From: Ralf Baechle <ralf@linux-mips.org>
To: Sebastian Andrzej Siewior <sebastian@breakpoint.cc>
Cc: linux-mips@linux-mips.org
Subject: Re: [PATCH] mips/mm: fix module support on SiByte
Date: Mon, 22 Mar 2010 19:09:15 +0100 [thread overview]
Message-ID: <20100322180915.GS4554@linux-mips.org> (raw)
In-Reply-To: <20100322145918.GR4554@linux-mips.org>
On Mon, Mar 22, 2010 at 03:59:18PM +0100, Ralf Baechle wrote:
> > Since commit 656be92f aka "Load modules to CKSEG0 if
> > CONFIG_BUILD_ELF64=n" module support is broken on 64bit. Since then
> > modules arr loaded into 32bit compat adresses which are sign extended
> > 64bit addresses. The SiByte war handler was not updated and those
> > addresses were not recognized by the TLB hadling.
> > This patch fixes this by shifting away the upper bits including the R
> > and Fill bits. Now we compare VPN2 of C0_ENTRYHI against the matching
> > bits at C0_BADVADDR.
>
> Good detective work but I'll check against the errata documents (which
> are non-public, sigh ...) before applying your patch.
The patch is wrong; it doesn't compare the region bits.
Ralf
next prev parent reply other threads:[~2010-03-22 18:09 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-03-21 11:02 [PATCH] mips/mm: fix module support on SiByte Sebastian Andrzej Siewior
2010-03-22 14:59 ` Ralf Baechle
2010-03-22 18:09 ` Ralf Baechle [this message]
2010-03-23 1:04 ` Ralf Baechle
2010-03-23 23:31 ` Ralf Baechle
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