From: Julien Grall <julien@xen.org>
To: Andrew Cooper <andrew.cooper3@citrix.com>,
paul@xen.org, 'Xen-devel' <xen-devel@lists.xenproject.org>
Cc: "'Stefano Stabellini'" <sstabellini@kernel.org>,
"'Hubert Jasudowicz'" <hubert.jasudowicz@cert.pl>,
"'Wei Liu'" <wl@xen.org>,
"'Konrad Rzeszutek Wilk'" <konrad.wilk@oracle.com>,
"'George Dunlap'" <George.Dunlap@eu.citrix.com>,
"'Michał Leszczyński'" <michal.leszczynski@cert.pl>,
"'Jan Beulich'" <JBeulich@suse.com>,
"'Ian Jackson'" <ian.jackson@citrix.com>
Subject: Re: [PATCH 4/5] xen/memory: Fix acquire_resource size semantics
Date: Thu, 30 Jul 2020 21:00:40 +0100 [thread overview]
Message-ID: <5c7d67c3-4731-caf0-cbe5-3849cd07bf98@xen.org> (raw)
In-Reply-To: <474ff131-83d8-deff-4e3a-32392ea092b3@citrix.com>
Hi Andrew,
On 30/07/2020 20:46, Andrew Cooper wrote:
> On 30/07/2020 09:31, Paul Durrant wrote:
> In between these two hypercalls from the utility, the guest can do a
> v1=>v2 or v2=>v1 switch and make the resource spontaneously appear or
> disappear.
This can only happen on platform where grant-table v2 is enabled. Where
this is not enabled (e.g Arm), then I think we want to return 0 as there
is nothing to map.
Cheers,
--
Julien Grall
next prev parent reply other threads:[~2020-07-30 20:01 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-28 11:37 [PATCH 0/5] Multiple fixes to XENMEM_acquire_resource Andrew Cooper
2020-07-28 11:37 ` [PATCH 1/5] xen/memory: Introduce CONFIG_ARCH_ACQUIRE_RESOURCE Andrew Cooper
2020-07-29 19:41 ` Jan Beulich
2020-07-30 8:02 ` Paul Durrant
2020-07-30 17:34 ` Andrew Cooper
2020-07-30 18:24 ` Paul Durrant
2020-07-30 9:50 ` Julien Grall
2020-07-30 17:28 ` Andrew Cooper
2020-07-30 18:30 ` Julien Grall
2020-07-28 11:37 ` [PATCH 2/5] xen/gnttab: Rework resource acquisition Andrew Cooper
2020-07-28 14:11 ` Andrew Cooper
2020-07-29 20:02 ` Jan Beulich
2020-09-22 13:10 ` Andrew Cooper
2020-09-22 13:34 ` Jan Beulich
2020-09-22 14:50 ` Andrew Cooper
2020-09-22 16:01 ` Jan Beulich
2020-07-30 8:14 ` Paul Durrant
2020-09-22 13:13 ` Andrew Cooper
2020-07-30 10:56 ` Julien Grall
2020-07-28 11:37 ` [PATCH 3/5] xen/memory: Fix compat XENMEM_acquire_resource for size requests Andrew Cooper
2020-07-29 20:09 ` Jan Beulich
2020-07-30 19:12 ` Andrew Cooper
2020-07-31 7:52 ` Jan Beulich
2020-07-30 8:19 ` Paul Durrant
2020-07-28 11:37 ` [PATCH 4/5] xen/memory: Fix acquire_resource size semantics Andrew Cooper
2020-07-30 8:31 ` Paul Durrant
2020-07-30 12:54 ` Julien Grall
2020-07-30 19:53 ` Andrew Cooper
2020-07-30 19:46 ` Andrew Cooper
2020-07-30 20:00 ` Julien Grall [this message]
2020-07-31 14:31 ` Jan Beulich
2020-07-31 14:44 ` Jan Beulich
2020-07-31 14:53 ` Andrew Cooper
2020-07-28 11:37 ` [PATCH 5/5] tools/foreignmem: Support querying the size of a resource Andrew Cooper
2020-07-28 14:14 ` Andrew Cooper
2020-08-04 14:29 ` Wei Liu
2020-07-30 8:39 ` Paul Durrant
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