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From: David Woodhouse <dwmw2@infradead.org>
To: Thomas Gleixner <tglx@linutronix.de>,
	LKML <linux-kernel@vger.kernel.org>
Cc: x86@kernel.org, Peter Zijlstra <peterz@infradead.org>,
	Borislav Petkov <bp@alien8.de>
Subject: Re: [PATCH] x86/mce: Make machine check speculation protected
Date: Thu, 18 Jan 2018 16:55:15 +0100	[thread overview]
Message-ID: <1516290915.4937.156.camel@infradead.org> (raw)
In-Reply-To: <alpine.DEB.2.20.1801181626290.1847@nanos>

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On Thu, 2018-01-18 at 16:28 +0100, Thomas Gleixner wrote:
> The machine check idtentry uses an indirect branch directly from the low
> level code. This evades the speculation protection.
> 
> Replace it by a direct call into C code and issue the indirect call there
> so the compiler can apply the proper speculation protection.
> 
> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

Reviewed-by: David Woodhouse <dwmw@amazon.co.uk>

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  parent reply	other threads:[~2018-01-18 15:55 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-18 15:28 [PATCH] x86/mce: Make machine check speculation protected Thomas Gleixner
2018-01-18 15:46 ` Peter Zijlstra
2018-01-18 15:53 ` Borislav Petkov
2018-01-18 15:55 ` David Woodhouse [this message]
2018-01-19  8:46 ` Woodhouse, David
2018-01-19 15:46 ` [tip:x86/pti] " tip-bot for Thomas Gleixner

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