[openeuler:OLK-5.10 21492/30000] arch/arm64/kvm/reset.c:102:34: error: implicit declaration of function 'sve_max_virtualisable_vl'

[openeuler:OLK-5.10 21492/30000] arch/arm64/kvm/reset.c:102:34: error: implicit declaration of function 'sve_max_virtualisable_vl'

[kernel test robot]

Hi Mark,

FYI, the error/warning still remains.

tree:   https://gitee.com/openeuler/kernel.git OLK-5.10
head:   5faf5aae71283199f69c2a60ed91ab2847f3ffd8
commit: 68da302c8ae30331c8917f1dc7b0f1682f696d71 [21492/30000] arm64/sve: Put system wide vector length information into structs
config: arm64-randconfig-003-20241024 (https://download.01.org/0day-ci/archive/20241024/202410241303.wTIeIXFm-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.1.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241024/202410241303.wTIeIXFm-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/202410241303.wTIeIXFm-lkp@intel.com/

All errors (new ones prefixed by >>):

   arch/arm64/kvm/reset.c: In function 'kvm_arm_init_sve':
>> arch/arm64/kvm/reset.c:102:34: error: implicit declaration of function 'sve_max_virtualisable_vl' [-Werror=implicit-function-declaration]
     102 |                 kvm_sve_max_vl = sve_max_virtualisable_vl();
         |                                  ^~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/sve_max_virtualisable_vl +102 arch/arm64/kvm/reset.c

    98	
    99	int kvm_arm_init_sve(void)
   100	{
   101		if (system_supports_sve()) {
 > 102			kvm_sve_max_vl = sve_max_virtualisable_vl();
   103	
   104			/*
   105			 * The get_sve_reg()/set_sve_reg() ioctl interface will need
   106			 * to be extended with multiple register slice support in
   107			 * order to support vector lengths greater than
   108			 * SVE_VL_ARCH_MAX:
   109			 */
   110			if (WARN_ON(kvm_sve_max_vl > SVE_VL_ARCH_MAX))
   111				kvm_sve_max_vl = SVE_VL_ARCH_MAX;
   112	
   113			/*
   114			 * Don't even try to make use of vector lengths that
   115			 * aren't available on all CPUs, for now:
   116			 */
   117			if (kvm_sve_max_vl < sve_max_vl())
   118				pr_warn("KVM: SVE vector length for guests limited to %u bytes\n",
   119					kvm_sve_max_vl);
   120		}
   121	
   122		return 0;
   123	}
   124	

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