Hi Nicholas, I love your patch! Yet something to improve: [auto build test ERROR on powerpc/next] [also build test ERROR on v5.12-rc5 next-20210401] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Nicholas-Piggin/KVM-PPC-Book3S-C-ify-the-P9-entry-exit-code/20210401-232743 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: powerpc64-randconfig-r033-20210402 (attached as .config) compiler: powerpc64-linux-gcc (GCC) 9.3.0 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/0day-ci/linux/commit/f2a35edda3ab6cba30fbfc362e163d5bc1e086d0 git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Nicholas-Piggin/KVM-PPC-Book3S-C-ify-the-P9-entry-exit-code/20210401-232743 git checkout f2a35edda3ab6cba30fbfc362e163d5bc1e086d0 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=powerpc64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): arch/powerpc/kvm/book3s_hv_interrupt.c: In function 'switch_mmu_to_guest_radix': arch/powerpc/kvm/book3s_hv_interrupt.c:61:46: error: 'struct kvm_vcpu_arch' has no member named 'nested' 61 | struct kvm_nested_guest *nested = vcpu->arch.nested; | ^ arch/powerpc/kvm/book3s_hv_interrupt.c:80:2: error: implicit declaration of function 'kvmppc_check_need_tlb_flush' [-Werror=implicit-function-declaration] 80 | kvmppc_check_need_tlb_flush(kvm, vc->pcpu, nested); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from arch/powerpc/include/asm/processor.h:11, from arch/powerpc/include/asm/thread_info.h:40, from include/linux/thread_info.h:58, from include/asm-generic/preempt.h:5, from ./arch/powerpc/include/generated/asm/preempt.h:1, from include/linux/preempt.h:78, from include/linux/percpu.h:6, from include/linux/context_tracking_state.h:5, from include/linux/hardirq.h:5, from include/linux/kvm_host.h:7, from arch/powerpc/kvm/book3s_hv_interrupt.c:3: arch/powerpc/kvm/book3s_hv_interrupt.c: In function 'switch_mmu_to_host_radix': arch/powerpc/kvm/book3s_hv_interrupt.c:88:28: error: 'struct kvm_arch' has no member named 'host_lpid' 88 | mtspr(SPRN_LPID, kvm->arch.host_lpid); | ^ arch/powerpc/include/asm/reg.h:1393:33: note: in definition of macro 'mtspr' 1393 | : "r" ((unsigned long)(v)) \ | ^ arch/powerpc/kvm/book3s_hv_interrupt.c:90:28: error: 'struct kvm_arch' has no member named 'host_lpcr' 90 | mtspr(SPRN_LPCR, kvm->arch.host_lpcr); | ^ arch/powerpc/include/asm/reg.h:1393:33: note: in definition of macro 'mtspr' 1393 | : "r" ((unsigned long)(v)) \ | ^ arch/powerpc/kvm/book3s_hv_interrupt.c: At top level: arch/powerpc/kvm/book3s_hv_interrupt.c:128:5: error: no previous prototype for 'kvmhv_vcpu_entry_p9' [-Werror=missing-prototypes] 128 | int kvmhv_vcpu_entry_p9(struct kvm_vcpu *vcpu, u64 time_limit, unsigned long lpcr) | ^~~~~~~~~~~~~~~~~~~ arch/powerpc/kvm/book3s_hv_interrupt.c: In function 'kvmhv_vcpu_entry_p9': >> arch/powerpc/kvm/book3s_hv_interrupt.c:170:25: error: 'struct kvmppc_host_state' has no member named 'host_purr'; did you mean 'host_r1'? 