>>> On 11.09.12 at 14:49, Fabio Fantoni <fantonifabio@tiscali.it> wrote: > I have Wheezy 64 bit dom0 with kernel 3.2 from repository and xen 4.2 > from source. > I want use UEFI without xen.efiWhy?> which fails on compiling xen.How? All you would need is xen.gz for that purpose (but of course that won''t have any EFI specific bits in it).> Should I use "ucode" or something similar?That''s completely unrelated.> Is possible? If is possible what I must do?Without you telling us precisely what doesn''t work, we can hardly answer that. Jan
>>> On 11.09.12 at 15:17, Fabio Fantoni <fantonifabio@tiscali.it> wrote: > xen.efi not compile when we build xen on Wheezy and probably is not > possible boot with lvm volume, fallback options ecc...Just get a suitable tool chain installed then.> UEFI with grub2 seem the best option but with xen hypervisor seem not > load efi variable.Sure, because only xen.efi has the code to deal with such. (Btw., I assume you aren''t aware that any boot manager whatsoever, other than the one coming with EFI, is sort of bogus under EFI?) Jan
On Tue, 11 Sep 2012, Jan Beulich wrote:> >>> On 11.09.12 at 15:17, Fabio Fantoni <fantonifabio@tiscali.it> wrote: > > xen.efi not compile when we build xen on Wheezy and probably is not > > possible boot with lvm volume, fallback options ecc... > > Just get a suitable tool chain installed then. > > > UEFI with grub2 seem the best option but with xen hypervisor seem not > > load efi variable. > > Sure, because only xen.efi has the code to deal with such. > > (Btw., I assume you aren''t aware that any boot manager > whatsoever, other than the one coming with EFI, is sort of > bogus under EFI?)Unfortunately it looks like more and more people are of the opinion that grub2 is useful even on UEFI firmware. For example, it is pretty clear that Ubuntu is still going to boot Xen via grub2 no matter how the firmware looks like. What would it take to make Xen work properly with grub2 on a UEFI firmware? I think that we should add it as a work item for Xen 4.3.
>>> Stefano Stabellini <stefano.stabellini@eu.citrix.com> 11/01/12 4:50 PM >>> >On Tue, 11 Sep 2012, Jan Beulich wrote: >> >>> On 11.09.12 at 15:17, Fabio Fantoni <fantonifabio@tiscali.it> wrote: >> > xen.efi not compile when we build xen on Wheezy and probably is not >> > possible boot with lvm volume, fallback options ecc... >> >> Just get a suitable tool chain installed then. >> >> > UEFI with grub2 seem the best option but with xen hypervisor seem not >> > load efi variable. >> >> Sure, because only xen.efi has the code to deal with such. >> >> (Btw., I assume you aren''t aware that any boot manager >> whatsoever, other than the one coming with EFI, is sort of >> bogus under EFI?) > >Unfortunately it looks like more and more people are of the opinion that >grub2 is useful even on UEFI firmware. >For example, it is pretty clear that Ubuntu is still going to boot Xen >via grub2 no matter how the firmware looks like.Then they need to be tought how to do it properly, the more that Linux itself now is capable of booting without a boot loader (other than the EFI one).>What would it take to make Xen work properly with grub2 on a UEFI firmware?I can''t be that difficult.>I think that we should add it as a work item for Xen 4.3.If you have someone to do that work. I''m willing to review the resulting changes, but I currently don''t see me doing anything here (as being totally unimportant and - just to repeat that - conceptually wrong). Jan
On Thu, Nov 01, 2012 at 07:57:30PM +0000, Jan Beulich wrote:> >>> Stefano Stabellini <stefano.stabellini@eu.citrix.com> 11/01/12 4:50 PM >>> > >On Tue, 11 Sep 2012, Jan Beulich wrote: > >> >>> On 11.09.12 at 15:17, Fabio Fantoni <fantonifabio@tiscali.it> wrote: > >> > xen.efi not compile when we build xen on Wheezy and probably is not > >> > possible boot with lvm volume, fallback options ecc... > >> > >> Just get a suitable tool chain installed then. > >> > >> > UEFI with grub2 seem the best option but with xen hypervisor seem not > >> > load efi variable. > >> > >> Sure, because only xen.efi has the code to deal with