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 <l...@intel.com>
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 <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
