From: "Roger Pau Monné" <roger.pau@citrix.com>
To: Jan Beulich <JBeulich@suse.com>
Cc: xen-devel <xen-devel@lists.xenproject.org>,
Kevin Tian <kevin.tian@intel.com>,
Eddie Dong <eddie.dong@intel.com>,
Jun Nakajima <jun.nakajima@intel.com>
Subject: Re: [PATCH v2] VMX: don't allow PVH to reach handle_mmio()
Date: Tue, 9 Dec 2014 18:49:57 +0100 [thread overview]
Message-ID: <54873645.9070204@citrix.com> (raw)
In-Reply-To: <54873D3D020000780004E3D4@mail.emea.novell.com>
El 09/12/14 a les 18.19, Jan Beulich ha escrit:
>>>> On 09.12.14 at 18:01, <roger.pau@citrix.com> wrote:
>> For 4.6 I think we need to start using a different hvm_io_bitmap for PVH
>> Dom0 that allows direct access to the IO ports, bypassing the vmexit and
>> simplifying the code in Xen (this would also fix INS/OUTS). Still not
>> sure what should be done for PVH DomUs, specially when PVH gains support
>> for pci-passthrough.
>
> With the difficulty being that for PV the hypervisor intentionally
> intercepts accesses to some of the ports, so we can't blindly
> allow PVH access to all the ports its allowed access to.
I assume this is mainly for DomUs but not for Dom0? Or should PVH Dom0
access to the IO space also be filtered and emulated for some ports?
Roger.
next prev parent reply other threads:[~2014-12-09 17:50 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-12-08 9:12 [PATCH v2] VMX: don't allow PVH to reach handle_mmio() Jan Beulich
2014-12-08 22:12 ` Mukesh Rathor
2014-12-09 17:01 ` Roger Pau Monné
2014-12-09 17:19 ` Jan Beulich
2014-12-09 17:49 ` Roger Pau Monné [this message]
2014-12-10 9:07 ` Jan Beulich
2014-12-10 17:08 ` Konrad Rzeszutek Wilk
2014-12-10 5:07 ` Tian, Kevin
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