linux-kernel - Re: [BUG] crypto: ccp: random crashes after kexec on AMD with PSP since commit 97f9ac3d

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Date:   Wed, 28 Jul 2021 13:05:36 +0200
From:   Jörg Rödel <jroedel@...e.de>
To:     Lucas Nussbaum <lucas.nussbaum@...ia.fr>
Cc:     linux-kernel@...r.kernel.org,
        Tom Lendacky <thomas.lendacky@....com>,
        Brijesh Singh <brijesh.singh@....com>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        Gary Hook <gary.hook@....com>
Subject: Re: [BUG] crypto: ccp: random crashes after kexec on AMD with PSP
 since commit 97f9ac3d


> Am 27.07.2021 um 23:13 schrieb Lucas Nussbaum <lucas.nussbaum@...ia.fr>:
> 
> It is worth noting that there was prior work about getting kexec to
> work with PSP/SEV (commit f8903b3e, "crypto: ccp - fix the SEV probe in
> kexec boot path“).

This patch adds the TMR memory for the PSP. I guess a reboot-notifier is needed which shuts the PSP down and flushes all caches.

Regards,

Jörg