[android-common:android12-5.10-2021-09 6729/10851] arch/arm64/kvm/hyp/include/hyp/switch.h:216:2: error: implicit declaration of function 'sve_cond_update_zcr_vq'

[android-common:android12-5.10-2021-09 6729/10851] arch/arm64/kvm/hyp/include/hyp/switch.h:216:2: 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 android12-5.10-2021-09
head:   0a07ca4e42c839ccc8cfcfa63078c9cb580c7d3b
commit: 1105b4d1cef4bc19ad20129a716194268c937eaf [6729/10851] BACKPORT: FROMGIT: KVM: arm64: Rework SVE host-save/guest-restore
config: arm64-buildonly-randconfig-r004-20211004 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project c0039de2953d15815448b4b3c3bafb45607781e0)
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 android12-5.10-2021-09
        git checkout 1105b4d1cef4bc19ad20129a716194268c937eaf
        # 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/vhe/switch.c:8:
>> 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/vhe/switch.c:227:17: warning: no previous prototype for function 'kvm_unexpected_el2_exception' [-Wmissing-prototypes]
   asmlinkage void kvm_unexpected_el2_exception(void)
                   ^
   arch/arm64/kvm/hyp/vhe/switch.c:227:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
   asmlinkage void kvm_unexpected_el2_exception(void)
              ^
              static 
   1 warning and 1 error generated.
--
   In file included from arch/arm64/kvm/hyp/nvhe/switch.c:8:
>> 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/switch.c:282:17: warning: no previous prototype for function 'kvm_unexpected_el2_exception' [-Wmissing-prototypes]
   asmlinkage void kvm_unexpected_el2_exception(void)
                   ^
   arch/arm64/kvm/hyp/nvhe/switch.c:282:12: note: declare 'static' if the function is not intended to be used outside of this translation unit
   asmlinkage void kvm_unexpected_el2_exception(void)
              ^
              static 
   1 warning and 1 error generated.
--
   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: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 1 error generated.
--
   In file included from arch/arm64/kvm/hyp/nvhe/mem_protect.c:15:
>> 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);
           ^
   1 error generated.


vim +/sve_cond_update_zcr_vq +216 arch/arm64/kvm/hyp/include/hyp/switch.h

   213	
   214	static inline void __hyp_sve_restore_guest(struct kvm_vcpu *vcpu)
   215	{
 > 216		sve_cond_update_zcr_vq(vcpu_sve_max_vq(vcpu) - 1, SYS_ZCR_EL2);
   217		__sve_restore_state(vcpu_sve_pffr(vcpu),
   218				    &vcpu->arch.ctxt.fp_regs.fpsr);
   219		write_sysreg_el1(__vcpu_sys_reg(vcpu, ZCR_EL1), SYS_ZCR);
   220	}
   221	

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

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