Re: [PATCH v7 06/20] x86/virt/tdx: Shut down TDX module in case of error

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To: Dave Hansen <dave.hansen@xxxxxxxxx>
Subject: Re: [PATCH v7 06/20] x86/virt/tdx: Shut down TDX module in case of error
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Tue, 22 Nov 2022 20:14:21 +0100
Cc: Kai Huang <kai.huang@xxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, kvm@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx, seanjc@xxxxxxxxxx, pbonzini@xxxxxxxxxx, dan.j.williams@xxxxxxxxx, rafael.j.wysocki@xxxxxxxxx, kirill.shutemov@xxxxxxxxxxxxxxx, ying.huang@xxxxxxxxx, reinette.chatre@xxxxxxxxx, len.brown@xxxxxxxxx, tony.luck@xxxxxxxxx, ak@xxxxxxxxxxxxxxx, isaku.yamahata@xxxxxxxxx, chao.gao@xxxxxxxxx, sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx, bagasdotme@xxxxxxxxx, sagis@xxxxxxxxxx, imammedo@xxxxxxxxxx
In-reply-to: <bea49f7f-8411-662f-9fa8-97c98f61ce8b@intel.com>
References: <cover.1668988357.git.kai.huang@intel.com> <48505089b645019a734d85c2c29f3c8ae2dbd6bd.1668988357.git.kai.huang@intel.com> <bea49f7f-8411-662f-9fa8-97c98f61ce8b@intel.com>

On Tue, Nov 22, 2022 at 10:57:52AM -0800, Dave Hansen wrote:

> To me, this starts to veer way too far into internal implementation details.
> 
> 	Issue the TDH.SYS.LP.SHUTDOWN SEAMCALL on all BIOS-enabled CPUs
> 	to shut down the TDX module.

We really need to let go of the whole 'all BIOS-enabled CPUs' thing.

Follow-Ups:
- Re: [PATCH v7 06/20] x86/virt/tdx: Shut down TDX module in case of error
  - From: Huang, Kai

References:
- [PATCH v7 00/20] TDX host kernel support
  - From: Kai Huang
- [PATCH v7 06/20] x86/virt/tdx: Shut down TDX module in case of error
  - From: Kai Huang
- Re: [PATCH v7 06/20] x86/virt/tdx: Shut down TDX module in case of error
  - From: Dave Hansen

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