From: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
To: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>,
Paolo Bonzini <pbonzini@redhat.com>, Peter Anvin <hpa@zytor.com>,
Borislav Petkov <bp@suse.de>, Vlastimil Babka <vbabka@suse.cz>,
Tony Luck <tony.luck@intel.com>,
Fenghua Yu <fenghua.yu@intel.com>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Borislav Petkov <bp@alien8.de>, Brian Gerst <brgerst@gmail.com>,
Jonathan Corbet <corbet@lwn.net>,
"Ravi V. Shankar" <ravi.v.shankar@intel.com>,
ricardo.neri-calderon@linux.intel.com,
Chris Metcalf <cmetcalf@mellanox.com>,
Andrew Morton <akpm@linux-foundation.org>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
Masami Hiramatsu <mhiramat@kernel.org>,
Andrew Lutomirski <luto@kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
ray.huang@amd.com, "Michael S. Tsirkin" <mst@redhat.com>,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
Peter Zijlstra <peterz@infradead.org>,
Chen Yucong <slaoub@gmail.com>, Ingo Molnar <mingo@kernel.org>,
Jiri Slaby <jslaby@suse.cz>, Shuah Khan <shuah@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
"linux-tip-commits@vger.kernel.org\"
<linux-tip-commits@vger.kernel.org>"@fuzix.org
Subject: Re: [tip:x86/asm] x86/umip: Add emulation code for UMIP instructions
Date: Wed, 8 Nov 2017 17:24:04 +0000 [thread overview]
Message-ID: <20171108172404.128c53fb@alans-desktop> (raw)
In-Reply-To: <3cdde8ac-500c-ddad-5ea5-a733e2c98d84@redhat.com>
On Wed, 8 Nov 2017 17:53:12 +0100
Denys Vlasenko <dvlasenk@redhat.com> wrote:
> On 11/08/2017 05:34 PM, Linus Torvalds wrote:
> > On Wed, Nov 8, 2017 at 8:14 AM, Denys Vlasenko <dvlasenk@redhat.com> wrote:
> >>
> >> Can we avoid maintain emulation of these isns, by asking Wine to remove
> >> their use instead?
> >
> > If we ask the Wine people to remove the instruction use, that may mean
> > that we can avoid the emulation in four or five _years_ once everybody
> > has updated.
> >
> > But it wouldn't mean that we could avoid it today.
>
> We can postpone enabling UMIP by default by a year or so.
> By this time, new Wine will be on majority of users' machines.
And because Wine compatibility is a bit random at times many users will
have multiple wine versiosn at once on their system which they expect to
continue to work as they used to. For gaming in particularl that isn't
going to change. There are even front ends that let you package up games
with the right matching wine they were tested with.
Alan
next prev parent reply other threads:[~2017-11-08 17:27 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-06 2:27 [PATCH v11 00/12] x86: Enable User-Mode Instruction Prevention Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 01/12] x86/insn-eval: Compute linear address in several utility functions Ricardo Neri
2017-11-08 10:57 ` [tip:x86/asm] " tip-bot for Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 02/12] x86/insn-eval: Add support to resolve 32-bit address encodings Ricardo Neri
2017-11-08 10:58 ` [tip:x86/asm] " tip-bot for Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 03/12] x86/insn-eval: Add wrapper function for 32 and 64-bit addresses Ricardo Neri
2017-11-08 10:58 ` [tip:x86/asm] " tip-bot for Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 04/12] x86/insn-eval: Handle 32-bit address encodings in virtual-8086 mode Ricardo Neri
2017-11-08 10:59 ` [tip:x86/asm] " tip-bot for Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 05/12] x86/insn-eval: Add support to resolve 16-bit address encodings Ricardo Neri
2017-11-08 10:59 ` [tip:x86/asm] " tip-bot for Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 06/12] x86/cpufeature: Add User-Mode Instruction Prevention definitions Ricardo Neri
2017-11-08 10:59 ` [tip:x86/asm] " tip-bot for Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 07/12] x86: Add emulation code for UMIP instructions Ricardo Neri
2017-11-08 11:00 ` [tip:x86/asm] x86/umip: " tip-bot for Ricardo Neri
2017-11-08 16:14 ` Denys Vlasenko
2017-11-08 16:34 ` Linus Torvalds
2017-11-08 16:38 ` H. Peter Anvin
2017-11-08 16:53 ` Denys Vlasenko
2017-11-08 16:57 ` Linus Torvalds
2017-11-08 17:09 ` Denys Vlasenko
2017-11-08 17:14 ` Paolo Bonzini
2017-11-08 17:24 ` Denys Vlasenko
2017-11-09 6:17 ` Ricardo Neri
2017-11-08 17:24 ` Alan Cox [this message]
2017-11-09 6:13 ` Ricardo Neri
2017-11-09 6:11 ` Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 08/12] x86/umip: Force a page fault when unable to copy emulated result to user Ricardo Neri
2017-11-08 11:00 ` [tip:x86/asm] " tip-bot for Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 09/12] x86: Enable User-Mode Instruction Prevention at runtime Ricardo Neri
2017-11-08 9:52 ` Ingo Molnar
2017-11-09 5:51 ` Ricardo Neri
2017-11-08 11:01 ` [tip:x86/asm] x86/umip: " tip-bot for Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 10/12] x86/traps: Fixup general protection faults caused by UMIP Ricardo Neri
2017-11-08 11:01 ` [tip:x86/asm] x86/traps: Fix up " tip-bot for Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 11/12] selftests/x86: Add tests for User-Mode Instruction Prevention Ricardo Neri
2017-11-08 11:02 ` [tip:x86/asm] " tip-bot for Ricardo Neri
2017-11-06 2:27 ` [PATCH v11 12/12] selftests/x86: Add tests for instruction str and sldt Ricardo Neri
2017-11-08 11:02 ` [tip:x86/asm] selftests/x86: Add tests for the STR and SLDT instructions tip-bot for Ricardo Neri
2017-11-08 10:00 ` [PATCH v11 00/12] x86: Enable User-Mode Instruction Prevention Thomas Gleixner
2017-11-09 5:46 ` Ricardo Neri
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