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Message-Id: <1418613792-sup-5165@delenn.ozlabs.ibm.com> Date: Mon, 15 Dec 2014 14:32:18 +1100 From: Ian Munsie <imunsie@....ibm.com> To: mpe <mpe@...erman.id.au> Cc: benh <benh@...nel.crashing.org>, mikey <mikey@...ling.org>, anton <anton@...ba.org>, linux-kernel <linux-kernel@...r.kernel.org>, linuxppc-dev <linuxppc-dev@...abs.org>, jk <jk@...abs.org>, cbe-oss-dev <cbe-oss-dev@...ts.ozlabs.org>, "Aneesh Kumar K.V" <aneesh.kumar@...ux.vnet.ibm.com>, Philippe Bergheaud <philippe.bergheaud@...ibm.com> Subject: Re: [PATCH 7/7] CXL: Unmap MMIO regions when detaching a context Excerpts from Ian Munsie's message of 2014-12-08 19:18:01 +1100: > From: Ian Munsie <imunsie@....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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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