From: Alejandro Vallejo <alejandro.vallejo@cloud.com>
To: Jan Beulich <jbeulich@suse.com>
Cc: "Andrew Cooper" <andrew.cooper3@citrix.com>,
"Roger Pau Monné" <roger.pau@citrix.com>, "Wei Liu" <wl@xen.org>,
Xen-devel <xen-devel@lists.xenproject.org>
Subject: Re: [PATCH v5 3/4] x86: Read MSR_ARCH_CAPS immediately after early_microcode_init()
Date: Wed, 5 Jul 2023 14:19:35 +0100 [thread overview]
Message-ID: <64a56de9.050a0220.a91e8.eeca@mx.google.com> (raw)
In-Reply-To: <64a56c5b.170a0220.c33b5.793c@mx.google.com>
On Wed, Jul 05, 2023 at 02:12:58PM +0100, Alejandro Vallejo wrote:
> Something along this lines would be better?
> ```
> * Microcode updates may change CPUID or MSRs. We need to reload
> * the early subset boot_cpu_data before continuing. Notably tsx_init()
> * needs an up to date MSR_ARCH_CAPS.
> ```
That makes no sense. I sent the email before completing the sentence. I
meant:
```
* Microcode updates may change CPUID or MSRs. We need to reload
* the subset of boot_cpu_data we got on early_cpu_init() before
* continuing. Notably tsx_init() needs an up to date MSR_ARCH_CAPS.
```
Alejandro
next prev parent reply other threads:[~2023-07-05 13:20 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-29 15:26 [PATCH v5 0/4] Prevent attempting updates known to fail Alejandro Vallejo
2023-06-29 15:26 ` [PATCH v5 1/4] x86/microcode: Allow reading microcode revision even if it can't be updated Alejandro Vallejo
2023-07-05 14:00 ` Andrew Cooper
2023-06-29 15:26 ` [PATCH v5 2/4] x86/microcode: Ignore microcode loading interface for revision = -1 Alejandro Vallejo
2023-07-05 14:13 ` Andrew Cooper
2023-07-05 14:24 ` Jan Beulich
2023-07-05 14:28 ` Andrew Cooper
2023-07-05 14:34 ` Jan Beulich
2023-06-29 15:26 ` [PATCH v5 3/4] x86: Read MSR_ARCH_CAPS immediately after early_microcode_init() Alejandro Vallejo
2023-07-05 10:43 ` Jan Beulich
2023-07-05 13:12 ` Alejandro Vallejo
2023-07-05 13:19 ` Alejandro Vallejo [this message]
2023-06-29 15:26 ` [PATCH v5 4/4] x86/microcode: Disable microcode update handler if DIS_MCU_UPDATE is set Alejandro Vallejo
2023-07-05 10:51 ` Jan Beulich
2023-07-05 14:03 ` Alejandro Vallejo
2023-07-05 14:30 ` Jan Beulich
2023-07-05 15:04 ` Alejandro Vallejo
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