170 | local_paca->kvm_hstate.host_purr = mfspr(SPRN_PURR); | ^~~~~~~~~ | host_r1 >> arch/powerpc/kvm/book3s_hv_interrupt.c:171:25: error: 'struct kvmppc_host_state' has no member named 'host_spurr'; did you mean 'host_r1'? 171 | local_paca->kvm_hstate.host_spurr = mfspr(SPRN_SPURR); | ^~~~~~~~~~ | host_r1 In file included from arch/powerpc/include/asm/processor.h:11, from arch/powerpc/include/asm/thread_info.h:40, from include/linux/thread_info.h:58, from include/asm-generic/preempt.h:5, from ./arch/powerpc/include/generated/asm/preempt.h:1, from include/linux/preempt.h:78, from include/linux/percpu.h:6, from include/linux/context_tracking_state.h:5, from include/linux/hardirq.h:5, from include/linux/kvm_host.h:7, from arch/powerpc/kvm/book3s_hv_interrupt.c:3: >> arch/powerpc/kvm/book3s_hv_interrupt.c:187:31: error: 'struct kvmppc_host_state' has no member named 'fake_suspend' 187 | (local_paca->kvm_hstate.fake_suspend << PSSCR_FAKE_SUSPEND_LG)); | ^ arch/powerpc/include/asm/reg.h:1393:33: note: in definition of macro 'mtspr' 1393 | : "r" ((unsigned long)(v)) \ | ^ arch/powerpc/kvm/book3s_hv_interrupt.c:191:31: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 191 | mtspr(SPRN_SPRG0, vcpu->arch.shregs.sprg0); | ^~~~~~ arch/powerpc/include/asm/reg.h:1393:33: note: in definition of macro 'mtspr' 1393 | : "r" ((unsigned long)(v)) \ | ^ arch/powerpc/kvm/book3s_hv_interrupt.c:192:31: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 192 | mtspr(SPRN_SPRG1, vcpu->arch.shregs.sprg1); | ^~~~~~ arch/powerpc/include/asm/reg.h:1393:33: note: in definition of macro 'mtspr' 1393 | : "r" ((unsigned long)(v)) \ | ^ arch/powerpc/kvm/book3s_hv_interrupt.c:193:31: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 193 | mtspr(SPRN_SPRG2, vcpu->arch.shregs.sprg2); | ^~~~~~ arch/powerpc/include/asm/reg.h:1393:33: note: in definition of macro 'mtspr' 1393 | : "r" ((unsigned long)(v)) \ | ^ arch/powerpc/kvm/book3s_hv_interrupt.c:194:31: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 194 | mtspr(SPRN_SPRG3, vcpu->arch.shregs.sprg3); | ^~~~~~ arch/powerpc/include/asm/reg.h:1393:33: note: in definition of macro 'mtspr' 1393 | : "r" ((unsigned long)(v)) \ | ^ arch/powerpc/kvm/book3s_hv_interrupt.c:206:30: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 206 | mtspr(SPRN_SRR0, vcpu->arch.shregs.srr0); | ^~~~~~ arch/powerpc/include/asm/reg.h:1393:33: note: in definition of macro 'mtspr' 1393 | : "r" ((unsigned long)(v)) \ | ^ arch/powerpc/kvm/book3s_hv_interrupt.c:207:30: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 207 | mtspr(SPRN_SRR1, vcpu->arch.shregs.srr1); | ^~~~~~ arch/powerpc/include/asm/reg.h:1393:33: note: in definition of macro 'mtspr' 1393 | : "r" ((unsigned long)(v)) \ | ^ In file included from arch/powerpc/include/asm/bug.h:109, from