Cannot create mini-os guest for arm64

Cannot create mini-os guest for arm64

[Chen Baozi]

Hi Ian,

I've done the basic interfaces/framework to pass mini-os build on arm64,
which still needs lots of implementation to work properly.

Then I tried to create the mini-os guest for arm64 on Fast Model environment
to drive the following porting. (I know it must not work at present, but it
would give some feedback through the test.) However, when I tried to "xl
create" the mini-os, it reported the following errors:

Parsing config from /etc/xen/stubdom.pvlinux
xc: error: panic: xc_dom_core.c:608: xc_dom_find_arch_hooks: not found (type xen-3.0-unknown): Invalid kernel
xc: error: panic: xc_dom_core.c:763: xc_dom_mem_init: arch hooks not set: Internal error
libxl: error: libxl_dom.c:384:libxl__build_pv: xc_dom_mem_init failed: No such file or directory
libxl: error: libxl_create.c:908:domcreate_rebuild_done: cannot (re-)build domain: -3

And the stubdom.pvlinux configs is:

# Guest name
name = "mini-os.pvlinux"

# Kernel image to boot
kernel = "/minios/mini-os.gz"

# Initial memory allocation (MB)
memory = 128

# Number of VCPUS
vcpus = 1

Any ideas?

Thanks.

Chen Baozi

Re: Cannot create mini-os guest for arm64

[Ian Campbell]

On Thu, 2013-05-16 at 17:49 +0800, Chen Baozi wrote:
> Hi Ian,
> 
> I've done the basic interfaces/framework to pass mini-os build on arm64,
> which still needs lots of implementation to work properly.
> 
> Then I tried to create the mini-os guest for arm64 on Fast Model environment
> to drive the following porting. (I know it must not work at present, but it
> would give some feedback through the test.) However, when I tried to "xl
> create" the mini-os, it reported the following errors:

There are some issues with loading guests from ELF (rather than zImage)
kernels on ARM. I think Sander (CCd) got to the bottom of it and may
even have posted a patch or two?

Ian.

Re: Cannot create mini-os guest for arm64

[Chen Baozi]

On May 16, 2013, at 10:41 PM, Ian Campbell <ian.campbell@citrix.com> wrote:

> On Thu, 2013-05-16 at 17:49 +0800, Chen Baozi wrote:
>> Hi Ian,
>> 
>> I've done the basic interfaces/framework to pass mini-os build on arm64,
>> which still needs lots of implementation to work properly.
>> 
>> Then I tried to create the mini-os guest for arm64 on Fast Model environment
>> to drive the following porting. (I know it must not work at present, but it
>> would give some feedback through the test.) However, when I tried to "xl
>> create" the mini-os, it reported the following errors:
> 
> There are some issues with loading guests from ELF (rather than zImage)
> kernels on ARM.
Is it possible because of there is no arm64 "guest_type" of xc_dom_arch struct? I can only find "den-3.0-armv7l" guest_type related codes in libxc files.

Baozi.

> I think Sander (CCd) got to the bottom of it and may
> even have posted a patch or two?
> 
> Ian.
> 

Re: Cannot create mini-os guest for arm64

[Ian Campbell]

On Thu, 2013-05-16 at 23:34 +0800, Chen Baozi wrote:
> On May 16, 2013, at 10:41 PM, Ian Campbell <ian.campbell@citrix.com> wrote:
> 
> > On Thu, 2013-05-16 at 17:49 +0800, Chen Baozi wrote:
> >> Hi Ian,
> >> 
> >> I've done the basic interfaces/framework to pass mini-os build on arm64,
> >> which still needs lots of implementation to work properly.
> >> 
> >> Then I tried to create the mini-os guest for arm64 on Fast Model environment
> >> to drive the following porting. (I know it must not work at present, but it
> >> would give some feedback through the test.) However, when I tried to "xl
> >> create" the mini-os, it reported the following errors:
> > 
> > There are some issues with loading guests from ELF (rather than zImage)
> > kernels on ARM.
> Is it possible because of there is no arm64 "guest_type" of
> xc_dom_arch struct? I can only find "den-3.0-armv7l" guest_type
> related codes in libxc files.

Oh, yes, we haven't done arm64 guests yet... Sorry I forgot about this
before. Hrm, that does rather block you from doing arm64 mini-os.

I posted a series to allow 64-bit dom0 a while back but we are currently
frozen so it has been committed, but that's the obvious starting point
for 64-bit guest support.

