Neo Jia
2008-Oct-01 07:03 UTC
[Xen-devel] Will Xen change the mapping after PCIe reset for the VT-d device?
hi, After a secondary bus reset Xen will restore the PCI configure space for the VT-d device, will the mapping still valid as we are using the original BARs? Let''s assume the guest device driver will not change the BARs as Xen only save the register after guest shutdown/reset. Thanks, Neo -- I would remember that if researchers were not ambitious probably today we haven''t the technology we are using! _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
pradeep singh rautela
2008-Oct-01 07:53 UTC
Re: [Xen-devel] Will Xen change the mapping after PCIe reset for the VT-d device?
On Wed, Oct 1, 2008 at 12:33 PM, Neo Jia <neojia@gmail.com> wrote:> hi, > > After a secondary bus reset Xen will restore the PCI configure space > for the VT-d device, will the mapping still valid as we are using the > original BARs? > > Let''s assume the guest device driver will not change the BARs as Xen > only save the register after guest shutdown/reset.Won''t SR(MR) PCI Manager take care of this? ( provided it sits in the Xen hypervisor) Thanks, --Pradeep> > Thanks, > Neo > -- > I would remember that if researchers were not ambitious > probably today we haven''t the technology we are using! > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel >-- Pradeep Singh Rautela http://eagain.wordpress.com http://emptydomain.googlepages.com _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Neo Jia
2008-Oct-01 17:22 UTC
Re: [Xen-devel] Will Xen change the mapping after PCIe reset for the VT-d device?
Could you show me where the PCI manager in the Xen hypervisor? Thanks, Neo On Wed, Oct 1, 2008 at 12:53 AM, pradeep singh rautela <rautelap@gmail.com> wrote:> On Wed, Oct 1, 2008 at 12:33 PM, Neo Jia <neojia@gmail.com> wrote: >> hi, >> >> After a secondary bus reset Xen will restore the PCI configure space >> for the VT-d device, will the mapping still valid as we are using the >> original BARs? >> >> Let''s assume the guest device driver will not change the BARs as Xen >> only save the register after guest shutdown/reset. > > Won''t SR(MR) PCI Manager take care of this? ( provided it sits in the > Xen hypervisor) > > Thanks, > --Pradeep >> >> Thanks, >> Neo >> -- >> I would remember that if researchers were not ambitious >> probably today we haven''t the technology we are using! >> >> _______________________________________________ >> Xen-devel mailing list >> Xen-devel@lists.xensource.com >> http://lists.xensource.com/xen-devel >> > > > > -- > Pradeep Singh Rautela > http://eagain.wordpress.com > http://emptydomain.googlepages.com >-- I would remember that if researchers were not ambitious probably today we haven''t the technology we are using! _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
pradeep singh rautela
2008-Oct-06 07:08 UTC
Re: [Xen-devel] Will Xen change the mapping after PCIe reset for the VT-d device?
On Wed, Oct 1, 2008 at 10:52 PM, Neo Jia <neojia@gmail.com> wrote:> Could you show me where the PCI manager in the Xen hypervisor?I do not know but I doubt if it is in there yet. Maybe someone better can ans this question. What I said was from simple SR-IOV specification. Thanks,> > Thanks, > Neo > > On Wed, Oct 1, 2008 at 12:53 AM, pradeep singh rautela > <rautelap@gmail.com> wrote: >> On Wed, Oct 1, 2008 at 12:33 PM, Neo Jia <neojia@gmail.com> wrote: >>> hi, >>> >>> After a secondary bus reset Xen will restore the PCI configure space >>> for the VT-d device, will the mapping still valid as we are using the >>> original BARs? >>> >>> Let''s assume the guest device driver will not change the BARs as Xen >>> only save the register after guest shutdown/reset. >> >> Won''t SR(MR) PCI Manager take care of this? ( provided it sits in the >> Xen hypervisor) >> >> Thanks, >> --Pradeep >>> >>> Thanks, >>> Neo >>> -- >>> I would remember that if researchers were not ambitious >>> probably today we haven''t the technology we are using! >>> >>> _______________________________________________ >>> Xen-devel mailing list >>> Xen-devel@lists.xensource.com >>> http://lists.xensource.com/xen-devel >>> >> >> >> >> -- >> Pradeep Singh Rautela >> http://eagain.wordpress.com >> http://emptydomain.googlepages.com >> > > > > -- > I would remember that if researchers were not ambitious > probably today we haven''t the technology we are using! >-- Pradeep Singh Rautela http://eagain.wordpress.com http://emptydomain.googlepages.com _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel
Tej
2008-Oct-06 14:08 UTC
Re: [Xen-devel] Will Xen change the mapping after PCIe reset for the VT-d device?
On 10/6/08, pradeep singh rautela <rautelap@gmail.com> wrote:> On Wed, Oct 1, 2008 at 10:52 PM, Neo Jia <neojia@gmail.com> wrote: >> Could you show me where the PCI manager in the Xen hypervisor? > > I do not know but I doubt if it is in there yet. > Maybe someone better can ans this question. > What I said was from simple SR-IOV specification.SR-IOV implementation is out there, PCIM has to be driver specific rather a generic implementation in Hypervisor. http://lkml.org/lkml/2008/9/1/99. Now Code bases says that use the functionality in driver to enable IOV configuration space.> > Thanks, > >> >> Thanks, >> Neo >> >> On Wed, Oct 1, 2008 at 12:53 AM, pradeep singh rautela >> <rautelap@gmail.com> wrote: >>> On Wed, Oct 1, 2008 at 12:33 PM, Neo Jia <neojia@gmail.com> wrote: >>>> hi, >>>> >>>> After a secondary bus reset Xen will restore the PCI configure space >>>> for the VT-d device, will the mapping still valid as we are using the >>>> original BARs? >>>> >>>> Let''s assume the guest device driver will not change the BARs as Xen >>>> only save the register after guest shutdown/reset. >>> >>> Won''t SR(MR) PCI Manager take care of this? ( provided it sits in the >>> Xen hypervisor) >>> >>> Thanks, >>> --Pradeep >>>> >>>> Thanks, >>>> Neo >>>> -- >>>> I would remember that if researchers were not ambitious >>>> probably today we haven''t the technology we are using! >>>> >>>> _______________________________________________ >>>> Xen-devel mailing list >>>> Xen-devel@lists.xensource.com >>>> http://lists.xensource.com/xen-devel >>>> >>> >>> >>> >>> -- >>> Pradeep Singh Rautela >>> http://eagain.wordpress.com >>> http://emptydomain.googlepages.com >>> >> >> >> >> -- >> I would remember that if researchers were not ambitious >> probably today we haven''t the technology we are using! >> > > > > -- > Pradeep Singh Rautela > http://eagain.wordpress.com > http://emptydomain.googlepages.com > > _______________________________________________ > Xen-devel mailing list > Xen-devel@lists.xensource.com > http://lists.xensource.com/xen-devel >_______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel