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From: "Tian, Kevin" <kevin.tian@intel.com>
To: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
	"Pan, Jacob jun" <jacob.jun.pan@intel.com>
Cc: "Raj, Ashok" <ashok.raj@intel.com>,
	"Kirill A. Shutemov" <kirill@shutemov.name>,
	Ashok Raj <ashok_raj@linux.intel.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	"Lutomirski, Andy" <luto@kernel.org>,
	"Peter Zijlstra" <peterz@infradead.org>,
	"x86@kernel.org" <x86@kernel.org>,
	"Kostya Serebryany" <kcc@google.com>,
	Andrey Ryabinin <ryabinin.a.a@gmail.com>,
	Andrey Konovalov <andreyknvl@gmail.com>,
	Alexander Potapenko <glider@google.com>,
	Taras Madan <tarasmadan@google.com>,
	Dmitry Vyukov <dvyukov@google.com>,
	"H . J . Lu" <hjl.tools@gmail.com>,
	Andi Kleen <ak@linux.intel.com>,
	"Edgecombe, Rick P" <rick.p.edgecombe@intel.com>,
	"linux-mm@kvack.org" <linux-mm@kvack.org>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Jason Gunthorpe <jgg@nvidia.com>,
	"Joerg Roedel" <joro@8bytes.org>
Subject: RE: [PATCHv8 00/11] Linear Address Masking enabling
Date: Wed, 21 Sep 2022 09:36:25 +0000	[thread overview]
Message-ID: <BN9PR11MB52769D9ECC43029B8B7DDAFC8C4F9@BN9PR11MB5276.namprd11.prod.outlook.com> (raw)
In-Reply-To: <20220915172858.pl62a5w3m5binxrk@box.shutemov.name>

> From: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
> Sent: Friday, September 16, 2022 1:29 AM
> 
> I really struggle with naming here. Any suggestions on what XXX has to be
> replaced with? I don't think it has to be limited to LAM as some other
> tagging implementation may come later.

What about ARCH_ENABLE_TAGGED_ADDR_CPU to mark that the application
tags address only on CPU and pays attention to untag when the address is
programmed to a device?

w/ ARCH_ENABLE_TAGGED_ADDR_CPU then LAM and SVA can co-exist.

The original ARCH_ENABLE_TAGGED_ADDR means that tagged address is
used on both CPU and device. Enabling sva on a device behind an iommu
which doesn't support LAM is then rejected if LAM has been enabled. and
vice versa.

Thanks
Kevin


  parent reply	other threads:[~2022-09-21  9:36 UTC|newest]

Thread overview: 67+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-08-30  1:00 [PATCHv8 00/11] Linear Address Masking enabling Kirill A. Shutemov
2022-08-30  1:00 ` [PATCHv8 01/11] x86/mm: Fix CR3_ADDR_MASK Kirill A. Shutemov
2022-08-30  1:00 ` [PATCHv8 02/11] x86: CPUID and CR3/CR4 flags for Linear Address Masking Kirill A. Shutemov
2022-08-30  1:00 ` [PATCHv8 03/11] mm: Pass down mm_struct to untagged_addr() Kirill A. Shutemov
2022-08-30  1:00 ` [PATCHv8 04/11] x86/mm: Handle LAM on context switch Kirill A. Shutemov
2022-08-30  1:00 ` [PATCHv8 05/11] x86/uaccess: Provide untagged_addr() and remove tags before address check Kirill A. Shutemov
2022-08-30  1:00 ` [PATCHv8 06/11] x86/mm: Provide arch_prctl() interface for LAM Kirill A. Shutemov
2022-08-30  1:01 ` [PATCHv8 07/11] x86: Expose untagging mask in /proc/$PID/arch_status Kirill A. Shutemov
2022-08-30  1:01 ` [PATCHv8 08/11] selftests/x86/lam: Add malloc and tag-bits test cases for linear-address masking Kirill A. Shutemov
2022-08-30  1:01 ` [PATCHv8 09/11] selftests/x86/lam: Add mmap and SYSCALL " Kirill A. Shutemov
2022-09-07  3:19   ` Robert Hoo
2022-09-09 11:24     ` Zhang, Weihong
2022-08-30  1:01 ` [PATCHv8 10/11] selftests/x86/lam: Add io_uring " Kirill A. Shutemov
2022-08-30  1:01 ` [PATCHv8 11/11] selftests/x86/lam: Add inherit " Kirill A. Shutemov
2022-09-01 17:45 ` [PATCHv8 00/11] Linear Address Masking enabling Ashok Raj
2022-09-04  0:39   ` Kirill A. Shutemov
2022-09-09 16:08     ` Ashok Raj
2022-09-12 20:39       ` Jacob Pan
2022-09-12 21:41         ` Dave Hansen
2022-09-12 22:55           ` Jacob Pan
2022-09-13  0:06             ` Kirill A. Shutemov
2022-09-13  0:23           ` Ashok Raj
2022-09-12 22:49     ` Kirill A. Shutemov
2022-09-13  0:08       ` Jacob Pan
2022-09-13  0:18         ` Kirill A. Shutemov
2022-09-14 14:45       ` Kirill A. Shutemov
2022-09-14 15:11         ` Ashok Raj
2022-09-14 15:18           ` Kirill A. Shutemov
2022-09-14 15:31             ` Ashok Raj
2022-09-14 15:45               ` Kirill A. Shutemov
2022-09-14 23:51                 ` Jacob Pan
2022-09-15  9:01                   ` Kirill A. Shutemov
2022-09-15 17:28                     ` Kirill A. Shutemov
2022-09-20 13:14                       ` Jason Gunthorpe
2022-09-20 14:57                         ` Ashok Raj
2022-09-20 16:06                         ` Dave Hansen
2022-09-20 16:27                           ` Jason Gunthorpe
2022-09-20 18:41                             ` Jacob Pan
2022-09-20 18:50                               ` Jason Gunthorpe
2022-09-20 20:44                                 ` Jacob Pan
2022-09-21  0:01                                   ` Jason Gunthorpe
2022-09-21  9:36                       ` Tian, Kevin [this message]
2022-09-21 16:57                       ` Dave Hansen
2022-09-21 17:08                         ` Ashok Raj
2022-09-21 17:11                           ` Dave Hansen
2022-09-21 17:29                             ` Ashok Raj
2022-09-21 18:11                             ` Jason Gunthorpe
2022-09-23  0:42                               ` Kirill A. Shutemov
2022-09-23  5:27                                 ` Ashok Raj
2022-09-23  9:38                                   ` Kirill A. Shutemov
2022-09-23 11:46                                     ` Jason Gunthorpe
2022-09-23 14:18                                       ` Dave Hansen
2022-09-23 14:42                                         ` Jason Gunthorpe
2022-09-23 14:59                                           ` Ashok Raj
2022-09-23 15:28                                         ` Ashok Raj
2022-09-23 15:31                                           ` Dave Hansen
2022-09-23 15:44                                             ` Ashok Raj
2022-09-23 16:23                                               ` Dave Hansen
2022-09-23 16:44                                                 ` Jason Gunthorpe
2022-09-04  1:00 ` Kirill A. Shutemov
2022-09-05  5:05   ` Bharata B Rao
2022-09-05 13:44     ` Kirill A. Shutemov
2022-09-05 14:30       ` Peter Zijlstra
2022-09-05 15:35         ` Kirill A. Shutemov
2022-09-05 15:46           ` Peter Zijlstra
2022-09-05 16:47             ` Kirill A. Shutemov
2022-09-06  8:39               ` Peter Zijlstra

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