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[xen-unstable test] 146625: regressions - FAIL



flight 146625 xen-unstable real [real]
http://logs.test-lab.xenproject.org/osstest/logs/146625/

Regressions :-(

Tests which did not succeed and are blocking,
including tests which could not be run:
 build-i386-prev               6 xen-build      fail in 146611 REGR. vs. 146563

Tests which are failing intermittently (not blocking):
 test-amd64-amd64-xl-rtds     15 guest-saverestore          fail pass in 146611

Tests which did not succeed, but are not blocking:
 test-amd64-i386-migrupgrade   1 build-check(1)           blocked in 146611 n/a
 test-amd64-amd64-xl-rtds 18 guest-localmigrate/x10 fail in 146611 blocked in 
146563
 test-amd64-amd64-xl-qemuu-win7-amd64 17 guest-stop            fail like 146563
 test-amd64-amd64-xl-qemut-win7-amd64 17 guest-stop            fail like 146563
 test-amd64-i386-xl-qemut-win7-amd64 17 guest-stop             fail like 146563
 test-amd64-amd64-qemuu-nested-intel 17 debian-hvm-install/l1/l2 fail like 
146563
 test-amd64-i386-xl-qemuu-win7-amd64 17 guest-stop             fail like 146563
 test-armhf-armhf-libvirt-raw 13 saverestore-support-check    fail  like 146563
 test-armhf-armhf-libvirt     14 saverestore-support-check    fail  like 146563
 test-amd64-amd64-xl-qemuu-ws16-amd64 17 guest-stop            fail like 146563
 test-amd64-amd64-xl-qemut-ws16-amd64 17 guest-stop            fail like 146563
 test-amd64-i386-xl-qemuu-ws16-amd64 17 guest-stop             fail like 146563
 test-amd64-i386-xl-pvshim    12 guest-start                  fail   never pass
 test-amd64-amd64-libvirt-xsm 13 migrate-support-check        fail   never pass
 test-amd64-amd64-libvirt     13 migrate-support-check        fail   never pass
 test-amd64-i386-libvirt      13 migrate-support-check        fail   never pass
 test-amd64-i386-libvirt-xsm  13 migrate-support-check        fail   never pass
 test-arm64-arm64-xl-seattle  13 migrate-support-check        fail   never pass
 test-arm64-arm64-xl-seattle  14 saverestore-support-check    fail   never pass
 test-amd64-amd64-libvirt-qemuu-debianhvm-amd64-xsm 11 migrate-support-check 
fail never pass
 test-amd64-i386-libvirt-qemuu-debianhvm-amd64-xsm 11 migrate-support-check 
fail never pass
 test-amd64-amd64-qemuu-nested-amd 17 debian-hvm-install/l1/l2  fail never pass
 test-arm64-arm64-xl-thunderx 13 migrate-support-check        fail   never pass
 test-arm64-arm64-xl-thunderx 14 saverestore-support-check    fail   never pass
 test-arm64-arm64-xl-credit2  13 migrate-support-check        fail   never pass
 test-arm64-arm64-xl          13 migrate-support-check        fail   never pass
 test-arm64-arm64-xl-credit1  13 migrate-support-check        fail   never pass
 test-arm64-arm64-xl-credit2  14 saverestore-support-check    fail   never pass
 test-arm64-arm64-xl          14 saverestore-support-check    fail   never pass
 test-arm64-arm64-xl-credit1  14 saverestore-support-check    fail   never pass
 test-arm64-arm64-xl-xsm      13 migrate-support-check        fail   never pass
 test-arm64-arm64-xl-xsm      14 saverestore-support-check    fail   never pass
 test-arm64-arm64-libvirt-xsm 13 migrate-support-check        fail   never pass
 test-arm64-arm64-libvirt-xsm 14 saverestore-support-check    fail   never pass
 test-amd64-amd64-libvirt-vhd 12 migrate-support-check        fail   never pass
 test-armhf-armhf-xl          13 migrate-support-check        fail   never pass
 test-armhf-armhf-xl          14 saverestore-support-check    fail   never pass
 test-armhf-armhf-xl-rtds     13 migrate-support-check        fail   never pass
 test-armhf-armhf-xl-rtds     14 saverestore-support-check    fail   never pass
 test-armhf-armhf-xl-credit1  13 migrate-support-check        fail   never pass
 test-armhf-armhf-xl-credit1  14 saverestore-support-check    fail   never pass
 test-armhf-armhf-xl-multivcpu 13 migrate-support-check        fail  never pass
 test-armhf-armhf-xl-multivcpu 14 saverestore-support-check    fail  never pass
 test-armhf-armhf-libvirt-raw 12 migrate-support-check        fail   never pass
 test-armhf-armhf-xl-cubietruck 13 migrate-support-check        fail never pass
 test-armhf-armhf-xl-cubietruck 14 saverestore-support-check    fail never pass
 test-armhf-armhf-libvirt     13 migrate-support-check        fail   never pass
 test-armhf-armhf-xl-arndale  13 migrate-support-check        fail   never pass
 test-armhf-armhf-xl-arndale  14 saverestore-support-check    fail   never pass
 test-armhf-armhf-xl-credit2  13 migrate-support-check        fail   never pass
 test-armhf-armhf-xl-credit2  14 saverestore-support-check    fail   never pass
 test-armhf-armhf-xl-vhd      12 migrate-support-check        fail   never pass
 test-armhf-armhf-xl-vhd      13 saverestore-support-check    fail   never pass
 test-amd64-i386-xl-qemut-ws16-amd64 17 guest-stop              fail never pass

