From: Michael Ellerman <patch-notifications@ellerman.id.au>
To: Nicholas Piggin <npiggin@gmail.com>, linuxppc-dev@lists.ozlabs.org
Cc: "Aneesh Kumar K . V" <aneesh.kumar@linux.ibm.com>,
Nicholas Piggin <npiggin@gmail.com>
Subject: Re: powerpc/64s/hash: Fix assert_slb_presence() use of the slbfee. instruction
Date: Fri, 22 Feb 2019 20:48:01 +1100 (AEDT) [thread overview]
Message-ID: <445RNK2klNz9sB3@ozlabs.org> (raw)
In-Reply-To: <20190215102020.24346-1-npiggin@gmail.com>
On Fri, 2019-02-15 at 10:20:20 UTC, Nicholas Piggin wrote:
> The slbfee. instruction must have bit 24 of RB clear, failure to do
> so can result in false negatives that result in incorrect assertions.
>
> This is not obvious from the ISA v3.0B document, which only says:
>
> The hardware ignores the contents of RB 36:38 40:63 -- p.1032
>
> This patch fixes the bug and also clears all other bits from PPC bit
> 36-63, which is good practice when dealing with reserved or ignored
> bits.
>
> Fixes: e15a4fea4d ("powerpc/64s/hash: Add some SLB debugging tests")
> Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
> Tested-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
> Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
> Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Applied to powerpc next, thanks.
https://git.kernel.org/powerpc/c/7104dccfd052fde51eecc9972dad9c40
cheers
prev parent reply other threads:[~2019-02-22 10:30 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-15 10:20 [PATCH] powerpc/64s/hash: Fix assert_slb_presence() use of the slbfee. instruction Nicholas Piggin
2019-02-15 10:27 ` Aneesh Kumar K.V
2019-02-22 9:48 ` Michael Ellerman [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=445RNK2klNz9sB3@ozlabs.org \
--to=patch-notifications@ellerman.id.au \
--cc=aneesh.kumar@linux.ibm.com \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=npiggin@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.