[sudeep-holla:b4/plat2faux_dev 3/10] arch/arm64/include/asm/archrandom.h:93:undefined reference to `smccc_trng_available'

[sudeep-holla:b4/plat2faux_dev 3/10] arch/arm64/include/asm/archrandom.h:93:undefined reference to `smccc_trng_available'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/sudeep.holla/linux.git b4/plat2faux_dev
head:   311808e89f691de1648385823ca10d4bcdd72ea0
commit: 956d963234312b4891386248ca1feef218a9fb3b [3/10] hwrng: arm-smccc-trng - transition to the faux device interface
config: arm64-randconfig-001-20250317 (https://download.01.org/0day-ci/archive/20250318/202503180130.eZCLxXqV-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250318/202503180130.eZCLxXqV-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/202503180130.eZCLxXqV-lkp@intel.com/

All errors (new ones prefixed by >>):

   aarch64-linux-ld: drivers/char/random.o: in function `arch_get_random_seed_longs':
>> arch/arm64/include/asm/archrandom.h:93:(.text+0x714): undefined reference to `smccc_trng_available'
   aarch64-linux-ld: drivers/char/random.o: relocation R_AARCH64_ADR_PREL_PG_HI21 against symbol `smccc_trng_available' which may bind externally can not be used when making a shared object; recompile with -fPIC
>> arch/arm64/include/asm/archrandom.h:93:(.text+0x714): dangerous relocation: unsupported relocation
>> aarch64-linux-ld: arch/arm64/include/asm/archrandom.h:93:(.text+0x71c): undefined reference to `smccc_trng_available'


vim +93 arch/arm64/include/asm/archrandom.h

1a50ec0b3b2e9a Richard Henderson  2020-01-21   81  
d349ab99eec7ab Jason A. Donenfeld 2022-07-17   82  static inline size_t __must_check arch_get_random_seed_longs(unsigned long *v, size_t max_longs)
1a50ec0b3b2e9a Richard Henderson  2020-01-21   83  {
d349ab99eec7ab Jason A. Donenfeld 2022-07-17   84  	if (!max_longs)
d349ab99eec7ab Jason A. Donenfeld 2022-07-17   85  		return 0;
38db987316a38a Andre Przywara     2021-01-06   86  
38db987316a38a Andre Przywara     2021-01-06   87  	/*
38db987316a38a Andre Przywara     2021-01-06   88  	 * We prefer the SMCCC call, since its semantics (return actual
38db987316a38a Andre Przywara     2021-01-06   89  	 * hardware backed entropy) is closer to the idea behind this
38db987316a38a Andre Przywara     2021-01-06   90  	 * function here than what even the RNDRSS register provides
38db987316a38a Andre Przywara     2021-01-06   91  	 * (the output of a pseudo RNG freshly seeded by a TRNG).
38db987316a38a Andre Przywara     2021-01-06   92  	 */
38db987316a38a Andre Przywara     2021-01-06  @93  	if (smccc_trng_available) {
d349ab99eec7ab Jason A. Donenfeld 2022-07-17   94  		struct arm_smccc_res res;
d349ab99eec7ab Jason A. Donenfeld 2022-07-17   95  
d349ab99eec7ab Jason A. Donenfeld 2022-07-17   96  		max_longs = min_t(size_t, 3, max_longs);
d349ab99eec7ab Jason A. Donenfeld 2022-07-17   97  		arm_smccc_1_1_invoke(ARM_SMCCC_TRNG_RND64, max_longs * 64, &res);
38db987316a38a Andre Przywara     2021-01-06   98  		if ((int)res.a0 >= 0) {
d349ab99eec7ab Jason A. Donenfeld 2022-07-17   99  			switch (max_longs) {
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  100  			case 3:
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  101  				*v++ = res.a1;
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  102  				fallthrough;
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  103  			case 2:
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  104  				*v++ = res.a2;
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  105  				fallthrough;
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  106  			case 1:
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  107  				*v++ = res.a3;
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  108  				break;
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  109  			}
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  110  			return max_longs;
38db987316a38a Andre Przywara     2021-01-06  111  		}
38db987316a38a Andre Przywara     2021-01-06  112  	}
38db987316a38a Andre Przywara     2021-01-06  113  
1a50ec0b3b2e9a Richard Henderson  2020-01-21  114  	/*
35bde68bba5413 Ard Biesheuvel     2022-01-13  115  	 * RNDRRS is not backed by an entropy source but by a DRBG that is
35bde68bba5413 Ard Biesheuvel     2022-01-13  116  	 * reseeded after each invocation. This is not a 100% fit but good
35bde68bba5413 Ard Biesheuvel     2022-01-13  117  	 * enough to implement this API if no other entropy source exists.
1a50ec0b3b2e9a Richard Henderson  2020-01-21  118  	 */
2c03e16f44993d Jason A. Donenfeld 2022-10-29  119  	if (__cpu_has_rng() && __arm64_rndrrs(v))
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  120  		return 1;
1a50ec0b3b2e9a Richard Henderson  2020-01-21  121  
d349ab99eec7ab Jason A. Donenfeld 2022-07-17  122  	return 0;
1a50ec0b3b2e9a Richard Henderson  2020-01-21  123  }
1a50ec0b3b2e9a Richard Henderson  2020-01-21  124  

:::::: The code at line 93 was first introduced by commit
:::::: 38db987316a38a3fe55ff7f5f4653fcb520a9d26 arm64: Add support for SMCCC TRNG entropy source

:::::: TO: Andre Przywara <andre.przywara@arm.com>
:::::: CC: Will Deacon <will@kernel.org>

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