I don't recall why you are looking at 64-bit minios rather than 32-bit,
is that an option? A lot of the code should end up common.

Ian.

Re: Cannot create mini-os guest for arm64

[Chen Baozi]

On May 17, 2013, at 12:20 AM, Ian Campbell <Ian.Campbell@citrix.com> wrote:

> On Thu, 2013-05-16 at 23:34 +0800, Chen Baozi wrote:
>> On May 16, 2013, at 10:41 PM, Ian Campbell <ian.campbell@citrix.com> wrote:
>> 
>>> On Thu, 2013-05-16 at 17:49 +0800, Chen Baozi wrote:
>>>> Hi Ian,
>>>> 
>>>> I've done the basic interfaces/framework to pass mini-os build on arm64,
>>>> which still needs lots of implementation to work properly.
>>>> 
>>>> Then I tried to create the mini-os guest for arm64 on Fast Model environment
>>>> to drive the following porting. (I know it must not work at present, but it
>>>> would give some feedback through the test.) However, when I tried to "xl
>>>> create" the mini-os, it reported the following errors:
>>> 
>>> There are some issues with loading guests from ELF (rather than zImage)
>>> kernels on ARM.
>> Is it possible because of there is no arm64 "guest_type" of
>> xc_dom_arch struct? I can only find "den-3.0-armv7l" guest_type
>> related codes in libxc files.
> 
> Oh, yes, we haven't done arm64 guests yet... Sorry I forgot about this
> before. Hrm, that does rather block you from doing arm64 mini-os.
> 
> I posted a series to allow 64-bit dom0 a while back but we are currently
> frozen so it has been committed, but that's the obvious starting point
> for 64-bit guest support.
> 
> I don't recall why you are looking at 64-bit minios rather than 32-bit,
> is that an option? A lot of the code should end up common.
I did plan to start the work on arm32 at the very beginning. But The only platform of cortex-a15 I've got is the samsung's chromebook. I tried hard to run Xen on it but didn't succeed in the end due to the lack of debug method. At the same time, I've got an chance getting involved in a arm64 project of our lab so it is easy to have a FastModel license, which at least is a debugable platform for my at present. 

PS, I ordered an OMAP5 development board, but it is stilling on shipping. 

> 
> Ian.
> 

Re: Cannot create mini-os guest for arm64

[Ian Campbell]

On Fri, 2013-05-17 at 08:00 +0800, Chen Baozi wrote:
> On May 17, 2013, at 12:20 AM, Ian Campbell <Ian.Campbell@citrix.com> wrote:
> 
> > On Thu, 2013-05-16 at 23:34 +0800, Chen Baozi wrote:
> >> On May 16, 2013, at 10:41 PM, Ian Campbell <ian.campbell@citrix.com> wrote:
> >> 
> >>> On Thu, 2013-05-16 at 17:49 +0800, Chen Baozi wrote:
> >>>> Hi Ian,
> >>>> 
> >>>> I've done the basic interfaces/framework to pass mini-os build on arm64,
> >>>> which still needs lots of implementation to work properly.
> >>>> 
> >>>> Then I tried to create the mini-os guest for arm64 on Fast Model environment
> >>>> to drive the following porting. (I know it must not work at present, but it
> >>>> would give some feedback through the test.) However, when I tried to "xl
> >>>> create" the mini-os, it reported the following errors:
> >>> 
> >>> There are some issues with loading guests from ELF (rather than zImage)
> >>> kernels on ARM.
> >> Is it possible because of there is no arm64 "guest_type" of
> >> xc_dom_arch struct? I can only find "den-3.0-armv7l" guest_type
> >> related codes in libxc files.
> > 
> > Oh, yes, we haven't done arm64 guests yet... Sorry I forgot about this
> > before. Hrm, that does rather block you from doing arm64 mini-os.
> > 
> > I posted a series to allow 64-bit dom0 a while back but we are currently
> > frozen so it has been committed, but that's the obvious starting point
> > for 64-bit guest support.
> > 
> > I don't recall why you are looking at 64-bit minios rather than 32-bit,
> > is that an option? A lot of the code should end up common.
> I did plan to start the work on arm32 at the very beginning. But The
> only platform of cortex-a15 I've got is the samsung's chromebook. I
> tried hard to run Xen on it but didn't succeed in the end due to the
> lack of debug method. At the same time, I've got an chance getting
> involved in a arm64 project of our lab so it is easy to have a
> FastModel license, which at least is a debugable platform for my at
> present. 

