Re: [PATCH v4 10/18] KVM: arm64: nv: Describe trap behaviour of MDCR_EL2.HPMN

[kernel test robot <lkp@intel.com>]

Hi Oliver,

kernel test robot noticed the following build errors:

[auto build test ERROR on 8e929cb546ee42c9a61d24fae60605e9e3192354]

url:    https://github.com/intel-lab-lkp/linux/commits/Oliver-Upton/KVM-arm64-Extend-masking-facility-to-arbitrary-registers/20241026-023055
base:   8e929cb546ee42c9a61d24fae60605e9e3192354
patch link:    https://lore.kernel.org/r/20241025182354.3364124-11-oliver.upton%40linux.dev
patch subject: [PATCH v4 10/18] KVM: arm64: nv: Describe trap behaviour of MDCR_EL2.HPMN
config: arm64-randconfig-003-20241026 (https://download.01.org/0day-ci/archive/20241026/202410261855.fvLOtls9-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 5886454669c3c9026f7f27eab13509dd0241f2d6)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20241026/202410261855.fvLOtls9-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/202410261855.fvLOtls9-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from arch/arm64/kvm/emulate-nested.c:8:
   In file included from include/linux/kvm_host.h:16:
   In file included from include/linux/mm.h:2213:
   include/linux/vmstat.h:518:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     518 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> arch/arm64/kvm/emulate-nested.c:532:35: error: too many arguments to function call, expected single argument 'vcpu', have 2 arguments
     532 |         if (kvm_pmu_counter_is_hyp(vcpu, idx))
         |             ~~~~~~~~~~~~~~~~~~~~~~       ^~~
   include/kvm/arm_pmu.h:191:20: note: 'kvm_pmu_counter_is_hyp' declared here
     191 | static inline bool kvm_pmu_counter_is_hyp(struct kvm_vcpu *vcpu)
         |                    ^                      ~~~~~~~~~~~~~~~~~~~~~
   1 warning and 1 error generated.


vim +/vcpu +532 arch/arm64/kvm/emulate-nested.c

   509	
   510	static enum trap_behaviour check_mdcr_hpmn(struct kvm_vcpu *vcpu)
   511	{
   512		u32 sysreg = esr_sys64_to_sysreg(kvm_vcpu_get_esr(vcpu));
   513		unsigned int idx;
   514	
   515	
   516		switch (sysreg) {
   517		case SYS_PMEVTYPERn_EL0(0) ... SYS_PMEVTYPERn_EL0(30):
   518		case SYS_PMEVCNTRn_EL0(0) ... SYS_PMEVCNTRn_EL0(30):
   519			idx = (sys_reg_CRm(sysreg) & 0x3) << 3 | sys_reg_Op2(sysreg);
   520			break;
   521		case SYS_PMXEVTYPER_EL0:
   522		case SYS_PMXEVCNTR_EL0:
   523			idx = SYS_FIELD_GET(PMSELR_EL0, SEL,
   524					    __vcpu_sys_reg(vcpu, PMSELR_EL0));
   525			break;
   526		default:
   527			/* Someone used this trap helper for something else... */
   528			KVM_BUG_ON(1, vcpu->kvm);
   529			return BEHAVE_HANDLE_LOCALLY;
   530		}
   531	
 > 532		if (kvm_pmu_counter_is_hyp(vcpu, idx))
   533			return BEHAVE_FORWARD_RW | BEHAVE_IN_HOST_EL0;
   534	
   535		return BEHAVE_HANDLE_LOCALLY;
   536	}
   537	

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