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Message-ID: <202507152017.8UNXIbRJ-lkp@intel.com>
Date: Tue, 15 Jul 2025 20:46:31 +0800
From: kernel test robot <lkp@...el.com>
To: Roman Kisel <romank@...ux.microsoft.com>, alok.a.tiwari@...cle.com,
arnd@...db.de, bp@...en8.de, corbet@....net,
dave.hansen@...ux.intel.com, decui@...rosoft.com,
haiyangz@...rosoft.com, hpa@...or.com, kys@...rosoft.com,
mhklinux@...look.com, mingo@...hat.com, rdunlap@...radead.org,
tglx@...utronix.de, Tianyu.Lan@...rosoft.com, wei.liu@...nel.org,
linux-arch@...r.kernel.org, linux-coco@...ts.linux.dev,
linux-doc@...r.kernel.org, linux-hyperv@...r.kernel.org,
linux-kernel@...r.kernel.org, x86@...nel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev,
apais@...rosoft.com, benhill@...rosoft.com, bperkins@...rosoft.com,
sunilmut@...rosoft.com
Subject: Re: [PATCH hyperv-next v4 03/16] arch: hyperv: Get/set SynIC
synth.registers via paravisor
Hi Roman,
kernel test robot noticed the following build errors:
[auto build test ERROR on d9016a249be5316ec2476f9947356711e70a16ec]
url: https://github.com/intel-lab-lkp/linux/commits/Roman-Kisel/Documentation-hyperv-Confidential-VMBus/20250715-062125
base: d9016a249be5316ec2476f9947356711e70a16ec
patch link: https://lore.kernel.org/r/20250714221545.5615-4-romank%40linux.microsoft.com
patch subject: [PATCH hyperv-next v4 03/16] arch: hyperv: Get/set SynIC synth.registers via paravisor
config: i386-buildonly-randconfig-005-20250715 (https://download.01.org/0day-ci/archive/20250715/202507152017.8UNXIbRJ-lkp@intel.com/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250715/202507152017.8UNXIbRJ-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@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202507152017.8UNXIbRJ-lkp@intel.com/
All errors (new ones prefixed by >>):
In file included from arch/x86/kvm/vmx/main.c:5:
In file included from arch/x86/kvm/vmx/vmx.h:16:
In file included from arch/x86/kvm/vmx/vmx_ops.h:9:
In file included from arch/x86/kvm/vmx/vmx_onhyperv.h:7:
In file included from arch/x86/include/asm/mshyperv.h:345:
>> include/asm-generic/mshyperv.h:377:4: error: call to undeclared function 'hv_para_set_synic_register'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
377 | hv_para_set_synic_register(HV_MSR_EOM, 0);
| ^
1 error generated.
--
In file included from arch/x86/kvm/svm/hyperv.c:7:
In file included from arch/x86/kvm/svm/hyperv.h:9:
In file included from arch/x86/include/asm/mshyperv.h:345:
>> include/asm-generic/mshyperv.h:377:4: error: call to undeclared function 'hv_para_set_synic_register'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
377 | hv_para_set_synic_register(HV_MSR_EOM, 0);
| ^
In file included from arch/x86/kvm/svm/hyperv.c:7:
In file included from arch/x86/kvm/svm/hyperv.h:11:
In file included from arch/x86/kvm/svm/../hyperv.h:24:
In file included from include/linux/kvm_host.h:11:
include/linux/signal.h:98:11: warning: array index 3 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
98 | return (set->sig[3] | set->sig[2] |
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kvm/svm/hyperv.c:7:
In file included from arch/x86/kvm/svm/hyperv.h:11:
In file included from arch/x86/kvm/svm/../hyperv.h:24:
In file included from include/linux/kvm_host.h:11:
include/linux/signal.h:98:25: warning: array index 2 is past the end of the array (that has type 'unsigned long[2]') [-Warray-bounds]
98 | return (set->sig[3] | set->sig[2] |
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kvm/svm/hyperv.c:7:
In file included from arch/x86/kvm/svm/hyperv.h:11:
In file included from arch/x86/kvm/svm/../hyperv.h:24:
In file included from include/linux/kvm_host.h:11:
include/linux/signal.h:114:11: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
114 | return (set1->sig[3] == set2->sig[3]) &&
