Messages in this thread | | | Date | Sun, 14 Aug 2022 20:51:14 +0800 | From | kernel test robot <> | Subject | [stable:linux-5.15.y 5373/9027] arch/x86/kvm/hyperv.c:2185:5: warning: stack frame size (1036) exceeds limit (1024) in 'kvm_hv_hypercall' |
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Hi Vitaly,
FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-5.15.y head: 7217df81279835a7aee62a07aabb7b8fb8c766f2 commit: cb188e07105f2216f5efbefac95df4b6ce266906 [5373/9027] KVM: x86: hyper-v: HVCALL_SEND_IPI_EX is an XMM fast hypercall config: i386-allmodconfig (https://download.01.org/0day-ci/archive/20220814/202208142025.NHKErAjq-lkp@intel.com/config) compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 52cd00cabf479aa7eb6dbb063b7ba41ea57bce9e) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git/commit/?id=cb188e07105f2216f5efbefac95df4b6ce266906 git remote add stable https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git git fetch --no-tags stable linux-5.15.y git checkout cb188e07105f2216f5efbefac95df4b6ce266906 # save the config file mkdir build_dir && cp config build_dir/.config COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=i386 SHELL=/bin/bash arch/x86/kvm/
If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@intel.com>
All warnings (new ones prefixed by >>):
>> arch/x86/kvm/hyperv.c:2185:5: warning: stack frame size (1036) exceeds limit (1024) in 'kvm_hv_hypercall' [-Wframe-larger-than] int kvm_hv_hypercall(struct kvm_vcpu *vcpu) ^ 1 warning generated.
vim +/kvm_hv_hypercall +2185 arch/x86/kvm/hyperv.c
4ad81a91119df7 Vitaly Kuznetsov 2021-05-21 2184 e83d58874ba1de Andrey Smetanin 2015-07-03 @2185 int kvm_hv_hypercall(struct kvm_vcpu *vcpu) e83d58874ba1de Andrey Smetanin 2015-07-03 2186 { 4e62aa96d6e55c Vitaly Kuznetsov 2021-07-30 2187 struct kvm_vcpu_hv *hv_vcpu = to_hv_vcpu(vcpu); bd38b32053eb1c Siddharth Chandrasekaran 2021-05-26 2188 struct kvm_hv_hcall hc; bd38b32053eb1c Siddharth Chandrasekaran 2021-05-26 2189 u64 ret = HV_STATUS_SUCCESS; e83d58874ba1de Andrey Smetanin 2015-07-03 2190 e83d58874ba1de Andrey Smetanin 2015-07-03 2191 /* e83d58874ba1de Andrey Smetanin 2015-07-03 2192 * hypercall generates UD from non zero cpl and real mode e83d58874ba1de Andrey Smetanin 2015-07-03 2193 * per HYPER-V spec e83d58874ba1de Andrey Smetanin 2015-07-03 2194 */ b3646477d458fb Jason Baron 2021-01-14 2195 if (static_call(kvm_x86_get_cpl)(vcpu) != 0 || !is_protmode(vcpu)) { e83d58874ba1de Andrey Smetanin 2015-07-03 2196 kvm_queue_exception(vcpu, UD_VECTOR); 0d9c055eaaf41b Andrey Smetanin 2016-02-11 2197 return 1; e83d58874ba1de Andrey Smetanin 2015-07-03 2198 } e83d58874ba1de Andrey Smetanin 2015-07-03 2199
:::::: The code at line 2185 was first introduced by commit :::::: e83d58874ba1de74c13d3c6b05f95a023c860d25 kvm/x86: move Hyper-V MSR's/hypercall code into hyperv.c file
:::::: TO: Andrey Smetanin <asmetanin@virtuozzo.com> :::::: CC: Paolo Bonzini <pbonzini@redhat.com>
-- 0-DAY CI Kernel Test Service https://01.org/lkp
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