linux-kernel - Re: [RFC v2-fix-v2 1/1] x86: Introduce generic protected guest abstraction

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Date:   Wed, 2 Jun 2021 11:29:40 -0700
From:   "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>
To:     Tom Lendacky <thomas.lendacky@....com>,
        Peter Zijlstra <peterz@...radead.org>,
        Andy Lutomirski <luto@...nel.org>,
        Dave Hansen <dave.hansen@...el.com>,
        Tony Luck <tony.luck@...el.com>, Borislav Petkov <bp@...en8.de>
Cc:     Andi Kleen <ak@...ux.intel.com>,
        Kirill Shutemov <kirill.shutemov@...ux.intel.com>,
        Kuppuswamy Sathyanarayanan <knsathya@...nel.org>,
        Dan Williams <dan.j.williams@...el.com>,
        Raj Ashok <ashok.raj@...el.com>,
        Sean Christopherson <seanjc@...gle.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [RFC v2-fix-v2 1/1] x86: Introduce generic protected guest
 abstraction



On 6/2/21 11:19 AM, Tom Lendacky wrote:
> This certainly doesn't capture all of the situations where true would need
> to be returned. For example, SEV, but not SEV-ES, requires that string I/O
> be unrolled, etc.

For AMD following cases should be true right? I can fix it in next version.

case VM_UNROLL_STRING_IO:
case VM_HOST_MEM_ENCRYPT:

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer