From: "Raj, Ashok" <ashok.raj@intel.com>
To: Boris Petkov <bp@alien8.de>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Mihai Carabas <mihai.carabas@oracle.com>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@redhat.com>,
Jon Grimm <Jon.Grimm@amd.com>,
kanth.ghatraju@oracle.com, konrad.wilk@oracle.com,
patrick.colp@oracle.com, Thomas Gleixner <tglx@linutronix.de>,
Tom Lendacky <thomas.lendacky@amd.com>, x86-ml <x86@kernel.org>,
linux-kernel@vger.kernel.org, Ashok Raj <ashok.raj@intel.com>
Subject: Re: [PATCH] x86/microcode: Add an option to reload microcode even if revision is unchanged
Date: Wed, 4 Sep 2019 17:21:32 -0700 [thread overview]
Message-ID: <20190905002132.GA26568@otc-nc-03> (raw)
In-Reply-To: <D8A3D2BD-1FD4-4183-8663-3EF02A6099F3@alien8.de>
On Thu, Sep 05, 2019 at 12:12:29AM +0200, Boris Petkov wrote:
> On September 5, 2019 12:06:54 AM GMT+02:00, Boris Ostrovsky <boris.ostrovsky@oracle.com> wrote:
> >Why do we need to taint kernel here? We are not making any changes.
>
> Because this is not a normal operation we want users to do. This is only for testing microcode quicker.
>
> >This won't allow people to load from new microcode blob which I thought
> >was one of the objectives behind this new feature.
>
> You load a new blob the usual way: echo 1 > ...
>
> This is the "unusual" way where you reload an already loaded revision only.
But echo 2 > reload would allow reading a microcode file from
/lib/firmware/intel-ucode/ even if the revision hasn't changed right?
#echo 1 > reload wouldn't load if the revision on disk is same as what's loaded,
and we want to permit that with the echo 2 option.
next prev parent reply other threads:[~2019-09-05 0:21 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-08-29 5:33 [PATCH] x86/microcode: Add an option to reload microcode even if revision is unchanged Ashok Raj
2019-08-29 5:38 ` Raj, Ashok
2019-08-29 6:09 ` Borislav Petkov
2019-08-29 13:02 ` Raj, Ashok
2019-09-03 16:46 ` Borislav Petkov
2019-09-04 22:06 ` Boris Ostrovsky
2019-09-04 22:12 ` Boris Petkov
2019-09-05 0:21 ` Raj, Ashok [this message]
2019-09-05 7:20 ` Borislav Petkov
2019-09-05 10:51 ` Thomas Gleixner
2019-09-05 19:40 ` Raj, Ashok
2019-09-05 19:49 ` Borislav Petkov
2019-09-05 20:20 ` Raj, Ashok
2019-09-05 21:22 ` Thomas Gleixner
2019-09-05 22:27 ` Raj, Ashok
2019-09-06 7:46 ` Borislav Petkov
2019-09-06 12:51 ` Thomas Gleixner
2019-09-06 14:40 ` Johannes Erdfelt
2019-09-06 15:16 ` Borislav Petkov
2019-09-06 15:46 ` Johannes Erdfelt
2019-09-06 16:17 ` Borislav Petkov
2019-09-06 16:43 ` Konrad Rzeszutek Wilk
2019-09-06 17:10 ` Borislav Petkov
2019-09-06 16:52 ` Johannes Erdfelt
2019-09-06 17:17 ` Borislav Petkov
2019-09-06 21:16 ` Thomas Gleixner
2019-09-07 0:33 ` Raj, Ashok
2019-09-07 10:37 ` Thomas Gleixner
2019-09-16 10:36 ` Thomas Gleixner
2019-09-17 0:31 ` Raj, Ashok
2019-09-17 6:37 ` Thomas Gleixner
2019-09-17 6:46 ` Borislav Petkov
2019-09-17 14:29 ` Raj, Ashok
2019-09-19 19:48 ` Mihai Carabas
2019-09-06 16:55 ` Raj, Ashok
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