You should be able to run arm32 guests on that platform.

> PS, I ordered an OMAP5 development board, but it is stilling on shipping. 

Which devboard did you go for?

Re: Cannot create mini-os guest for arm64

[Chen Baozi]

On Fri, May 17, 2013 at 10:26:08AM +0100, Ian Campbell wrote:
> On Fri, 2013-05-17 at 08:00 +0800, Chen Baozi wrote:
> > On May 17, 2013, at 12:20 AM, Ian Campbell <Ian.Campbell@citrix.com> wrote:
> > 
> > > On Thu, 2013-05-16 at 23:34 +0800, Chen Baozi wrote:
> > >> On May 16, 2013, at 10:41 PM, Ian Campbell <ian.campbell@citrix.com> wrote:
> > >> 
> > >>> On Thu, 2013-05-16 at 17:49 +0800, Chen Baozi wrote:
> > >>>> Hi Ian,
> > >>>> 
> > >>>> I've done the basic interfaces/framework to pass mini-os build on arm64,
> > >>>> which still needs lots of implementation to work properly.
> > >>>> 
> > >>>> Then I tried to create the mini-os guest for arm64 on Fast Model environment
> > >>>> to drive the following porting. (I know it must not work at present, but it
> > >>>> would give some feedback through the test.) However, when I tried to "xl
> > >>>> create" the mini-os, it reported the following errors:
> > >>> 
> > >>> There are some issues with loading guests from ELF (rather than zImage)
> > >>> kernels on ARM.
> > >> Is it possible because of there is no arm64 "guest_type" of
> > >> xc_dom_arch struct? I can only find "den-3.0-armv7l" guest_type
> > >> related codes in libxc files.
> > > 
> > > Oh, yes, we haven't done arm64 guests yet... Sorry I forgot about this
> > > before. Hrm, that does rather block you from doing arm64 mini-os.
> > > 
> > > I posted a series to allow 64-bit dom0 a while back but we are currently
> > > frozen so it has been committed, but that's the obvious starting point
> > > for 64-bit guest support.
> > > 
> > > I don't recall why you are looking at 64-bit minios rather than 32-bit,
> > > is that an option? A lot of the code should end up common.
> > I did plan to start the work on arm32 at the very beginning. But The
> > only platform of cortex-a15 I've got is the samsung's chromebook. I
> > tried hard to run Xen on it but didn't succeed in the end due to the
> > lack of debug method. At the same time, I've got an chance getting
> > involved in a arm64 project of our lab so it is easy to have a
> > FastModel license, which at least is a debugable platform for my at
> > present. 
> 
> You should be able to run arm32 guests on that platform.
Ok, I'll try it next.

> 
> > PS, I ordered an OMAP5 development board, but it is stilling on shipping. 
> 
> Which devboard did you go for?
It is OMAP5432 uEVM from SVTronics.

BTW, I found I can only run Xen hypervisor of your arm-cross2 git branch on
Fast Model. For the version built from xen mainline, the program would
run to an unknown address after paging enabled. (more exactly, from the
'isb' instruction which in line 267 of arch/arm/arm64/head.S.)

Any ideas?

Thanks.

Baozi.

Re: Cannot create mini-os guest for arm64

[Ian Campbell]

