tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 280d542f6ffac0e6d65dc267f92191d509b13b64 commit: cf59eb13e151ef42c37ae31864046c17e481ed8f KVM: PPC: Book3S: Fix symbol undeclared warnings date: 5 months ago config: powerpc-randconfig-r006-20210305 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 4d90e460bcc7b3e5ff6c7e2e05e974772489c4b8) 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 powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=cf59eb13e151ef42c37ae31864046c17e481ed8f git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout cf59eb13e151ef42c37ae31864046c17e481ed8f # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc
If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <l...@intel.com> All errors (new ones prefixed by >>): >> arch/powerpc/kvm/book3s_hv_nested.c:218:6: error: stack frame size of 2176 >> bytes in function 'kvmhv_enter_nested_guest' [-Werror,-Wframe-larger-than=] long kvmhv_enter_nested_guest(struct kvm_vcpu *vcpu) ^ 1 error generated. vim +/kvmhv_enter_nested_guest +218 arch/powerpc/kvm/book3s_hv_nested.c 873db2cd9a6d7f Suraj Jitindar Singh 2018-12-14 217 360cae313702cd Paul Mackerras 2018-10-08 @218 long kvmhv_enter_nested_guest(struct kvm_vcpu *vcpu) 360cae313702cd Paul Mackerras 2018-10-08 219 { 360cae313702cd Paul Mackerras 2018-10-08 220 long int err, r; 360cae313702cd Paul Mackerras 2018-10-08 221 struct kvm_nested_guest *l2; 360cae313702cd Paul Mackerras 2018-10-08 222 struct pt_regs l2_regs, saved_l1_regs; 360cae313702cd Paul Mackerras 2018-10-08 223 struct hv_guest_state l2_hv, saved_l1_hv; 360cae313702cd Paul Mackerras 2018-10-08 224 struct kvmppc_vcore *vc = vcpu->arch.vcore; 360cae313702cd Paul Mackerras 2018-10-08 225 u64 hv_ptr, regs_ptr; 360cae313702cd Paul Mackerras 2018-10-08 226 u64 hdec_exp; 360cae313702cd Paul Mackerras 2018-10-08 227 s64 delta_purr, delta_spurr, delta_ic, delta_vtb; 360cae313702cd Paul Mackerras 2018-10-08 228 u64 mask; 360cae313702cd Paul Mackerras 2018-10-08 229 unsigned long lpcr; 360cae313702cd Paul Mackerras 2018-10-08 230 360cae313702cd Paul Mackerras 2018-10-08 231 if (vcpu->kvm->arch.l1_ptcr == 0) 360cae313702cd Paul Mackerras 2018-10-08 232 return H_NOT_AVAILABLE; 360cae313702cd Paul Mackerras 2018-10-08 233 360cae313702cd Paul Mackerras 2018-10-08 234 /* copy parameters in */ 360cae313702cd Paul Mackerras 2018-10-08 235 hv_ptr = kvmppc_get_gpr(vcpu, 4); 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 236 regs_ptr = kvmppc_get_gpr(vcpu, 5); 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 237 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); 360cae313702cd Paul Mackerras 2018-10-08 238 err = kvm_vcpu_read_guest(vcpu, hv_ptr, &l2_hv, 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 239 sizeof(struct hv_guest_state)) || 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 240 kvm_vcpu_read_guest(vcpu, regs_ptr, &l2_regs, 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 241 sizeof(struct pt_regs)); 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 242 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); 360cae313702cd Paul Mackerras 2018-10-08 243 if (err) 360cae313702cd Paul Mackerras 2018-10-08 244 return H_PARAMETER; 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 245 10b5022db7861a Suraj Jitindar Singh 2018-10-08 246 if (kvmppc_need_byteswap(vcpu)) 10b5022db7861a Suraj Jitindar Singh 2018-10-08 247 byteswap_hv_regs(&l2_hv); 360cae313702cd Paul Mackerras 2018-10-08 248 if (l2_hv.version != HV_GUEST_STATE_VERSION) 360cae313702cd Paul Mackerras 2018-10-08 249 return H_P2; 360cae313702cd Paul Mackerras 2018-10-08 250 10b5022db7861a Suraj Jitindar Singh 2018-10-08 251 if (kvmppc_need_byteswap(vcpu)) 10b5022db7861a Suraj Jitindar Singh 2018-10-08 252 byteswap_pt_regs(&l2_regs); 9d0b048da788c1 Suraj Jitindar Singh 2018-10-08 253 if (l2_hv.vcpu_token >= NR_CPUS) 9d0b048da788c1 Suraj Jitindar Singh 2018-10-08 254 return H_PARAMETER; 9d0b048da788c1 Suraj Jitindar Singh 2018-10-08 255 360cae313702cd Paul Mackerras 2018-10-08 256 /* translate lpid */ 360cae313702cd Paul Mackerras 2018-10-08 257 l2 = kvmhv_get_nested(vcpu->kvm, l2_hv.lpid, true); 360cae313702cd Paul Mackerras 2018-10-08 258 if (!l2) 360cae313702cd Paul Mackerras 2018-10-08 259 return H_PARAMETER; 360cae313702cd Paul Mackerras 2018-10-08 260 if (!l2->l1_gr_to_hr) { 360cae313702cd Paul Mackerras 2018-10-08 261 mutex_lock(&l2->tlb_lock); 360cae313702cd Paul Mackerras 2018-10-08 262 kvmhv_update_ptbl_cache(l2); 360cae313702cd Paul Mackerras 2018-10-08 263 mutex_unlock(&l2->tlb_lock); 360cae313702cd Paul Mackerras 2018-10-08 264 } 360cae313702cd Paul Mackerras 2018-10-08 265 360cae313702cd Paul Mackerras 2018-10-08 266 /* save l1 values of things */ 360cae313702cd Paul Mackerras 2018-10-08 267 vcpu->arch.regs.msr = vcpu->arch.shregs.msr; 360cae313702cd Paul Mackerras 2018-10-08 268 saved_l1_regs = vcpu->arch.regs; 360cae313702cd Paul Mackerras 2018-10-08 269 kvmhv_save_hv_regs(vcpu, &saved_l1_hv); 360cae313702cd Paul Mackerras 2018-10-08 270 360cae313702cd Paul Mackerras 2018-10-08 271 /* convert TB values/offsets to host (L0) values */ 360cae313702cd Paul Mackerras 2018-10-08 272 hdec_exp = l2_hv.hdec_expiry - vc->tb_offset; 360cae313702cd Paul Mackerras 2018-10-08 273 vc->tb_offset += l2_hv.tb_offset; 360cae313702cd Paul Mackerras 2018-10-08 274 360cae313702cd Paul Mackerras 2018-10-08 275 /* set L1 state to L2 state */ 360cae313702cd Paul Mackerras 2018-10-08 276 vcpu->arch.nested = l2; 360cae313702cd Paul Mackerras 2018-10-08 277 vcpu->arch.nested_vcpu_id = l2_hv.vcpu_token; 360cae313702cd Paul Mackerras 2018-10-08 278 vcpu->arch.regs = l2_regs; 360cae313702cd Paul Mackerras 2018-10-08 279 vcpu->arch.shregs.msr = vcpu->arch.regs.msr; 360cae313702cd Paul Mackerras 2018-10-08 280 mask = LPCR_DPFD | LPCR_ILE | LPCR_TC | LPCR_AIL | LPCR_LD | 360cae313702cd Paul Mackerras 2018-10-08 281 LPCR_LPES | LPCR_MER; 360cae313702cd Paul Mackerras 2018-10-08 282 lpcr = (vc->lpcr & ~mask) | (l2_hv.lpcr & mask); 73937deb4b2d7f Suraj Jitindar Singh 2018-10-08 283 sanitise_hv_regs(vcpu, &l2_hv); 360cae313702cd Paul Mackerras 2018-10-08 284 restore_hv_regs(vcpu, &l2_hv); 360cae313702cd Paul Mackerras 2018-10-08 285 360cae313702cd Paul Mackerras 2018-10-08 286 vcpu->arch.ret = RESUME_GUEST; 360cae313702cd Paul Mackerras 2018-10-08 287 vcpu->arch.trap = 0; 360cae313702cd Paul Mackerras 2018-10-08 288 do { 360cae313702cd Paul Mackerras 2018-10-08 289 if (mftb() >= hdec_exp) { 360cae313702cd Paul Mackerras 2018-10-08 290 vcpu->arch.trap = BOOK3S_INTERRUPT_HV_DECREMENTER; 360cae313702cd Paul Mackerras 2018-10-08 291 r = RESUME_HOST; 360cae313702cd Paul Mackerras 2018-10-08 292 break; 360cae313702cd Paul Mackerras 2018-10-08 293 } 8c99d34578628b Tianjia Zhang 2020-04-27 294 r = kvmhv_run_single_vcpu(vcpu, hdec_exp, lpcr); 360cae313702cd Paul Mackerras 2018-10-08 295 } while (is_kvmppc_resume_guest(r)); 360cae313702cd Paul Mackerras 2018-10-08 296 360cae313702cd Paul Mackerras 2018-10-08 297 /* save L2 state for return */ 360cae313702cd Paul Mackerras 2018-10-08 298 l2_regs = vcpu->arch.regs; 360cae313702cd Paul Mackerras 2018-10-08 299 l2_regs.msr = vcpu->arch.shregs.msr; 360cae313702cd Paul Mackerras 2018-10-08 300 delta_purr = vcpu->arch.purr - l2_hv.purr; 360cae313702cd Paul Mackerras 2018-10-08 301 delta_spurr = vcpu->arch.spurr - l2_hv.spurr; 360cae313702cd Paul Mackerras 2018-10-08 302 delta_ic = vcpu->arch.ic - l2_hv.ic; 360cae313702cd Paul Mackerras 2018-10-08 303 delta_vtb = vc->vtb - l2_hv.vtb; 360cae313702cd Paul Mackerras 2018-10-08 304 save_hv_return_state(vcpu, vcpu->arch.trap, &l2_hv); 360cae313702cd Paul Mackerras 2018-10-08 305 360cae313702cd Paul Mackerras 2018-10-08 306 /* restore L1 state */ 360cae313702cd Paul Mackerras 2018-10-08 307 vcpu->arch.nested = NULL; 360cae313702cd Paul Mackerras 2018-10-08 308 vcpu->arch.regs = saved_l1_regs; 360cae313702cd Paul Mackerras 2018-10-08 309 vcpu->arch.shregs.msr = saved_l1_regs.msr & ~MSR_TS_MASK; 360cae313702cd Paul Mackerras 2018-10-08 310 /* set L1 MSR TS field according to L2 transaction state */ 360cae313702cd Paul Mackerras 2018-10-08 311 if (l2_regs.msr & MSR_TS_MASK) 360cae313702cd Paul Mackerras 2018-10-08 312 vcpu->arch.shregs.msr |= MSR_TS_S; 360cae313702cd Paul Mackerras 2018-10-08 313 vc->tb_offset = saved_l1_hv.tb_offset; 360cae313702cd Paul Mackerras 2018-10-08 314 restore_hv_regs(vcpu, &saved_l1_hv); 360cae313702cd Paul Mackerras 2018-10-08 315 vcpu->arch.purr += delta_purr; 360cae313702cd Paul Mackerras 2018-10-08 316 vcpu->arch.spurr += delta_spurr; 360cae313702cd Paul Mackerras 2018-10-08 317 vcpu->arch.ic += delta_ic; 360cae313702cd Paul Mackerras 2018-10-08 318 vc->vtb += delta_vtb; 360cae313702cd Paul Mackerras 2018-10-08 319 360cae313702cd Paul Mackerras 2018-10-08 320 kvmhv_put_nested(l2); 360cae313702cd Paul Mackerras 2018-10-08 321 360cae313702cd Paul Mackerras 2018-10-08 322 /* copy l2_hv_state and regs back to guest */ 10b5022db7861a Suraj Jitindar Singh 2018-10-08 323 if (kvmppc_need_byteswap(vcpu)) { 10b5022db7861a Suraj Jitindar Singh 2018-10-08 324 byteswap_hv_regs(&l2_hv); 10b5022db7861a Suraj Jitindar Singh 2018-10-08 325 byteswap_pt_regs(&l2_regs); 10b5022db7861a Suraj Jitindar Singh 2018-10-08 326 } 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 327 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); 360cae313702cd Paul Mackerras 2018-10-08 328 err = kvm_vcpu_write_guest(vcpu, hv_ptr, &l2_hv, 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 329 sizeof(struct hv_guest_state)) || 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 330 kvm_vcpu_write_guest(vcpu, regs_ptr, &l2_regs, 360cae313702cd Paul Mackerras 2018-10-08 331 sizeof(struct pt_regs)); 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 332 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); 360cae313702cd Paul Mackerras 2018-10-08 333 if (err) 360cae313702cd Paul Mackerras 2018-10-08 334 return H_AUTHORITY; 360cae313702cd Paul Mackerras 2018-10-08 335 360cae313702cd Paul Mackerras 2018-10-08 336 if (r == -EINTR) 360cae313702cd Paul Mackerras 2018-10-08 337 return H_INTERRUPT; 360cae313702cd Paul Mackerras 2018-10-08 338 873db2cd9a6d7f Suraj Jitindar Singh 2018-12-14 339 if (vcpu->mmio_needed) { 873db2cd9a6d7f Suraj Jitindar Singh 2018-12-14 340 kvmhv_nested_mmio_needed(vcpu, regs_ptr); 873db2cd9a6d7f Suraj Jitindar Singh 2018-12-14 341 return H_TOO_HARD; 873db2cd9a6d7f Suraj Jitindar Singh 2018-12-14 342 } 873db2cd9a6d7f Suraj Jitindar Singh 2018-12-14 343 360cae313702cd Paul Mackerras 2018-10-08 344 return vcpu->arch.trap; 360cae313702cd Paul Mackerras 2018-10-08 345 } 360cae313702cd Paul Mackerras 2018-10-08 346 :::::: The code at line 218 was first introduced by commit :::::: 360cae313702cdd0b90f82c261a8302fecef030a KVM: PPC: Book3S HV: Nested guest entry via hypercall :::::: TO: Paul Mackerras <pau...@ozlabs.org> :::::: CC: Michael Ellerman <m...@ellerman.id.au> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
.config.gz
Description: application/gzip