Xen project Mailing List

On Mon, Apr 30, 2018 at 3:39 PM, Simon Kuenzer <simon.kuenzer@xxxxxxxxx> wrote:

Hey,

On 30.04.2018 11:39, Ajay Garg wrote:

Thanks Simon for the help.

I did the following on my x86_64 laptop :

###############################################################################
ajay@latitude-3480:~/unikraft/apps/helloworld$ arm-linux-gnueabihf-gcc --version
arm-linux-gnueabihf-gcc (Ubuntu/Linaro 5.4.0-6ubuntu1~16.04.9) 5.4.0 20160609
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

ajay@latitude-3480:~/unikraft/apps/helloworld$ CROSS_COMPILE=arm-linux-gnueabihf-gcc make clean
make[1]: Entering directory '/home/ajay/unikraft/unikraft'
   CLEAN   libxenplat
   CLEAN   libxenbus
   CLEAN   libkvmplat
   CLEAN   liblinuxuplat
   CLEAN   apphelloworld
   CLEAN   libukboot
   CLEAN   libukdebug
   CLEAN   libukargparse
   CLEAN   libnolibc
   CLEAN   libukalloc
   CLEAN   libukallocbbuddy
   CLEAN   libfdt
   CLEAN   build/
make[1]: Leaving directory '/home/ajay/unikraft/unikraft'

ajay@latitude-3480:~/unikraft/apps/helloworld$ CROSS_COMPILE=arm-linux-gnueabihf-gcc make menuconfig
###############################################################################

But I still do not see any arm-options :(

I am wondering which options did you expect to see?

I think you saw already what is currently available in the menu: You select and configure ARM under "Architecture Selection". Afterwards you select your target platforms under "Platform Configuration".

Did you try compiling the image?

On Mon, Apr 30, 2018 at 2:56 PM, Simon Kuenzer <simon.kuenzer@xxxxxxxxx <mailto:simon.kuenzer@neclab.eu>> wrote:

On 30.04.2018 11:24, Simon Kuenzer wrote:

Hay Ajay,

you can actually do both - natively compile on ARM or doing a
cross compilation. Unikraft's main makefile is able to detect
this. This happens transparently. You can only influence it by
setting the CROSS_COMPILE environment variable before calling
make. You should need to remove the -mtune=cortex-a7 and
-mcpu=cortex-a7 flags from
unikraft/unikraft/arch/arm/Makefile.uk <http://efile.uk>.

Sorry, a "no" was missing here: Keep the -mtune=cortex-a7 and
-mcpu=cortex-a7 flags.

In fact, your GCC version might be too old. Unfortunately
Unikraft is not warning you yet but ARM published a patch series
that is going to warn you in the future.

On ARM, I just tested the native compile with
gcc (Debian 6.3.0-18) 6.3.0 20170516

I use the same for the cross compilation from x86:
arm-linux-gnueabihf-gcc (Debian 6.3.0-18) 6.3.0 20170516

For debugging, you can have a look what is getting called with
the verbose option:
make V=1

Thanks,

Simon

On 30.04.2018 10:27, Ajay Garg wrote:

https://github.com/nim-lang/Nim/issues/2620
<https://github.com/nim-lang/Nim/issues/2620> suggests it
might be due to (old) gcc version.

Any chance we can get the following via cross-compilation :

            * arm-options in menuconfig screen?
            * actually cross-compile for arm32 in unikraft
ecosystem?

On Mon, Apr 30, 2018 at 12:25 PM, Ajay Garg
<ajaygargnsit@xxxxxxxxx <mailto:ajaygargnsit@xxxxxxxxx>
<mailto:ajaygargnsit@xxxxxxxxx

<mailto:ajaygargnsit@xxxxxxxxx>>> wrote:

     Hi Simon.

         Right now, you can test Unikraft with Xen on arm32.
Be aware
         that there is a open bug on the memory allocator
for arm
(see:https://wiki.xenproject.org/wiki/Category:Unikraft_Users <https://wiki.xenproject.org/wiki/Category:Unikraft_Users>
<https://wiki.xenproject.org/wiki/Category:Unikraft_Users
<https://wiki.xenproject.org/wiki/Category:Unikraft_Users>>).
         arm64 with Xen is currently not supported but we
working on it.
         Same for KVM and baremetal.

         We use cubieboard2/3 for arm32 tests. These boards
are even
         officially supported by Debian and can run Xen.

     So we bought a cubieboard2 :)

     Brought the board up without xen.
     Then brought the board up with xen.

     At this point, "sudo xl list" lists "Domain-0" fine.

     Now, we are wanting to run the
helloworld-unikraft-unikernel.

     To keep aside any cross-compilation issues, we are
compiling on
     cubieboard2 itself.
     Following is the .config file (majorly containing the
"ukdebug" and
     "ukboot" changes required for arm32) :

#################################################################################

     #
     # Automatically generated file; DO NOT EDIT.
     # Unikraft/0.2~8b94640 Configuration
     #

     #
     # Architecture Selection
     #
     # ARCH_X86_64 is not set
     ARCH_ARM_32=y
     # MARCH_CORTEXA7 is not set
     MARCH_A20NEON=y

     #
     # Platform Support
     #
     PLAT_XEN=y
     XEN_DBGEMERGENCY=y
     PLAT_LINUXU=y
     LINUXU_DEFAULT_HEAPMB=4

     #
     # Library Configuration
     #
     HAVE_BOOTENTRY=y
     # HAVE_LIBC is not set
     # HAVE_SCHED is not set
     LIBUKBOOT=y
     LIBUKBOOT_BANNER=y
     LIBUKBOOT_MAXNBARGS=60
     # LIBUKBOOT_INITALLOC is not set
     LIBUKDEBUG=y
     LIBUKDEBUG_PRINTK=y
     LIBUKDEBUG_PRINTD=y
     # LIBUKDEBUG_PRINTD_EXTRA is not set
     # LIBUKDEBUG_PRINTD_INFO is not set
     # LIBUKDEBUG_PRINTD_WARN is not set
     LIBUKDEBUG_PRINTD_ERR=y
     # LIBUKDEBUG_PRINTD_CRIT is not set
     # LIBUKDEBUG_NOREDIR is not set
     # LIBUKDEBUG_REDIR_PRINTD is not set
     LIBUKDEBUG_REDIR_PRINTK=y
     LIBUKDEBUG_ENABLE_ASSERT=y
     LIBUKARGPARSE=y
     LIBNOLIBC=y
     LIBUKALLOC=y
     # LIBUKALLOC_IFPAGES is not set
     # LIBUKALLOC_IFSTATS is not set
     # LIBUKALLOCBBUDDY is not set
     # LIBUKSCHED is not set
     # LIBUKSCHEDCOOP is not set
     LIBFDT=y

     #
     # Build Options
     #
     # OPTIMIZE_NONE is not set
     OPTIMIZE_PERF=y
     # OPTIMIZE_SIZE is not set
     # OPTIMIZE_DEADELIM is not set
     # DEBUG_SYMBOLS is not set
     OPTIMIZE_STRIP=y
     # RECORD_BUILDTIME is not set
     CROSS_COMPILE=""

     #
     # Application Options
     #
     APPHELLOWORLD_DEPENDENCIES=y
     APPHELLOWORLD_PRINTARGS=y
     UK_NAME="helloworld"
#################################################################################

     However, upon compilation, following is observed :

#################################################################################

     debian@debian-armhf:~/unikraft/apps/helloworld$ make
     make[1]: Entering directory
'/home/debian/unikraft/unikraft'
      CP      config
      CC      libxenplat: hypervisor.o
     cc1: error: bad value (cortex-a7) for -mcpu switch
     cc1: error: bad value (cortex-a7) for -mtune switch
/home/debian/unikraft/unikraft/support/build/Makefile.build:48:
     recipe for target
'/home/debian/unikraft/apps/helloworld/build/libxenplat/hypervisor.o'
failed
     make[1]: ***
[/home/debian/unikraft/apps/helloworld/build/libxenplat/hypervisor.o]
Error
     1
     make[1]: Leaving directory '/home/debian/unikraft/unikraft'
     Makefile:6: recipe for target 'all' failed
     make: *** [all] Error 2
     debian@debian-armhf:~/unikraft/apps/helloworld$
#################################################################################

     So, we proceed to remove the -mtune=cortex-a7 and
-mcpu=cortex-a7
     flags from unikraft/unikraft/arch/arm/Makefile.uk
<http://efile.uk>.