On Fri, 2013-05-17 at 17:58 +0800, Chen Baozi wrote:
> On Fri, May 17, 2013 at 10:26:08AM +0100, Ian Campbell wrote:
> > On Fri, 2013-05-17 at 08:00 +0800, Chen Baozi wrote:
> > > On May 17, 2013, at 12:20 AM, Ian Campbell <Ian.Campbell@citrix.com> wrote:
> > > 
> > > > On Thu, 2013-05-16 at 23:34 +0800, Chen Baozi wrote:
> > > >> On May 16, 2013, at 10:41 PM, Ian Campbell <ian.campbell@citrix.com> wrote:
> > > >> 
> > > >>> On Thu, 2013-05-16 at 17:49 +0800, Chen Baozi wrote:
> > > >>>> Hi Ian,
> > > >>>> 
> > > >>>> I've done the basic interfaces/framework to pass mini-os build on arm64,
> > > >>>> which still needs lots of implementation to work properly.
> > > >>>> 
> > > >>>> Then I tried to create the mini-os guest for arm64 on Fast Model environment
> > > >>>> to drive the following porting. (I know it must not work at present, but it
> > > >>>> would give some feedback through the test.) However, when I tried to "xl
> > > >>>> create" the mini-os, it reported the following errors:
> > > >>> 
> > > >>> There are some issues with loading guests from ELF (rather than zImage)
> > > >>> kernels on ARM.
> > > >> Is it possible because of there is no arm64 "guest_type" of
> > > >> xc_dom_arch struct? I can only find "den-3.0-armv7l" guest_type
> > > >> related codes in libxc files.
> > > > 
> > > > Oh, yes, we haven't done arm64 guests yet... Sorry I forgot about this
> > > > before. Hrm, that does rather block you from doing arm64 mini-os.
> > > > 
> > > > I posted a series to allow 64-bit dom0 a while back but we are currently
> > > > frozen so it has been committed, but that's the obvious starting point
> > > > for 64-bit guest support.
> > > > 
> > > > I don't recall why you are looking at 64-bit minios rather than 32-bit,
> > > > is that an option? A lot of the code should end up common.
> > > I did plan to start the work on arm32 at the very beginning. But The
> > > only platform of cortex-a15 I've got is the samsung's chromebook. I
> > > tried hard to run Xen on it but didn't succeed in the end due to the
> > > lack of debug method. At the same time, I've got an chance getting
> > > involved in a arm64 project of our lab so it is easy to have a
> > > FastModel license, which at least is a debugable platform for my at
> > > present. 
> > 
> > You should be able to run arm32 guests on that platform.
> Ok, I'll try it next.
> 
> > 
> > > PS, I ordered an OMAP5 development board, but it is stilling on shipping. 
> > 
> > Which devboard did you go for?
> It is OMAP5432 uEVM from SVTronics.
> 
> BTW, I found I can only run Xen hypervisor of your arm-cross2 git branch on
> Fast Model. For the version built from xen mainline, the program would
> run to an unknown address after paging enabled. (more exactly, from the
> 'isb' instruction which in line 267 of arch/arm/arm64/head.S.)
> 
> Any ideas?

That ISB is effectively the point at which paging gets enabled.

I'm afraid I've not seen anything like that for a very long time, commit
56bbdea (which is pretty recent) works OK for me on both 32 and 64 bit
models.

What version of the model do you use? How are you invoking it?

Ian.

Re: Cannot create mini-os guest for arm64

[Chen Baozi]

On Fri, May 17, 2013 at 03:30:24PM +0100, Ian Campbell wrote:
> On Fri, 2013-05-17 at 17:58 +0800, Chen Baozi wrote:
> > On Fri, May 17, 2013 at 10:26:08AM +0100, Ian Campbell wrote:
> > > On Fri, 2013-05-17 at 08:00 +0800, Chen Baozi wrote:
> > > > On May 17, 2013, at 12:20 AM, Ian Campbell <Ian.Campbell@citrix.com> wrote:
> > > > 
> > > > > On Thu, 2013-05-16 at 23:34 +0800, Chen Baozi wrote:
> > > > >> On May 16, 2013, at 10:41 PM, Ian Campbell <ian.campbell@citrix.com> wrote:
> > > > >> 
> > > > >>> On Thu, 2013-05-16 at 17:49 +0800, Chen Baozi wrote:
> > > > >>>> Hi Ian,
> > > > >>>> 
> > > > >>>> I've done the basic interfaces/framework to pass mini-os build on arm64,
> > > > >>>> which still needs lots of implementation to work properly.
> > > > >>>> 
> > > > >>>> Then I tried to create the mini-os guest for arm64 on Fast Model environment
> > > > >>>> to drive the following porting. (I know it must not work at present, but it
> > > > >>>> would give some feedback through the test.) However, when I tried to "xl
> > > > >>>> create" the mini-os, it reported the following errors:
> > > > >>> 
> > > > >>> There are some issues with loading guests from ELF (rather than zImage)
> > > > >>> kernels on ARM.
> > > > >> Is it possible because of there is no arm64 "guest_type" of
> > > > >> xc_dom_arch struct? I can only find "den-3.0-armv7l" guest_type
> > > > >> related codes in libxc files.
> > > > > 
> > > > > Oh, yes, we haven't done arm64 guests yet... Sorry I forgot about this
> > > > > before. Hrm, that does rather block you from doing arm64 mini-os.
> > > > > 
> > > > > I posted a series to allow 64-bit dom0 a while back but we are currently
> > > > > frozen so it has been committed, but that's the obvious starting point
> > > > > for 64-bit guest support.
> > > > > 
> > > > > I don't recall why you are looking at 64-bit minios rather than 32-bit,
> > > > > is that an option? A lot of the code should end up common.
> > > > I did plan to start the work on arm32 at the very beginning. But The
> > > > only platform of cortex-a15 I've got is the samsung's chromebook. I
> > > > tried hard to run Xen on it but didn't succeed in the end due to the
> > > > lack of debug method. At the same time, I've got an chance getting
> > > > involved in a arm64 project of our lab so it is easy to have a
> > > > FastModel license, which at least is a debugable platform for my at
> > > > present. 
> > > 
> > > You should be able to run arm32 guests on that platform.
> > Ok, I'll try it next.
> > 
> > > 
> > > > PS, I ordered an OMAP5 development board, but it is stilling on shipping. 
> > > 
> > > Which devboard did you go for?
> > It is OMAP5432 uEVM from SVTronics.
> > 
> > BTW, I found I can only run Xen hypervisor of your arm-cross2 git branch on
> > Fast Model. For the version built from xen mainline, the program would
> > run to an unknown address after paging enabled. (more exactly, from the
> > 'isb' instruction which in line 267 of arch/arm/arm64/head.S.)
> > 
> > Any ideas?
> 
> That ISB is effectively the point at which paging gets enabled.
> 
> I'm afraid I've not seen anything like that for a very long time, commit
> 56bbdea (which is pretty recent) works OK for me on both 32 and 64 bit
> models.
> 
> What version of the model do you use? How are you invoking it?

