Re: [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()

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To: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: Re: [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
From: Dave Hansen <dave.hansen@xxxxxxxxx>
Date: Fri, 15 Jun 2018 13:45:21 -0700
Cc: Ingo Molnar <mingo@xxxxxxxxxx>, x86@xxxxxxxxxx, Thomas Gleixner <tglx@xxxxxxxxxxxxx>, "H. Peter Anvin" <hpa@xxxxxxxxx>, Tom Lendacky <thomas.lendacky@xxxxxxx>, Kai Huang <kai.huang@xxxxxxxxxxxxxxx>, Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>, linux-kernel@xxxxxxxxxxxxxxx, linux-mm@xxxxxxxxx
In-reply-to: <20180615204512.axt2avr4ysc2iyrp@black.fi.intel.com>
Openpgp: preference=signencrypt
References: <20180612143915.68065-1-kirill.shutemov@linux.intel.com> <20180612143915.68065-8-kirill.shutemov@linux.intel.com> <8c31f6d2-6512-2726-763e-6dd1cbb0350a@intel.com> <20180615125720.r755xaegvfcqfr6x@black.fi.intel.com> <645a4ca8-ae77-dcdd-0cbc-0da467fc210d@intel.com> <20180615152731.3y6rre7g66rmncxr@black.fi.intel.com> <cbca7e78-d70b-3eae-1c73-6ad859661b8a@intel.com> <20180615160613.arntdivl5gdpfwfw@black.fi.intel.com> <445af5b3-eaca-0589-8899-88a3b26fb509@intel.com> <20180615204512.axt2avr4ysc2iyrp@black.fi.intel.com>
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On 06/15/2018 01:45 PM, Kirill A. Shutemov wrote:
> On Fri, Jun 15, 2018 at 04:58:24PM +0000, Dave Hansen wrote:
>> On 06/15/2018 09:06 AM, Kirill A. Shutemov wrote:
>>> I have no idea what such concept should be called. I cannot come with
>>> anything better than PTE_PFN_MASK_MAX. Do you?
>> PTE_PRESERVE_MASK
>>
>> Or maybe:
>>
>> PTE_MODIFY_PRESERVE_MASK
> It just replacing one confusion with another. Preserve what?

"Preserve this mask when modifying pte permission bits"

Follow-Ups:
- Re: [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
  - From: Kirill A. Shutemov

References:
- [PATCHv3 00/17] MKTME enabling
  - From: Kirill A. Shutemov
- [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
  - From: Kirill A. Shutemov
- Re: [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
  - From: Dave Hansen
- Re: [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
  - From: Kirill A. Shutemov
- Re: [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
  - From: Dave Hansen
- Re: [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
  - From: Kirill A. Shutemov
- Re: [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
  - From: Dave Hansen
- Re: [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
  - From: Kirill A. Shutemov
- Re: [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
  - From: Dave Hansen
- Re: [PATCHv3 07/17] x86/mm: Preserve KeyID on pte_modify() and pgprot_modify()
  - From: Kirill A. Shutemov

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