* [sean-jc:x86/dynamic_memslot_hashtable 7/7] arch/x86/kvm/x86.h:63:15: error: static assertion failed due to requirement '(sizeof (((struct kvm_memslots *)0)->id_hash) * 2 * 2) == (1024 * (1 + 1) * (1 + 1))': SIZE_OF_MEMSLOTS_HASHTABLE == (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CON...
@ 2026-06-18 19:49 kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2026-06-18 19:49 UTC (permalink / raw)
To: Sean Christopherson; +Cc: llvm, oe-kbuild-all
tree: https://github.com/sean-jc/linux x86/dynamic_memslot_hashtable
head: e6c91f158091040c1e79a7dc9b8401235ae066b5
commit: e6c91f158091040c1e79a7dc9b8401235ae066b5 [7/7] KVM: Dynamically allocate memslot's id=>slot hash table
config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260618/202606182120.CIfEEL8K-lkp@intel.com/config)
compiler: clang version 22.1.8 (https://github.com/llvm/llvm-project ca7933e47d3a3451d81e72ac174dcb5aa28b59d1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260618/202606182120.CIfEEL8K-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/202606182120.CIfEEL8K-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from arch/x86/kvm/x86.c:21:
In file included from arch/x86/kvm/irq.h:19:
In file included from arch/x86/kvm/lapic.h:11:
In file included from arch/x86/kvm/hyperv.h:25:
>> arch/x86/kvm/x86.h:63:15: error: static assertion failed due to requirement '(sizeof (((struct kvm_memslots *)0)->id_hash) * 2 * 2) == (1024 * (1 + 1) * (1 + 1))': SIZE_OF_MEMSLOTS_HASHTABLE == (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CONFIG_KVM_SMM)))
63 | static_assert(SIZE_OF_MEMSLOTS_HASHTABLE ==
| ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
64 | (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CONFIG_KVM_SMM))));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/kvm/x86.h:60:2: note: expanded from macro 'SIZE_OF_MEMSLOTS_HASHTABLE'
60 | (sizeof(((struct kvm_memslots *)0)->id_hash) * 2 * KVM_MAX_NR_ADDRESS_SPACES)
| ^
include/linux/build_bug.h:79:50: note: expanded from macro 'static_assert'
79 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
| ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:80:56: note: expanded from macro '__static_assert'
80 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
arch/x86/kvm/x86.h:63:42: note: expression evaluates to '32 == 4096'
63 | static_assert(SIZE_OF_MEMSLOTS_HASHTABLE ==
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
64 | (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CONFIG_KVM_SMM))));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:79:50: note: expanded from macro 'static_assert'
79 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
| ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:80:56: note: expanded from macro '__static_assert'
80 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
In file included from arch/x86/kvm/x86.c:44:
include/linux/mman.h:157:9: warning: division by zero is undefined [-Wdivision-by-zero]
157 | _calc_vm_trans(flags, MAP_SYNC, VM_SYNC ) |
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mman.h:135:21: note: expanded from macro '_calc_vm_trans'
135 | : ((x) & (bit1)) / ((bit1) / (bit2))))
| ^ ~~~~~~~~~~~~~~~~~
include/linux/mman.h:159:9: warning: division by zero is undefined [-Wdivision-by-zero]
159 | _calc_vm_trans(flags, MAP_STACK, VM_NOHUGEPAGE) |
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/mman.h:135:21: note: expanded from macro '_calc_vm_trans'
135 | : ((x) & (bit1)) / ((bit1) / (bit2))))
| ^ ~~~~~~~~~~~~~~~~~
2 warnings and 1 error generated.
--
In file included from arch/x86/kvm/emulate.c:31:
>> arch/x86/kvm/x86.h:63:15: error: static assertion failed due to requirement '(sizeof (((struct kvm_memslots *)0)->id_hash) * 2 * 2) == (1024 * (1 + 1) * (1 + 1))': SIZE_OF_MEMSLOTS_HASHTABLE == (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CONFIG_KVM_SMM)))
63 | static_assert(SIZE_OF_MEMSLOTS_HASHTABLE ==
| ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
64 | (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CONFIG_KVM_SMM))));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/kvm/x86.h:60:2: note: expanded from macro 'SIZE_OF_MEMSLOTS_HASHTABLE'
60 | (sizeof(((struct kvm_memslots *)0)->id_hash) * 2 * KVM_MAX_NR_ADDRESS_SPACES)
| ^
include/linux/build_bug.h:79:50: note: expanded from macro 'static_assert'
79 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
| ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:80:56: note: expanded from macro '__static_assert'
80 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
arch/x86/kvm/x86.h:63:42: note: expression evaluates to '32 == 4096'
63 | static_assert(SIZE_OF_MEMSLOTS_HASHTABLE ==
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
64 | (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CONFIG_KVM_SMM))));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:79:50: note: expanded from macro 'static_assert'
79 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
| ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:80:56: note: expanded from macro '__static_assert'
80 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
1 error generated.
