From: Khalid Aziz <khalid.aziz@oracle.com>
To: Dave Hansen <dave.hansen@linux.intel.com>,
Andy Lutomirski <luto@amacapital.net>
Cc: Rob Gardner <rob.gardner@oracle.com>,
David Miller <davem@davemloft.net>,
Jonathan Corbet <corbet@lwn.net>,
Andrew Morton <akpm@linux-foundation.org>,
dingel@linux.vnet.ibm.com, bob.picco@oracle.com,
"Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Arnd Bergmann <arnd@arndb.de>,
sparclinux@vger.kernel.org, Michal Hocko <mhocko@suse.cz>,
chris.hyser@oracle.com, Richard Weinberger <richard@nod.at>,
Vlastimil Babka <vbabka@suse.cz>,
Konstantin Khlebnikov <koct9i@gmail.com>,
Oleg Nesterov <oleg@redhat.com>, Greg Thelen <gthelen@google.com>,
Jan Kara <jack@suse.cz>,
xiexiuqi@huawei.com, Vineet.Gupta1@synopsys.com,
Andrew Lutomirski <luto@kernel.org>,
"Eric W. Biederman" <ebiederm@xmission.com>,
bsegall@google.com, Geert Uytterhoeven <geert@linux-m68k.org>,
Davidlohr Bueso <dave@stgolabs.net>,
Alexey Dobriyan <adobriyan@gmail.com>,
"linux-doc@vger.kernel.org" <linux-doc@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-mm@kvack.org" <linux-mm@kvack.org>,
linux-arch <linux-arch@vger.kernel.org>,
Linux API <linux-api@vger.kernel.org>
Subject: Re: [PATCH v2] sparc64: Add support for Application Data Integrity (ADI)
Date: Mon, 7 Mar 2016 11:39:15 -0700 [thread overview]
Message-ID: <56DDCAD3.3090106@oracle.com> (raw)
In-Reply-To: <56DDC47C.8010206@linux.intel.com>
On 03/07/2016 11:12 AM, Dave Hansen wrote:
> On 03/07/2016 09:53 AM, Andy Lutomirski wrote:
>> Also, what am I missing? Tying these tags to the physical page seems
>> like a poor design to me. This seems really awkward to use.
>
> Yeah, can you describe the structures that store these things? Surely
> the hardware has some kind of lookup tables for them and stores them in
> memory _somewhere_.
>
Version tags are tied to virtual addresses, not physical pages.
Where exactly are the tags stored is part of processor architecture and
I am not privy to that. MMU stores these lookup tables somewhere and
uses it to authenticate access to virtual addresses. It really is
irrelevant to kernel how MMU implements access controls as long as we
have access to the knowledge of how to use it.
Thanks,
Khalid
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next prev parent reply other threads:[~2016-03-07 18:39 UTC|newest]
Thread overview: 62+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-03-02 20:39 [PATCH v2] sparc64: Add support for Application Data Integrity (ADI) Khalid Aziz
2016-03-02 23:08 ` Julian Calaby
2016-03-03 0:25 ` Khalid Aziz
2016-03-03 0:48 ` Julian Calaby
2016-03-03 17:28 ` Khalid Aziz
2016-03-06 4:07 ` David Miller
2016-03-07 15:07 ` Khalid Aziz
2016-03-07 15:30 ` Rob Gardner
2016-03-07 15:43 ` Andy Lutomirski
2016-03-07 16:06 ` Khalid Aziz
2016-03-07 17:46 ` Dave Hansen
2016-03-07 17:53 ` Andy Lutomirski
2016-03-07 18:12 ` Dave Hansen
2016-03-07 18:39 ` Khalid Aziz [this message]
2016-03-07 18:53 ` Andy Lutomirski
2016-03-07 19:22 ` David Miller
2016-03-07 19:46 ` Khalid Aziz
2016-03-07 22:40 ` Dave Hansen
2016-03-08 1:31 ` Rob Gardner
2016-03-07 21:06 ` Khalid Aziz
2016-03-08 19:57 ` David Miller
2016-03-08 20:16 ` Khalid Aziz
2016-03-08 20:27 ` David Miller
2016-03-08 20:59 ` Khalid Aziz
2016-03-07 15:45 ` Khalid Aziz
2016-03-07 16:45 ` David Miller
2016-03-07 17:51 ` Khalid Aziz
2016-03-07 16:56 ` David Miller
2016-03-07 18:04 ` Khalid Aziz
2016-03-07 18:08 ` Andy Lutomirski
2016-03-07 18:22 ` Khalid Aziz
2016-03-07 18:49 ` Andy Lutomirski
2016-03-07 19:19 ` David Miller
2016-03-07 19:44 ` Khalid Aziz
2016-03-07 19:54 ` Andy Lutomirski
2016-03-07 20:41 ` Khalid Aziz
2016-03-07 20:58 ` David Miller
2016-03-07 21:02 ` Andy Lutomirski
2016-03-07 21:09 ` Khalid Aziz
2016-03-07 23:34 ` James Morris
2016-03-07 23:48 ` James Morris
2016-03-08 9:33 ` James Morris
2016-03-07 18:09 ` Rob Gardner
2016-03-07 18:24 ` Khalid Aziz
2016-03-07 19:16 ` David Miller
2016-03-07 21:33 ` Khalid Aziz
2016-03-07 21:38 ` David Miller
2016-03-07 23:13 ` Rob Gardner
2016-03-08 4:13 ` David Miller
2016-03-07 23:12 ` Rob Gardner
2016-03-07 23:27 ` Khalid Aziz
2016-03-08 0:21 ` Khalid Aziz
2016-03-08 4:24 ` David Miller
2016-03-07 23:32 ` Rob Gardner
2016-03-07 19:09 ` David Miller
2016-03-07 21:27 ` Khalid Aziz
2016-03-07 21:34 ` David Miller
2016-03-07 22:30 ` Khalid Aziz
2016-03-07 17:32 ` Dave Hansen
2016-03-07 17:35 ` Dave Hansen
2016-03-07 18:15 ` Khalid Aziz
2016-03-07 19:06 ` David Miller
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