version targeted for testing:
 xen                  837da5e3a31938891e4bada2497ec6b7b73908cc
baseline version:
 xen                  f910c3ebc6a178c5cbbc0868134be536fae7f7cf

Last test of basis   146563  2020-01-29 01:55:30 Z    2 days
Failing since        146578  2020-01-29 17:06:19 Z    2 days    5 attempts
Testing same since   146611  2020-01-31 02:31:10 Z    0 days    2 attempts

------------------------------------------------------------
People who touched revisions under test:
  Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  Anthony PERARD <anthony.perard@xxxxxxxxxx>
  Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>
  Jan Beulich <jbeulich@xxxxxxxx>
  Olaf Hering <olaf@xxxxxxxxx>
  Roger Pau Monné <roger.pau@xxxxxxxxxx>
  Tamas K Lengyel <tamas.lengyel@xxxxxxxxx>
  Wei Liu <wl@xxxxxxx>

jobs:
 build-amd64-xsm                                              pass    
 build-arm64-xsm                                              pass    
 build-i386-xsm                                               pass    
 build-amd64-xtf                                              pass    
 build-amd64                                                  pass    
 build-arm64                                                  pass    
 build-armhf                                                  pass    
 build-i386                                                   pass    
 build-amd64-libvirt                                          pass    
 build-arm64-libvirt                                          pass    
 build-armhf-libvirt                                          pass    
 build-i386-libvirt                                           pass    
 build-amd64-prev                                             pass    
 build-i386-prev                                              pass    
 build-amd64-pvops                                            pass    
 build-arm64-pvops                                            pass    
 build-armhf-pvops                                            pass    
 build-i386-pvops                                             pass    
 test-xtf-amd64-amd64-1                                       pass    
 test-xtf-amd64-amd64-2                                       pass    
 test-xtf-amd64-amd64-3                                       pass    
 test-xtf-amd64-amd64-4                                       pass    
 test-xtf-amd64-amd64-5                                       pass    
 test-amd64-amd64-xl                                          pass    
 test-arm64-arm64-xl                                          pass    
 test-armhf-armhf-xl                                          pass    
 test-amd64-i386-xl                                           pass    
 test-amd64-amd64-libvirt-qemuu-debianhvm-amd64-xsm           pass    
 test-amd64-i386-libvirt-qemuu-debianhvm-amd64-xsm            pass    
 test-amd64-amd64-xl-qemut-stubdom-debianhvm-amd64-xsm        pass    
 test-amd64-i386-xl-qemut-stubdom-debianhvm-amd64-xsm         pass    
 test-amd64-amd64-xl-qemut-debianhvm-i386-xsm                 pass    
 test-amd64-i386-xl-qemut-debianhvm-i386-xsm                  pass    
 test-amd64-amd64-xl-qemuu-debianhvm-i386-xsm                 pass    
 test-amd64-i386-xl-qemuu-debianhvm-i386-xsm                  pass    
 test-amd64-amd64-libvirt-xsm                                 pass    
 test-arm64-arm64-libvirt-xsm                                 pass    
 test-amd64-i386-libvirt-xsm                                  pass    
 test-amd64-amd64-xl-xsm                                      pass    
 test-arm64-arm64-xl-xsm                                      pass    
 test-amd64-i386-xl-xsm                                       pass    
 test-amd64-amd64-qemuu-nested-amd                            fail    
 test-amd64-amd64-xl-pvhv2-amd                                pass    
 test-amd64-i386-qemut-rhel6hvm-amd                           pass    
 test-amd64-i386-qemuu-rhel6hvm-amd                           pass    
 test-amd64-amd64-xl-qemut-debianhvm-amd64                    pass    
 test-amd64-i386-xl-qemut-debianhvm-amd64                     pass    
 test-amd64-amd64-xl-qemuu-debianhvm-amd64                    pass    
 test-amd64-i386-xl-qemuu-debianhvm-amd64                     pass    
