[android-common:android12-5.10 2/2] arch/arm64/kvm/fpsimd.c:129:5: error: implicit declaration of function 'sve_cond_update_zcr_vq'

Hi Marc,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android12-5.10
head:   1290154c48656bd1012a837076a0fbe379330eb3
commit: b0e15c8c44275afef4aacfb1560e38b974b02ac8 [2/2] FROMGIT: KVM: arm64: Save/restore SVE state for nVHE
config: arm64-randconfig-003-20260731 (https://download.01.org/0day-ci/archive/20260801/[email protected]/config)
compiler: aarch64-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260801/[email protected]/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 <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

   arch/arm64/kvm/fpsimd.c: In function 'kvm_arch_vcpu_put_fp':
>> arch/arm64/kvm/fpsimd.c:129:5: error: implicit declaration of function 'sve_cond_update_zcr_vq' [-Werror=implicit-function-declaration]
     129 |     sve_cond_update_zcr_vq(vcpu_sve_max_vq(vcpu) - 1,
         |     ^~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/sve_cond_update_zcr_vq +129 arch/arm64/kvm/fpsimd.c

   108	
   109	/*
   110	 * Write back the vcpu FPSIMD regs if they are dirty, and invalidate the
   111	 * cpu FPSIMD regs so that they can't be spuriously reused if this vcpu
   112	 * disappears and another task or vcpu appears that recycles the same
   113	 * struct fpsimd_state.
   114	 */
   115	void kvm_arch_vcpu_put_fp(struct kvm_vcpu *vcpu)
   116	{
   117		unsigned long flags;
   118		bool host_has_sve = system_supports_sve();
   119		bool guest_has_sve = vcpu_has_sve(vcpu);
   120	
   121		local_irq_save(flags);
   122	
   123		if (vcpu->arch.flags & KVM_ARM64_FP_ENABLED) {
   124			if (guest_has_sve) {
   125				__vcpu_sys_reg(vcpu, ZCR_EL1) = read_sysreg_el1(SYS_ZCR);
   126	
   127				/* Restore the VL that was saved when bound to the CPU */
   128				if (!has_vhe())
 > 129					sve_cond_update_zcr_vq(vcpu_sve_max_vq(vcpu) - 1,

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