[intel-tdx:kvm-upstream-workaround 142/314] arch/arm64/kvm/../../../virt/kvm/kvm_main.c:4971:1: warning: unused label 'arch_vm_ioctl'

From: kernel test robot
Date: Tue Aug 23 2022 - 07:35:15 EST

tree: https://github.com/intel/tdx.git kvm-upstream-workaround
head: 552dd80c48f67ca01bcdd10667e0c11efd375177
commit: 303b911206dd2a12b1a4fdee94044dc5a6fa36a3 [142/314] KVM: Register/unregister the guest private memory regions
config: arm64-randconfig-r011-20220823 (https://download.01.org/0day-ci/archive/20220823/202208231700.N4apTibb-lkp@xxxxxxxxx/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project b04d01c009d7f66bcca9138d2ce40999eedf104d)
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
# install arm64 cross compiling tool for clang build
# apt-get install binutils-aarch64-linux-gnu
# https://github.com/intel/tdx/commit/303b911206dd2a12b1a4fdee94044dc5a6fa36a3
git remote add intel-tdx https://github.com/intel/tdx.git
git fetch --no-tags intel-tdx kvm-upstream-workaround
git checkout 303b911206dd2a12b1a4fdee94044dc5a6fa36a3
# 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=arm64 SHELL=/bin/bash

If you fix the issue, kindly add following tag where applicable
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All warnings (new ones prefixed by >>):

>> arch/arm64/kvm/../../../virt/kvm/kvm_main.c:4971:1: warning: unused label 'arch_vm_ioctl' [-Wunused-label]
arch_vm_ioctl:
^~~~~~~~~~~~~~
1 warning generated.


