From: Ian Campbell <ian.campbell@citrix.com>
To: Arianna Avanzini <avanzini.arianna@gmail.com>
Cc: Ian.Campbell@eu.citrix.com, paolo.valente@unimore.it,
keir@xen.org, stefano.stabellini@eu.citrix.com,
Ian.Jackson@eu.citrix.com, dario.faggioli@citrix.com,
tim@xen.org, xen-devel@lists.xen.org, julien.grall@citrix.com,
etrudeau@broadcom.com, JBeulich@suse.com,
andrew.cooper3@citrix.com, viktor.kleinik@globallogic.com
Subject: Re: [PATCH v8 06/14] arch/x86: warn if to-be-removed mapping does not exist
Date: Thu, 5 Jun 2014 15:06:37 +0100 [thread overview]
Message-ID: <1401977197.15729.102.camel@hastur.hellion.org.uk> (raw)
In-Reply-To: <1401015115-7610-7-git-send-email-avanzini.arianna@gmail.com>
On Sun, 2014-05-25 at 12:51 +0200, Arianna Avanzini wrote:
> Currently, when a memory mapping is removed with the memory_mapping
> DOMCTL, no check is performed on the existence of such a mapping.
> This commit adds such a consistency check to the code performing the
> unmap, emitting a warning message if the check fails.
This is only a warning on x86 but is a fatal error on ARM (from patch #2
of this series). Is this discrepancy deliberate?
I think the ARM behaviour is more correct but I appreciate that it might
be more difficult to switch x86 to that model right away, hence a
warning might consider be more appropriate (for now at least). Is that
the answer to my question?
Ian.
next prev parent reply other threads:[~2014-06-05 14:06 UTC|newest]
Thread overview: 50+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-25 10:51 [PATCH v8 00/14] Implement the XEN_DOMCTL_memory_mapping hypercall for ARM Arianna Avanzini
2014-05-25 10:51 ` [PATCH v8 01/14] arch/arm: domain build: let dom0 access I/O memory of mapped devices Arianna Avanzini
2014-06-10 15:04 ` Ian Campbell
2014-05-25 10:51 ` [PATCH v8 02/14] arch/arm: add consistency check to REMOVE p2m changes Arianna Avanzini
2014-05-25 15:50 ` Julien Grall
2014-06-05 13:45 ` Ian Campbell
2014-06-05 13:50 ` Ian Campbell
2014-05-25 10:51 ` [PATCH v8 03/14] arch/arm: let map_mmio_regions() take pfn as parameters Arianna Avanzini
2014-05-25 10:51 ` [PATCH v8 04/14] arch/arm: let map_mmio_regions() use start and count Arianna Avanzini
2014-05-25 15:56 ` Julien Grall
2014-06-05 13:53 ` Ian Campbell
2014-05-25 10:51 ` [PATCH v8 05/14] arch/arm: unmap partially-mapped I/O-memory regions Arianna Avanzini
2014-05-25 16:04 ` Julien Grall
2014-06-05 14:03 ` Ian Campbell
2014-06-05 14:09 ` Julien Grall
2014-05-25 10:51 ` [PATCH v8 06/14] arch/x86: warn if to-be-removed mapping does not exist Arianna Avanzini
2014-06-05 14:06 ` Ian Campbell [this message]
2014-05-25 10:51 ` [PATCH v8 07/14] arch/x86: cleanup memory_mapping DOMCTL Arianna Avanzini
2014-05-26 9:57 ` Jan Beulich
2014-05-25 10:51 ` [PATCH v8 08/14] xen/common: move memory_type_changed() function to common code Arianna Avanzini
2014-05-25 16:15 ` Julien Grall
2014-05-26 9:58 ` Jan Beulich
2014-06-05 14:08 ` Ian Campbell
2014-05-25 10:51 ` [PATCH v8 09/14] xen/x86: factor out map and unmap from the memory_mapping DOMCTL Arianna Avanzini
2014-05-26 10:04 ` Jan Beulich
2014-05-25 10:51 ` [PATCH v8 10/14] xen/common: move the memory_mapping DOMCTL hypercall to common code Arianna Avanzini
2014-05-25 16:42 ` Julien Grall
2014-05-26 10:07 ` Jan Beulich
2014-05-26 11:03 ` Julien Grall
2014-06-05 14:21 ` Ian Campbell
2014-06-05 14:33 ` Tim Deegan
2014-06-05 14:39 ` Ian Campbell
2014-05-26 10:06 ` Jan Beulich
2014-05-25 10:51 ` [PATCH v8 11/14] tools/libxl: parse optional start gfn from the iomem config option Arianna Avanzini
2014-05-25 10:51 ` [PATCH v8 12/14] tools/libxl: handle the iomem parameter with the memory_mapping hcall Arianna Avanzini
2014-05-25 17:04 ` Julien Grall
2014-06-05 14:27 ` Ian Campbell
2014-05-25 10:51 ` [PATCH v8 13/14] tools/libxl: explicitly grant access to needed I/O-memory ranges Arianna Avanzini
2014-05-25 17:08 ` Julien Grall
2014-05-26 10:11 ` Jan Beulich
2014-05-26 10:58 ` Julien Grall
2014-05-26 11:15 ` Jan Beulich
2014-06-05 14:31 ` Ian Campbell
2014-06-05 14:37 ` Ian Campbell
2014-06-05 14:54 ` Jan Beulich
2014-06-05 14:53 ` Jan Beulich
2014-05-26 10:10 ` Jan Beulich
2014-05-25 10:51 ` [PATCH v8 14/14] xen/common: do not implicitly permit access to mapped I/O memory Arianna Avanzini
2014-07-01 10:45 ` [PATCH v8 00/14] Implement the XEN_DOMCTL_memory_mapping hypercall for ARM Julien Grall
2014-07-01 10:55 ` Arianna Avanzini
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