linux-kernel - drivers/powercap/intel_rapl_tpmi.c:141:41: sparse: sparse: incorrect type in initializer (different address spaces)

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Message-ID: <202307191405.B2ozLURw-lkp@intel.com>
Date:   Wed, 19 Jul 2023 14:50:23 +0800
From:   kernel test robot <lkp@...el.com>
To:     Zhang Rui <rui.zhang@...el.com>
Cc:     oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        "Rafael J. Wysocki" <rjw@...ysocki.net>
Subject: drivers/powercap/intel_rapl_tpmi.c:141:41: sparse: sparse: incorrect
 type in initializer (different address spaces)

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   ccff6d117d8dc8d8d86e8695a75e5f8b01e573bf
commit: 9eef7f9da928c54149199e7b3215b82c2d595ccd powercap: intel_rapl: Introduce RAPL TPMI interface driver
date:   8 weeks ago
config: x86_64-randconfig-x061-20230719 (https://download.01.org/0day-ci/archive/20230719/202307191405.B2ozLURw-lkp@intel.com/config)
compiler: gcc-12 (Debian 12.2.0-14) 12.2.0
reproduce: (https://download.01.org/0day-ci/archive/20230719/202307191405.B2ozLURw-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/202307191405.B2ozLURw-lkp@intel.com/

sparse warnings: (new ones prefixed by >>)
>> drivers/powercap/intel_rapl_tpmi.c:141:41: sparse: sparse: incorrect type in initializer (different address spaces) @@     expected unsigned long long [usertype] *tpmi_rapl_regs @@     got void [noderef] __iomem * @@
   drivers/powercap/intel_rapl_tpmi.c:141:41: sparse:     expected unsigned long long [usertype] *tpmi_rapl_regs
   drivers/powercap/intel_rapl_tpmi.c:141:41: sparse:     got void [noderef] __iomem *

vim +141 drivers/powercap/intel_rapl_tpmi.c

   132	
   133	static int parse_one_domain(struct tpmi_rapl_package *trp, u32 offset)
   134	{
   135		u8 tpmi_domain_version;
   136		enum rapl_domain_type domain_type;
   137		enum tpmi_rapl_domain_type tpmi_domain_type;
   138		enum tpmi_rapl_register reg_index;
   139		enum rapl_domain_reg_id reg_id;
   140		int tpmi_domain_size, tpmi_domain_flags;
 > 141		u64 *tpmi_rapl_regs = trp->base + offset;
   142		u64 tpmi_domain_header = readq((void __iomem *)tpmi_rapl_regs);
   143	
   144		/* Domain Parent bits are ignored for now */
   145		tpmi_domain_version = tpmi_domain_header & 0xff;
   146		tpmi_domain_type = tpmi_domain_header >> 8 & 0xff;
   147		tpmi_domain_size = tpmi_domain_header >> 16 & 0xff;
   148		tpmi_domain_flags = tpmi_domain_header >> 32 & 0xffff;
   149	
   150		if (tpmi_domain_version != TPMI_RAPL_VERSION) {
   151			pr_warn(FW_BUG "Unsupported version:%d\n", tpmi_domain_version);
   152			return -ENODEV;
   153		}
   154	
   155		/* Domain size: in unit of 128 Bytes */
   156		if (tpmi_domain_size != 1) {
   157			pr_warn(FW_BUG "Invalid Domain size %d\n", tpmi_domain_size);
   158			return -EINVAL;
   159		}
   160	
   161		/* Unit register and Energy Status register are mandatory for each domain */
   162		if (!(tpmi_domain_flags & BIT(TPMI_RAPL_REG_UNIT)) ||
   163		    !(tpmi_domain_flags & BIT(TPMI_RAPL_REG_ENERGY_STATUS))) {
   164			pr_warn(FW_BUG "Invalid Domain flag 0x%x\n", tpmi_domain_flags);
   165			return -EINVAL;
   166		}
   167	
   168		switch (tpmi_domain_type) {
   169		case TPMI_RAPL_DOMAIN_PACKAGE:
   170			domain_type = RAPL_DOMAIN_PACKAGE;
   171			break;
   172		case TPMI_RAPL_DOMAIN_SYSTEM:
   173			domain_type = RAPL_DOMAIN_PLATFORM;
   174			break;
   175		case TPMI_RAPL_DOMAIN_MEMORY:
   176			domain_type = RAPL_DOMAIN_DRAM;
   177			break;
   178		default:
   179			pr_warn(FW_BUG "Unsupported Domain type %d\n", tpmi_domain_type);
   180			return -EINVAL;
   181		}
   182	
   183		if (trp->priv.regs[domain_type][RAPL_DOMAIN_REG_UNIT]) {
   184			pr_warn(FW_BUG "Duplicate Domain type %d\n", tpmi_domain_type);
   185			return -EINVAL;
   186		}
   187	
   188		reg_index = TPMI_RAPL_REG_HEADER;
   189		while (++reg_index != TPMI_RAPL_REG_MAX) {
   190			if (!(tpmi_domain_flags & BIT(reg_index)))
   191				continue;
   192	
   193			switch (reg_index) {
   194			case TPMI_RAPL_REG_UNIT:
   195				reg_id = RAPL_DOMAIN_REG_UNIT;
   196				break;
   197			case TPMI_RAPL_REG_PL1:
   198				reg_id = RAPL_DOMAIN_REG_LIMIT;
   199				trp->priv.limits[domain_type] |= BIT(POWER_LIMIT1);
   200				break;
   201			case TPMI_RAPL_REG_PL2:
   202				reg_id = RAPL_DOMAIN_REG_PL2;
   203				trp->priv.limits[domain_type] |= BIT(POWER_LIMIT2);
   204				break;
   205			case TPMI_RAPL_REG_PL4:
   206				reg_id = RAPL_DOMAIN_REG_PL4;
   207				trp->priv.limits[domain_type] |= BIT(POWER_LIMIT4);
   208				break;
   209			case TPMI_RAPL_REG_ENERGY_STATUS:
   210				reg_id = RAPL_DOMAIN_REG_STATUS;
   211				break;
   212			case TPMI_RAPL_REG_PERF_STATUS:
   213				reg_id = RAPL_DOMAIN_REG_PERF;
   214				break;
   215			case TPMI_RAPL_REG_POWER_INFO:
   216				reg_id = RAPL_DOMAIN_REG_INFO;
   217				break;
   218			default:
   219				continue;
   220			}
   221			trp->priv.regs[domain_type][reg_id] = (u64)&tpmi_rapl_regs[reg_index];
   222		}
   223	
   224		return 0;
   225	}
   226	

-- 
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https://github.com/intel/lkp-tests/wiki