From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: linuxppc-dev@lists.ozlabs.org,
Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Cc: linux-kselftest@vger.kernel.org, mpe@ellerman.id.au
Subject: Re: [PATCH] selftests/powerpc/spectre_v2: Return skip code when miss_percent is high
Date: Wed, 15 Dec 2021 11:24:40 +1100 [thread overview]
Message-ID: <163952788080.919625.5237049240642905738.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <20211207130557.40566-1-cascardo@canonical.com>
On Tue, 7 Dec 2021 10:05:57 -0300, Thadeu Lima de Souza Cascardo wrote:
> A mis-match between reported and actual mitigation is not restricted to the
> Vulnerable case. The guest might also report the mitigation as "Software
> count cache flush" and the host will still mitigate with branch cache
> disabled.
>
> So, instead of skipping depending on the detected mitigation, simply skip
> whenever the detected miss_percent is the expected one for a fully
> mitigated system, that is, above 95%.
>
> [...]
Applied to powerpc/next.
[1/1] selftests/powerpc/spectre_v2: Return skip code when miss_percent is high
https://git.kernel.org/powerpc/c/3c42e9542050d49610077e083c7c3f5fd5e26820
cheers
WARNING: multiple messages have this Message-ID (diff)
From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: linuxppc-dev@lists.ozlabs.org,
Thadeu Lima de Souza Cascardo <cascardo@canonical.com>
Cc: linux-kselftest@vger.kernel.org
Subject: Re: [PATCH] selftests/powerpc/spectre_v2: Return skip code when miss_percent is high
Date: Wed, 15 Dec 2021 11:24:40 +1100 [thread overview]
Message-ID: <163952788080.919625.5237049240642905738.b4-ty@ellerman.id.au> (raw)
In-Reply-To: <20211207130557.40566-1-cascardo@canonical.com>
On Tue, 7 Dec 2021 10:05:57 -0300, Thadeu Lima de Souza Cascardo wrote:
> A mis-match between reported and actual mitigation is not restricted to the
> Vulnerable case. The guest might also report the mitigation as "Software
> count cache flush" and the host will still mitigate with branch cache
> disabled.
>
> So, instead of skipping depending on the detected mitigation, simply skip
> whenever the detected miss_percent is the expected one for a fully
> mitigated system, that is, above 95%.
>
> [...]
Applied to powerpc/next.
[1/1] selftests/powerpc/spectre_v2: Return skip code when miss_percent is high
https://git.kernel.org/powerpc/c/3c42e9542050d49610077e083c7c3f5fd5e26820
cheers
next prev parent reply other threads:[~2021-12-15 0:26 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-07 13:05 [PATCH] selftests/powerpc/spectre_v2: Return skip code when miss_percent is high Thadeu Lima de Souza Cascardo
2021-12-07 13:05 ` Thadeu Lima de Souza Cascardo
2021-12-15 0:24 ` Michael Ellerman [this message]
2021-12-15 0:24 ` Michael Ellerman
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