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

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Message-ID: <Y30fjcRlXiWFhnym@hirez.programming.kicks-ass.net>
Date:   Tue, 22 Nov 2022 20:14:21 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     Kai Huang <kai.huang@...el.com>, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, linux-mm@...ck.org, seanjc@...gle.com,
        pbonzini@...hat.com, dan.j.williams@...el.com,
        rafael.j.wysocki@...el.com, kirill.shutemov@...ux.intel.com,
        ying.huang@...el.com, reinette.chatre@...el.com,
        len.brown@...el.com, tony.luck@...el.com, ak@...ux.intel.com,
        isaku.yamahata@...el.com, chao.gao@...el.com,
        sathyanarayanan.kuppuswamy@...ux.intel.com, bagasdotme@...il.com,
        sagis@...gle.com, imammedo@...hat.com
Subject: Re: [PATCH v7 06/20] x86/virt/tdx: Shut down TDX module in case of
 error

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.