I'm using Fast Model (Model Debugger - 8.0.027, Model Shell 8.0.16). To
invoking it, I use the following command:

modeldebugger/model_shell64 $ATLAS_MODEL /path/to/xen-syms -C
motherboard.flashloader0.fname=~/path/to/zImage -C
motherboard.mmc.p_mmc_file=/path/to/rootfs

$ATLAS_MODEL=~/ARM/FastModelsPortfolio_8.0/examples/RTSM_VE/Build_Atlasx4/Linux-Release-GCC-4.1/cadi_system_Linux-Release-GCC-4.1.so

> 
> Ian.
> 

Re: Cannot create mini-os guest for arm64

[Chen Baozi]

On Mon, May 20, 2013 at 09:19:21AM +0800, Chen Baozi wrote:
> On Fri, May 17, 2013 at 03:30:24PM +0100, Ian Campbell wrote:
> > On Fri, 2013-05-17 at 17:58 +0800, Chen Baozi wrote:
> > > On Fri, May 17, 2013 at 10:26:08AM +0100, Ian Campbell wrote:
> > > > On Fri, 2013-05-17 at 08:00 +0800, Chen Baozi wrote:
> > > > > On May 17, 2013, at 12:20 AM, Ian Campbell <Ian.Campbell@citrix.com> wrote:
> > > > > 
> > > > > > On Thu, 2013-05-16 at 23:34 +0800, Chen Baozi wrote:
> > > > > >> On May 16, 2013, at 10:41 PM, Ian Campbell <ian.campbell@citrix.com> wrote:
> > > > > >> 
> > > > > >>> On Thu, 2013-05-16 at 17:49 +0800, Chen Baozi wrote:
> > > > > >>>> Hi Ian,
> > > > > >>>> 
> > > > > >>>> I've done the basic interfaces/framework to pass mini-os build on arm64,
> > > > > >>>> which still needs lots of implementation to work properly.
> > > > > >>>> 
> > > > > >>>> Then I tried to create the mini-os guest for arm64 on Fast Model environment
> > > > > >>>> to drive the following porting. (I know it must not work at present, but it
> > > > > >>>> would give some feedback through the test.) However, when I tried to "xl
> > > > > >>>> create" the mini-os, it reported the following errors:
> > > > > >>> 
> > > > > >>> There are some issues with loading guests from ELF (rather than zImage)
> > > > > >>> kernels on ARM.
> > > > > >> Is it possible because of there is no arm64 "guest_type" of
> > > > > >> xc_dom_arch struct? I can only find "den-3.0-armv7l" guest_type
> > > > > >> related codes in libxc files.
> > > > > > 
> > > > > > Oh, yes, we haven't done arm64 guests yet... Sorry I forgot about this
> > > > > > before. Hrm, that does rather block you from doing arm64 mini-os.
> > > > > > 
> > > > > > I posted a series to allow 64-bit dom0 a while back but we are currently
> > > > > > frozen so it has been committed, but that's the obvious starting point
> > > > > > for 64-bit guest support.
> > > > > > 
> > > > > > I don't recall why you are looking at 64-bit minios rather than 32-bit,
> > > > > > is that an option? A lot of the code should end up common.
> > > > > I did plan to start the work on arm32 at the very beginning. But The
> > > > > only platform of cortex-a15 I've got is the samsung's chromebook. I
> > > > > tried hard to run Xen on it but didn't succeed in the end due to the
> > > > > lack of debug method. At the same time, I've got an chance getting
> > > > > involved in a arm64 project of our lab so it is easy to have a
> > > > > FastModel license, which at least is a debugable platform for my at
> > > > > present. 
> > > > 
> > > > You should be able to run arm32 guests on that platform.
> > > Ok, I'll try it next.
> > > 
> > > > 
