[android-common:android12-5.10 6732/10834] arch/arm64/kvm/hyp/nvhe/hyp-main.c:245:3: error: implicit declaration of function 'sve_cond_update_zcr_vq'

[android-common:android12-5.10 6732/10834] arch/arm64/kvm/hyp/nvhe/hyp-main.c:245:3: error: implicit declaration of function 'sve_cond_update_zcr_vq'

[kernel test robot]

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Hi Marc,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android12-5.10
head:   96beb15eb2601e2ffe1daed95790f79aeef60d0b
commit: 194fd166b5d5f6694047b45dc409f9620a8a9646 [6732/10834] BACKPORT: FROMGIT: KVM: arm64: Trap host SVE accesses when the FPSIMD state is dirty
config: arm64-randconfig-r004-20210916 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c8b3d7d6d6de37af68b2f379d0e37304f78e115f)
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 arm64 cross compiling tool for clang build
        # apt-get install binutils-aarch64-linux-gnu
        git remote add android-common https://android.googlesource.com/kernel/common
        git fetch --no-tags android-common android12-5.10
        git checkout 194fd166b5d5f6694047b45dc409f9620a8a9646
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 ARCH=arm64 

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

All errors (new ones prefixed by >>):

   In file included from arch/arm64/kvm/hyp/nvhe/hyp-main.c:7:
   arch/arm64/kvm/hyp/include/hyp/switch.h:216:2: error: implicit declaration of function 'sve_cond_update_zcr_vq' [-Werror,-Wimplicit-function-declaration]
           sve_cond_update_zcr_vq(vcpu_sve_max_vq(vcpu) - 1, SYS_ZCR_EL2);
           ^
>> arch/arm64/kvm/hyp/nvhe/hyp-main.c:245:3: error: implicit declaration of function 'sve_cond_update_zcr_vq' [-Werror,-Wimplicit-function-declaration]
                   sve_cond_update_zcr_vq(ZCR_ELx_LEN_MASK, SYS_ZCR_EL2);
                   ^
   arch/arm64/kvm/hyp/nvhe/hyp-main.c:233:6: warning: no previous prototype for function 'handle_trap' [-Wmissing-prototypes]
   void handle_trap(struct kvm_cpu_context *host_ctxt)
        ^
   arch/arm64/kvm/hyp/nvhe/hyp-main.c:233:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
   void handle_trap(struct kvm_cpu_context *host_ctxt)
   ^
   static 
   1 warning and 2 errors generated.


vim +/sve_cond_update_zcr_vq +245 arch/arm64/kvm/hyp/nvhe/hyp-main.c

   232	
   233	void handle_trap(struct kvm_cpu_context *host_ctxt)
   234	{
   235		u64 esr = read_sysreg_el2(SYS_ESR);
   236	
   237		switch (ESR_ELx_EC(esr)) {
   238		case ESR_ELx_EC_HVC64:
   239			handle_host_hcall(host_ctxt);
   240			break;
   241		case ESR_ELx_EC_SMC64:
   242			handle_host_smc(host_ctxt);
   243			break;
   244		case ESR_ELx_EC_SVE:
 > 245			sve_cond_update_zcr_vq(ZCR_ELx_LEN_MASK, SYS_ZCR_EL2);

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

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