From: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
To: "Roger Pau Monné" <roger.pau@citrix.com>
Cc: Kevin Tian <kevin.tian@intel.com>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
Jun Nakajima <jun.nakajima@intel.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Eddie Dong <eddie.dong@intel.com>,
Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com>,
Jan Beulich <jbeulich@suse.com>,
xen-devel@lists.xenproject.org,
Boris Ostrovsky <boris.ostrovsky@oracle.com>
Subject: Re: [PATCH v2 11/22] xen/x86: allow disabling emulated devices for HVM guests
Date: Fri, 10 Jul 2015 14:54:11 -0400 [thread overview]
Message-ID: <20150710185411.GC30788@l.oracle.com> (raw)
In-Reply-To: <5594FEFD.2090603@citrix.com>
> Also, from a guest POV, how is the hw emulated local apic going to be
> used? Are we going to route the interrupts from virtual devices
> (netfront, blkfront) to the lapic? Or we just want it for the timer and
> ditch the PV timer?
Use the event channels for the PV. For PCIe devices (passthrough)
use the APIC.
>
> I can see that this is more interesting for a PVH/HVMlite Dom0, but
> still in that case I'm not sure how a guest is supposed to interact with
> it. Will the PHYSDEV hypercalls route interrupts to the emulated local
> apic instead of pirqs event channels? Will we trap PCI/MSI/MSI-X
> configuration and emulate it?
The thought I had was that with VT-D posted interrupts would
do the heavy lifting. And when the interrupts do get to us and
have to vmexit - well we would do the normal HVM path for those
that are interested.
And for those that want the event callback vector - we can still
do that. I hadn't thought much of details on this yet -perhaps
this should be discussed next Developer summit to hash some of
this out.
next prev parent reply other threads:[~2015-07-10 18:54 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-07-01 14:45 [PATCH v2 00/22] Introduce HVM without dm and new boot ABI Roger Pau Monne
2015-07-01 14:45 ` [PATCH v2 01/22] libxc: split x86 HVM setup_guest into smaller logical functions Roger Pau Monne
2015-07-01 14:45 ` [PATCH v2 02/22] libxc: unify xc_dom_p2m_{host/guest} Roger Pau Monne
2015-07-01 14:45 ` [PATCH v2 03/22] libxc: introduce the notion of a container type Roger Pau Monne
2015-07-01 14:45 ` [PATCH v2 04/22] libxc: introduce a domain loader for HVM guest firmware Roger Pau Monne
2015-07-01 14:45 ` [PATCH v2 05/22] libxc: make arch_setup_meminit a xc_dom_arch hook Roger Pau Monne
2015-07-01 14:45 ` [PATCH v2 06/22] libxc: make arch_setup_boot{init/late} xc_dom_arch hooks Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 07/22] xen/x86: fix arch_set_info_guest for HVM guests Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 08/22] libxc: introduce a xc_dom_arch for hvm-3.0-x86_32 guests Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 09/22] libxl: switch HVM domain building to use xc_dom_* helpers Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 10/22] libxc: remove dead HVM building code Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 11/22] xen/x86: allow disabling emulated devices for HVM guests Roger Pau Monne
2015-07-01 15:25 ` Paul Durrant
2015-07-01 15:34 ` Roger Pau Monné
2015-07-01 15:39 ` Paul Durrant
2015-07-01 15:46 ` Andrew Cooper
2015-07-01 15:51 ` Boris Ostrovsky
2015-07-01 16:01 ` Andrew Cooper
2015-07-01 16:13 ` Stefano Stabellini
2015-07-01 16:48 ` Andrew Cooper
2015-07-02 11:49 ` Stefano Stabellini
2015-07-02 13:34 ` Boris Ostrovsky
2015-07-02 9:06 ` Roger Pau Monné
2015-07-10 18:54 ` Konrad Rzeszutek Wilk [this message]
2015-07-01 14:46 ` [PATCH v2 12/22] elfnotes: intorduce a new PHYS_ENTRY elfnote Roger Pau Monne
2015-07-03 10:36 ` David Vrabel
2015-07-03 10:52 ` Roger Pau Monné
2015-07-01 14:46 ` [PATCH v2 13/22] lib{xc/xl}: allow creating domains without emulated devices Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 14/22] xen: allow HVM guests to use XENMEM_memory_map Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 15/22] xen/x86: allow HVM guests to use hypercalls to bring up vCPUs Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 16/22] xenconsole: try to attach to PV console if HVM fails Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 17/22] libxc: change the position of the special pages Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 18/22] libxc/xen: introduce HVM_PARAM_CMDLINE_PFN Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 19/22] libxc/xen: introduce HVM_PARAM_FIRST_FREE_PFN Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 20/22] libxc/xen: introduce HVM_PARAM_MODLIST_PFN Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 21/22] libxl: set correct nic type for HVM guests without a device model Roger Pau Monne
2015-07-01 14:46 ` [PATCH v2 22/22] lib{xc/xl}: allow the creation of HVM domains with a kernel Roger Pau Monne
2015-07-03 1:59 ` [PATCH v2 00/22] Introduce HVM without dm and new boot ABI Yang Hongyang
2015-07-03 7:02 ` Roger Pau Monné
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