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From: Peter Zijlstra <peterz@infradead.org>
To: Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>,
	x86@kernel.org, Steven Rostedt <rostedt@goodmis.org>,
	Brian Gerst <brgerst@gmail.com>, Juergen Gross <jgross@suse.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Arnd Bergmann <arnd@arndb.de>
Subject: Re: [patch 16/16] x86/entry: Disable interrupts in IDTENTRY
Date: Wed, 26 Feb 2020 10:23:35 +0100	[thread overview]
Message-ID: <20200226092335.GS18400@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200225224145.764810350@linutronix.de>

On Tue, Feb 25, 2020 at 11:33:37PM +0100, Thomas Gleixner wrote:
> Not all exceptions guarantee to return with interrupts disabled. Disable
> them in idtentry_exit() which is invoked on all regular (non IST) exception
> entry points. Preparatory patch for further consolidation of the return
> code.

ISTR a patch that undoes cond_local_irq_enable() in the various trap
handlers. Did that get lost or is that still on the TODO list somewhere?

Once we do that, this can turn into an assertion that IRQs are in fact
disabled.

  reply	other threads:[~2020-02-26  9:23 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-25 22:33 [patch 00/16] x86/entry: Consolidation - Part IV Thomas Gleixner
2020-02-25 22:33 ` [patch 01/16] x86/entry: Provide IDTENTRY_IST Thomas Gleixner
2020-02-25 22:33 ` [patch 02/16] x86/entry: Convert Machine Check to IDTENTRY_IST Thomas Gleixner
2020-02-25 22:33 ` [patch 03/16] x86/idtentry: Provide IDTENTRY_XEN for XEN/PV Thomas Gleixner
2020-02-25 22:33 ` [patch 04/16] x86/entry: Convert NMI to IDTENTRY_NMI Thomas Gleixner
2020-02-25 22:33 ` [patch 05/16] x86/entry: Convert Debug exception to IDTENTRY_DB Thomas Gleixner
2020-02-25 22:33 ` [patch 06/16] x86/entry/64: Remove error code clearing from #DB and #MCE ASM stub Thomas Gleixner
2020-02-25 22:33 ` [patch 07/16] x86/entry: Provide IDTRENTRY_NOIST variants for #DB and #MC Thomas Gleixner
2020-02-25 22:33 ` [patch 08/16] x86/entry: Implement user mode C entry points for #DB and #MCE Thomas Gleixner
2020-02-25 22:33 ` [patch 09/16] x86/entry: Provide IDTENTRY_DF Thomas Gleixner
2020-02-25 22:33 ` [patch 10/16] x86/entry: Convert double fault exception to IDTENTRY_DF Thomas Gleixner
2020-02-25 22:33 ` [patch 11/16] x86/entry: Switch XEN/PV hypercall entry to IDTENTRY Thomas Gleixner
2020-02-25 22:33 ` [patch 12/16] x86/entry/64: Simplify idtentry_body Thomas Gleixner
2020-02-25 22:33 ` [patch 13/16] x86/entry: Move irqflags and context tracking to C for simple idtentries Thomas Gleixner
2020-02-26  8:05   ` Peter Zijlstra
2020-02-26  9:20     ` Peter Zijlstra
2020-02-26 15:11       ` Andy Lutomirski
2020-02-26 16:28         ` Peter Zijlstra
2020-02-26 19:15           ` Andy Lutomirski
2020-02-26 20:25             ` Thomas Gleixner
2020-02-26 17:05     ` Frederic Weisbecker
2020-02-26 17:09       ` Andy Lutomirski
2020-02-26 17:17         ` Frederic Weisbecker
2020-02-25 22:33 ` [patch 14/16] x86/entry: Provide IDTENTRY_CR2 Thomas Gleixner
2020-02-25 22:33 ` [patch 15/16] x86/entry: Switch page fault exceptions to idtentry_simple Thomas Gleixner
2020-03-05 21:51   ` Andy Lutomirski
2020-03-05 23:02     ` Thomas Gleixner
2020-02-25 22:33 ` [patch 16/16] x86/entry: Disable interrupts in IDTENTRY Thomas Gleixner
2020-02-26  9:23   ` Peter Zijlstra [this message]
2020-02-26 20:21     ` Thomas Gleixner
2020-02-27  8:41       ` Peter Zijlstra

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