 test-amd64-i386-freebsd10-amd64                              pass    
 test-amd64-amd64-xl-qemuu-ovmf-amd64                         pass    
 test-amd64-i386-xl-qemuu-ovmf-amd64                          pass    
 test-amd64-amd64-xl-qemut-win7-amd64                         fail    
 test-amd64-i386-xl-qemut-win7-amd64                          fail    
 test-amd64-amd64-xl-qemuu-win7-amd64                         fail    
 test-amd64-i386-xl-qemuu-win7-amd64                          fail    
 test-amd64-amd64-xl-qemut-ws16-amd64                         fail    
 test-amd64-i386-xl-qemut-ws16-amd64                          fail    
 test-amd64-amd64-xl-qemuu-ws16-amd64                         fail    
 test-amd64-i386-xl-qemuu-ws16-amd64                          fail    
 test-armhf-armhf-xl-arndale                                  pass    
 test-amd64-amd64-xl-credit1                                  pass    
 test-arm64-arm64-xl-credit1                                  pass    
 test-armhf-armhf-xl-credit1                                  pass    
 test-amd64-amd64-xl-credit2                                  pass    
 test-arm64-arm64-xl-credit2                                  pass    
 test-armhf-armhf-xl-credit2                                  pass    
 test-armhf-armhf-xl-cubietruck                               pass    
 test-amd64-amd64-xl-qemuu-dmrestrict-amd64-dmrestrict        pass    
 test-amd64-i386-xl-qemuu-dmrestrict-amd64-dmrestrict         pass    
 test-amd64-amd64-examine                                     pass    
 test-arm64-arm64-examine                                     pass    
 test-armhf-armhf-examine                                     pass    
 test-amd64-i386-examine                                      pass    
 test-amd64-i386-freebsd10-i386                               pass    
 test-amd64-amd64-qemuu-nested-intel                          fail    
 test-amd64-amd64-xl-pvhv2-intel                              pass    
 test-amd64-i386-qemut-rhel6hvm-intel                         pass    
 test-amd64-i386-qemuu-rhel6hvm-intel                         pass    
 test-amd64-amd64-libvirt                                     pass    
 test-armhf-armhf-libvirt                                     pass    
 test-amd64-i386-libvirt                                      pass    
 test-amd64-amd64-livepatch                                   pass    
 test-amd64-i386-livepatch                                    pass    
 test-amd64-amd64-migrupgrade                                 pass    
 test-amd64-i386-migrupgrade                                  pass    
 test-amd64-amd64-xl-multivcpu                                pass    
 test-armhf-armhf-xl-multivcpu                                pass    
 test-amd64-amd64-pair                                        pass    
 test-amd64-i386-pair                                         pass    
 test-amd64-amd64-libvirt-pair                                pass    
 test-amd64-i386-libvirt-pair                                 pass    
 test-amd64-amd64-amd64-pvgrub                                pass    
 test-amd64-amd64-i386-pvgrub                                 pass    
 test-amd64-amd64-xl-pvshim                                   pass    
 test-amd64-i386-xl-pvshim                                    fail    
 test-amd64-amd64-pygrub                                      pass    
 test-amd64-amd64-xl-qcow2                                    pass    
 test-armhf-armhf-libvirt-raw                                 pass    
 test-amd64-i386-xl-raw                                       pass    
 test-amd64-amd64-xl-rtds                                     fail    
 test-armhf-armhf-xl-rtds                                     pass    
 test-arm64-arm64-xl-seattle                                  pass    
 test-amd64-amd64-xl-qemuu-debianhvm-amd64-shadow             pass    
 test-amd64-i386-xl-qemuu-debianhvm-amd64-shadow              pass    
 test-amd64-amd64-xl-shadow                                   pass    
 test-amd64-i386-xl-shadow                                    pass    
 test-arm64-arm64-xl-thunderx                                 pass    
 test-amd64-amd64-libvirt-vhd                                 pass    
 test-armhf-armhf-xl-vhd                                      pass    


