From: Julien Grall <julien.grall@arm.com>
To: Juergen Gross <jgross@suse.com>, xen-devel@lists.xen.org
Cc: sstabellini@kernel.org, wei.liu2@citrix.com,
Wei Chen <Wei.Chen@arm.com>,
George.Dunlap@eu.citrix.com, andrew.cooper3@citrix.com,
Steve Capper <Steve.Capper@arm.com>,
ian.jackson@eu.citrix.com, tim@xen.org, jbeulich@suse.com
Subject: Re: [PATCH 0/2] Support consistent reads of mapped vcpu_runstate_info
Date: Fri, 20 May 2016 15:10:31 +0100 [thread overview]
Message-ID: <573F1AD7.8040103@arm.com> (raw)
In-Reply-To: <1463750562-20549-1-git-send-email-jgross@suse.com>
Hi Juergen,
On 20/05/16 14:22, Juergen Gross wrote:
> A guest mapping vcpu_runstate_info into its memory can't read this
> information from another cpu but the one the data is referring to.
> Reason is there is no reliable way for the guest to detect a concurrent
> data update by the hypervisor.
>
> This patch series adds an update flag to the mapped data which can be
> used by the guest to detect an update is occurring. As this flag is
> modifying the current interface it has to be activated by using a
> vm_assist hypercall, which in turn has to be made available for ARM.
>
> Runtime tested on x86 with a modified Linux kernel using the new
> feature.
> Compile tested only for ARM.
I would like to give a go on ARM. Who it be possible to provide the
patch for Linux and how to test it?
Regards,
--
Julien Grall
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next prev parent reply other threads:[~2016-05-20 14:10 UTC|newest]
Thread overview: 24+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-05-20 13:22 [PATCH 0/2] Support consistent reads of mapped vcpu_runstate_info Juergen Gross
2016-05-20 13:22 ` [PATCH 1/2] xen/arm: add support for vm_assist hypercall Juergen Gross
2016-05-20 13:58 ` Julien Grall
2016-05-20 14:34 ` Jan Beulich
[not found] ` <573F3C9702000078000ED477@suse.com>
2016-05-20 14:42 ` Juergen Gross
2016-05-20 14:51 ` Jan Beulich
[not found] ` <573F409702000078000ED4C9@suse.com>
2016-05-20 15:08 ` Juergen Gross
2016-05-20 15:33 ` Jan Beulich
[not found] ` <573F4A7302000078000ED510@suse.com>
2016-05-20 16:02 ` Juergen Gross
2016-05-21 13:27 ` Stefano Stabellini
2016-05-21 13:59 ` Julien Grall
2016-05-21 14:03 ` Stefano Stabellini
2016-05-20 13:22 ` [PATCH 2/2] xen: add update indicator to vcpu_runstate_info Juergen Gross
2016-05-20 13:34 ` Andrew Cooper
2016-05-20 13:38 ` Juergen Gross
2016-05-20 14:49 ` Jan Beulich
[not found] ` <573F402602000078000ED4AD@suse.com>
2016-05-20 15:04 ` Juergen Gross
2016-05-20 15:36 ` Jan Beulich
[not found] ` <573F4B2F02000078000ED513@suse.com>
2016-05-20 15:54 ` Juergen Gross
2016-05-20 16:16 ` Jan Beulich
2016-05-21 14:00 ` Stefano Stabellini
[not found] ` <573F549602000078000ED57C@suse.com>
2016-05-21 4:50 ` Juergen Gross
2016-05-20 14:10 ` Julien Grall [this message]
2016-05-20 14:19 ` [PATCH 0/2] Support consistent reads of mapped vcpu_runstate_info Juergen Gross
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