a bit like VMCS fields, and stored in data
> structures
> maintained by the TDX module. Export 3 SEAMCALLs for use in reading
> and
> writing these fields:
> 
> Make tdh_mng_rd() use MNG.VP.RD to read the TD scoped metadata.

s/MNG.VP.RD/TDH.MNG.RD/