tree:   https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue
head:   3afb84581509b8d28979d15b5d727366efb3c8e5
commit: 078d47ee71d6a53657b5917ce1478f10bc173fa5 [149/154] KVM: x86/mmu: Protect the tdp_mmu_roots list with RCU
config: x86_64-allyesconfig (attached as .config)
compiler: gcc-9 (Debian 9.3.0-22) 9.3.0
reproduce (this is a W=1 build):
        # https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=078d47ee71d6a53657b5917ce1478f10bc173fa5
        git remote add kvm https://git.kernel.org/pub/scm/virt/kvm/kvm.git
        git fetch --no-tags kvm queue
        git checkout 078d47ee71d6a53657b5917ce1478f10bc173fa5
        # save the attached .config to linux build tree
        make W=1 W=1 ARCH=x86_64 

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 include/linux/rculist.h:11,
                    from include/linux/pid.h:5,
                    from include/linux/sched.h:14,
                    from include/linux/kvm_host.h:12,
                    from arch/x86/kvm/mmu.h:5,
                    from arch/x86/kvm/mmu/tdp_mmu.c:3:
   arch/x86/kvm/mmu/tdp_mmu.c: In function 'kvm_tdp_mmu_get_vcpu_root_hpa':
>> arch/x86/kvm/mmu/tdp_mmu.c:141:5: error: implicit declaration of function 'lockdep_is_help'; did you mean 'lockdep_is_held'? [-Werror=implicit-function-declaration]
     141 |     lockdep_is_help(&kvm->arch.tdp_mmu_pages_lock)) \
         |     ^~~~~~~~~~~~~~~
   include/linux/rcupdate.h:318:52: note: in definition of macro 'RCU_LOCKDEP_WARN'
     318 |   if (debug_lockdep_rcu_enabled() && !__warned && (c)) { \
         |                                                    ^
   include/linux/rculist.h:391:7: note: in expansion of macro '__list_check_rcu'
     391 |  for (__list_check_rcu(dummy, ## cond, 0),   \
         |       ^~~~~~~~~~~~~~~~
   arch/x86/kvm/mmu/tdp_mmu.c:139:2: note: in expansion of macro 'list_for_each_entry_rcu'
     139 |  list_for_each_entry_rcu(_root, &_kvm->arch.tdp_mmu_roots, link,  \
         |  ^~~~~~~~~~~~~~~~~~~~~~~
   arch/x86/kvm/mmu/tdp_mmu.c:188:2: note: in expansion of macro 'for_each_tdp_mmu_root'
     188 |  for_each_tdp_mmu_root(kvm, root, kvm_mmu_role_as_id(role)) {
         |  ^~~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +141 arch/x86/kvm/mmu/tdp_mmu.c

   124	
   125	/*
   126	 * Note: this iterator gets and puts references to the roots it iterates over.
   127	 * This makes it safe to release the MMU lock and yield within the loop, but
   128	 * if exiting the loop early, the caller must drop the reference to the most
   129	 * recent root. (Unless keeping a live reference is desirable.)
   130	 */
   131	#define for_each_tdp_mmu_root_yield_safe(_kvm, _root, _as_id)	\
   132		for (_root = tdp_mmu_next_root(_kvm, NULL);		\
   133		     _root;						\
   134		     _root = tdp_mmu_next_root(_kvm, _root))		\
   135			if (kvm_mmu_page_as_id(_root) != _as_id) {	\
   136			} else
   137	
   138	#define for_each_tdp_mmu_root(_kvm, _root, _as_id)				\
   139		list_for_each_entry_rcu(_root, &_kvm->arch.tdp_mmu_roots, link,		\
   140					lockdep_is_held_type(&kvm->mmu_lock, 0) ||	\
 > 141					lockdep_is_help(&kvm->arch.tdp_mmu_pages_lock))	\
   142			if (kvm_mmu_page_as_id(_root) != _as_id) {		\
   143			} else
   144	

---
0-DAY CI Kernel Test Service, Intel Corporation
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