linux-kernel - drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:3364:5: warning: stack frame size (2208) exceeds limit (2048) in 'psp_init_ta

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Date:   Fri, 30 Jun 2023 02:15:51 +0800
From:   kernel test robot <lkp@...el.com>
To:     Mario Limonciello <mario.limonciello@....com>
Cc:     llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
        linux-kernel@...r.kernel.org,
        Alex Deucher <alexander.deucher@....com>
Subject: drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:3364:5: warning: stack frame
 size (2208) exceeds limit (2048) in 'psp_init_ta_microcode'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   3a8a670eeeaa40d87bd38a587438952741980c18
commit: 994a97447e38182f530f246117a882c074d02af7 drm/amd: Parse both v1 and v2 TA microcode headers using same function
date:   6 months ago
config: arm64-randconfig-r026-20230629 (https://download.01.org/0day-ci/archive/20230630/202306300240.df8pU5Dy-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce: (https://download.01.org/0day-ci/archive/20230630/202306300240.df8pU5Dy-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/202306300240.df8pU5Dy-lkp@intel.com/

All warnings (new ones prefixed by >>):

   drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:3116:5: warning: stack frame size (2688) exceeds limit (2048) in 'psp_init_sos_microcode' [-Wframe-larger-than]
   int psp_init_sos_microcode(struct psp_context *psp,
       ^
   2603/2688 (96.84%) spills, 85/2688 (3.16%) variables
>> drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c:3364:5: warning: stack frame size (2208) exceeds limit (2048) in 'psp_init_ta_microcode' [-Wframe-larger-than]
   int psp_init_ta_microcode(struct psp_context *psp, const char *chip_name)
       ^
   2114/2208 (95.74%) spills, 94/2208 (4.26%) variables
   2 warnings generated.


vim +/psp_init_ta_microcode +3364 drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c

  3363	
> 3364	int psp_init_ta_microcode(struct psp_context *psp, const char *chip_name)
  3365	{
  3366		const struct common_firmware_header *hdr;
  3367		struct amdgpu_device *adev = psp->adev;
  3368		char fw_name[PSP_FW_NAME_LEN];
  3369		int err;
  3370	
  3371		snprintf(fw_name, sizeof(fw_name), "amdgpu/%s_ta.bin", chip_name);
  3372		err = request_firmware(&adev->psp.ta_fw, fw_name, adev->dev);
  3373		if (err)
  3374			return err;
  3375		err = amdgpu_ucode_validate(adev->psp.ta_fw);
  3376		if (err)
  3377			return err;
  3378	
  3379		hdr = (const struct common_firmware_header *)adev->psp.ta_fw->data;
  3380		switch (le16_to_cpu(hdr->header_version_major)) {
  3381		case 1:
  3382			err = parse_ta_v1_microcode(psp);
  3383			break;
  3384		case 2:
  3385			err = parse_ta_v2_microcode(psp);
  3386			break;
  3387		default:
  3388			dev_err(adev->dev, "unsupported TA header version\n");
  3389			err = -EINVAL;
  3390		}
  3391	
  3392		if (err) {
  3393			dev_err(adev->dev, "fail to initialize ta microcode\n");
  3394			release_firmware(adev->psp.ta_fw);
  3395			adev->psp.ta_fw = NULL;
  3396		}
  3397	
  3398		return err;
  3399	}
  3400	

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