[android-common:android15-6.6-partner_predev 23/81] arch/x86/kvm/../../../virt/kvm/vfio.c:394:8: error: call to undeclared function 'kvm_call_hyp_nvhe'; ISO C99 and later do not support implicit function declarations

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

Hi Mostafa,

FYI, the error/warning still remains.

tree:   https://android.googlesource.com/kernel/common android15-6.6-partner_predev
head:   189fb017ecf5ae2222e37e4461dc2369022a9b99
commit: ce9964a039a624643c11ab2dab631b29c81d865f [23/81] ANDROID: kvm/vfio: Add pviommu group and attach function
config: i386-buildonly-randconfig-001-20241206 (https://download.01.org/0day-ci/archive/20241206/202412061436.BFNE5ITW-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241206/202412061436.BFNE5ITW-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/202412061436.BFNE5ITW-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/x86/kvm/../../../virt/kvm/vfio.c:12:
   In file included from include/linux/kvm_host.h:16:
   In file included from include/linux/mm.h:2224:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
   In file included from arch/x86/kvm/../../../virt/kvm/vfio.c:12:
   include/linux/kvm_host.h:1575:6: warning: no previous prototype for function 'kvm_arch_reclaim_device' [-Wmissing-prototypes]
    1575 | void kvm_arch_reclaim_device(struct device *dev)
         |      ^
   include/linux/kvm_host.h:1575:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1575 | void kvm_arch_reclaim_device(struct device *dev)
         | ^
         | static 
   include/linux/kvm_host.h:1579:6: warning: no previous prototype for function 'kvm_arch_reclaim_group' [-Wmissing-prototypes]
    1579 | void kvm_arch_reclaim_group(struct iommu_group *group)
         |      ^
   include/linux/kvm_host.h:1579:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
    1579 | void kvm_arch_reclaim_group(struct iommu_group *group)
         | ^
         | static 
   arch/x86/kvm/../../../virt/kvm/vfio.c:94:18: error: use of undeclared identifier 'vfio_file_get_device'; did you mean 'kvm_vfio_file_get_device'?
      94 |         fn = symbol_get(vfio_file_get_device);
         |                         ^~~~~~~~~~~~~~~~~~~~
         |                         kvm_vfio_file_get_device
   include/linux/module.h:814:40: note: expanded from macro 'symbol_get'
     814 | #define symbol_get(x) ({ extern typeof(x) x __attribute__((weak,visibility("hidden"))); &(x); })
         |                                        ^
   arch/x86/kvm/../../../virt/kvm/vfio.c:89:23: note: 'kvm_vfio_file_get_device' declared here
      89 | static struct device *kvm_vfio_file_get_device(struct file *file)
         |                       ^
>> arch/x86/kvm/../../../virt/kvm/vfio.c:394:8: error: call to undeclared function 'kvm_call_hyp_nvhe'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     394 |         ret = kvm_call_hyp_nvhe(__pkvm_pviommu_attach, dev->kvm, pviommu->fd);
         |               ^
>> arch/x86/kvm/../../../virt/kvm/vfio.c:394:26: error: use of undeclared identifier '__pkvm_pviommu_attach'; did you mean 'kvm_vfio_pviommu_attach'?
     394 |         ret = kvm_call_hyp_nvhe(__pkvm_pviommu_attach, dev->kvm, pviommu->fd);
         |                                 ^~~~~~~~~~~~~~~~~~~~~
         |                                 kvm_vfio_pviommu_attach
   arch/x86/kvm/../../../virt/kvm/vfio.c:376:12: note: 'kvm_vfio_pviommu_attach' declared here
     376 | static int kvm_vfio_pviommu_attach(struct kvm_device *dev)
         |            ^
   3 warnings and 3 errors generated.


vim +/kvm_call_hyp_nvhe +394 arch/x86/kvm/../../../virt/kvm/vfio.c

   375	
   376	static int kvm_vfio_pviommu_attach(struct kvm_device *dev)
   377	{
   378		int ret;
   379		struct kvm_pviommu *pviommu;
   380	
   381		pviommu = kmalloc(sizeof(*pviommu), GFP_KERNEL);
   382		if (!pviommu)
   383			return -ENOMEM;
   384	
   385		pviommu->dev = dev;
   386	
   387		ret = anon_inode_getfd("kvm-pviommu", &pviommu_fops, pviommu, O_CLOEXEC);
   388		if (ret < 0)
   389			goto out_free;
   390	
   391		pviommu->fd = ret;
   392	
   393		/* Create pvIOMMU with this ID. */
 > 394		ret = kvm_call_hyp_nvhe(__pkvm_pviommu_attach, dev->kvm, pviommu->fd);
   395		if (ret)
   396			goto out_free;
   397	
   398		return pviommu->fd;
   399	out_free:
   400		kfree(pviommu);
   401		return ret;
   402	}
   403	

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