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From: Ritesh Harjani (IBM) <ritesh.list@gmail.com>
To: Sayali Patil <sayalip@linux.ibm.com>,
	linuxppc-dev@lists.ozlabs.org, maddy@linux.ibm.com
Cc: linux-kernel@vger.kernel.org, Mahesh Salgaonkar <mahesh@linux.ibm.com>
Subject: Re: [PATCH v2 2/2] lkdtm/powerpc: add PPC_RADIX_TLBIEL test for radix MCE validation
Date: Tue, 19 May 2026 08:19:13 +0530	[thread overview]
Message-ID: <lddgqfkm.ritesh.list@gmail.com> (raw)
In-Reply-To: <85c9b59217bcecb3c7af52e9d5b175266771d7de.1778975974.git.sayalip@linux.ibm.com>

Sayali Patil <sayalip@linux.ibm.com> writes:

> Add a new LKDTM trigger (PPC_RADIX_TLBIEL) that executes a process-scoped
> radix TLBIEL instruction to exercise the radix MMU behaviour and
> associated machine check exception (MCE) handling paths.
>
> This provides a way to validate MCE handling in radix mode. Currently,
> there is no dedicated LKDTM test that exercises this path or allows
> triggering radix-specific machine check behaviour for validation.
>
> The test is only enabled on ppc64 systems with radix MMU
> support and If radix is not active, the trigger is skipped and reported as
> XFAIL.
>

yes, ISA states that RIC=2 and IS=0 is an invalid form of tlbiel causing
machine check.

It's good to have this test case which can test MCE handling while in
radix mmu mode for an invalid TLBIE[L] encoding.

Looks good to me. Feel free to add:
Reviewed-by: Ritesh Harjani (IBM) <ritesh.list@gmail.com>


  reply	other threads:[~2026-05-20  5:49 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-18  6:56 [PATCH v2 0/2] LKDTM powerpc enhancements - Part2 Sayali Patil
2026-05-18  6:56 ` [PATCH v2 1/2] lkdtm/powerpc: add isync after slbmte to enforce SLB update ordering Sayali Patil
2026-05-19  2:24   ` Ritesh Harjani
2026-05-18  6:56 ` [PATCH v2 2/2] lkdtm/powerpc: add PPC_RADIX_TLBIEL test for radix MCE validation Sayali Patil
2026-05-19  2:49   ` Ritesh Harjani [this message]
2026-05-18 11:58 ` [PATCH v2 0/2] LKDTM powerpc enhancements - Part2 Michael Ellerman
2026-05-20  6:29   ` Sayali Patil
2026-05-21 10:21 ` Kees Cook

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