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From: Andy Lutomirski <luto@amacapital.net>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>, X86 ML <x86@kernel.org>,
	One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
	Borislav Petkov <bp@alien8.de>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	Brian Gerst <brgerst@gmail.com>,
	Matthew Whitehead <tedheadster@gmail.com>,
	Henrique de Moraes Holschuh <hmh@hmh.eng.br>,
	Denys Vlasenko <dvlasenk@redhat.com>,
	"H . Peter Anvin" <hpa@zytor.com>,
	Josh Poimboeuf <jpoimboe@redhat.com>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>
Subject: Re: [PATCH 2/4] Revert "x86/boot: Fail the boot if !M486 and CPUID is missing"
Date: Thu, 1 Dec 2016 09:00:51 -0800	[thread overview]
Message-ID: <CALCETrWvHga_AFBmF5zu+RbcLjqmqABCRFToN9uNezN2Tq59yQ@mail.gmail.com> (raw)
In-Reply-To: <20161201055350.GH3092@twins.programming.kicks-ass.net>

On Wed, Nov 30, 2016 at 9:53 PM, Peter Zijlstra <peterz@infradead.org> wrote:
> On Wed, Nov 30, 2016 at 12:34:53PM -0800, Andy Lutomirski wrote:
>> This reverts commit ed68d7e9b9cfb64f3045ffbcb108df03c09a0f98.
>>
>> The patch wasn't quite correct -- there are non-Intel (and hence
>> non-486) CPUs that we support that don't have CPUID.  Since we no
>> longer require CPUID for sync_core(), just revert the patch.
>
> Might be useful to enumerate which special parts these are.

Alan thought it was Geode and Elan, right?  I can add that to the
commit message if I do a v2.

--Andy

  parent reply	other threads:[~2016-12-01 17:01 UTC|newest]

Thread overview: 65+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-11-30 20:34 [PATCH 0/4] CPUID-less CPU fixes and improvements Andy Lutomirski
2016-11-30 20:34 ` [PATCH 1/4] x86/asm/32: Make sync_core() handle missing CPUID on all 32-bit kernels Andy Lutomirski
2016-11-30 20:34 ` [PATCH 2/4] Revert "x86/boot: Fail the boot if !M486 and CPUID is missing" Andy Lutomirski
2016-12-01  5:53   ` Peter Zijlstra
2016-12-01  9:02     ` Borislav Petkov
2016-12-01 10:07       ` Thomas Gleixner
2016-12-01 11:15         ` [PATCH] x86/CPU: Add X86_FEATURE_CPUID Borislav Petkov
2016-12-01 17:00           ` Andy Lutomirski
2016-12-02  0:33       ` [PATCH 2/4] Revert "x86/boot: Fail the boot if !M486 and CPUID is missing" Andy Lutomirski
2016-12-01 17:00     ` Andy Lutomirski [this message]
2016-11-30 20:34 ` [PATCH 3/4] x86/microcode/intel: Replace sync_core() with cpuid_eax(1) Andy Lutomirski
2016-12-01  9:11   ` Borislav Petkov
2016-11-30 20:34 ` [PATCH 4/4] x86/asm: Change sync_core() to use MOV to CR2 to serialize Andy Lutomirski
2016-12-01  9:22   ` Borislav Petkov
2016-12-01 17:08     ` Andy Lutomirski
2016-12-01 17:46       ` Andrew Cooper
2016-12-02  7:34     ` Ingo Molnar
2016-12-02  0:34 ` [PATCH v2 0/6] CPUID-less CPU/sync_core fixes and improvements Andy Lutomirski
2016-12-02  0:34   ` [PATCH v2 1/6] x86/asm/32: Make sync_core() handle missing CPUID on all 32-bit kernels Andy Lutomirski
2016-12-02  0:34   ` [PATCH v2 2/6] Revert "x86/boot: Fail the boot if !M486 and CPUID is missing" Andy Lutomirski
2016-12-02  0:34   ` [PATCH v2 3/6] x86/microcode/intel: Replace sync_core() with cpuid_eax(1) Andy Lutomirski
2016-12-02  0:35   ` [PATCH v2 4/6] x86/paravirt: Make sync_core() be a paravirt op Andy Lutomirski
2016-12-02  0:35   ` [PATCH v2 5/6] x86/xen: Add a Xen-specific sync_core() implementation Andy Lutomirski
2016-12-02 11:44     ` Andrew Cooper
2016-12-02 11:44     ` Andrew Cooper
2016-12-02 17:07       ` Andy Lutomirski
2016-12-02 17:07       ` Andy Lutomirski
2016-12-02 17:16         ` Andrew Cooper
2016-12-02 17:16         ` Andrew Cooper
2016-12-02 17:23           ` Andy Lutomirski
2016-12-02 17:26             ` Andrew Cooper
2016-12-02 17:26             ` Andrew Cooper
2016-12-02 17:23           ` Andy Lutomirski
2016-12-02 18:50       ` Boris Ostrovsky
2016-12-02 18:50       ` Boris Ostrovsky
2016-12-02 19:34         ` Andy Lutomirski
2016-12-02 19:34         ` Andy Lutomirski
2016-12-02 20:09       ` Boris Ostrovsky
2016-12-02 20:09         ` Boris Ostrovsky
2016-12-02 17:32     ` Linus Torvalds
2016-12-02 17:38       ` Andy Lutomirski
2016-12-02 17:53         ` Linus Torvalds
2016-12-02 18:03         ` Borislav Petkov
2016-12-02 18:27           ` Linus Torvalds
2016-12-02 18:50             ` Borislav Petkov
2016-12-02 19:03               ` Linus Torvalds
2016-12-02 19:20                 ` Borislav Petkov
2016-12-02 19:24                   ` Linus Torvalds
2016-12-02 19:28                     ` Borislav Petkov
2016-12-03 15:02                       ` [PATCH] x86/alternatives: Do not use sync_core() to serialize I$ Borislav Petkov
2016-12-03 17:05                         ` Andy Lutomirski
2016-12-20  7:58                         ` [tip:x86/urgent] " tip-bot for Borislav Petkov
2016-12-20  9:35                         ` tip-bot for Borislav Petkov
2016-12-02 19:30                     ` [PATCH v2 5/6] x86/xen: Add a Xen-specific sync_core() implementation Andy Lutomirski
2016-12-02 19:35                       ` Linus Torvalds
2016-12-02 20:41                         ` Andy Lutomirski
2016-12-02 21:10                           ` Linus Torvalds
2016-12-02 22:55                             ` Andy Lutomirski
2016-12-02 23:09                               ` Linus Torvalds
2016-12-02 19:23                 ` Andy Lutomirski
2016-12-02 19:30                   ` Borislav Petkov
2016-12-03 12:44         ` Borislav Petkov
2016-12-02  0:35   ` [PATCH v2 6/6] x86/asm: Change sync_core() to use MOV to CR2 to serialize Andy Lutomirski
2016-12-02  0:36 ` [PATCH 0/4] CPUID-less CPU fixes and improvements Andy Lutomirski
2016-12-02 10:17   ` Ingo Molnar

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