From: Paolo Bonzini <pbonzini@redhat.com>
To: Borislav Petkov <bp@alien8.de>
Cc: "Luck, Tony" <tony.luck@intel.com>,
Jim Mattson <jmattson@google.com>, Qian Cai <cai@redhat.com>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"linux-tip-commits@vger.kernel.org"
<linux-tip-commits@vger.kernel.org>, x86 <x86@kernel.org>,
"kvm@vger.kernel.org" <kvm@vger.kernel.org>
Subject: Re: [PATCH] x86/mce: Check for hypervisor before enabling additional error logging
Date: Tue, 10 Nov 2020 17:08:31 +0100 [thread overview]
Message-ID: <1b587b45-a5a8-2147-ae53-06d1b284ea11@redhat.com> (raw)
In-Reply-To: <20201110155013.GE9857@nazgul.tnic>
On 10/11/20 16:50, Borislav Petkov wrote:
> I was thinking of
> having a mapping between f/m/s and a list of MSRs which those models
> have - even non-architectural ones - but that's a waste of energy. Why?
> Because using the *msr_safe() variants will give you the same thing
Yes, pretty much.
>> If it makes sense to emulate certain non-architectural MSRs we can add them.
> See above - probably not worth the effort.
When we do, certain Microsoft OSes are usually involved. :)
> I'll take a look at how ugly it would become to make the majority of MSR
> accesses safe.
I think most of them already are, especially the non-architectural ones,
because I remember going through a similar discussion a few years ago
and Andy said basically "screw it, let's just use *_safe anywhere" as
well. I don't see any need to do anything but add it to your review
checklist if you have it (and do it now for MSR_ERROR_CONTROL).
Paolo
next prev parent reply other threads:[~2020-11-10 16:08 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <fcb21490-84a1-8b99-b494-3a6ac2a0e16a@skynet.be>
[not found] ` <20201029100655.GA31903@zn.tnic>
[not found] ` <20201029151518.GA23990@agluck-desk2.amr.corp.intel.com>
[not found] ` <20201029194118.GC31903@zn.tnic>
[not found] ` <87ft5wo8zn.fsf@nanos.tec.linutronix.de>
[not found] ` <20201030091056.GA6532@zn.tnic>
[not found] ` <20201030190400.GA13797@agluck-desk2.amr.corp.intel.com>
2020-10-30 19:08 ` [PATCH] x86/mce: Enable additional error logging on certain Intel CPUs Luck, Tony
2020-11-02 11:12 ` Borislav Petkov
2020-11-02 11:18 ` [tip: ras/core] " tip-bot2 for Tony Luck
2020-11-09 21:55 ` Qian Cai
2020-11-09 22:09 ` Luck, Tony
2020-11-09 22:36 ` Jim Mattson
2020-11-09 22:57 ` Luck, Tony
2020-11-09 23:24 ` [PATCH] x86/mce: Check for hypervisor before enabling additional error logging Luck, Tony
2020-11-10 6:31 ` Borislav Petkov
2020-11-10 8:50 ` Paolo Bonzini
2020-11-10 9:56 ` Borislav Petkov
2020-11-10 10:40 ` Paolo Bonzini
2020-11-10 15:50 ` Borislav Petkov
2020-11-10 16:08 ` Paolo Bonzini [this message]
2020-11-10 17:52 ` Luck, Tony
2020-11-10 20:37 ` Paolo Bonzini
2020-11-11 0:39 ` [PATCH v2] x86/mce: Use "safe" MSR functions when " Luck, Tony
2020-11-16 16:44 ` [tip: ras/core] " tip-bot2 for Tony Luck
2020-11-09 23:26 ` [tip: ras/core] x86/mce: Enable additional error logging on certain Intel CPUs Jim Mattson
2020-11-09 23:36 ` Luck, Tony
2020-11-10 9:10 ` Paolo Bonzini
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