From: Ian Munsie <imunsie@au1.ibm.com>
To: mpe <mpe@ellerman.id.au>
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: Mon, 15 Dec 2014 14:32:18 +1100 [thread overview]
Message-ID: <1418613792-sup-5165@delenn.ozlabs.ibm.com> (raw)
In-Reply-To: <1418026681-14787-7-git-send-email-imunsie@au.ibm.com>
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.
Cheers,
-Ian
next prev parent reply other threads:[~2014-12-15 3:32 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 [this message]
2014-12-15 23:32 ` Michael Ellerman
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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