[android-common:android12-5.10 1070/30000] arch/arm64/kvm/hyp/include/hyp/switch.h:216:9: error: implicit declaration of function 'sve_cond_update_zcr_vq'

[kernel test robot <lkp@intel.com>]

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:   de373c691bd1f70e66cd9b5b249f84ce02188f7f
commit: 1105b4d1cef4bc19ad20129a716194268c937eaf [1070/30000] BACKPORT: FROMGIT: KVM: arm64: Rework SVE host-save/guest-restore
config: arm64-randconfig-r062-20241112 (https://download.01.org/0day-ci/archive/20241112/202411122122.tEVcBCiP-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 14.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241112/202411122122.tEVcBCiP-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/202411122122.tEVcBCiP-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:216:9: 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
--
   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

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for DRM_MIPI_DSI
   Depends on [n]: HAS_IOMEM [=y] && DRM [=n]
   Selected by [y]:
   - GKI_HIDDEN_DRM_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_INTEL_NHLT
   Depends on [n]: SOUND [=n] && !UML && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y] && ACPI [=y]
   WARNING: unmet direct dependencies detected for DRM_KMS_CMA_HELPER
   Depends on [n]: HAS_IOMEM [=y] && DRM [=n]
   Selected by [y]:
   - GKI_HIDDEN_DRM_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_VMASTER
   Depends on [n]: SOUND [=n] && !UML && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_PCM_IEC958
   Depends on [n]: SOUND [=n] && !UML && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_SOC_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_JACK
   Depends on [n]: SOUND [=n] && !UML && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_JACK_INPUT_DEV
   Depends on [n]: SOUND [=n] && !UML && SND [=n] && SND_JACK [=y]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for SND_PCM_ELD
   Depends on [n]: SOUND [=n] && !UML && SND [=n]
   Selected by [y]:
   - GKI_HIDDEN_SND_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for HVC_DRIVER
   Depends on [n]: TTY [=n]
   Selected by [y]:
   - GKI_HIDDEN_VIRTUAL_CONFIGS [=y]
   WARNING: unmet direct dependencies detected for DRM_GEM_CMA_HELPER
   Depends on [n]: HAS_IOMEM [=y] && DRM [=n]
   Selected by [y]:
   - GKI_HIDDEN_DRM_CONFIGS [=y]


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	

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