vim +/arch_vm_ioctl +4971 arch/arm64/kvm/../../../virt/kvm/kvm_main.c

4747
4748 static long kvm_vm_ioctl(struct file *filp,
4749 unsigned int ioctl, unsigned long arg)
4750 {
4751 struct kvm *kvm = filp->private_data;
4752 void __user *argp = (void __user *)arg;
4753 int r;
4754
4755 if (kvm->mm != current->mm || kvm->vm_dead)
4756 return -EIO;
4757 switch (ioctl) {
4758 case KVM_CREATE_VCPU:
4759 r = kvm_vm_ioctl_create_vcpu(kvm, arg);
4760 break;
4761 case KVM_ENABLE_CAP: {
4762 struct kvm_enable_cap cap;
4763
4764 r = -EFAULT;
4765 if (copy_from_user(&cap, argp, sizeof(cap)))
4766 goto out;
4767 r = kvm_vm_ioctl_enable_cap_generic(kvm, &cap);
4768 break;
4769 }
4770 case KVM_SET_USER_MEMORY_REGION: {
4771 struct kvm_user_mem_region mem;
4772 unsigned long size;
4773 u32 flags;
4774
4775 kvm_sanity_check_user_mem_region_alias();
4776
4777 memset(&mem, 0, sizeof(mem));
4778
4779 r = -EFAULT;
4780
4781 if (get_user(flags,
4782 (u32 __user *)(argp + offsetof(typeof(mem), flags))))
4783 goto out;
4784
4785 if (flags & KVM_MEM_PRIVATE) {
4786 r = -EINVAL;
4787 goto out;
4788 }
4789
4790 size = sizeof(struct kvm_userspace_memory_region);
4791
4792 if (copy_from_user(&mem, argp, size))
4793 goto out;
4794
4795 r = -EINVAL;
4796 if ((flags ^ mem.flags) & KVM_MEM_PRIVATE)
4797 goto out;
4798
4799 r = kvm_vm_ioctl_set_memory_region(kvm, &mem);
4800 break;
4801 }
4802 #ifdef CONFIG_HAVE_KVM_PRIVATE_MEM
4803 case KVM_MEMORY_ENCRYPT_REG_REGION:
4804 case KVM_MEMORY_ENCRYPT_UNREG_REGION: {
4805 struct kvm_enc_region region;
4806
4807 if (!kvm_arch_private_mem_supported(kvm))
4808 goto arch_vm_ioctl;
4809
4810 r = -EFAULT;
4811 if (copy_from_user(&region, argp, sizeof(region)))
4812 goto out;
4813
4814 r = kvm_vm_ioctl_set_encrypted_region(kvm, ioctl, &region);
4815 break;
4816 }
4817 #endif
4818 case KVM_GET_DIRTY_LOG: {
4819 struct kvm_dirty_log log;
4820
4821 r = -EFAULT;
4822 if (copy_from_user(&log, argp, sizeof(log)))
4823 goto out;
4824 r = kvm_vm_ioctl_get_dirty_log(kvm, &log);
4825 break;
4826 }
4827 #ifdef CONFIG_KVM_GENERIC_DIRTYLOG_READ_PROTECT
4828 case KVM_CLEAR_DIRTY_LOG: {
4829 struct kvm_clear_dirty_log log;
4830
4831 r = -EFAULT;
4832 if (copy_from_user(&log, argp, sizeof(log)))
4833 goto out;
4834 r = kvm_vm_ioctl_clear_dirty_log(kvm, &log);
4835 break;
4836 }
4837 #endif
4838 #ifdef CONFIG_KVM_MMIO
4839 case KVM_REGISTER_COALESCED_MMIO: {
4840 struct kvm_coalesced_mmio_zone zone;
4841
4842 r = -EFAULT;
4843 if (copy_from_user(&zone, argp, sizeof(zone)))
4844 goto out;
4845 r = kvm_vm_ioctl_register_coalesced_mmio(kvm, &zone);
4846 break;
4847 }
4848 case KVM_UNREGISTER_COALESCED_MMIO: {
4849 struct kvm_coalesced_mmio_zone zone;
4850
4851 r = -EFAULT;
4852 if (copy_from_user(&zone, argp, sizeof(zone)))
4853 goto out;
4854 r = kvm_vm_ioctl_unregister_coalesced_mmio(kvm, &zone);
4855 break;
4856 }
4857 #endif
4858 case KVM_IRQFD: {
4859 struct kvm_irqfd data;
4860
4861 r = -EFAULT;
4862 if (copy_from_user(&data, argp, sizeof(data)))
4863 goto out;
4864 r = kvm_irqfd(kvm, &data);
4865 break;
4866 }
4867 case KVM_IOEVENTFD: {
4868 struct kvm_ioeventfd data;
4869
4870 r = -EFAULT;
4871 if (copy_from_user(&data, argp, sizeof(data)))
4872 goto out;
4873 r = kvm_ioeventfd(kvm, &data);
4874 break;
4875 }
4876 #ifdef CONFIG_HAVE_KVM_MSI
4877 case KVM_SIGNAL_MSI: {
4878 struct kvm_msi msi;
4879
4880 r = -EFAULT;
4881 if (copy_from_user(&msi, argp, sizeof(msi)))
4882 goto out;
4883 r = kvm_send_userspace_msi(kvm, &msi);
4884 break;
4885 }
4886 #endif
4887 #ifdef __KVM_HAVE_IRQ_LINE
4888 case KVM_IRQ_LINE_STATUS:
4889 case KVM_IRQ_LINE: {
4890 struct kvm_irq_level irq_event;
4891
4892 r = -EFAULT;
4893 if (copy_from_user(&irq_event, argp, sizeof(irq_event)))
4894 goto out;
4895
4896 r = kvm_vm_ioctl_irq_line(kvm, &irq_event,
4897 ioctl == KVM_IRQ_LINE_STATUS);
4898 if (r)
4899 goto out;
4900
4901 r = -EFAULT;
4902 if (ioctl == KVM_IRQ_LINE_STATUS) {
4903 if (copy_to_user(argp, &irq_event, sizeof(irq_event)))
4904 goto out;
4905 }
4906
4907 r = 0;
4908 break;
4909 }
4910 #endif
4911 #ifdef CONFIG_HAVE_KVM_IRQ_ROUTING
4912 case KVM_SET_GSI_ROUTING: {
4913 struct kvm_irq_routing routing;
4914 struct kvm_irq_routing __user *urouting;
4915 struct kvm_irq_routing_entry *entries = NULL;
4916
4917 r = -EFAULT;
4918 if (copy_from_user(&routing, argp, sizeof(routing)))
4919 goto out;
4920 r = -EINVAL;
4921 if (!kvm_arch_can_set_irq_routing(kvm))
4922 goto out;
4923 if (routing.nr > KVM_MAX_IRQ_ROUTES)
4924 goto out;
4925 if (routing.flags)
4926 goto out;
4927 if (routing.nr) {
4928 urouting = argp;
4929 entries = vmemdup_user(urouting->entries,
4930 array_size(sizeof(*entries),
4931 routing.nr));
4932 if (IS_ERR(entries)) {
4933 r = PTR_ERR(entries);
4934 goto out;
4935 }
4936 }
4937 r = kvm_set_irq_routing(kvm, entries, routing.nr,
4938 routing.flags);
4939 kvfree(entries);
4940 break;
4941 }
4942 #endif /* CONFIG_HAVE_KVM_IRQ_ROUTING */
4943 case KVM_CREATE_DEVICE: {
4944 struct kvm_create_device cd;
4945
4946 r = -EFAULT;
4947 if (copy_from_user(&cd, argp, sizeof(cd)))
4948 goto out;
4949
4950 r = kvm_ioctl_create_device(kvm, &cd);
4951 if (r)
4952 goto out;
4953
4954 r = -EFAULT;
4955 if (copy_to_user(argp, &cd, sizeof(cd)))
4956 goto out;
4957
4958 r = 0;
4959 break;
4960 }
4961 case KVM_CHECK_EXTENSION:
4962 r = kvm_vm_ioctl_check_extension_generic(kvm, arg);
4963 break;
4964 case KVM_RESET_DIRTY_RINGS:
4965 r = kvm_vm_ioctl_reset_dirty_pages(kvm);
4966 break;
4967 case KVM_GET_STATS_FD:
4968 r = kvm_vm_ioctl_get_stats_fd(kvm);
4969 break;
4970 default:
> 4971 arch_vm_ioctl:
4972 r = kvm_arch_vm_ioctl(filp, ioctl, arg);
4973 }
4974 out:
4975 return r;
4976 }
4977

--
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https://01.org/lkp