linux-kernel - [ammarfaizi2-block:google/android/kernel/common/android12-trusty-5.10 4724/5869] arch/arm64/kvm/hyp/include/hyp/switch.h:216:9: error: implicit declaration of function 'sve_cond_update_zcr

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Message-ID: <202201301345.a0dQdgTM-lkp@intel.com>
Date:   Sun, 30 Jan 2022 13:43:47 +0800
From:   kernel test robot <lkp@...el.com>
To:     Marc Zyngier <maz@...nel.org>
Cc:     kbuild-all@...ts.01.org, GNU/Weeb Mailing List <gwml@...weeb.org>,
        linux-kernel@...r.kernel.org, Quentin Perret <qperret@...gle.com>,
        Will Deacon <willdeacon@...gle.com>
Subject: [ammarfaizi2-block:google/android/kernel/common/android12-trusty-5.10
 4724/5869] arch/arm64/kvm/hyp/include/hyp/switch.h:216:9: error: implicit
 declaration of function 'sve_cond_update_zcr_vq'

Hi Marc,

FYI, the error/warning still remains.

tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android12-trusty-5.10
head:   94a36a1374e79fb3aa3539f8b99aa110fdc7b7a0
commit: 1105b4d1cef4bc19ad20129a716194268c937eaf [4724/5869] BACKPORT: FROMGIT: KVM: arm64: Rework SVE host-save/guest-restore
config: arm64-randconfig-c023-20220125 (https://download.01.org/0day-ci/archive/20220130/202201301345.a0dQdgTM-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.2.0
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
        # https://github.com/ammarfaizi2/linux-block/commit/1105b4d1cef4bc19ad20129a716194268c937eaf
        git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
        git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android12-trusty-5.10
        git checkout 1105b4d1cef4bc19ad20129a716194268c937eaf
        # save the config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/kvm/

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

All errors (new ones prefixed by >>):

   In file included from arch/arm64/kvm/hyp/nvhe/switch.c:8:
   arch/arm64/kvm/hyp/include/hyp/switch.h: In function '__hyp_sve_restore_guest':
>> arch/arm64/kvm/hyp/include/hyp/switch.h:216:9: error: implicit declaration of function 'sve_cond_update_zcr_vq' [-Werror=implicit-function-declaration]
     216 |         sve_cond_update_zcr_vq(vcpu_sve_max_vq(vcpu) - 1, SYS_ZCR_EL2);
         |         ^~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kvm/hyp/nvhe/switch.c: At top level:
   arch/arm64/kvm/hyp/nvhe/switch.c:282:17: warning: no previous prototype for 'kvm_unexpected_el2_exception' [-Wmissing-prototypes]
     282 | asmlinkage void kvm_unexpected_el2_exception(void)
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
--
   In file included from arch/arm64/kvm/hyp/nvhe/hyp-main.c:7:
   arch/arm64/kvm/hyp/include/hyp/switch.h: In function '__hyp_sve_restore_guest':
>> arch/arm64/kvm/hyp/include/hyp/switch.h:216:9: error: implicit declaration of function 'sve_cond_update_zcr_vq' [-Werror=implicit-function-declaration]
     216 |         sve_cond_update_zcr_vq(vcpu_sve_max_vq(vcpu) - 1, SYS_ZCR_EL2);
         |         ^~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kvm/hyp/nvhe/hyp-main.c: At top level:
   arch/arm64/kvm/hyp/nvhe/hyp-main.c:233:6: warning: no previous prototype for 'handle_trap' [-Wmissing-prototypes]
     233 | void handle_trap(struct kvm_cpu_context *host_ctxt)
         |      ^~~~~~~~~~~
   cc1: some warnings being treated as errors
--
   In file included from arch/arm64/kvm/hyp/nvhe/mem_protect.c:15:
   arch/arm64/kvm/hyp/include/hyp/switch.h: In function '__hyp_sve_restore_guest':
>> arch/arm64/kvm/hyp/include/hyp/switch.h:216:9: error: implicit declaration of function 'sve_cond_update_zcr_vq' [-Werror=implicit-function-declaration]
     216 |         sve_cond_update_zcr_vq(vcpu_sve_max_vq(vcpu) - 1, SYS_ZCR_EL2);
         |         ^~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
--
   In file included from arch/arm64/kvm/hyp/vhe/switch.c:8:
   arch/arm64/kvm/hyp/include/hyp/switch.h: In function '__hyp_sve_restore_guest':
>> arch/arm64/kvm/hyp/include/hyp/switch.h:216:9: error: implicit declaration of function 'sve_cond_update_zcr_vq' [-Werror=implicit-function-declaration]
     216 |         sve_cond_update_zcr_vq(vcpu_sve_max_vq(vcpu) - 1, SYS_ZCR_EL2);
         |         ^~~~~~~~~~~~~~~~~~~~~~
   arch/arm64/kvm/hyp/vhe/switch.c: At top level:
   arch/arm64/kvm/hyp/vhe/switch.c:227:17: warning: no previous prototype for 'kvm_unexpected_el2_exception' [-Wmissing-prototypes]
     227 | asmlinkage void kvm_unexpected_el2_exception(void)
         |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


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@lists.01.org