From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: wei.liu2@citrix.com, andrew.cooper3@citrix.com,
ian.jackson@eu.citrix.com, xen-devel@lists.xen.org,
Daniel De Graaf <dgdegra@tycho.nsa.gov>,
roger.pau@citrix.com
Subject: Re: [PATCH v3 01/11] x86/domctl: Add XEN_DOMCTL_set_avail_vcpus
Date: Tue, 22 Nov 2016 07:34:06 -0500 [thread overview]
Message-ID: <cc50d66e-94f6-d60a-2439-7db8261a8e0f@oracle.com> (raw)
In-Reply-To: <58342E7E0200007800120978@prv-mh.provo.novell.com>
On 11/22/2016 05:39 AM, Jan Beulich wrote:
>>>> On 22.11.16 at 11:31, <JBeulich@suse.com> wrote:
>>>>> On 21.11.16 at 22:00, <boris.ostrovsky@oracle.com> wrote:
>>> This domctl is called when a VCPU is hot-(un)plugged to a guest (via
>>> 'xl vcpu-set').
>>>
>>> The primary reason for adding this call is because for PVH guests
>>> the hypervisor needs to send an SCI and set GPE registers. This is
>>> unlike HVM guests that have qemu to perform these tasks.
>>
>> And the tool stack can't do this?
>
> For the avoidance of further misunderstandings: Of course likely
> not completely on its own, but by using a (to be introduced) more
> low level hypervisor interface (setting arbitrary GPE bits, with SCI
> raised as needed, or the SCI raising being another hypercall).
So you are suggesting breaking up XEN_DOMCTL_set_avail_vcpus into
XEN_DOMCTL_set_acpi_reg(io_offset, length, val)
XEN_DOMCTL_set_avail_vcpus(avail_vcpus_bitmap)
XEN_DOMCTL_send_virq(virq)
(with perhaps set_avail_vcpus folded into set_acpi_reg) ?
-boris
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next prev parent reply other threads:[~2016-11-22 12:34 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-11-21 21:00 [PATCH v3 00/11] PVH VCPU hotplug support Boris Ostrovsky
2016-11-21 21:00 ` [PATCH v3 01/11] x86/domctl: Add XEN_DOMCTL_set_avail_vcpus Boris Ostrovsky
2016-11-22 10:31 ` Jan Beulich
2016-11-22 10:39 ` Jan Beulich
2016-11-22 12:34 ` Boris Ostrovsky [this message]
2016-11-22 13:59 ` Jan Beulich
2016-11-22 14:37 ` Boris Ostrovsky
2016-11-22 15:07 ` Jan Beulich
2016-11-22 15:43 ` Boris Ostrovsky
2016-11-22 16:01 ` Jan Beulich
[not found] ` <a4ac4c28-833b-df5f-ce34-1fa72f7c4cd2@oracle.com>
2016-11-22 23:47 ` Boris Ostrovsky
2016-11-23 8:09 ` Jan Beulich
2016-11-23 13:33 ` Boris Ostrovsky
2016-11-23 13:58 ` Jan Beulich
2016-11-23 14:16 ` Boris Ostrovsky
2016-11-25 18:16 ` Boris Ostrovsky
2016-11-28 7:59 ` Jan Beulich
2016-11-22 12:19 ` Boris Ostrovsky
2016-11-21 21:00 ` [PATCH v3 02/11] acpi: Define ACPI IO registers for PVH guests Boris Ostrovsky
2016-11-22 10:37 ` Jan Beulich
2016-11-22 12:28 ` Boris Ostrovsky
2016-11-22 14:07 ` Jan Beulich
2016-11-22 14:53 ` Boris Ostrovsky
2016-11-22 15:13 ` Jan Beulich
2016-11-22 15:52 ` Boris Ostrovsky
2016-11-22 16:02 ` Jan Beulich
2016-11-21 21:00 ` [PATCH v3 03/11] pvh: Set online VCPU map to avail_vcpus Boris Ostrovsky
2016-11-21 21:00 ` [PATCH v3 04/11] acpi: Make pmtimer optional in FADT Boris Ostrovsky
2016-11-21 21:00 ` [PATCH v3 05/11] acpi: Power and Sleep ACPI buttons are not emulated for PVH guests Boris Ostrovsky
2016-11-21 21:00 ` [PATCH v3 06/11] acpi: PVH guests need _E02 method Boris Ostrovsky
2016-11-22 9:13 ` Jan Beulich
2016-11-22 20:20 ` Konrad Rzeszutek Wilk
2016-11-21 21:00 ` [PATCH v3 07/11] pvh/ioreq: Install handlers for ACPI-related PVH IO accesses Boris Ostrovsky
2016-11-22 11:34 ` Jan Beulich
2016-11-22 12:38 ` Boris Ostrovsky
2016-11-22 14:08 ` Jan Beulich
2016-11-28 15:16 ` Boris Ostrovsky
2016-11-28 15:48 ` Roger Pau Monné
2016-11-21 21:00 ` [PATCH v3 08/11] pvh/acpi: Handle ACPI accesses for PVH guests Boris Ostrovsky
2016-11-22 14:11 ` Paul Durrant
2016-11-22 15:01 ` Jan Beulich
2016-11-22 15:30 ` Boris Ostrovsky
2016-11-22 16:05 ` Jan Beulich
2016-11-22 16:33 ` Boris Ostrovsky
2016-11-21 21:00 ` [PATCH v3 09/11] events/x86: Define SCI virtual interrupt Boris Ostrovsky
2016-11-22 15:25 ` Jan Beulich
2016-11-22 15:57 ` Boris Ostrovsky
2016-11-22 16:07 ` Jan Beulich
2016-11-21 21:00 ` [PATCH v3 10/11] pvh: Send an SCI on VCPU hotplug event Boris Ostrovsky
2016-11-22 15:32 ` Jan Beulich
2016-11-21 21:00 ` [PATCH v3 11/11] docs: Describe PVHv2's VCPU hotplug procedure Boris Ostrovsky
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