------------------------------------------------------------
sg-report-flight on osstest.test-lab.xenproject.org
logs: /home/logs/logs
images: /home/logs/images

Logs, config files, etc. are available at
    http://logs.test-lab.xenproject.org/osstest/logs

Explanation of these reports, and of osstest in general, is at
    http://xenbits.xen.org/gitweb/?p=osstest.git;a=blob;f=README.email;hb=master
    http://xenbits.xen.org/gitweb/?p=osstest.git;a=blob;f=README;hb=master

Test harness code can be found at
    http://xenbits.xen.org/gitweb?p=osstest.git;a=summary


Not pushing.

------------------------------------------------------------
commit 837da5e3a31938891e4bada2497ec6b7b73908cc
Author: Jan Beulich <jbeulich@xxxxxxxx>
Date:   Thu Jan 30 17:19:46 2020 +0100

    x86: fold linker script pre-processing rules
    
    There's no need to have twice almost the same rule. Simply add the extra
    -DEFI to AFLAGS for the EFI variant, and specify both targets for the
    then single rule.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

commit f450eaa9c1521c64dc31bdec81a6148b2b0d9552
Author: Jan Beulich <jbeulich@xxxxxxxx>
Date:   Thu Jan 30 17:18:12 2020 +0100

    x86: undo part of "refine link time stub area related assertion"
    
    The original check was not too strict: While we don't use one page of
    memory per CPU, we do use ons page of VA space per CPU. It is the
    latter which matters here.
    
    Undo that part of the change, but leave everything else in place.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

commit b3af8108d5b8f2897984fc1264ec5406d0888a7e
Author: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Date:   Wed Dec 11 16:38:57 2019 +0000

    xen: Move GCC_HAS_VISIBILITY_ATTRIBUTE to Kconfig and common
    
    The check for $(CC) -fvisibility=hidden is done by both arm and x86,
    so the patch also move the check to the common area.
    
    The check doesn't check if $(CC) is gcc, and clang can accept that
    option as well, so s/GCC/CC/ is done to the define name.
    
    Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

commit 67c5d662d768311fae9c7035b305078b81b23909
Author: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Date:   Wed Dec 11 15:27:33 2019 +0000

    xen: Use $(CONFIG_CC_IS_CLANG) instead of $(clang) in Makefile
    
    Kconfig can check if $(CC) is clang or not, if it is
    CONFIG_CC_IS_CLANG will be set.
    
