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From: Thomas Gleixner <tglx@linutronix.de>
To: Peter Zijlstra <peterz@infradead.org>
Cc: LKML <linux-kernel@vger.kernel.org>, x86@kernel.org
Subject: Re: [patch 2/5] x86/idt: Add comments about early #PF handling
Date: Thu, 28 May 2020 20:44:06 +0200	[thread overview]
Message-ID: <87pnanoq6h.fsf@nanos.tec.linutronix.de> (raw)
In-Reply-To: <20200528161440.GJ2483@worktop.programming.kicks-ass.net>

Peter Zijlstra <peterz@infradead.org> writes:
> On Thu, May 28, 2020 at 04:53:17PM +0200, Thomas Gleixner wrote:
>> The difference between 32 and 64 bit vs. early #PF handling is not
>> documented. Replace the FIXME at idt_setup_early_pf() with proper comments.
>> + * Note, that X86_64 cannot install the real #PF handler in
>> + * idt_setup_early_traps() because the memory intialization needs the #PF
>> + * handler from the early_idt_handler_array to initialize the early page
>> + * tables.
>
> + "See early_make_pgtables()" ?
>
> I had to frob around in head_64.S to find wth that early handler
> actually did.

True.

  reply	other threads:[~2020-05-28 18:44 UTC|newest]

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-28 14:53 [patch 0/5] x86/idt: Cleanups and consolidation Thomas Gleixner
2020-05-28 14:53 ` [patch 1/5] x86/idt: Mark init only functions __init Thomas Gleixner
2020-05-30  9:57   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-28 14:53 ` [patch 2/5] x86/idt: Add comments about early #PF handling Thomas Gleixner
2020-05-28 16:14   ` Peter Zijlstra
2020-05-28 18:44     ` Thomas Gleixner [this message]
2020-05-30  9:57   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-28 14:53 ` [patch 3/5] x86/idt: Use proper constants for table sizes Thomas Gleixner
2020-05-30  9:57   ` [tip: x86/entry] x86/idt: Use proper constants for table size tip-bot2 for Thomas Gleixner
2020-05-28 14:53 ` [patch 4/5] x86/idt: Cleanup trap_init() Thomas Gleixner
2020-05-30  9:57   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-05-28 14:53 ` [patch 5/5] x86/idt: Consolidate idt functionality Thomas Gleixner
2020-05-28 16:16   ` Peter Zijlstra
2020-05-29  2:58   ` kbuild test robot
2020-05-30  9:57   ` [tip: x86/entry] " tip-bot2 for Thomas Gleixner
2020-06-01 12:55   ` tip-bot2 for Thomas Gleixner

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