tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: d93a0d43e3d0ba9e19387be4dae4a8d5b175a8d7 commit: 97e4910232fa1f81e806aa60c25a0450276d99a2 linux/compiler-clang.h: define HAVE_BUILTIN_BSWAP* date: 3 weeks ago config: powerpc64-randconfig-r006-20210403 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 0fe8af94688aa03c01913c2001d6a1a911f42ce6) 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 powerpc64 cross compiling tool for clang build # apt-get install binutils-powerpc64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=97e4910232fa1f81e806aa60c25a0450276d99a2 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 97e4910232fa1f81e806aa60c25a0450276d99a2 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang 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_nested.c:264:6: error: stack frame size of 2304 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 +264 arch/powerpc/kvm/book3s_hv_nested.c afe75049303f75 Ravi Bangoria 2020-12-16 263 360cae313702cd Paul Mackerras 2018-10-08 @264 long kvmhv_enter_nested_guest(struct kvm_vcpu *vcpu) 360cae313702cd Paul Mackerras 2018-10-08 265 { 360cae313702cd Paul Mackerras 2018-10-08 266 long int err, r; 360cae313702cd Paul Mackerras 2018-10-08 267 struct kvm_nested_guest *l2; 360cae313702cd Paul Mackerras 2018-10-08 268 struct pt_regs l2_regs, saved_l1_regs; afe75049303f75 Ravi Bangoria 2020-12-16 269 struct hv_guest_state l2_hv = {0}, saved_l1_hv; 360cae313702cd Paul Mackerras 2018-10-08 270 struct kvmppc_vcore *vc = vcpu->arch.vcore; 360cae313702cd Paul Mackerras 2018-10-08 271 u64 hv_ptr, regs_ptr; 360cae313702cd Paul Mackerras 2018-10-08 272 u64 hdec_exp; 360cae313702cd Paul Mackerras 2018-10-08 273 s64 delta_purr, delta_spurr, delta_ic, delta_vtb; 360cae313702cd Paul Mackerras 2018-10-08 274 u64 mask; 360cae313702cd Paul Mackerras 2018-10-08 275 unsigned long lpcr; 360cae313702cd Paul Mackerras 2018-10-08 276 360cae313702cd Paul Mackerras 2018-10-08 277 if (vcpu->kvm->arch.l1_ptcr == 0) 360cae313702cd Paul Mackerras 2018-10-08 278 return H_NOT_AVAILABLE; 360cae313702cd Paul Mackerras 2018-10-08 279 360cae313702cd Paul Mackerras 2018-10-08 280 /* copy parameters in */ 360cae313702cd Paul Mackerras 2018-10-08 281 hv_ptr = kvmppc_get_gpr(vcpu, 4); 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 282 regs_ptr = kvmppc_get_gpr(vcpu, 5); 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 283 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); afe75049303f75 Ravi Bangoria 2020-12-16 284 err = kvmhv_read_guest_state_and_regs(vcpu, &l2_hv, &l2_regs, afe75049303f75 Ravi Bangoria 2020-12-16 285 hv_ptr, regs_ptr); 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 286 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); 360cae313702cd Paul Mackerras 2018-10-08 287 if (err) 360cae313702cd Paul Mackerras 2018-10-08 288 return H_PARAMETER; 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 289 10b5022db7861a Suraj Jitindar Singh 2018-10-08 290 if (kvmppc_need_byteswap(vcpu)) 10b5022db7861a Suraj Jitindar Singh 2018-10-08 291 byteswap_hv_regs(&l2_hv); afe75049303f75 Ravi Bangoria 2020-12-16 292 if (l2_hv.version > HV_GUEST_STATE_VERSION) 360cae313702cd Paul Mackerras 2018-10-08 293 return H_P2; 360cae313702cd Paul Mackerras 2018-10-08 294 10b5022db7861a Suraj Jitindar Singh 2018-10-08 295 if (kvmppc_need_byteswap(vcpu)) 10b5022db7861a Suraj Jitindar Singh 2018-10-08 296 byteswap_pt_regs(&l2_regs); 9d0b048da788c1 Suraj Jitindar Singh 2018-10-08 297 if (l2_hv.vcpu_token >= NR_CPUS) 9d0b048da788c1 Suraj Jitindar Singh 2018-10-08 298 return H_PARAMETER; 9d0b048da788c1 Suraj Jitindar Singh 2018-10-08 299 360cae313702cd Paul Mackerras 2018-10-08 300 /* translate lpid */ 360cae313702cd Paul Mackerras 2018-10-08 301 l2 = kvmhv_get_nested(vcpu->kvm, l2_hv.lpid, true); 360cae313702cd Paul Mackerras 2018-10-08 302 if (!l2) 360cae313702cd Paul Mackerras 2018-10-08 303 return H_PARAMETER; 360cae313702cd Paul Mackerras 2018-10-08 304 if (!l2->l1_gr_to_hr) { 360cae313702cd Paul Mackerras 2018-10-08 305 mutex_lock(&l2->tlb_lock); 360cae313702cd Paul Mackerras 2018-10-08 306 kvmhv_update_ptbl_cache(l2); 360cae313702cd Paul Mackerras 2018-10-08 307 mutex_unlock(&l2->tlb_lock); 360cae313702cd Paul Mackerras 2018-10-08 308 } 360cae313702cd Paul Mackerras 2018-10-08 309 360cae313702cd Paul Mackerras 2018-10-08 310 /* save l1 values of things */ 360cae313702cd Paul Mackerras 2018-10-08 311 vcpu->arch.regs.msr = vcpu->arch.shregs.msr; 360cae313702cd Paul Mackerras 2018-10-08 312 saved_l1_regs = vcpu->arch.regs; 360cae313702cd Paul Mackerras 2018-10-08 313 kvmhv_save_hv_regs(vcpu, &saved_l1_hv); 360cae313702cd Paul Mackerras 2018-10-08 314 360cae313702cd Paul Mackerras 2018-10-08 315 /* convert TB values/offsets to host (L0) values */ 360cae313702cd Paul Mackerras 2018-10-08 316 hdec_exp = l2_hv.hdec_expiry - vc->tb_offset; 360cae313702cd Paul Mackerras 2018-10-08 317 vc->tb_offset += l2_hv.tb_offset; 360cae313702cd Paul Mackerras 2018-10-08 318 360cae313702cd Paul Mackerras 2018-10-08 319 /* set L1 state to L2 state */ 360cae313702cd Paul Mackerras 2018-10-08 320 vcpu->arch.nested = l2; 360cae313702cd Paul Mackerras 2018-10-08 321 vcpu->arch.nested_vcpu_id = l2_hv.vcpu_token; 360cae313702cd Paul Mackerras 2018-10-08 322 vcpu->arch.regs = l2_regs; 360cae313702cd Paul Mackerras 2018-10-08 323 vcpu->arch.shregs.msr = vcpu->arch.regs.msr; 360cae313702cd Paul Mackerras 2018-10-08 324 mask = LPCR_DPFD | LPCR_ILE | LPCR_TC | LPCR_AIL | LPCR_LD | 360cae313702cd Paul Mackerras 2018-10-08 325 LPCR_LPES | LPCR_MER; 360cae313702cd Paul Mackerras 2018-10-08 326 lpcr = (vc->lpcr & ~mask) | (l2_hv.lpcr & mask); 73937deb4b2d7f Suraj Jitindar Singh 2018-10-08 327 sanitise_hv_regs(vcpu, &l2_hv); 360cae313702cd Paul Mackerras 2018-10-08 328 restore_hv_regs(vcpu, &l2_hv); 360cae313702cd Paul Mackerras 2018-10-08 329 360cae313702cd Paul Mackerras 2018-10-08 330 vcpu->arch.ret = RESUME_GUEST; 360cae313702cd Paul Mackerras 2018-10-08 331 vcpu->arch.trap = 0; 360cae313702cd Paul Mackerras 2018-10-08 332 do { 360cae313702cd Paul Mackerras 2018-10-08 333 if (mftb() >= hdec_exp) { 360cae313702cd Paul Mackerras 2018-10-08 334 vcpu->arch.trap = BOOK3S_INTERRUPT_HV_DECREMENTER; 360cae313702cd Paul Mackerras 2018-10-08 335 r = RESUME_HOST; 360cae313702cd Paul Mackerras 2018-10-08 336 break; 360cae313702cd Paul Mackerras 2018-10-08 337 } 8c99d34578628b Tianjia Zhang 2020-04-27 338 r = kvmhv_run_single_vcpu(vcpu, hdec_exp, lpcr); 360cae313702cd Paul Mackerras 2018-10-08 339 } while (is_kvmppc_resume_guest(r)); 360cae313702cd Paul Mackerras 2018-10-08 340 360cae313702cd Paul Mackerras 2018-10-08 341 /* save L2 state for return */ 360cae313702cd Paul Mackerras 2018-10-08 342 l2_regs = vcpu->arch.regs; 360cae313702cd Paul Mackerras 2018-10-08 343 l2_regs.msr = vcpu->arch.shregs.msr; 360cae313702cd Paul Mackerras 2018-10-08 344 delta_purr = vcpu->arch.purr - l2_hv.purr; 360cae313702cd Paul Mackerras 2018-10-08 345 delta_spurr = vcpu->arch.spurr - l2_hv.spurr; 360cae313702cd Paul Mackerras 2018-10-08 346 delta_ic = vcpu->arch.ic - l2_hv.ic; 360cae313702cd Paul Mackerras 2018-10-08 347 delta_vtb = vc->vtb - l2_hv.vtb; 360cae313702cd Paul Mackerras 2018-10-08 348 save_hv_return_state(vcpu, vcpu->arch.trap, &l2_hv); 360cae313702cd Paul Mackerras 2018-10-08 349 360cae313702cd Paul Mackerras 2018-10-08 350 /* restore L1 state */ 360cae313702cd Paul Mackerras 2018-10-08 351 vcpu->arch.nested = NULL; 360cae313702cd Paul Mackerras 2018-10-08 352 vcpu->arch.regs = saved_l1_regs; 360cae313702cd Paul Mackerras 2018-10-08 353 vcpu->arch.shregs.msr = saved_l1_regs.msr & ~MSR_TS_MASK; 360cae313702cd Paul Mackerras 2018-10-08 354 /* set L1 MSR TS field according to L2 transaction state */ 360cae313702cd Paul Mackerras 2018-10-08 355 if (l2_regs.msr & MSR_TS_MASK) 360cae313702cd Paul Mackerras 2018-10-08 356 vcpu->arch.shregs.msr |= MSR_TS_S; 360cae313702cd Paul Mackerras 2018-10-08 357 vc->tb_offset = saved_l1_hv.tb_offset; 360cae313702cd Paul Mackerras 2018-10-08 358 restore_hv_regs(vcpu, &saved_l1_hv); 360cae313702cd Paul Mackerras 2018-10-08 359 vcpu->arch.purr += delta_purr; 360cae313702cd Paul Mackerras 2018-10-08 360 vcpu->arch.spurr += delta_spurr; 360cae313702cd Paul Mackerras 2018-10-08 361 vcpu->arch.ic += delta_ic; 360cae313702cd Paul Mackerras 2018-10-08 362 vc->vtb += delta_vtb; 360cae313702cd Paul Mackerras 2018-10-08 363 360cae313702cd Paul Mackerras 2018-10-08 364 kvmhv_put_nested(l2); 360cae313702cd Paul Mackerras 2018-10-08 365 360cae313702cd Paul Mackerras 2018-10-08 366 /* copy l2_hv_state and regs back to guest */ 10b5022db7861a Suraj Jitindar Singh 2018-10-08 367 if (kvmppc_need_byteswap(vcpu)) { 10b5022db7861a Suraj Jitindar Singh 2018-10-08 368 byteswap_hv_regs(&l2_hv); 10b5022db7861a Suraj Jitindar Singh 2018-10-08 369 byteswap_pt_regs(&l2_regs); 10b5022db7861a Suraj Jitindar Singh 2018-10-08 370 } 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 371 vcpu->srcu_idx = srcu_read_lock(&vcpu->kvm->srcu); afe75049303f75 Ravi Bangoria 2020-12-16 372 err = kvmhv_write_guest_state_and_regs(vcpu, &l2_hv, &l2_regs, afe75049303f75 Ravi Bangoria 2020-12-16 373 hv_ptr, regs_ptr); 1508c22f112ce1 Alexey Kardashevskiy 2020-06-09 374 srcu_read_unlock(&vcpu->kvm->srcu, vcpu->srcu_idx); 360cae313702cd Paul Mackerras 2018-10-08 375 if (err) 360cae313702cd Paul Mackerras 2018-10-08 376 return H_AUTHORITY; 360cae313702cd Paul Mackerras 2018-10-08 377 360cae313702cd Paul Mackerras 2018-10-08 378 if (r == -EINTR) 360cae313702cd Paul Mackerras 2018-10-08 379 return H_INTERRUPT; 360cae313702cd Paul Mackerras 2018-10-08 380 873db2cd9a6d7f Suraj Jitindar Singh 2018-12-14 381 if (vcpu->mmio_needed) { 873db2cd9a6d7f Suraj Jitindar Singh 2018-12-14 382 kvmhv_nested_mmio_needed(vcpu, regs_ptr); 873db2cd9a6d7f Suraj Jitindar Singh 2018-12-14 383 return H_TOO_HARD; 873db2cd9a6d7f Suraj Jitindar Singh 2018-12-14 384 } 873db2cd9a6d7f Suraj Jitindar Singh 2018-12-14 385 360cae313702cd Paul Mackerras 2018-10-08 386 return vcpu->arch.trap; 360cae313702cd Paul Mackerras 2018-10-08 387 } 360cae313702cd Paul Mackerras 2018-10-08 388 :::::: The code at line 264 was first introduced by commit :::::: 360cae313702cdd0b90f82c261a8302fecef030a KVM: PPC: Book3S HV: Nested guest entry via hypercall :::::: TO: Paul Mackerras <paulus@xxxxxxxxxx> :::::: CC: Michael Ellerman <mpe@xxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
Attachment:
.config.gz
Description: application/gzip