> > > > > PS, I ordered an OMAP5 development board, but it is stilling on shipping. 
> > > > 
> > > > Which devboard did you go for?
> > > It is OMAP5432 uEVM from SVTronics.
> > > 
> > > BTW, I found I can only run Xen hypervisor of your arm-cross2 git branch on
> > > Fast Model. For the version built from xen mainline, the program would
> > > run to an unknown address after paging enabled. (more exactly, from the
> > > 'isb' instruction which in line 267 of arch/arm/arm64/head.S.)
> > > 
> > > Any ideas?
> > 
> > That ISB is effectively the point at which paging gets enabled.
> > 
> > I'm afraid I've not seen anything like that for a very long time, commit
> > 56bbdea (which is pretty recent) works OK for me on both 32 and 64 bit
> > models.
> > 
> > What version of the model do you use? How are you invoking it?
> 
> I'm using Fast Model (Model Debugger - 8.0.027, Model Shell 8.0.16). To
> invoking it, I use the following command:
> 
> modeldebugger/model_shell64 $ATLAS_MODEL /path/to/xen-syms -C
> motherboard.flashloader0.fname=~/path/to/zImage -C
> motherboard.mmc.p_mmc_file=/path/to/rootfs

Sorry, I think the problem described above only happened if I use "xen-syms"
for debugging. If I switch to "xen", there is no such problem on paging though
it still not work (phenomenons: couldn't see any output).

So the situation is that xen-syms doesn't work for either arm-cross2 branch
or mainline, (I used it by mistake),  while xen doesn't work in mainline but 
arm-cross2 branch.

> 
> $ATLAS_MODEL=~/ARM/FastModelsPortfolio_8.0/examples/RTSM_VE/Build_Atlasx4/Linux-Release-GCC-4.1/cadi_system_Linux-Release-GCC-4.1.so
> 
> > 
> > Ian.
> > 

Re: Cannot create mini-os guest for arm64

[Ian Campbell]

On Mon, 2013-05-20 at 11:37 +0800, Chen Baozi wrote:
> Sorry, I think the problem described above only happened if I use "xen-syms"
> for debugging. If I switch to "xen", there is no such problem on paging though
> it still not work (phenomenons: couldn't see any output).

xen-syms is not suitable for booting, only for pointing GDB at.

> So the situation is that xen-syms doesn't work for either arm-cross2 branch
> or mainline, (I used it by mistake),  while xen doesn't work in mainline but 
> arm-cross2 branch.

What is the failure mode here? I'm not sure which of your previous
symptoms were related to the use of xen-syms.

Ian.

Re: Cannot create mini-os guest for arm64

[Chen Baozi]

On May 20, 2013, at 5:11 PM, Ian Campbell <Ian.Campbell@citrix.com> wrote:

> On Mon, 2013-05-20 at 11:37 +0800, Chen Baozi wrote:
>> Sorry, I think the problem described above only happened if I use "xen-syms"
>> for debugging. If I switch to "xen", there is no such problem on paging though
>> it still not work (phenomenons: couldn't see any output).
> 
> xen-syms is not suitable for booting, only for pointing GDB at.
> 
>> So the situation is that xen-syms doesn't work for either arm-cross2 branch
>> or mainline, (I used it by mistake),  while xen doesn't work in mainline but 
>> arm-cross2 branch.
> 
> What is the failure mode here? I'm not sure which of your previous
> symptoms were related to the use of xen-syms.
I think xen-syms symptoms is because of my misusing. Sorry for my stupid.

