From: Wei Liu <wei.liu2@citrix.com>
To: Paul Durrant <paul.durrant@citrix.com>
Cc: Stefano Stabellini <sstabellini@kernel.org>,
Wei Liu <wei.liu2@citrix.com>,
George Dunlap <George.Dunlap@eu.citrix.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Ian Jackson <ian.jackson@eu.citrix.com>, Tim Deegan <tim@xen.org>,
Jan Beulich <jbeulich@suse.com>,
xen-devel@lists.xenproject.org
Subject: Re: [PATCH v5 11/12] x86/hvm/ioreq: defer mapping gfns until they are actually requsted
Date: Mon, 11 Sep 2017 14:07:27 +0100 [thread overview]
Message-ID: <20170911130727.ezzo5xtam4tibql5@citrix.com> (raw)
In-Reply-To: <20170908152137.22808-12-paul.durrant@citrix.com>
On Fri, Sep 08, 2017 at 04:21:36PM +0100, Paul Durrant wrote:
> A subsequent patch will introduce a new scheme to allow an emulator to
> map ioreq server pages directly from Xen rather than the guest P2M.
>
> This patch lays the groundwork for that change by deferring mapping of
> gfns until their values are requested by an emulator. To that end, the
> pad field of the xen_dm_op_get_ioreq_server_info structure is re-purposed
> to a flags field and new flag, XEN_DMOP_no_gfns, defined which modifies the
> behaviour of XEN_DMOP_get_ioreq_server_info to allow the caller to avoid
> requesting the gfn values.
>
> Signed-off-by: Paul Durrant <paul.durrant@citrix.com>
> Reviewed-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
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next prev parent reply other threads:[~2017-09-11 13:08 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-08 15:21 [PATCH v5 00/12] x86: guest resource mapping Paul Durrant
2017-09-08 15:21 ` [PATCH v5 01/12] x86/mm: allow a privileged PV domain to map guest mfns Paul Durrant
2017-09-08 15:21 ` [PATCH v5 02/12] x86/mm: add HYPERVISOR_memory_op to acquire guest resources Paul Durrant
2017-09-08 15:21 ` [PATCH v5 03/12] tools/libxenforeignmemory: add support for resource mapping Paul Durrant
2017-09-08 15:21 ` [PATCH v5 04/12] tools/libxenforeignmemory: reduce xenforeignmemory_restrict code footprint Paul Durrant
2017-09-08 15:21 ` [PATCH v5 05/12] tools/libxenctrl: use new xenforeignmemory API to seed grant table Paul Durrant
2017-09-08 15:21 ` [PATCH v5 06/12] x86/hvm/ioreq: rename .*pfn and .*gmfn to .*gfn Paul Durrant
2017-09-08 15:21 ` [PATCH v5 07/12] x86/hvm/ioreq: use bool rather than bool_t Paul Durrant
2017-09-08 15:21 ` [PATCH v5 08/12] x86/hvm/ioreq: maintain an array of ioreq servers rather than a list Paul Durrant
2017-09-08 15:21 ` [PATCH v5 09/12] x86/hvm/ioreq: simplify code and use consistent naming Paul Durrant
2017-09-08 15:21 ` [PATCH v5 10/12] x86/hvm/ioreq: use gfn_t in struct hvm_ioreq_page Paul Durrant
2017-09-08 15:21 ` [PATCH v5 11/12] x86/hvm/ioreq: defer mapping gfns until they are actually requsted Paul Durrant
2017-09-11 13:07 ` Wei Liu [this message]
2017-09-08 15:21 ` [PATCH v5 12/12] x86/hvm/ioreq: add a new mappable resource type Paul Durrant
2017-09-11 13:16 ` Wei Liu
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