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From: Alan Cox <gnomes@lxorguk.ukuu.org.uk>
To: David Woodhouse <dwmw2@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>,
	arjan@linux.intel.com, karahmed@amazon.de, x86@kernel.org,
	linux-kernel@vger.kernel.org, tim.c.chen@linux.intel.com,
	bp@alien8.de, peterz@infradead.org, pbonzini@redhat.com,
	ak@linux.intel.com, torvalds@linux-foundation.org,
	gregkh@linux-foundation.org, dave.hansen@intel.com,
	ashok.raj@intel.com, mingo@kernel.org
Subject: Re: [PATCH v4 6/7] x86/cpufeature: Blacklist SPEC_CTRL on early Spectre v2 microcodes
Date: Thu, 25 Jan 2018 16:16:14 +0000	[thread overview]
Message-ID: <20180125161547.33e63bb3@alans-desktop> (raw)
In-Reply-To: <1516887714.30244.121.camel@infradead.org>

> Here's what I have now. I'm happy enough with this, so the main thing
> I'm looking for is an ack from Alan for patch #5 of the series, if I've
> got that sufficiently correct now.

You have my ACK for patch 5: Any further changes I'll submit as updates
once it's merged.

I am happy with patch 5 and I think for 64bit we are probably done for
the mainstream. VIA/Centaur data would be nice.

The microcode otoh I don't think makes sense - do you want to be secure
with a slightly higher risk of crashes or insecure ? Once you can point
at a newer ucode for each case then yes I personally at least think it
then makes sense to tell users they want the newer one.

Alan

  parent reply	other threads:[~2018-01-25 16:16 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-01-25  9:23 [PATCH v4 0/7] Basic Speculation Control feature support David Woodhouse
2018-01-25  9:23 ` [PATCH v4 1/7] x86/cpufeatures: Add CPUID_7_EDX CPUID leaf David Woodhouse
2018-01-25  9:23 ` [PATCH v4 2/7] x86/cpufeatures: Add Intel feature bits for Speculation Control David Woodhouse
2018-01-25  9:23 ` [PATCH v4 3/7] x86/cpufeatures: Add AMD " David Woodhouse
2018-01-25  9:23 ` [PATCH v4 4/7] x86/msr: Add definitions for new speculation control MSRs David Woodhouse
2018-01-25  9:23 ` [PATCH v4 5/7] x86/pti: Do not enable PTI on processors which are not vulnerable to Meltdown David Woodhouse
2018-01-25  9:42   ` Peter Zijlstra
2018-01-25  9:56     ` David Woodhouse
2018-01-25 10:01       ` Thomas Gleixner
2018-01-25 15:12   ` Alan Cox
2018-01-25  9:23 ` [PATCH v4 6/7] x86/cpufeature: Blacklist SPEC_CTRL on early Spectre v2 microcodes David Woodhouse
2018-01-25 10:43   ` David Woodhouse
2018-01-25 10:54     ` Thomas Gleixner
2018-01-25 11:20       ` David Woodhouse
2018-01-25 11:34         ` Thomas Gleixner
2018-01-25 13:41           ` David Woodhouse
2018-01-25 14:58             ` Thomas Gleixner
2018-01-25 16:16             ` Alan Cox [this message]
2018-01-25 16:24               ` Thomas Gleixner
2018-01-25 16:35                 ` David Woodhouse
2018-01-26  9:40             ` Ingo Molnar
2018-01-25  9:23 ` [PATCH v4 7/7] x86/speculation: Add basic IBPB (Indirect Branch Prediction Barrier) support David Woodhouse
2018-01-25 11:41   ` Borislav Petkov
2018-01-25 11:47     ` David Woodhouse
2018-01-25 11:50       ` Borislav Petkov
2018-01-25 11:58         ` David Woodhouse
2018-01-25 12:03           ` Borislav Petkov
2018-01-25 12:11             ` David Woodhouse

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