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Re: [Qemu-ppc] Qemu boot device precedence over nvram boot-device settin
From: |
Nikunj A Dadhania |
Subject: |
Re: [Qemu-ppc] Qemu boot device precedence over nvram boot-device setting |
Date: |
Thu, 27 Sep 2012 16:04:54 +0530 |
User-agent: |
Notmuch/0.13.2 (http://notmuchmail.org) Emacs/24.0.95.1 (x86_64-redhat-linux-gnu) |
On Thu, 27 Sep 2012 12:13:05 +0200, Gleb Natapov <address@hidden> wrote:
> On Thu, Sep 27, 2012 at 03:35:53PM +0530, Nikunj A Dadhania wrote:
> >
> > If the user does not set bootindex, qemu would decide the bootindex?
> >
> No. Firmware decides. QEMU just tells to firmware that it does not have
> bootindex.
Ok. That should work in that case, we need to make sure that bootindex
is being send via device-tree. I do not see such code in place
currently.
>
> > If it does, there will be a default bootindex. Then the problem still
> > remains, qemu decided the boot-order, in which case we would want to
> > pick the nvram based setting. This is again difficult to distinguish.
> >
> > > There is nothing "blurry" about OF device
> > > path. The problem is that it works reasonably well with legacy BIOS
> > > since it is enough to specify device to boot from, but with EFI (OF is
> > > the same I guess) it is not enough to point to a device to boot from,
> > > but you also need to specify a file you want to boot and this is where
> > > bootindex approach fails.
> >
> > By file I suppose you mean OF device-path.
> >
> No. By file I mean a file on dedicated EFI FAT partition that EFI loads
> during boot. I do not know if OF has something similar.
>
No, it just needs the device-path. Rest it figures out.
Regards
Nikunj
- [Qemu-ppc] Qemu boot device precedence over nvram boot-device setting, Avik Sil, 2012/09/27
- Re: [Qemu-ppc] Qemu boot device precedence over nvram boot-device setting, Benjamin Herrenschmidt, 2012/09/27
- Re: [Qemu-ppc] Qemu boot device precedence over nvram boot-device setting, Alexander Graf, 2012/09/27
- Re: [Qemu-ppc] Qemu boot device precedence over nvram boot-device setting, Gleb Natapov, 2012/09/27
- Re: [Qemu-ppc] Qemu boot device precedence over nvram boot-device setting, Nikunj A Dadhania, 2012/09/27
- Re: [Qemu-ppc] Qemu boot device precedence over nvram boot-device setting, Gleb Natapov, 2012/09/27
- Re: [Qemu-ppc] Qemu boot device precedence over nvram boot-device setting,
Nikunj A Dadhania <=
- Re: [Qemu-ppc] Qemu boot device precedence over nvram boot-device setting, Gleb Natapov, 2012/09/27
- Re: [Qemu-ppc] Qemu boot device precedence over nvram boot-device setting, Benjamin Herrenschmidt, 2012/09/27
- Re: [Qemu-ppc] [Qemu-devel] Qemu boot device precedence over nvram boot-device setting, Gleb Natapov, 2012/09/27
- Re: [Qemu-ppc] [Qemu-devel] Qemu boot device precedence over nvram boot-device setting, Jordan Justen, 2012/09/28
Re: [Qemu-ppc] Qemu boot device precedence over nvram boot-device setting, Alexander Graf, 2012/09/27