From: Michael Ellerman <mpe@ellerman.id.au>
To: Ian Munsie <imunsie@au1.ibm.com>
Cc: cbe-oss-dev <cbe-oss-dev@lists.ozlabs.org>,
Philippe Bergheaud <philippe.bergheaud@fr.ibm.com>,
mikey <mikey@neuling.org>,
"Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>,
linux-kernel <linux-kernel@vger.kernel.org>,
linuxppc-dev <linuxppc-dev@ozlabs.org>, anton <anton@samba.org>,
jk <jk@ozlabs.org>
Subject: Re: [PATCH 7/7] CXL: Unmap MMIO regions when detaching a context
Date: Tue, 16 Dec 2014 10:32:03 +1100 [thread overview]
Message-ID: <1418686323.3241.1.camel@ellerman.id.au> (raw)
In-Reply-To: <1418613792-sup-5165@delenn.ozlabs.ibm.com>
On Mon, 2014-12-15 at 14:32 +1100, Ian Munsie wrote:
> Excerpts from Ian Munsie's message of 2014-12-08 19:18:01 +1100:
> > From: Ian Munsie <imunsie@au1.ibm.com>
> >
> > If we need to force detach a context (e.g. due to EEH or simply force
> > unbinding the driver) we should prevent the userspace contexts from
> > being able to access the Problem State Area MMIO region further, which
> > they may have mapped with mmap().
> >
> > This patch unmaps any mapped MMIO regions when detaching a userspace
> > context.
>
> Might want to drop this one for now - Philippe found that it sometimes
> causes an issue when multiple contexts are using the afu. Seems that
> unmap_mapping_range() unmapped a bit more than I expected.
Sorry, it's already in next.
https://git.kernel.org/cgit/linux/kernel/git/mpe/linux.git/commit/?h=next&id=b123429e6a9e8d03aacf888d23262835f0081448
Send me a revert or a fixup.
cheers
next prev parent reply other threads:[~2014-12-15 23:32 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-08 8:17 [PATCH 1/7] CXL: Change contexts_lock to a mutex to fix sleep while atomic bug Ian Munsie
2014-12-08 8:17 ` [PATCH 2/7] CXL: Add timeout to process element commands Ian Munsie
2014-12-09 5:31 ` Ian Munsie
2014-12-08 8:17 ` [PATCH 3/7] CXL: Fix leaking interrupts if attach process fails Ian Munsie
2014-12-09 5:34 ` Ian Munsie
2014-12-08 8:17 ` [PATCH 4/7] CXL: Early return from cxl_handle_fault for a shut down context Ian Munsie
2014-12-08 8:17 ` [PATCH 5/7] CXL: Disable AFU debug flag Ian Munsie
2014-12-09 5:39 ` Ian Munsie
2014-12-08 8:18 ` [PATCH 6/7] CXL: Disable SPAP register when freeing SPA Ian Munsie
2014-12-08 8:18 ` [PATCH 7/7] CXL: Unmap MMIO regions when detaching a context Ian Munsie
2014-12-09 5:41 ` Ian Munsie
2014-12-15 3:32 ` Ian Munsie
2014-12-15 23:32 ` Michael Ellerman [this message]
2014-12-09 5:30 ` [PATCH 1/7] CXL: Change contexts_lock to a mutex to fix sleep while atomic bug Ian Munsie
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