include/linux/bug.h:5, from include/linux/mmdebug.h:5, from include/linux/percpu.h:5, from include/linux/context_tracking_state.h:5, from include/linux/hardirq.h:5, from include/linux/kvm_host.h:7, from arch/powerpc/kvm/book3s_hv_interrupt.c:3: arch/powerpc/kvm/book3s_hv_interrupt.c:213:26: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 213 | WARN_ON_ONCE(vcpu->arch.shregs.msr & MSR_HV); | ^~~~~~ include/asm-generic/bug.h:102:25: note: in definition of macro 'WARN_ON_ONCE' 102 | int __ret_warn_on = !!(condition); \ | ^~~~~~~~~ arch/powerpc/kvm/book3s_hv_interrupt.c:214:28: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 214 | WARN_ON_ONCE(!(vcpu->arch.shregs.msr & MSR_ME)); | ^~~~~~ include/asm-generic/bug.h:102:25: note: in definition of macro 'WARN_ON_ONCE' 102 | int __ret_warn_on = !!(condition); \ | ^~~~~~~~~ In file included from arch/powerpc/include/asm/processor.h:11, from arch/powerpc/include/asm/thread_info.h:40, from include/linux/thread_info.h:58, from include/asm-generic/preempt.h:5, from ./arch/powerpc/include/generated/asm/preempt.h:1, from include/linux/preempt.h:78, from include/linux/percpu.h:6, from include/linux/context_tracking_state.h:5, from include/linux/hardirq.h:5, from include/linux/kvm_host.h:7, from arch/powerpc/kvm/book3s_hv_interrupt.c:3: arch/powerpc/kvm/book3s_hv_interrupt.c:217:32: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 217 | mtspr(SPRN_HSRR1, (vcpu->arch.shregs.msr & ~MSR_HV) | MSR_ME); | ^~~~~~ arch/powerpc/include/asm/reg.h:1393:33: note: in definition of macro 'mtspr' 1393 | : "r" ((unsigned long)(v)) \ | ^ arch/powerpc/kvm/book3s_hv_interrupt.c:244:13: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 244 | vcpu->arch.shregs.srr0 = mfspr(SPRN_SRR0); | ^~~~~~ | regs arch/powerpc/kvm/book3s_hv_interrupt.c:245:13: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 245 | vcpu->arch.shregs.srr1 = mfspr(SPRN_SRR1); | ^~~~~~ | regs arch/powerpc/kvm/book3s_hv_interrupt.c:246:13: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 246 | vcpu->arch.shregs.dar = mfspr(SPRN_DAR); | ^~~~~~ | regs arch/powerpc/kvm/book3s_hv_interrupt.c:247:13: error: 'struct kvm_vcpu_arch' has no member named 'shregs'; did you mean 'regs'? 247 | vcpu->arch.shregs.dsisr = mfspr(SPRN_DSISR); | ^~~~~~ | regs arch/powerpc/kvm/book3s_hv_interrupt.c:281:13: error: 'struct kvm_vcpu_arch' has no member named 'emul_inst' 281 | vcpu->arch.emul_inst = mfspr(SPRN_HEIR); | ^ In file included from arch/powerpc/include/asm/processor.h:11, from arch/powerpc/include/asm/thread_info.h:40, from include/linux/thread_info.h:58, vim +170 arch/powerpc/kvm/book3s_hv_interrupt.c 127 128 int kvmhv_vcpu_entry_p9(struct kvm_vcpu *vcpu, u64 time_limit, unsigned long lpcr) 129 { 130 struct kvm *kvm = vcpu->kvm; 131 struct kvmppc_vcore *vc = vcpu->arch.vcore; 132 s64 hdec; 133 u64 tb, purr, spurr; 134 u64 *exsave; 135 