such. > >> > >> (Btw., I assume you aren''t aware that any boot manager > >> whatsoever, other than the one coming with EFI, is sort of > >> bogus under EFI?) > > > >Unfortunately it looks like more and more people are of the opinion that > >grub2 is useful even on UEFI firmware. > >For example, it is pretty clear that Ubuntu is still going to boot Xen > >via grub2 no matter how the firmware looks like. > > Then they need to be tought how to do it properly, the more that Linux itself > now is capable of booting without a boot loader (other than the EFI one). > > >What would it take to make Xen work properly with grub2 on a UEFI firmware? > > I can''t be that difficult. > > >I think that we should add it as a work item for Xen 4.3. > > If you have someone to do that work. I''m willing to review the resulting > changes, but I currently don''t see me doing anything here (as being totally > unimportant and - just to repeat that - conceptually wrong).Heh... I agree with Jan but there are so many things conceptually wrong used by millions of people and we could not change that. Let''s fix (broke?) it. I am going to work on EFI stuff in upstream kernel and I think this task could be assigned to me too. Daniel
On Thu, Nov 01, 2012 at 07:57:30PM +0000, Jan Beulich wrote:> >>> Stefano Stabellini <stefano.stabellini@eu.citrix.com> 11/01/12 4:50 PM >>> > >On Tue, 11 Sep 2012, Jan Beulich wrote: > >> >>> On 11.09.12 at 15:17, Fabio Fantoni <fantonifabio@tiscali.it> wrote: > >> > xen.efi not compile when we build xen on Wheezy and probably is not > >> > possible boot with lvm volume, fallback options ecc... > >> > >> Just get a suitable tool chain installed then. > >> > >> > UEFI with grub2 seem the best option but with xen hypervisor seem not > >> > load efi variable. > >> > >> Sure, because only xen.efi has the code to deal with such. > >> > >> (Btw., I assume you aren''t aware that any boot manager > >> whatsoever, other than the one coming with EFI, is sort of > >> bogus under EFI?) > > > >Unfortunately it looks like more and more people are of the opinion that > >grub2 is useful even on UEFI firmware. > >For example, it is pretty clear that Ubuntu is still going to boot Xen > >via grub2 no matter how the firmware looks like. > > Then they need to be tought how to do it properly, the more that Linux itself > now is capable of booting without a boot loader (other than the EFI one). > > >What would it take to make Xen work properly with grub2 on a UEFI firmware? > > I can''t be that difficult.I believe the only issue was the check to do the Multiboot-E820 parsing before the E801 parsing? Perhaps that has already been done?> > >I think that we should add it as a work item for Xen 4.3. > > If you have someone to do that work. I''m willing to review the resulting > changes, but I currently don''t see me doing anything here (as being totally > unimportant and - just to repeat that - conceptually wrong). > > Jan >
>>> On 02.11.12 at 14:52, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> wrote: > On Thu, Nov 01, 2012 at 07:57:30PM +0000, Jan Beulich wrote: >> >>> Stefano Stabellini <stefano.stabellini@eu.citrix.com> 11/01/12 4:50 PM >>> >> >On Tue, 11 Sep 2012, Jan Beulich wrote: >> >> >>> On 11.09.12 at 15:17, Fabio Fantoni <fantonifabio@tiscali.it> wrote: >> >> > xen.efi not compile when we build xen on Wheezy and probably is not >> >> > possible boot with lvm volume, fallback options ecc... >> >> >> >> Just get a suitable tool chain installed then. >> >> >> >> > UEFI with grub2 seem the best option but with xen hypervisor seem not >> >> > load efi variable. >> >> >> >> Sure, because only xen.efi has the code to deal with such. >> >> >> >> (Btw., I assume you aren''t aware that any boot manager >> >> whatsoever, other than the one coming with EFI, is sort of >> >> bogus under EFI?) >> > >> >Unfortunately it looks like more and more people are of the opinion that >> >grub2 is useful even on UEFI firmware. >> >For example, it is pretty clear that Ubuntu is still going to boot Xen >> >via grub2 no matter how the firmware looks like. >> >> Then they need to be tought how to do it properly, the more that Linux > itself >> now is capable of booting without a boot loader (other than the EFI one). >> >> >What would it take to make Xen work properly with grub2 on a UEFI firmware? >> >> I can''t be that difficult. > > I believe the only issue was the check to do the Multiboot-E820 parsing > before the E801 parsing? Perhaps that has already been done?That''s in all 4.x trees already. But no - the other important aspect is that without retrieving/passing on the proper EFI table pointers, on a legacy free system Xen and Dom0 won''t be able to locate the ACPI tables. Jan
