Re: [PATCH 07/10] KVM: emulate: add AVX support to register fetch and writeback

[kernel test robot <lkp@intel.com>]

Hi Paolo,

kernel test robot noticed the following build errors:

[auto build test ERROR on v6.18-rc5]
[also build test ERROR on linus/master next-20251114]
[cannot apply to kvm/queue kvm/next mst-vhost/linux-next kvm/linux-next]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Paolo-Bonzini/KVM-emulate-add-MOVNTDQA/20251114-084216
base:   v6.18-rc5
patch link:    https://lore.kernel.org/r/20251114003633.60689-8-pbonzini%40redhat.com
patch subject: [PATCH 07/10] KVM: emulate: add AVX support to register fetch and writeback
config: i386-buildonly-randconfig-006-20251114 (https://download.01.org/0day-ci/archive/20251115/202511150213.HaLLVfkt-lkp@intel.com/config)
compiler: gcc-14 (Debian 14.2.0-19) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20251115/202511150213.HaLLVfkt-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202511150213.HaLLVfkt-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/x86/kvm/fpu.h: Assembler messages:
>> arch/x86/kvm/fpu.h:37: Error: bad register name `%ymm14'
>> arch/x86/kvm/fpu.h:36: Error: bad register name `%ymm13'
>> arch/x86/kvm/fpu.h:38: Error: bad register name `%ymm15'
>> arch/x86/kvm/fpu.h:35: Error: bad register name `%ymm12'
>> arch/x86/kvm/fpu.h:34: Error: bad register name `%ymm11'
>> arch/x86/kvm/fpu.h:33: Error: bad register name `%ymm10'
>> arch/x86/kvm/fpu.h:32: Error: bad register name `%ymm9'
>> arch/x86/kvm/fpu.h:31: Error: bad register name `%ymm8'
   arch/x86/kvm/fpu.h:58: Error: bad register name `%ymm12'
   arch/x86/kvm/fpu.h:59: Error: bad register name `%ymm13'
   arch/x86/kvm/fpu.h:54: Error: bad register name `%ymm8'
   arch/x86/kvm/fpu.h:55: Error: bad register name `%ymm9'
   arch/x86/kvm/fpu.h:56: Error: bad register name `%ymm10'
   arch/x86/kvm/fpu.h:57: Error: bad register name `%ymm11'
   arch/x86/kvm/fpu.h:61: Error: bad register name `%ymm15'
   arch/x86/kvm/fpu.h:60: Error: bad register name `%ymm14'

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for I2C_K1
   Depends on [n]: I2C [=y] && HAS_IOMEM [=y] && (ARCH_SPACEMIT || COMPILE_TEST [=y]) && OF [=n]
   Selected by [y]:
   - MFD_SPACEMIT_P1 [=y] && HAS_IOMEM [=y] && (ARCH_SPACEMIT || COMPILE_TEST [=y]) && I2C [=y]


vim +37 arch/x86/kvm/fpu.h

    19	
    20	static inline void _kvm_read_avx_reg(int reg, avx256_t *data)
    21	{
    22		switch (reg) {
    23		case 0:  asm("vmovdqa %%ymm0,  %0" : "=m"(*data)); break;
    24		case 1:  asm("vmovdqa %%ymm1,  %0" : "=m"(*data)); break;
    25		case 2:  asm("vmovdqa %%ymm2,  %0" : "=m"(*data)); break;
    26		case 3:  asm("vmovdqa %%ymm3,  %0" : "=m"(*data)); break;
    27		case 4:  asm("vmovdqa %%ymm4,  %0" : "=m"(*data)); break;
    28		case 5:  asm("vmovdqa %%ymm5,  %0" : "=m"(*data)); break;
    29		case 6:  asm("vmovdqa %%ymm6,  %0" : "=m"(*data)); break;
    30		case 7:  asm("vmovdqa %%ymm7,  %0" : "=m"(*data)); break;
  > 31		case 8:  asm("vmovdqa %%ymm8,  %0" : "=m"(*data)); break;
  > 32		case 9:  asm("vmovdqa %%ymm9,  %0" : "=m"(*data)); break;
  > 33		case 10: asm("vmovdqa %%ymm10, %0" : "=m"(*data)); break;
  > 34		case 11: asm("vmovdqa %%ymm11, %0" : "=m"(*data)); break;
  > 35		case 12: asm("vmovdqa %%ymm12, %0" : "=m"(*data)); break;
  > 36		case 13: asm("vmovdqa %%ymm13, %0" : "=m"(*data)); break;
  > 37		case 14: asm("vmovdqa %%ymm14, %0" : "=m"(*data)); break;
  > 38		case 15: asm("vmovdqa %%ymm15, %0" : "=m"(*data)); break;
    39		default: BUG();
    40		}
    41	}
    42	

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