[intel-tdx:kvm-upstream-workaround 256/338] arch/x86/kvm/vmx/tdx.c:2547:6: warning: variable 'intr_info' set but not used

[intel-tdx:kvm-upstream-workaround 256/338] arch/x86/kvm/vmx/tdx.c:2547:6: warning: variable 'intr_info' set but not used

[kernel test robot]

tree:   https://github.com/intel/tdx.git kvm-upstream-workaround
head:   abaa3072a8763b7a6276df61d205bf33eb2f31a5
commit: de4a8b56e21e09b5d0cca6f846b97837a41aa37c [256/338] KVM: TDX: Basic exception injection support for DEBUG TDX guest
config: x86_64-allmodconfig (https://download.01.org/0day-ci/archive/20230430/202304301527.MTE2GE63-lkp@intel.com/config)
compiler: clang version 14.0.6 (https://github.com/llvm/llvm-project f28c006a5895fc0e329fe15fead81e37457cb1d1)
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://github.com/intel/tdx/commit/de4a8b56e21e09b5d0cca6f846b97837a41aa37c
        git remote add intel-tdx https://github.com/intel/tdx.git
        git fetch --no-tags intel-tdx kvm-upstream-workaround
        git checkout de4a8b56e21e09b5d0cca6f846b97837a41aa37c
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 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>
| Link: https://lore.kernel.org/oe-kbuild-all/202304301527.MTE2GE63-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> arch/x86/kvm/vmx/tdx.c:2547:6: warning: variable 'intr_info' set but not used [-Wunused-but-set-variable]
           u32 intr_info;
               ^
   1 warning generated.


vim +/intr_info +2547 arch/x86/kvm/vmx/tdx.c

  2532	
  2533	void tdx_set_gdt(struct kvm_vcpu *vcpu, struct desc_ptr *dt)
  2534	{
  2535		if (!is_debug_td(vcpu))
  2536			return;
  2537	
  2538		td_vmcs_write32(to_tdx(vcpu), GUEST_GDTR_LIMIT, dt->size);
  2539		td_vmcs_write64(to_tdx(vcpu), GUEST_GDTR_BASE, dt->address);
  2540	}
  2541	void tdx_inject_exception(struct kvm_vcpu *vcpu)
  2542	{
  2543		struct vcpu_tdx *tdx;
  2544		unsigned int vector;
  2545		bool has_error_code;
  2546		u32 error_code;
> 2547		u32 intr_info;
  2548	
  2549		if (KVM_BUG_ON(!is_debug_td(vcpu), vcpu->kvm))
  2550			return;
  2551	
  2552		tdx = to_tdx(vcpu);
  2553		vector = vcpu->arch.exception.vector;
  2554		has_error_code = vcpu->arch.exception.has_error_code;
  2555		error_code = vcpu->arch.exception.error_code;
  2556		intr_info = vector | INTR_INFO_VALID_MASK;
  2557	
  2558		kvm_deliver_exception_payload(vcpu, &vcpu->arch.exception);
  2559	
  2560		if (has_error_code) {
  2561			td_vmcs_write32(tdx, VM_ENTRY_EXCEPTION_ERROR_CODE,
  2562					error_code);
  2563			intr_info |= INTR_INFO_DELIVER_CODE_MASK;
  2564		}
  2565	
  2566		if (kvm_exception_is_soft(vector)) {
  2567			td_vmcs_write32(tdx, VM_ENTRY_INSTRUCTION_LEN,
  2568					vcpu->arch.event_exit_inst_len);
  2569			intr_info |= INTR_TYPE_SOFT_EXCEPTION;
  2570		} else {
  2571			intr_info |= INTR_TYPE_HARD_EXCEPTION;
  2572		}
  2573	
  2574		pr_warn_once("Exception injection is not supported by TDX.\n");
  2575		/* td_vmcs_write32(tdx, VM_ENTRY_INTR_INFO_FIELD, intr_info);*/
  2576	}
  2577	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests