From: Borislav Petkov <bp@alien8.de>
To: Jann Horn <jannh@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>,
Dave Hansen <dave.hansen@linux.intel.com>,
x86@kernel.org, "H. Peter Anvin" <hpa@zytor.com>,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] x86/microcode: Be more verbose, especially about loading errors
Date: Wed, 6 Dec 2023 21:31:58 +0100 [thread overview]
Message-ID: <20231206203158.GEZXDaPslvxtOS/gze@fat_crate.local> (raw)
In-Reply-To: <CAG48ez3weAU-Uti0QyBSDNRv8xYqCJ5UbgJvssEWAWpvyon0DA@mail.gmail.com>
On Wed, Dec 06, 2023 at 09:23:48PM +0100, Jann Horn wrote:
> Well, yes, except that if no microcode blob is loaded, you're not
> gonna have the errata fixes and/or security mitigations that you might
> expect to have.
We say that too:
microcode: Current revision: 0x000000f0
microcode: Updated early from: 0x000000be
That second line would be missing.
And updated microcode != microcode version for all the mitigations is
even available.
Therefore, the mitigation fixes all report that too. Look for
"[Mm]icrocode" in the mitigation strings in arch/x86/kernel/cpu/bugs.c.
--
Regards/Gruss,
Boris.
https://people.kernel.org/tglx/notes-about-netiquette
next prev parent reply other threads:[~2023-12-06 20:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-12-06 17:28 Jann Horn
2023-12-06 19:58 ` Borislav Petkov
2023-12-06 20:23 ` Jann Horn
2023-12-06 20:31 ` Borislav Petkov [this message]
2023-12-06 20:51 ` Jann Horn
2023-12-06 21:21 ` Borislav Petkov
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