linux-kernel - arch/xtensa/boot/boot-elf/bootstrap.S:58: Error: invalid register 'atomctl' for 'wsr' instruction

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Message-ID: <202601130726.HBzz6OhQ-lkp@intel.com>
Date: Tue, 13 Jan 2026 07:52:28 +0800
From: kernel test robot <lkp@...el.com>
Cc: oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
 Rodrigo Vivi <rodrigo.vivi@...el.com>,
 Balasubramani Vivekanandan <balasubramani.vivekanandan@...el.com>
Subject: arch/xtensa/boot/boot-elf/bootstrap.S:58: Error: invalid
 register 'atomctl' for 'wsr' instruction

Hi Lucas,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   b71e635feefc852405b14620a7fc58c4c80c0f73
commit: b67e7422d229dead0dddaad7e7c05558f24d552f drm/xe: Fix build with CONFIG_MODULES=n
date:   4 months ago
config: xtensa-randconfig-r063-20260112 (https://download.01.org/0day-ci/archive/20260113/202601130726.HBzz6OhQ-lkp@intel.com/config)
compiler: xtensa-linux-gcc (GCC) 8.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260113/202601130726.HBzz6OhQ-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202601130726.HBzz6OhQ-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/xtensa/boot/boot-elf/bootstrap.S: Assembler messages:
>> arch/xtensa/boot/boot-elf/bootstrap.S:58: Error: invalid register 'atomctl' for 'wsr' instruction
   arch/xtensa/boot/boot-elf/bootstrap.S:68: Warning: value 0x1a0003000 truncated to 0xa0003000


vim +58 arch/xtensa/boot/boot-elf/bootstrap.S

e85e335f8ff615f Max Filippov 2012-12-03  42  
e85e335f8ff615f Max Filippov 2012-12-03  43  	.align  4
e85e335f8ff615f Max Filippov 2012-12-03  44  _SetupMMU:
09af39f649dac66 Max Filippov 2021-07-26  45  #if XCHAL_HAVE_WINDOWED
e85e335f8ff615f Max Filippov 2012-12-03  46  	movi	a0, 0
e85e335f8ff615f Max Filippov 2012-12-03  47  	wsr	a0, windowbase
e85e335f8ff615f Max Filippov 2012-12-03  48  	rsync
e85e335f8ff615f Max Filippov 2012-12-03  49  	movi	a0, 1
e85e335f8ff615f Max Filippov 2012-12-03  50  	wsr	a0, windowstart
e85e335f8ff615f Max Filippov 2012-12-03  51  	rsync
09af39f649dac66 Max Filippov 2021-07-26  52  #endif
e85e335f8ff615f Max Filippov 2012-12-03  53  	movi	a0, 0x1F
e85e335f8ff615f Max Filippov 2012-12-03  54  	wsr	a0, ps
e85e335f8ff615f Max Filippov 2012-12-03  55  	rsync
e85e335f8ff615f Max Filippov 2012-12-03  56  
e85e335f8ff615f Max Filippov 2012-12-03  57  #ifndef CONFIG_INITIALIZE_XTENSA_MMU_INSIDE_VMLINUX
e85e335f8ff615f Max Filippov 2012-12-03 @58  	initialize_mmu

:::::: The code at line 58 was first introduced by commit
:::::: e85e335f8ff615f74e29e09cc2599f095600114b xtensa: add MMU v3 support

:::::: TO: Max Filippov <jcmvbkbc@...il.com>
:::::: CC: Chris Zankel <chris@...kel.net>

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki