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From: kernel test robot <lkp@intel.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: kbuild-all@lists.01.org, clang-built-linux@googlegroups.com,
	David Woodhouse <dwmw2@infradead.org>,
	Lu Baolu <baolu.lu@linux.intel.com>,
	Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
	Jerry Snitselaar <jsnitsel@redhat.com>, Qian Cai <cai@lca.pw>,
	iommu@lists.linux-foundation.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/2] iommu/amd: Move AMD IOMMU driver into subdirectory
Date: Wed, 10 Jun 2020 09:25:43 +0800	[thread overview]
Message-ID: <202006100916.8dmlS5sj%lkp@intel.com> (raw)
In-Reply-To: <20200609130303.26974-2-joro@8bytes.org>

[-- Attachment #1: Type: text/plain, Size: 14815 bytes --]

Hi Joerg,

I love your patch! Perhaps something to improve:

[auto build test WARNING on iommu/next]
[also build test WARNING on linus/master next-20200609]
[cannot apply to v5.7]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Joerg-Roedel/iommu-Move-Intel-and-AMD-drivers-into-their-own-subdirectory/20200609-210928
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: x86_64-randconfig-r026-20200607 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project bc2b70982be8f5250cd0082a7190f8b417bd4dfe)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> drivers/iommu/amd/init.c:3073:19: warning: no previous prototype for function 'get_amd_iommu' [-Wmissing-prototypes]
struct amd_iommu *get_amd_iommu(unsigned int idx)
^
drivers/iommu/amd/init.c:3073:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
struct amd_iommu *get_amd_iommu(unsigned int idx)
^
static
>> drivers/iommu/amd/init.c:3092:4: warning: no previous prototype for function 'amd_iommu_pc_get_max_banks' [-Wmissing-prototypes]
u8 amd_iommu_pc_get_max_banks(unsigned int idx)
^
drivers/iommu/amd/init.c:3092:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
u8 amd_iommu_pc_get_max_banks(unsigned int idx)
^
static
>> drivers/iommu/amd/init.c:3103:6: warning: no previous prototype for function 'amd_iommu_pc_supported' [-Wmissing-prototypes]
bool amd_iommu_pc_supported(void)
^
drivers/iommu/amd/init.c:3103:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
bool amd_iommu_pc_supported(void)
^
static
>> drivers/iommu/amd/init.c:3109:4: warning: no previous prototype for function 'amd_iommu_pc_get_max_counters' [-Wmissing-prototypes]
u8 amd_iommu_pc_get_max_counters(unsigned int idx)
^
drivers/iommu/amd/init.c:3109:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
u8 amd_iommu_pc_get_max_counters(unsigned int idx)
^
static
>> drivers/iommu/amd/init.c:3158:5: warning: no previous prototype for function 'amd_iommu_pc_get_reg' [-Wmissing-prototypes]
int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
^
drivers/iommu/amd/init.c:3158:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
^
static
>> drivers/iommu/amd/init.c:3167:5: warning: no previous prototype for function 'amd_iommu_pc_set_reg' [-Wmissing-prototypes]
int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
^
drivers/iommu/amd/init.c:3167:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
^
static
6 warnings generated.

vim +/get_amd_iommu +3073 drivers/iommu/amd/init.c

30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3072  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24 @3073  struct amd_iommu *get_amd_iommu(unsigned int idx)
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3074  {
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3075  	unsigned int i = 0;
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3076  	struct amd_iommu *iommu;
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3077  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3078  	for_each_iommu(iommu)
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3079  		if (i++ == idx)
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3080  			return iommu;
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3081  	return NULL;
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3082  }
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3083  EXPORT_SYMBOL(get_amd_iommu);
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3084  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3085  /****************************************************************************
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3086   *
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3087   * IOMMU EFR Performance Counter support functionality. This code allows
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3088   * access to the IOMMU PC functionality.
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3089   *
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3090   ****************************************************************************/
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3091  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24 @3092  u8 amd_iommu_pc_get_max_banks(unsigned int idx)
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3093  {
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3094  	struct amd_iommu *iommu = get_amd_iommu(idx);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3095  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3096  	if (iommu)
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3097  		return iommu->max_banks;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3098  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3099  	return 0;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3100  }
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3101  EXPORT_SYMBOL(amd_iommu_pc_get_max_banks);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3102  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05 @3103  bool amd_iommu_pc_supported(void)
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3104  {
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3105  	return amd_iommu_pc_present;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3106  }
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3107  EXPORT_SYMBOL(amd_iommu_pc_supported);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3108  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24 @3109  u8 amd_iommu_pc_get_max_counters(unsigned int idx)
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3110  {
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3111  	struct amd_iommu *iommu = get_amd_iommu(idx);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3112  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3113  	if (iommu)
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3114  		return iommu->max_counters;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3115  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3116  	return 0;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3117  }
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3118  EXPORT_SYMBOL(amd_iommu_pc_get_max_counters);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3119  
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3120  static int iommu_pc_get_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3121  				u8 fxn, u64 *value, bool is_write)
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3122  {
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3123  	u32 offset;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3124  	u32 max_offset_lim;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3125  
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3126  	/* Make sure the IOMMU PC resource is available */
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3127  	if (!amd_iommu_pc_present)
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3128  		return -ENODEV;
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3129  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3130  	/* Check for valid iommu and pc register indexing */
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3131  	if (WARN_ON(!iommu || (fxn > 0x28) || (fxn & 7)))
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3132  		return -ENODEV;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3133  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3134  	offset = (u32)(((0x40 | bank) << 12) | (cntr << 8) | fxn);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3135  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3136  	/* Limit the offset to the hw defined mmio region aperture */
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3137  	max_offset_lim = (u32)(((0x40 | iommu->max_banks) << 12) |
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3138  				(iommu->max_counters << 8) | 0x28);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3139  	if ((offset < MMIO_CNTR_REG_OFFSET) ||
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3140  	    (offset > max_offset_lim))
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3141  		return -EINVAL;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3142  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3143  	if (is_write) {
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3144  		u64 val = *value & GENMASK_ULL(47, 0);
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3145  
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3146  		writel((u32)val, iommu->mmio_base + offset);
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3147  		writel((val >> 32), iommu->mmio_base + offset + 4);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3148  	} else {
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3149  		*value = readl(iommu->mmio_base + offset + 4);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3150  		*value <<= 32;
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3151  		*value |= readl(iommu->mmio_base + offset);
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3152  		*value &= GENMASK_ULL(47, 0);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3153  	}
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3154  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3155  	return 0;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3156  }
38e45d02ea9f19 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2016-02-23  3157  
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24 @3158  int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
38e45d02ea9f19 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2016-02-23  3159  {
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3160  	if (!iommu)
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3161  		return -EINVAL;
38e45d02ea9f19 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2016-02-23  3162  
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3163  	return iommu_pc_get_set_reg(iommu, bank, cntr, fxn, value, false);
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3164  }
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3165  EXPORT_SYMBOL(amd_iommu_pc_get_reg);
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3166  
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24 @3167  int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)

:::::: The code at line 3073 was first introduced by commit
:::::: f5863a00e73c432b91e4efe1d68778b4ace6a892 x86/events/amd/iommu.c: Modify functions to query max banks and counters

:::::: TO: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
:::::: CC: Ingo Molnar <mingo@kernel.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

[-- Attachment #2: .config.gz --]
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WARNING: multiple messages have this Message-ID
From: kernel test robot <lkp@intel.com>
To: Joerg Roedel <joro@8bytes.org>
Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org,
	clang-built-linux@googlegroups.com,
	iommu@lists.linux-foundation.org,
	David Woodhouse <dwmw2@infradead.org>
Subject: Re: [PATCH v2 1/2] iommu/amd: Move AMD IOMMU driver into subdirectory
Date: Wed, 10 Jun 2020 09:25:43 +0800	[thread overview]
Message-ID: <202006100916.8dmlS5sj%lkp@intel.com> (raw)
In-Reply-To: <20200609130303.26974-2-joro@8bytes.org>

[-- Attachment #1: Type: text/plain, Size: 14815 bytes --]

Hi Joerg,

I love your patch! Perhaps something to improve:

[auto build test WARNING on iommu/next]
[also build test WARNING on linus/master next-20200609]
[cannot apply to v5.7]
[if your patch is applied to the wrong git tree, please drop us a note to help
improve the system. BTW, we also suggest to use '--base' option to specify the
base tree in git format-patch, please see https://stackoverflow.com/a/37406982]

url:    https://github.com/0day-ci/linux/commits/Joerg-Roedel/iommu-Move-Intel-and-AMD-drivers-into-their-own-subdirectory/20200609-210928
base:   https://git.kernel.org/pub/scm/linux/kernel/git/joro/iommu.git next
config: x86_64-randconfig-r026-20200607 (attached as .config)
compiler: clang version 11.0.0 (https://github.com/llvm/llvm-project bc2b70982be8f5250cd0082a7190f8b417bd4dfe)
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # install x86_64 cross compiling tool for clang build
        # apt-get install binutils-x86-64-linux-gnu
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> drivers/iommu/amd/init.c:3073:19: warning: no previous prototype for function 'get_amd_iommu' [-Wmissing-prototypes]
struct amd_iommu *get_amd_iommu(unsigned int idx)
^
drivers/iommu/amd/init.c:3073:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
struct amd_iommu *get_amd_iommu(unsigned int idx)
^
static
>> drivers/iommu/amd/init.c:3092:4: warning: no previous prototype for function 'amd_iommu_pc_get_max_banks' [-Wmissing-prototypes]
u8 amd_iommu_pc_get_max_banks(unsigned int idx)
^
drivers/iommu/amd/init.c:3092:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
u8 amd_iommu_pc_get_max_banks(unsigned int idx)
^
static
>> drivers/iommu/amd/init.c:3103:6: warning: no previous prototype for function 'amd_iommu_pc_supported' [-Wmissing-prototypes]
bool amd_iommu_pc_supported(void)
^
drivers/iommu/amd/init.c:3103:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
bool amd_iommu_pc_supported(void)
^
static
>> drivers/iommu/amd/init.c:3109:4: warning: no previous prototype for function 'amd_iommu_pc_get_max_counters' [-Wmissing-prototypes]
u8 amd_iommu_pc_get_max_counters(unsigned int idx)
^
drivers/iommu/amd/init.c:3109:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
u8 amd_iommu_pc_get_max_counters(unsigned int idx)
^
static
>> drivers/iommu/amd/init.c:3158:5: warning: no previous prototype for function 'amd_iommu_pc_get_reg' [-Wmissing-prototypes]
int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
^
drivers/iommu/amd/init.c:3158:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
^
static
>> drivers/iommu/amd/init.c:3167:5: warning: no previous prototype for function 'amd_iommu_pc_set_reg' [-Wmissing-prototypes]
int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
^
drivers/iommu/amd/init.c:3167:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
^
static
6 warnings generated.

vim +/get_amd_iommu +3073 drivers/iommu/amd/init.c

30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3072  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24 @3073  struct amd_iommu *get_amd_iommu(unsigned int idx)
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3074  {
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3075  	unsigned int i = 0;
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3076  	struct amd_iommu *iommu;
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3077  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3078  	for_each_iommu(iommu)
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3079  		if (i++ == idx)
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3080  			return iommu;
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3081  	return NULL;
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3082  }
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3083  EXPORT_SYMBOL(get_amd_iommu);
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3084  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3085  /****************************************************************************
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3086   *
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3087   * IOMMU EFR Performance Counter support functionality. This code allows
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3088   * access to the IOMMU PC functionality.
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3089   *
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3090   ****************************************************************************/
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3091  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24 @3092  u8 amd_iommu_pc_get_max_banks(unsigned int idx)
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3093  {
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3094  	struct amd_iommu *iommu = get_amd_iommu(idx);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3095  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3096  	if (iommu)
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3097  		return iommu->max_banks;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3098  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3099  	return 0;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3100  }
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3101  EXPORT_SYMBOL(amd_iommu_pc_get_max_banks);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3102  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05 @3103  bool amd_iommu_pc_supported(void)
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3104  {
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3105  	return amd_iommu_pc_present;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3106  }
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3107  EXPORT_SYMBOL(amd_iommu_pc_supported);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3108  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24 @3109  u8 amd_iommu_pc_get_max_counters(unsigned int idx)
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3110  {
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3111  	struct amd_iommu *iommu = get_amd_iommu(idx);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3112  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3113  	if (iommu)
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3114  		return iommu->max_counters;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3115  
f5863a00e73c43 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3116  	return 0;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3117  }
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3118  EXPORT_SYMBOL(amd_iommu_pc_get_max_counters);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3119  
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3120  static int iommu_pc_get_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr,
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3121  				u8 fxn, u64 *value, bool is_write)
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3122  {
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3123  	u32 offset;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3124  	u32 max_offset_lim;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3125  
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3126  	/* Make sure the IOMMU PC resource is available */
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3127  	if (!amd_iommu_pc_present)
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3128  		return -ENODEV;
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3129  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3130  	/* Check for valid iommu and pc register indexing */
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3131  	if (WARN_ON(!iommu || (fxn > 0x28) || (fxn & 7)))
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3132  		return -ENODEV;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3133  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3134  	offset = (u32)(((0x40 | bank) << 12) | (cntr << 8) | fxn);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3135  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3136  	/* Limit the offset to the hw defined mmio region aperture */
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3137  	max_offset_lim = (u32)(((0x40 | iommu->max_banks) << 12) |
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3138  				(iommu->max_counters << 8) | 0x28);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3139  	if ((offset < MMIO_CNTR_REG_OFFSET) ||
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3140  	    (offset > max_offset_lim))
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3141  		return -EINVAL;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3142  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3143  	if (is_write) {
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3144  		u64 val = *value & GENMASK_ULL(47, 0);
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3145  
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3146  		writel((u32)val, iommu->mmio_base + offset);
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3147  		writel((val >> 32), iommu->mmio_base + offset + 4);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3148  	} else {
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3149  		*value = readl(iommu->mmio_base + offset + 4);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3150  		*value <<= 32;
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3151  		*value |= readl(iommu->mmio_base + offset);
0a6d80c70b9150 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3152  		*value &= GENMASK_ULL(47, 0);
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3153  	}
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3154  
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3155  	return 0;
30861ddc9cca47 drivers/iommu/amd_iommu_init.c Steven L Kinney       2013-06-05  3156  }
38e45d02ea9f19 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2016-02-23  3157  
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24 @3158  int amd_iommu_pc_get_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)
38e45d02ea9f19 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2016-02-23  3159  {
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3160  	if (!iommu)
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3161  		return -EINVAL;
38e45d02ea9f19 drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2016-02-23  3162  
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3163  	return iommu_pc_get_set_reg(iommu, bank, cntr, fxn, value, false);
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3164  }
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3165  EXPORT_SYMBOL(amd_iommu_pc_get_reg);
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24  3166  
1650dfd1a9bcde drivers/iommu/amd_iommu_init.c Suravee Suthikulpanit 2017-02-24 @3167  int amd_iommu_pc_set_reg(struct amd_iommu *iommu, u8 bank, u8 cntr, u8 fxn, u64 *value)

:::::: The code at line 3073 was first introduced by commit
:::::: f5863a00e73c432b91e4efe1d68778b4ace6a892 x86/events/amd/iommu.c: Modify functions to query max banks and counters

:::::: TO: Suravee Suthikulpanit <Suravee.Suthikulpanit@amd.com>
:::::: CC: Ingo Molnar <mingo@kernel.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
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  reply	other threads:[~2020-06-10  2:01 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-06-09 13:03 [PATCH v2 0/2] iommu: Move Intel and AMD drivers into their own subdirectory Joerg Roedel
2020-06-09 13:03 ` Joerg Roedel
2020-06-09 13:03 ` [PATCH v2 1/2] iommu/amd: Move AMD IOMMU driver into subdirectory Joerg Roedel
2020-06-09 13:03   ` Joerg Roedel
2020-06-10  1:25   ` kernel test robot [this message]
2020-06-10  1:25     ` kernel test robot
2020-06-09 13:03 ` [PATCH v2 2/2] iommu/vt-d: Move Intel " Joerg Roedel
2020-06-09 13:03   ` Joerg Roedel
2020-06-10  2:09   ` Lu Baolu
2020-06-10  2:09     ` Lu Baolu

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