     Thereafter, upon recompiling, we get

#################################################################################

     debian@debian-armhf:~/unikraft/apps/helloworld$ make
     make[1]: Entering directory
'/home/debian/unikraft/unikraft'
      CP      config
      CC      libxenplat: hypervisor.o
     In file included from
     /home/debian/unikraft/unikraft/plat/xen/hypervisor.c:43:0:
/home/debian/unikraft/unikraft/include/uk/arch/atomic.h: In
function
     ‘ukarch_test_and_clr_bit’:
/home/debian/unikraft/unikraft/include/uk/arch/atomic.h:90:2:
     warning: implicit declaration of function
‘__atomic_fetch_and’
     [-Wimplicit-function-declaration]
/home/debian/unikraft/unikraft/include/uk/arch/atomic.h:90:40:
     error: ‘__ATOMIC_RELAXED’ undeclared (first use in this
function)
/home/debian/unikraft/unikraft/include/uk/arch/atomic.h:90:40:
note:
     each undeclared identifier is reported only once for
each function
     it appears in
/home/debian/unikraft/unikraft/include/uk/arch/atomic.h: In
function
     ‘ukarch_test_and_set_bit’:
/home/debian/unikraft/unikraft/include/uk/arch/atomic.h:105:2:
     warning: implicit declaration of function
‘__atomic_fetch_or’
     [-Wimplicit-function-declaration]
/home/debian/unikraft/unikraft/include/uk/arch/atomic.h:105:38:
     error: ‘__ATOMIC_RELAXED’ undeclared (first use in this
function)
/home/debian/unikraft/unikraft/include/uk/arch/atomic.h: In
function
     ‘ukarch_test_and_clr_bit_sync’:
/home/debian/unikraft/unikraft/include/uk/arch/atomic.h:148:40:
     error: ‘__ATOMIC_SEQ_CST’ undeclared (first use in this
function)
/home/debian/unikraft/unikraft/include/uk/arch/atomic.h: In
function
     ‘ukarch_test_and_set_bit_sync’:
/home/debian/unikraft/unikraft/include/uk/arch/atomic.h:161:38:
     error: ‘__ATOMIC_SEQ_CST’ undeclared (first use in this
function)
     /home/debian/unikraft/unikraft/plat/xen/hypervisor.c:
In function
     ‘do_hypervisor_callback’:
/home/debian/unikraft/unikraft/plat/xen/hypervisor.c:71:2:
warning:
     implicit declaration of function ‘__atomic_exchange_n’
     [-Wimplicit-function-declaration]
/home/debian/unikraft/unikraft/plat/xen/hypervisor.c:71:7:
error:
     ‘__ATOMIC_SEQ_CST’ undeclared (first use in this function)
/home/debian/unikraft/unikraft/support/build/Makefile.build:48:
     recipe for target
'/home/debian/unikraft/apps/helloworld/build/libxenplat/hypervisor.o'
failed
     make[1]: ***
[/home/debian/unikraft/apps/helloworld/build/libxenplat/hypervisor.o]
Error
     1
     make[1]: Leaving directory '/home/debian/unikraft/unikraft'
     Makefile:6: recipe for target 'all' failed
     make: *** [all] Error 2
#################################################################################

     What are we missing?

     Thanks and Regards,
     Ajay

             Thanks and Regards,
             Ajay

         Thanks,

         Simon

     --     Regards,
     Ajay

-- Regards,
Ajay

--
Regards,
Ajay

Regards,
Ajay

Re: [Minios-devel] [Unikraft] Support for KVM on ARM