    With that patch, the hypervisor can be built using clang by running
    `make CC=clang CXX=clang++` without needed to provide an extra clang
    parameter.
    
    `make clang=y` still works as Config.mk will set CC and CXX.
    
    Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

commit c3333c3a5d1224513f801aed11953234851bbf96
Author: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Date:   Wed Dec 11 13:55:06 2019 +0000

    xen: Move CONFIG_INDIRECT_THUNK to Kconfig
    
    Now that Kconfig has the capability to run shell command when
    generating CONFIG_* we can use it in some cases to test CFLAGS.
    
    CONFIG_INDIRECT_THUNK is a good example that wants to exist both in
    Makefile and as a C macro, which Kconfig do. So use Kconfig to
    generate CONFIG_INDIRECT_THUNK and have the CFLAGS depends on that.
    
    Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

commit 4c91ad721c80d497fde6740a9f957f66ecff2267
Author: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Date:   Wed Dec 4 17:13:51 2019 +0000

    xen: Import cc-ifversion from Kbuild
    
    This is in preparation of importing Kbuild to build Xen. We won't be
    able to include Config.mk so we will need a replacement for the macro
    `cc-ifversion'.
    
    This patch imports parts of "scripts/Kbuild.include" from Linux v5.4,
    the macro cc-ifversion. It makes use of CONFIG_GCC_VERSION that
    Kconfig now provides.
    
    Since they are no other use of Xen's `cc-ifversion' macro, we can
    remove it.
    
    Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

commit 534519f0514f52007d504e0f2eeb714de7b2468d
Author: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Date:   Wed Dec 4 16:33:23 2019 +0000

    xen: Have Kconfig check $(CC)'s version
    
    This import several files from Linux v5.3
     - scripts/Kconfig.include
     - scripts/clang-version.sh
     - scripts/gcc-version.sh
     and several config values from from Linux's init/Kconfig file.
    But gcc-version.sh have been modified to return "0" when $CC isn't
    GCC, like clang-version.sh do.
    
    Files are copied into scripts/ directory because that's were the files
    are found in Linux tree, and also because we are going to import more
    of Kbuild from Linux which is located in scripts/.
    
    CONFIG_GCC_VERSION and CONFIG_CC_IS_CLANG are going to be use in
    follow-up patches.
    
    Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

commit f80fe2b34f08ba3b08d3ae3f0517380c613ea6ea
Author: Anthony PERARD <anthony.perard@xxxxxxxxxx>
Date:   Tue Sep 17 14:13:50 2019 +0100

    xen: Update Kconfig to Linux v5.4
    
    This patch updates Kconfig to a more recent version of Kconfig, found
    in Linux v5.4.0, 219d54332a09 ("Linux 5.4").
    
    With the updated version of Kconfig, other changes are necessary to
    avoid breaking the build.
    
    Kconfig files:
    - fix Kconfig files that where using option env=*:
      Since Linux commit 104daea149c4 ("kconfig: reference environment
      variables directly and remove 'option env='"), we can access the
      environment directly via $() and "option env=" as been removed.
    - CONFIG_EXPERT='y' will now appear in .config file if
      XEN_CONFIG_EXPERT=y in the environment. The alternative is to change
      "EXPERT" to "$(XEN_CONFIG_EXPERT)" in all Kconfig files.
    
    Makefile:
    - silentoldconfig target as been removed from Kconfig. To update
      include/generated/autoconf.h, we need to use syncconfig target
      instead.
    
    Makefile.kconfig:
    - Import newer needed code from Linux's Makefile.lib and
      Kbuild.include and Makefile.build.
    - Set Q to empty, Xen build system doesn't silence commands. Having Q
      empty mean we can import stuff from Linux without having to remove the
      leading $(Q) from build commands. And quiet='' means commands will be
      echoed.
    - Add $(PHONY) to .PHONY. Like it is intended by Kbuild.
    
