From: Holger Dengler <dengler@linux.ibm.com>
To: Harald Freudenberger <freude@linux.ibm.com>
Cc: fcallies@linux.ibm.com, linux-s390@vger.kernel.org,
Heiko Carstens <hca@linux.ibm.com>,
Vasily Gorbik <gor@linux.ibm.com>,
Alexander Gordeev <agordeev@linux.ibm.com>
Subject: Re: [PATCH v1 1/2] s390/cpacf: Rework cpacf_kma() to return condition code
Date: Tue, 6 Oct 2026 09:48:48 +0200 [thread overview]
Message-ID: <51762259-154f-49a1-8a6f-aff175ee5696@linux.ibm.com> (raw)
In-Reply-To: <20261005141417.65822-2-freude@linux.ibm.com>
On 10/5/26 16:14, Harald Freudenberger wrote:
> The KMA instruction can signal a verification-pattern mismatch (CC 1)
> when a protected key is used, or incomplete processing (CC 2) when a
> sub-block-size chunk is submitted without the appropriate LAAD/LPC
> flag. Both conditions shall be visible to the caller similar like the
> other CPACF instructions.
>
> So rework the cpacf_kma() inline function to return the condition code
> instead of void. However, CC 3 (partial completion) continues to be
> handled internally. Also improve the function to use the CC macros for
> better readability. Additionally add an kmsan_unpoison_memory()
> statement to reflect the updated memory by hardware.
>
> Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Reviewed-by: Holger Dengler <dengler@linux.ibm.com>
--
Mit freundlichen Grüßen / Kind regards
Holger Dengler
next prev parent reply other threads:[~2026-10-06 7:48 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-05 14:14 [PATCH v1 0/2] Rework cpacf_kma() function Harald Freudenberger
2026-10-05 14:14 ` [PATCH v1 1/2] s390/cpacf: Rework cpacf_kma() to return condition code Harald Freudenberger
2026-10-05 14:23 ` sashiko-bot
2026-10-06 7:48 ` Holger Dengler [this message]
2026-10-06 8:30 ` Heiko Carstens
2026-10-06 13:29 ` Harald Freudenberger
2026-10-06 13:39 ` Heiko Carstens
2026-10-06 14:16 ` Harald Freudenberger
2026-10-06 15:13 ` Heiko Carstens
2026-10-05 14:14 ` [PATCH v1 2/2] s390/crypto: Handle cpacf_kma() return code Harald Freudenberger
2026-10-05 14:20 ` sashiko-bot
2026-10-06 7:52 ` Holger Dengler
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