unsigned long msr = mfmsr(); 136 int trap; 137 unsigned long host_hfscr = mfspr(SPRN_HFSCR); 138 unsigned long host_ciabr = mfspr(SPRN_CIABR); 139 unsigned long host_dawr0 = mfspr(SPRN_DAWR0); 140 unsigned long host_dawrx0 = mfspr(SPRN_DAWRX0); 141 unsigned long host_psscr = mfspr(SPRN_PSSCR); 142 unsigned long host_pidr = mfspr(SPRN_PID); 143 unsigned long host_dawr1 = 0; 144 unsigned long host_dawrx1 = 0; 145 146 if (cpu_has_feature(CPU_FTR_DAWR1)) { 147 host_dawr1 = mfspr(SPRN_DAWR1); 148 host_dawrx1 = mfspr(SPRN_DAWRX1); 149 } 150 151 tb = mftb(); 152 hdec = time_limit - tb; 153 if (hdec < 0) 154 return BOOK3S_INTERRUPT_HV_DECREMENTER; 155 156 if (vc->tb_offset) { 157 u64 new_tb = tb + vc->tb_offset; 158 mtspr(SPRN_TBU40, new_tb); 159 tb = mftb(); 160 if ((tb & 0xffffff) < (new_tb & 0xffffff)) 161 mtspr(SPRN_TBU40, new_tb + 0x1000000); 162 vc->tb_offset_applied = vc->tb_offset; 163 } 164 165 if (vc->pcr) 166 mtspr(SPRN_PCR, vc->pcr | PCR_MASK); 167 mtspr(SPRN_DPDES, vc->dpdes); 168 mtspr(SPRN_VTB, vc->vtb); 169 > 170 local_paca->kvm_hstate.host_purr = mfspr(SPRN_PURR); > 171 local_paca->kvm_hstate.host_spurr = mfspr(SPRN_SPURR); 172 mtspr(SPRN_PURR, vcpu->arch.purr); 173 mtspr(SPRN_SPURR, vcpu->arch.spurr); 174 175 if (dawr_enabled()) { 176 mtspr(SPRN_DAWR0, vcpu->arch.dawr0); 177 mtspr(SPRN_DAWRX0, vcpu->arch.dawrx0); 178 if (cpu_has_feature(CPU_FTR_DAWR1)) { 179 mtspr(SPRN_DAWR1, vcpu->arch.dawr1); 180 mtspr(SPRN_DAWRX1, vcpu->arch.dawrx1); 181 } 182 } 183 mtspr(SPRN_CIABR, vcpu->arch.ciabr); 184 mtspr(SPRN_IC, vcpu->arch.ic); 185 186 mtspr(SPRN_PSSCR, vcpu->arch.psscr | PSSCR_EC | > 187 (local_paca->kvm_hstate.fake_suspend << PSSCR_FAKE_SUSPEND_LG)); 188 189 mtspr(SPRN_HFSCR, vcpu->arch.hfscr); 190 191 mtspr(SPRN_SPRG0, vcpu->arch.shregs.sprg0); 192 mtspr(SPRN_SPRG1, vcpu->arch.shregs.sprg1); 193 mtspr(SPRN_SPRG2, vcpu->arch.shregs.sprg2); 194 mtspr(SPRN_SPRG3, vcpu->arch.shregs.sprg3); 195 196 mtspr(SPRN_AMOR, ~0UL); 197 198 switch_mmu_to_guest_radix(kvm, vcpu, lpcr); 199 200 /* 201 * P9 suppresses the HDEC exception when LPCR[HDICE] = 0, 202 * so set guest LPCR (with HDICE) before writing HDEC. 203 */ 204 mtspr(SPRN_HDEC, hdec); 205 206 mtspr(SPRN_SRR0, vcpu->arch.shregs.srr0); 207 mtspr(SPRN_SRR1, vcpu->arch.shregs.srr1); 208 209 start_timing(vcpu, &vcpu->arch.rm_entry); 210 211 vcpu->arch.ceded = 0; 212 213 WARN_ON_ONCE(vcpu->arch.shregs.msr & MSR_HV); 214 WARN_ON_ONCE(!(vcpu->arch.shregs.msr & MSR_ME)); 215 216 mtspr(SPRN_HSRR0, vcpu->arch.regs.nip); 217 mtspr(SPRN_HSRR1, (vcpu->arch.shregs.msr & ~MSR_HV) | MSR_ME); 218 219 /* 220 * On POWER9 DD2.1 and below, sometimes on a Hypervisor Data Storage 221 * Interrupt (HDSI) the HDSISR is not be updated at all. 222 * 223 * To work around this we put a canary value into the HDSISR before 224 * returning to a guest and then check for this canary when we take a 225 * HDSI. If we find the canary on a HDSI, we know the hardware didn't 226 * update the HDSISR. In this case we return to the guest to retake the 227 * HDSI which should correctly update the HDSISR the second time HDSI 228 * entry. 229 * 230 * Just do this on all p9 processors for now. 231 */ 232 mtspr(SPRN_HDSISR, HDSISR_CANARY); 233 234 accumulate_time(vcpu, &vcpu->arch.guest_time); 235 236 local_paca->kvm_hstate.in_guest = KVM_GUEST_MODE_GUEST_HV_FAST; 237 kvmppc_p9_enter_guest(vcpu); 238 // Radix host and guest means host never runs with guest MMU state 239 local_paca->kvm_hstate.in_guest = KVM_GUEST_MODE_NONE; 240 241 accumulate_time(vcpu, &vcpu->arch.rm_intr); 242 243 /* Get these from r11/12 and paca exsave */ 244 vcpu->arch.shregs.srr0 = mfspr(SPRN_SRR0); 245 vcpu->arch.shregs.srr1 = mfspr(SPRN_SRR1); 246 vcpu->arch.shregs.dar = mfspr(SPRN_DAR); 247 vcpu->arch.shregs.dsisr = mfspr(SPRN_DSISR); 248 249 /* 0x2 bit for HSRR is only used by PR and P7/8 HV paths, clear it */ 250 trap = local_paca->kvm_hstate.scratch0 & ~0x2; 251 if (likely(trap > BOOK3S_INTERRUPT_MACHINE_CHECK)) { 252 exsave = local_paca->exgen; 253 } else if (trap == BOOK3S_INTERRUPT_SYSTEM_RESET) { 254 exsave = local_paca->exnmi; 255 } else { /* trap == 0x200 */ 256 exsave = local_paca->exmc; 257 } 258 259 vcpu->arch.regs.gpr[1] = local_paca->kvm_hstate.scratch1; 260 vcpu->arch.regs.gpr[3] = local_paca->kvm_hstate.scratch2; 261 vcpu->arch.regs.gpr[9] = exsave[EX_R9/sizeof(u64)]; 262 vcpu->arch.regs.gpr[10] = exsave[EX_R10/sizeof(u64)]; 263 vcpu->arch.regs.gpr[11] = exsave[EX_R11/sizeof(u64)]; 264 vcpu->arch.regs.gpr[12] = exsave[EX_R12/sizeof(u64)]; 265 vcpu->arch.regs.gpr[13] = exsave[EX_R13/sizeof(u64)]; 266 vcpu->arch.ppr = exsave[EX_PPR/sizeof(u64)]; 267 vcpu->arch.cfar = exsave[EX_CFAR/sizeof(u64)]; 268 vcpu->arch.regs.ctr = exsave[EX_CTR/sizeof(u64)]; 269 270 vcpu->arch.last_inst = KVM_INST_FETCH_FAILED; 271 272 if (unlikely(trap == BOOK3S_INTERRUPT_MACHINE_CHECK)) { 273 vcpu->arch.fault_dar = exsave[EX_DAR/sizeof(u64)]; 274 vcpu->arch.fault_dsisr = exsave[EX_DSISR/sizeof(u64)]; 275 kvmppc_realmode_machine_check(vcpu); 276 277 } else if (unlikely(trap == BOOK3S_INTERRUPT_HMI)) { 278 kvmppc_realmode_hmi_handler(); 279 280 } else if (trap == BOOK3S_INTERRUPT_H_EMUL_ASSIST) { 281 vcpu->arch.emul_inst = mfspr(SPRN_HEIR); 282 283 } else if (trap == BOOK3S_INTERRUPT_H_DATA_STORAGE) { 284 vcpu->arch.fault_dar = exsave[EX_DAR/sizeof(u64)]; 285 vcpu->arch.fault_dsisr = exsave[EX_DSISR/sizeof(u64)]; 286 vcpu->arch.fault_gpa = mfspr(SPRN_ASDR); 287 288 } else if (trap == BOOK3S_INTERRUPT_H_INST_STORAGE) { 289 vcpu->arch.fault_gpa = mfspr(SPRN_ASDR); 290 291 } else if (trap == BOOK3S_INTERRUPT_H_FAC_UNAVAIL) { 292 vcpu->arch.hfscr = mfspr(SPRN_HFSCR); 293 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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