From: kernel test robot <lkp@intel.com>
To: cros-kernel-buildreports@googlegroups.com
Cc: oe-kbuild-all@lists.linux.dev
Subject: [android-common:android12-5.10 2/2] arch/arm64/kvm/hyp/include/hyp/switch.h:216:2: error: implicit declaration of function 'sve_cond_update_zcr_vq'
Date: Fri, 31 Jul 2026 22:17:47 +0800 [thread overview]
Message-ID: <202607312245.eegMzJWf-lkp@intel.com> (raw)
Hi Marc,
FYI, the error/warning was bisected to this commit, please ignore it if it's irrelevant.
tree: https://android.googlesource.com/kernel/common android12-5.10
head: 1290154c48656bd1012a837076a0fbe379330eb3
commit: 1105b4d1cef4bc19ad20129a716194268c937eaf [2/2] BACKPORT: FROMGIT: KVM: arm64: Rework SVE host-save/guest-restore
config: arm64-randconfig-003-20260731 (https://download.01.org/0day-ci/archive/20260731/202607312245.eegMzJWf-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 10.5.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260731/202607312245.eegMzJWf-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/202607312245.eegMzJWf-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: In function '__hyp_sve_restore_guest':
>> arch/arm64/kvm/hyp/include/hyp/switch.h:216:2: 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
--
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:216:2: 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/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:216:2: 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/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:216:2: 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
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
https://github.com/intel/lkp-tests/wiki
reply other threads:[~2026-07-31 14:18 UTC|newest]
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