From: Dave Hansen <dave.hansen@intel.com>
To: Ashok Raj <ashok.raj@intel.com>, Borislav Petkov <bp@alien8.de>,
Thomas Gleixner <tglx@linutronix.de>
Cc: LKML <linux-kernel@vger.kernel.org>, x86 <x86@kernel.org>,
Ingo Molnar <mingo@kernel.org>, Tony Luck <tony.luck@intel.com>,
Alison Schofield <alison.schofield@intel.com>,
Reinette Chatre <reinette.chatre@intel.com>,
Tom Lendacky <thomas.lendacky@amd.com>,
Stefan Talpalaru <stefantalpalaru@yahoo.com>,
David Woodhouse <dwmw2@infradead.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Jonathan Corbet <corbet@lwn.net>,
"Rafael J . Wysocki" <rafael@kernel.org>,
Peter Zilstra <peterz@infradead.org>,
Andy Lutomirski <luto@kernel.org>,
Andrew Cooper <Andrew.Cooper3@citrix.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
Martin Pohlack <mpohlack@amazon.de>
Subject: Re: [Patch v3 Part2 3/9] x86/microcode/intel: Fix collect_cpu_info() to reflect current microcode
Date: Wed, 1 Feb 2023 11:13:58 -0800 [thread overview]
Message-ID: <388d0260-042c-209f-a986-c9ca47061b3c@intel.com> (raw)
In-Reply-To: <20230130213955.6046-4-ashok.raj@intel.com>
On 1/30/23 13:39, Ashok Raj wrote:
> Currently collect_cpu_info() is only returning what was cached earlier
> instead of reading the current revision from the proper MSR.
>
> Collect the current revision and report that value instead of reflecting
> what was cached in the past.
>
> [TBD:
> Need to change microcode/amd.c. I didn't quite follow the logic since
> it reports the revision from the patch file, instead of reporting the
> real PATCH_LEVEL MSR.
>
> Untested on AMD.
> ]
This thread is meandering a bit. I think it's because this changelog
doesn't have a problem statement. It's hard to agree on a patch being a
solution to anything if we haven't first agreed on the problem.
What is the problem?
What does this "fix"?
next prev parent reply other threads:[~2023-02-01 19:14 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-30 21:39 [Patch v3 Part2 0/9] x86/microcode: Declare microcode safe for late loading Ashok Raj
2023-01-30 21:39 ` [Patch v3 Part2 1/9] x86/microcode: Taint kernel only if microcode loading was successful Ashok Raj
2023-01-31 11:50 ` Borislav Petkov
2023-01-31 16:51 ` Ashok Raj
2023-01-31 20:20 ` Borislav Petkov
2023-01-31 22:54 ` Ashok Raj
2023-02-01 12:44 ` Borislav Petkov
2023-02-01 15:42 ` Ashok Raj
2023-02-01 21:47 ` Ashok Raj
2023-02-01 22:06 ` Borislav Petkov
2023-02-01 22:19 ` Ashok Raj
2023-02-01 22:26 ` Borislav Petkov
2023-01-31 12:17 ` Li, Aubrey
2023-01-31 15:32 ` Ashok Raj
2023-01-30 21:39 ` [Patch v3 Part2 2/9] x86/microcode: Report invalid writes to reload sysfs file Ashok Raj
2023-01-31 15:57 ` [tip: x86/microcode] x86/microcode: Allow only "1" as a late reload trigger value tip-bot2 for Ashok Raj
2023-01-30 21:39 ` [Patch v3 Part2 3/9] x86/microcode/intel: Fix collect_cpu_info() to reflect current microcode Ashok Raj
2023-01-31 16:48 ` Borislav Petkov
2023-01-31 17:34 ` Luck, Tony
2023-01-31 17:41 ` Ashok Raj
2023-01-31 20:40 ` Borislav Petkov
2023-01-31 20:49 ` Luck, Tony
2023-01-31 21:08 ` Borislav Petkov
2023-01-31 22:32 ` Ashok Raj
2023-01-31 22:43 ` Luck, Tony
2023-02-01 12:53 ` Borislav Petkov
2023-02-01 15:13 ` Ashok Raj
2023-02-01 15:25 ` Borislav Petkov
2023-02-01 16:15 ` Luck, Tony
2023-02-01 19:13 ` Dave Hansen [this message]
2023-02-01 19:32 ` Ashok Raj
2023-01-30 21:39 ` [Patch v3 Part2 4/9] x86/microcode: Do not call apply_microcode() on sibling threads Ashok Raj
2023-02-01 22:21 ` Dave Hansen
2023-02-01 22:40 ` Borislav Petkov
2023-02-02 2:51 ` Ashok Raj
2023-02-02 9:40 ` Borislav Petkov
2023-02-02 16:34 ` Ashok Raj
2023-01-30 21:39 ` [Patch v3 Part2 5/9] x86/microcode: Move late load warning to the same function that taints kernel Ashok Raj
2023-01-30 21:39 ` [Patch v3 Part2 6/9] x86/microcode/intel: Add minimum required revision to microcode header Ashok Raj
2023-01-30 21:39 ` [Patch v3 Part2 7/9] x86/microcode: Add a generic mechanism to declare support for minrev Ashok Raj
2023-01-30 21:39 ` [Patch v3 Part2 8/9] x86/microcode/intel: Drop wbinvd() from microcode loading Ashok Raj
2023-01-30 21:39 ` [Patch v3 Part2 9/9] x86/microcode: Provide an option to override minrev enforcement Ashok Raj
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