* Re: [PATCH net-next V4] net/mlx5: Improve write-combining test reliability for ARM64 Grace CPUs
[not found] <1758528951-817323-1-git-send-email-tariqt@nvidia.com>
@ 2025-09-23 7:19 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-09-23 7:19 UTC (permalink / raw)
To: Tariq Toukan, Catalin Marinas, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, Andrew Lunn, David S. Miller
Cc: oe-kbuild-all, netdev, Saeed Mahameed, Leon Romanovsky,
Tariq Toukan, Mark Bloch, linux-rdma, linux-kernel, Gal Pressman,
Jason Gunthorpe, Michael Guralnik, Moshe Shemesh, Will Deacon,
Alexander Gordeev, Andrew Morton, Linux Memory Management List,
Christian Borntraeger, Borislav Petkov, Dave Hansen,
Gerald Schaefer, Vasily Gorbik, Heiko Carstens, H. Peter Anvin,
Justin Stitt, linux-s390
Hi Tariq,
kernel test robot noticed the following build errors:
[auto build test ERROR on 312e6f7676e63bbb9b81e5c68e580a9f776cc6f0]
url: https://github.com/intel-lab-lkp/linux/commits/Tariq-Toukan/net-mlx5-Improve-write-combining-test-reliability-for-ARM64-Grace-CPUs/20250922-161859
base: 312e6f7676e63bbb9b81e5c68e580a9f776cc6f0
patch link: https://lore.kernel.org/r/1758528951-817323-1-git-send-email-tariqt%40nvidia.com
patch subject: [PATCH net-next V4] net/mlx5: Improve write-combining test reliability for ARM64 Grace CPUs
config: arm-allmodconfig (https://download.01.org/0day-ci/archive/20250923/202509231437.exOuF9vQ-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 15.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250923/202509231437.exOuF9vQ-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/202509231437.exOuF9vQ-lkp@intel.com/
All errors (new ones prefixed by >>):
In function 'mlx5_iowrite64_copy',
inlined from 'mlx5_wc_post_nop' at drivers/net/ethernet/mellanox/mlx5/core/wc.c:317:2:
>> drivers/net/ethernet/mellanox/mlx5/core/wc.c:268:17: error: unknown register name 'v0' in 'asm'
268 | asm volatile
| ^~~
vim +268 drivers/net/ethernet/mellanox/mlx5/core/wc.c
261
262 static void mlx5_iowrite64_copy(struct mlx5_wc_sq *sq, __be32 mmio_wqe[16],
263 size_t mmio_wqe_size, unsigned int offset)
264 {
265 #ifdef CONFIG_KERNEL_MODE_NEON
266 if (cpu_has_neon()) {
267 kernel_neon_begin();
> 268 asm volatile
269 (".arch_extension simd;\n\t"
270 "ld1 {v0.16b, v1.16b, v2.16b, v3.16b}, [%0]\n\t"
271 "st1 {v0.16b, v1.16b, v2.16b, v3.16b}, [%1]"
272 :
273 : "r"(mmio_wqe), "r"(sq->bfreg.map + offset)
274 : "memory", "v0", "v1", "v2", "v3");
275 kernel_neon_end();
276 return;
277 }
278 #endif
279 __iowrite64_copy(sq->bfreg.map + offset, mmio_wqe,
280 mmio_wqe_size / 8);
281 }
282
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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