On Fri, Nov 02, 2012 at 02:11:22PM +0000, Jan Beulich wrote:> >>> On 02.11.12 at 14:52, Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> wrote: > > On Thu, Nov 01, 2012 at 07:57:30PM +0000, Jan Beulich wrote: > >> >>> Stefano Stabellini <stefano.stabellini@eu.citrix.com> 11/01/12 4:50 PM >>> > >> >On Tue, 11 Sep 2012, Jan Beulich wrote: > >> >> >>> On 11.09.12 at 15:17, Fabio Fantoni <fantonifabio@tiscali.it> wrote: > >> >> > xen.efi not compile when we build xen on Wheezy and probably is not > >> >> > possible boot with lvm volume, fallback options ecc... > >> >> > >> >> Just get a suitable tool chain installed then. > >> >> > >> >> > UEFI with grub2 seem the best option but with xen hypervisor seem not > >> >> > load efi variable. > >> >> > >> >> Sure, because only xen.efi has the code to deal with such. > >> >> > >> >> (Btw., I assume you aren''t aware that any boot manager > >> >> whatsoever, other than the one coming with EFI, is sort of > >> >> bogus under EFI?) > >> > > >> >Unfortunately it looks like more and more people are of the opinion that > >> >grub2 is useful even on UEFI firmware. > >> >For example, it is pretty clear that Ubuntu is still going to boot Xen > >> >via grub2 no matter how the firmware looks like. > >> > >> Then they need to be tought how to do it properly, the more that Linux > > itself > >> now is capable of booting without a boot loader (other than the EFI one). > >> > >> >What would it take to make Xen work properly with grub2 on a UEFI firmware? > >> > >> I can''t be that difficult. > > > > I believe the only issue was the check to do the Multiboot-E820 parsing > > before the E801 parsing? Perhaps that has already been done? > > That''s in all 4.x trees already. But no - the other important aspect > is that without retrieving/passing on the proper EFI table pointers, > on a legacy free system Xen and Dom0 won''t be able to locate the > ACPI tables.Ah yes (<smacks his head - this is what this thread is about after all>). I think the work-around could be to use the kexec introduced arguments: "acpi_rsdp=<physical address of rsdp>"> > Jan >
> > I believe the only issue was the check to do the Multiboot-E820 parsing > > before the E801 parsing? Perhaps that has already been done? > > That''s in all 4.x trees already. But no - the other important aspect > is that without retrieving/passing on the proper EFI table pointers, > on a legacy free system Xen and Dom0 won''t be able to locate the > ACPI tables.How does this work with native Linux? AIUI the most common way to boot regular Linux is using grub-efi. Ian.
On Fri, 2 Nov 2012 14:22:52 +0000 Ian Campbell <ian.campbell@citrix.com> wrote:> > > > I believe the only issue was the check to do the Multiboot-E820 parsing > > > before the E801 parsing? Perhaps that has already been done? > > > > That''s in all 4.x trees already. But no - the other important aspect > > is that without retrieving/passing on the proper EFI table pointers, > > on a legacy free system Xen and Dom0 won''t be able to locate the > > ACPI tables. > > How does this work with native Linux? AIUI the most common way to boot > regular Linux is using grub-efi.The preferred way to boot Linux on an EFI platform is to build an EFI Linux kernel and just let EFI run it. This is supported from 3.3 onwards. All you then need is one of the innumerable EFI boot chooses that are springing up (rEFInd, Gummiboot etc) or use the UEFI Shell or efibootmgr Alan
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