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Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390
From: |
Alexander Graf |
Subject: |
Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390 |
Date: |
Fri, 4 May 2012 20:12:07 +0200 |
On 04.05.2012, at 16:02, Christian Borntraeger wrote:
> On 04/05/12 16:00, Christian Borntraeger wrote:
>>>> An IPL (booting) on s390 of SCSI disks is done by a firmware component.
>>>> Lets implement this scheme as an qemu device that also allows to
>>>> configure the IPL like the HMC. We have a parameter iplid that
>>>> refers to a disk device and a load parm that specifies the entry
>>>> on the disk to be ipled. We also provide a default device
>>>> if no -device s390-ipl statement is given.
>>>
>>> Any reason we can't do this in guest firmware code?
>>
>> Conceptually guest firmware does not exist in the guest address space
>> on s390. It is separate in a storage area called HSA.
>> (you could say the existing hardware is semi-hosted, you cant buy it bare
>> metal.
>> Doing the boot code in guest address space will fail if the guest firmware
>> address collides with the addresses specified by a bootmap.
>
> Or in other words, this code is closer to the real s390 boxes.
Yeah, I see the point. I'd really like to get Anthony's comments on this one
first though.
Alex
- [Qemu-devel] [PATCH 0/1] RFC: ipl device for s390, Christian Borntraeger, 2012/05/04
- [Qemu-devel] [PATCH 1/1] s390: IPL device for s390, Christian Borntraeger, 2012/05/04
- Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390, Alexander Graf, 2012/05/04
- Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390, Christian Borntraeger, 2012/05/04
- Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390, Christian Borntraeger, 2012/05/04
- Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390,
Alexander Graf <=
- Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390, Christian Borntraeger, 2012/05/08
- Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390, Alexander Graf, 2012/05/08
- Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390, Christian Borntraeger, 2012/05/08
- Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390, Alexander Graf, 2012/05/08
- Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390, Christian Borntraeger, 2012/05/08
- Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390, Alexander Graf, 2012/05/08
- Re: [Qemu-devel] [PATCH 1/1] s390: IPL device for s390, Anthony Liguori, 2012/05/08