linux-kernel - Re: [PATCH v11 04/20] x86/cpu: Detect TDX partial write machine check erratum

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Message-ID: <9cb242a0f5a6638770753b24ebd09e09ca047766.camel@intel.com>
Date:   Wed, 7 Jun 2023 22:43:02 +0000
From:   "Huang, Kai" <kai.huang@...el.com>
To:     "kvm@...r.kernel.org" <kvm@...r.kernel.org>,
        "Hansen, Dave" <dave.hansen@...el.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "Luck, Tony" <tony.luck@...el.com>,
        "david@...hat.com" <david@...hat.com>,
        "bagasdotme@...il.com" <bagasdotme@...il.com>,
        "ak@...ux.intel.com" <ak@...ux.intel.com>,
        "Wysocki, Rafael J" <rafael.j.wysocki@...el.com>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
        "Chatre, Reinette" <reinette.chatre@...el.com>,
        "Christopherson,, Sean" <seanjc@...gle.com>,
        "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "tglx@...utronix.de" <tglx@...utronix.de>,
        "Yamahata, Isaku" <isaku.yamahata@...el.com>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "Shahar, Sagi" <sagis@...gle.com>,
        "imammedo@...hat.com" <imammedo@...hat.com>,
        "Gao, Chao" <chao.gao@...el.com>,
        "Brown, Len" <len.brown@...el.com>,
        "sathyanarayanan.kuppuswamy@...ux.intel.com" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        "Huang, Ying" <ying.huang@...el.com>,
        "Williams, Dan J" <dan.j.williams@...el.com>
Subject: Re: [PATCH v11 04/20] x86/cpu: Detect TDX partial write machine check
 erratum

On Wed, 2023-06-07 at 07:15 -0700, Hansen, Dave wrote:
> On 6/4/23 07:27, Kai Huang wrote:
> > TDX memory has integrity and confidentiality protections.  Violations of
> > this integrity protection are supposed to only affect TDX operations and
> > are never supposed to affect the host kernel itself.  In other words,
> > the host kernel should never, itself, see machine checks induced by the
> > TDX integrity hardware.
> 
> At the risk of patting myself on the back by acking a changelog that I
> wrote 95% of:
> 
> Reviewed-by: Dave Hansen <dave.hansen@...ux.intel.com>
> 

Thanks!