Re: Testing xen-arm on Arndale

[Julien Grall <julien.grall@citrix.com>]

On 04/03/2013 12:57 PM, See-Hwan Yoo wrote:

> Thank you, Stefano:
> I have checked -vvv and it seems that xl is looking for a file that is
> missing. I've included the printed message at the tail of the mail.
> I've farmed xl tools through Ian campbell's cross toolchain wiki.
> 
> Making cross toolchain using schroot is a good way around building the
> xen tools, but documentation could be improved if it includes the
> following facts.
> Because the current arndale board's rootfs snapshot does not include the
> proper python library tools, it firstly complains about some missing
> python modules such as 'commands'.
> In addition, libyajl library files are also missing. In the
> cross-compiling phase, I've installed those library's dev port to
> schroot build directory; however, it has to be explicitly copied to the
> rootfs so that libxenguest/libxenlight can refer those libraries.
> Namely, the dependent libraries have to be included in the root file
> system; I hope the document includes specifically which libraries have
> run-time dependency, and which modules are required to run.
> 
> Finally, I am curious about the mismatch in the two debug console
> options: in the bootargs options console=dbgp (given in dts), and codes
> in start_xen() shows
> exynos5_uart_init(2, FIXMAP_ADDR, ...);
> It seems like uart2 is fixed to use as console; but the code seems work
> only when console=dbgp.
> How about using console=com1/2 instead of dbgp? (it seems more intuitive.)

Xen can use up to 3 serials port with the following name: com1, com2, dbgp.
The first is assigned to value 0 and the last 2.
Here, index 2 (ie dbgp) is used because log will output to the second UART.
But it's completely unrelated, and it was for a first draft.

I'm currently trying to clean up the code for the exynos5 in order to have
a single code base for all ARM platforms. I'll plan to modify serial
handling for ARM at that time.

> The log from xl create with -vvv option is as follows:
> xl -vvv create dom1
> Parsing config from dom1
> libxl: verbose: libxl_create.c:130:libxl__domain_build_info_setdefault:
> qemu-xen is unavailable, use qemu-xen-traditional instead: No such file
> or directory
> libxl: debug: libxl_create.c:1236:do_domain_create: ao 0x2ea28: create:
> how=(nil) callback=(nil) poller=0x2e6a8
> xc: detail: domctl operation failed -- need to rebuild the user-space
> tool set?


Which tree do you use to build the tools? You need to use
git clone --branch exynos5250-2013-03-22 git://xenbits.xen.org/people/aperard/xen-arm.git
Exynos5 port uses an old tree and it's not compatible with recent xen
due to ABI breakage. It should allow you to cross compile tools.

> libxl: error: libxl_create.c:423:libxl__domain_make: domain creation fail
> libxl: error: libxl_create.c:651:initiate_domain_create: cannot make
> domain: -3
> libxl: error: libxl.c:1377:libxl__destroy_domid: non-existant domain -1
> libxl: error: libxl.c:1341:domain_destroy_callback: unable to destroy
> guest with domid 4294967295
> libxl: error: libxl_create.c:1215:domcreate_destruction_cb: unable to
> destroy domain 4294967295 following failed creation
> libxl: debug: libxl_event.c:1569:libxl__ao_complete: ao 0x2ea28:
> complete, rc=-3
> libxl: debug: libxl_create.c:1249:do_domain_create: ao 0x2ea28:
> inprogress: poller=0x2e6a8, flags=ic
> libxl: debug: libxl_event.c:1541:libxl__ao__destroy: ao 0x2ea28: destroy
> xc: debug: hypercall buffer: total allocations:5 total releases:5
> xc: debug: hypercall buffer: current allocations:0 maximum allocations:2
> xc: debug: hypercall buffer: cache current size:2
> xc: debug: hypercall buffer: cache hits:3 misses:2 toobig:0
> 


Sincerely yours,

Julien