Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand

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To: Dave Hansen <dave.hansen@xxxxxxxxx>
Subject: Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand
From: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Date: Mon, 3 Jul 2023 12:38:33 +0200
Cc: Sean Christopherson <seanjc@xxxxxxxxxx>, Isaku Yamahata <isaku.yamahata@xxxxxxxxx>, Kai Huang <kai.huang@xxxxxxxxx>, "kvm@xxxxxxxxxxxxxxx" <kvm@xxxxxxxxxxxxxxx>, Ashok Raj <ashok.raj@xxxxxxxxx>, Tony Luck <tony.luck@xxxxxxxxx>, "david@xxxxxxxxxx" <david@xxxxxxxxxx>, "bagasdotme@xxxxxxxxx" <bagasdotme@xxxxxxxxx>, "ak@xxxxxxxxxxxxxxx" <ak@xxxxxxxxxxxxxxx>, Rafael J Wysocki <rafael.j.wysocki@xxxxxxxxx>, "kirill.shutemov@xxxxxxxxxxxxxxx" <kirill.shutemov@xxxxxxxxxxxxxxx>, Reinette Chatre <reinette.chatre@xxxxxxxxx>, "pbonzini@xxxxxxxxxx" <pbonzini@xxxxxxxxxx>, "mingo@xxxxxxxxxx" <mingo@xxxxxxxxxx>, "tglx@xxxxxxxxxxxxx" <tglx@xxxxxxxxxxxxx>, "linux-kernel@xxxxxxxxxxxxxxx" <linux-kernel@xxxxxxxxxxxxxxx>, "linux-mm@xxxxxxxxx" <linux-mm@xxxxxxxxx>, Isaku Yamahata <isaku.yamahata@xxxxxxxxx>, "nik.borisov@xxxxxxxx" <nik.borisov@xxxxxxxx>, "hpa@xxxxxxxxx" <hpa@xxxxxxxxx>, Sagi Shahar <sagis@xxxxxxxxxx>, "imammedo@xxxxxxxxxx" <imammedo@xxxxxxxxxx>, "bp@xxxxxxxxx" <bp@xxxxxxxxx>, Chao Gao <chao.gao@xxxxxxxxx>, Len Brown <len.brown@xxxxxxxxx>, "sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx" <sathyanarayanan.kuppuswamy@xxxxxxxxxxxxxxx>, Ying Huang <ying.huang@xxxxxxxxx>, Dan J Williams <dan.j.williams@xxxxxxxxx>, "x86@xxxxxxxxxx" <x86@xxxxxxxxxx>
In-reply-to: <ade3ca18-659c-26d2-c158-372ba39531c8@intel.com>
References: <cover.1687784645.git.kai.huang@intel.com> <104d324cd68b12e14722ee5d85a660cccccd8892.1687784645.git.kai.huang@intel.com> <20230628131717.GE2438817@hirez.programming.kicks-ass.net> <0c9639db604a0670eeae5343d456e43d06b35d39.camel@intel.com> <20230630092615.GD2533791@hirez.programming.kicks-ass.net> <2659d6eef84f008635ba300f4712501ac88cef2c.camel@intel.com> <20230630183020.GA4253@hirez.programming.kicks-ass.net> <20230630190514.GH3436214@ls.amr.corp.intel.com> <ZJ9IKALhz1Q6ogu1@google.com> <ade3ca18-659c-26d2-c158-372ba39531c8@intel.com>

On Fri, Jun 30, 2023 at 04:13:39PM -0700, Dave Hansen wrote:

> I honestly don't care all that much either way.  There's an escape hatch
> at runtime (reload kvm_intel.ko) no matter what we do.

Please try with my MODULE=n kernel ;-) localyesconfig FTW.

References:
- [PATCH v12 00/22] TDX host kernel support
  - From: Kai Huang
- [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand
  - From: Kai Huang
- Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand
  - From: Peter Zijlstra
- Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand
  - From: Huang, Kai
- Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand
  - From: Peter Zijlstra
- Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand
  - From: Huang, Kai
- Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand
  - From: Peter Zijlstra
- Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand
  - From: Isaku Yamahata
- Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand
  - From: Sean Christopherson
- Re: [PATCH v12 07/22] x86/virt/tdx: Add skeleton to enable TDX on demand
  - From: Dave Hansen

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