However, if I use "xen" (which works for your arm-cross2 branch) in mainline, there is not any output while booting.

> 
> Ian.
> 

Re: Cannot create mini-os guest for arm64

[Ian Campbell]

On Mon, 2013-05-20 at 19:21 +0800, Chen Baozi wrote:
> On May 20, 2013, at 5:11 PM, Ian Campbell <Ian.Campbell@citrix.com> wrote:
> 
> > On Mon, 2013-05-20 at 11:37 +0800, Chen Baozi wrote:
> >> Sorry, I think the problem described above only happened if I use "xen-syms"
> >> for debugging. If I switch to "xen", there is no such problem on paging though
> >> it still not work (phenomenons: couldn't see any output).
> > 
> > xen-syms is not suitable for booting, only for pointing GDB at.
> > 
> >> So the situation is that xen-syms doesn't work for either arm-cross2 branch
> >> or mainline, (I used it by mistake),  while xen doesn't work in mainline but 
> >> arm-cross2 branch.
> > 
> > What is the failure mode here? I'm not sure which of your previous
> > symptoms were related to the use of xen-syms.
> I think xen-syms symptoms is because of my misusing. Sorry for my stupid.
> 
> However, if I use "xen" (which works for your arm-cross2 branch) in
> mainline, there is not any output while booting.

There have been some changes in mainline. You need to add
"dtuart=serial0" to your bootargs (where serial0 is an alias defined in
your dts).

You may also want to re-enable early-printk for your platform, see
docs/misc/arm/early-printk.txt.

Ian.

Re: Cannot create mini-os guest for arm64

[Chen Baozi]

On May 20, 2013, at 7:24 PM, Ian Campbell <Ian.Campbell@citrix.com> wrote:

> On Mon, 2013-05-20 at 19:21 +0800, Chen Baozi wrote:
>> On May 20, 2013, at 5:11 PM, Ian Campbell <Ian.Campbell@citrix.com> wrote:
>> 
>>> On Mon, 2013-05-20 at 11:37 +0800, Chen Baozi wrote:
>>>> Sorry, I think the problem described above only happened if I use "xen-syms"
>>>> for debugging. If I switch to "xen", there is no such problem on paging though
>>>> it still not work (phenomenons: couldn't see any output).
>>> 
>>> xen-syms is not suitable for booting, only for pointing GDB at.
>>> 
>>>> So the situation is that xen-syms doesn't work for either arm-cross2 branch
>>>> or mainline, (I used it by mistake),  while xen doesn't work in mainline but 
>>>> arm-cross2 branch.
>>> 
>>> What is the failure mode here? I'm not sure which of your previous
>>> symptoms were related to the use of xen-syms.
>> I think xen-syms symptoms is because of my misusing. Sorry for my stupid.
>> 
>> However, if I use "xen" (which works for your arm-cross2 branch) in
>> mainline, there is not any output while booting.
> 
> There have been some changes in mainline. You need to add
> "dtuart=serial0" to your bootargs (where serial0 is an alias defined in
> your dts).
> 
> You may also want to re-enable early-printk for your platform, see
> docs/misc/arm/early-printk.txt.
Thanks a lot. It works for me.

Baozi.

Re: Cannot create mini-os guest for arm64

[Ian Campbell]

On Mon, 2013-05-20 at 09:19 +0800, Chen Baozi wrote:
> I'm using Fast Model (Model Debugger - 8.0.027, Model Shell 8.0.16).

That's a bit old I think, my v8 (AEM) model is 0.8.4702 and v7 (Cortex
A15) is 8.0.44.

Re: Cannot create mini-os guest for arm64

[Chen Baozi]

On May 20, 2013, at 4:56 PM, Ian Campbell <Ian.Campbell@citrix.com> wrote:

> On Mon, 2013-05-20 at 09:19 +0800, Chen Baozi wrote:
>> I'm using Fast Model (Model Debugger - 8.0.027, Model Shell 8.0.16).
> 
> That's a bit old I think, my v8 (AEM) model is 0.8.4702 and v7 (Cortex
> A15) is 8.0.44.
Oh, sorry. I misunderstood the "model" referring to. I'm using the ARM_AEMv8-A_MP Model, version 8.0.44 right now.