    Makefile.host is also updated and copied from Linux.
    
    Dependency change:
    - Now depends on flex/bison, maybe we could _shipped those files like
      before. Linux doesn't do that anymore.
    
    The .gitignore in kconfig/ has more entries, compared to upstream, for
    file generated by Makefile.host.
    
    Signed-off-by: Anthony PERARD <anthony.perard@xxxxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>

commit 9b71d6a759a6835c7723afa3d79e1e7f10da4396
Author: Tamas K Lengyel <tamas.lengyel@xxxxxxxxx>
Date:   Wed Jan 29 15:06:50 2020 +0100

    x86/mem_access: use __get_gfn_type_access in set_mem_access
    
    Use __get_gfn_type_access instead of p2m->get_entry to trigger page-forking
    when the mem_access permission is being set on a page that has not yet been
    copied over from the parent.
    
    Signed-off-by: Tamas K Lengyel <tamas.lengyel@xxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>

commit 5e08f5f56c9955d853c26c985b6fb1fb45d0355d
Author: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>
Date:   Wed Jan 29 15:06:10 2020 +0100

    x86/suspend: disable watchdog before calling console_start_sync()
    
    ... and enable it after exiting S-state. Otherwise accumulated
    output in serial buffer might easily trigger the watchdog if it's
    still enabled after entering sync transmission mode.
    
    The issue observed on machines which, unfortunately, generate non-0
    output in CPU offline callbacks.
    
    Signed-off-by: Igor Druzhinin <igor.druzhinin@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>

commit a29f19f7476a13cd6d7757b3aa5eb26ffd9e3c54
Author: Olaf Hering <olaf@xxxxxxxxx>
Date:   Wed Jan 29 14:48:54 2020 +0100

    x86/domctl: fix typo in comment
    
    The array is named msr_policy.
    
    Fixes commit 60529dfeca1
    
    Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
    Acked-by: Wei Liu <wl@xxxxxxx>

commit 81a3080a3f292e845ff5c1f9c3726219e9a5da2b
Author: Tamas K Lengyel <tamas.lengyel@xxxxxxxxx>
Date:   Wed Jan 29 14:48:15 2020 +0100

    x86/mem_sharing: replace MEM_SHARING_DEBUG with gdprintk
    
    Using XENLOG_ERR level since this is only used in debug paths (ie. it's
    expected the user already has loglvl=all set). Also use %pd to print the 
domain
    ids.
    
    Signed-off-by: Tamas K Lengyel <tamas.lengyel@xxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>

commit 782b48b7f7319c07b044606d67a60875e53dd05b
Author: Roger Pau Monné <roger.pau@xxxxxxxxxx>
Date:   Wed Jan 29 14:47:00 2020 +0100

    x86/apic: fix disabling LVT0 in disconnect_bsp_APIC
    
    The Intel SDM states:
    
    "When an illegal vector value (0 to 15) is written to a LVT entry and
    the delivery mode is Fixed (bits 8-11 equal 0), the APIC may signal an
    illegal vector error, without regard to whether the mask bit is set or
    whether an interrupt is actually seen on the input."
    
    And that's exactly what's currently done in disconnect_bsp_APIC when
    virt_wire_setup is true and LVT LINT0 is being masked. By writing only
    APIC_LVT_MASKED Xen is actually setting the vector to 0 and the
    delivery mode to Fixed (0), and hence it triggers an APIC error even
    when the LVT entry is masked.
    
    This would usually manifest when Xen is being shut down, as that's
    where disconnect_bsp_APIC is called:
    
    (XEN) APIC error on CPU0: 40(00)
    
    Fix this by calling clear_local_APIC prior to setting the LVT LINT
    registers which already clear LVT LINT0, and hence the troublesome
    write can be avoided as the register is already cleared.
    
    Reported-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
    Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
(qemu changes not included)

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