--
In file included from arch/x86/kvm/vmx/vmx.c:56:
In file included from arch/x86/kvm/vmx/capabilities.h:7:
In file included from arch/x86/kvm/vmx/../lapic.h:11:
In file included from arch/x86/kvm/vmx/../hyperv.h:25:
>> arch/x86/kvm/vmx/../x86.h:63:15: error: static assertion failed due to requirement '(sizeof (((struct kvm_memslots *)0)->id_hash) * 2 * 2) == (1024 * (1 + 1) * (1 + 1))': SIZE_OF_MEMSLOTS_HASHTABLE == (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CONFIG_KVM_SMM)))
63 | static_assert(SIZE_OF_MEMSLOTS_HASHTABLE ==
| ~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
64 | (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CONFIG_KVM_SMM))));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
arch/x86/kvm/vmx/../x86.h:60:2: note: expanded from macro 'SIZE_OF_MEMSLOTS_HASHTABLE'
60 | (sizeof(((struct kvm_memslots *)0)->id_hash) * 2 * KVM_MAX_NR_ADDRESS_SPACES)
| ^
include/linux/build_bug.h:79:50: note: expanded from macro 'static_assert'
79 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
| ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:80:56: note: expanded from macro '__static_assert'
80 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
arch/x86/kvm/vmx/../x86.h:63:42: note: expression evaluates to '32 == 4096'
63 | static_assert(SIZE_OF_MEMSLOTS_HASHTABLE ==
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~
64 | (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CONFIG_KVM_SMM))));
| ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:79:50: note: expanded from macro 'static_assert'
79 | #define static_assert(expr, ...) __static_assert(expr, ##__VA_ARGS__, #expr)
| ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/build_bug.h:80:56: note: expanded from macro '__static_assert'
80 | #define __static_assert(expr, msg, ...) _Static_assert(expr, msg)
| ^~~~
1 error generated.
vim +63 arch/x86/kvm/x86.h
65297341d8e15b Uros Bizjak 2021-08-09 58
ac777fbf064f81 Sean Christopherson 2025-05-22 59 #define SIZE_OF_MEMSLOTS_HASHTABLE \
ac777fbf064f81 Sean Christopherson 2025-05-22 60 (sizeof(((struct kvm_memslots *)0)->id_hash) * 2 * KVM_MAX_NR_ADDRESS_SPACES)
ac777fbf064f81 Sean Christopherson 2025-05-22 61
ac777fbf064f81 Sean Christopherson 2025-05-22 62 /* Sanity check the size of the memslot hash tables. */
ac777fbf064f81 Sean Christopherson 2025-05-22 @63 static_assert(SIZE_OF_MEMSLOTS_HASHTABLE ==
ac777fbf064f81 Sean Christopherson 2025-05-22 64 (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CONFIG_KVM_SMM))));
ac777fbf064f81 Sean Christopherson 2025-05-22 65
:::::: The code at line 63 was first introduced by commit
:::::: ac777fbf064f81b30e21f6d7023b6d0342a3fe1b KVM: x86: Use kvzalloc() to allocate VM struct
:::::: TO: Sean Christopherson <seanjc@google.com>
:::::: CC: Sean Christopherson <seanjc@google.com>
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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2026-06-18 19:49 [sean-jc:x86/dynamic_memslot_hashtable 7/7] arch/x86/kvm/x86.h:63:15: error: static assertion failed due to requirement '(sizeof (((struct kvm_memslots *)0)->id_hash) * 2 * 2) == (1024 * (1 + 1) * (1 + 1))': SIZE_OF_MEMSLOTS_HASHTABLE == (1024 * (1 + IS_ENABLED(CONFIG_X86_64)) * (1 + IS_ENABLED(CON kernel test robot
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