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kvm/svm/hyperv.c:7:
In file included from arch/x86/kvm/svm/hyperv.h:11:
In file included from arch/x86/kvm/svm/../hyperv.h:24:
In file included from include/linux/kvm_host.h:11:
include/linux/signal.h:114:27: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
114 | return (set1->sig[3] == set2->sig[3]) &&
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kvm/svm/hyperv.c:7:
In file included from arch/x86/kvm/svm/hyperv.h:11:
In file included from arch/x86/kvm/svm/../hyperv.h:24:
In file included from include/linux/kvm_host.h:11:
include/linux/signal.h:115:5: warning: array index 2 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
115 | (set1->sig[2] == set2->sig[2]) &&
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kvm/svm/hyperv.c:7:
In file included from arch/x86/kvm/svm/hyperv.h:11:
In file included from arch/x86/kvm/svm/../hyperv.h:24:
In file included from include/linux/kvm_host.h:11:
include/linux/signal.h:115:21: warning: array index 2 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
115 | (set1->sig[2] == set2->sig[2]) &&
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kvm/svm/hyperv.c:7:
In file included from arch/x86/kvm/svm/hyperv.h:11:
In file included from arch/x86/kvm/svm/../hyperv.h:24:
In file included from include/linux/kvm_host.h:11:
include/linux/signal.h:157:1: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
157 | _SIG_SET_BINOP(sigorsets, _sig_or)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:138:8: note: expanded from macro '_SIG_SET_BINOP'
138 | a3 = a->sig[3]; a2 = a->sig[2]; \
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kvm/svm/hyperv.c:7:
In file included from arch/x86/kvm/svm/hyperv.h:11:
In file included from arch/x86/kvm/svm/../hyperv.h:24:
In file included from include/linux/kvm_host.h:11:
include/linux/signal.h:157:1: warning: array index 2 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
157 | _SIG_SET_BINOP(sigorsets, _sig_or)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:138:24: note: expanded from macro '_SIG_SET_BINOP'
138 | a3 = a->sig[3]; a2 = a->sig[2]; \
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
| ^
In file included from arch/x86/kvm/svm/hyperv.c:7:
In file included from arch/x86/kvm/svm/hyperv.h:11:
In file included from arch/x86/kvm/svm/../hyperv.h:24:
In file included from include/linux/kvm_host.h:11:
include/linux/signal.h:157:1: warning: array index 3 is past the end of the array (that has type 'const unsigned long[2]') [-Warray-bounds]
157 | _SIG_SET_BINOP(sigorsets, _sig_or)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
include/linux/signal.h:139:8: note: expanded from macro '_SIG_SET_BINOP'
139 | b3 = b->sig[3]; b2 = b->sig[2]; \
| ^ ~
arch/x86/include/asm/signal.h:24:2: note: array 'sig' declared here
24 | unsigned long sig[_NSIG_WORDS];
vim +/hv_para_set_synic_register +377 include/asm-generic/mshyperv.h
344
345 /* Free the message slot and signal end-of-message if required */
346 static inline void vmbus_signal_eom(struct hv_message *msg, u32 old_msg_type)
347 {
348 /*
349 * On crash we're reading some other CPU's message page and we need
350 * to be careful: this other CPU may already had cleared the header
351 * and the host may already had delivered some other message there.
352 * In case we blindly write msg->header.message_type we're going
353 * to lose it. We can still lose a message of the same type but
354 * we count on the fact that there can only be one
355 * CHANNELMSG_UNLOAD_RESPONSE and we don't care about other messages
356 * on crash.
357 */
358 if (cmpxchg(&msg->header.message_type, old_msg_type,
359 HVMSG_NONE) != old_msg_type)
360 return;
361
362 /*
363 * The cmxchg() above does an implicit memory barrier to
364 * ensure the write to MessageType (ie set to
365 * HVMSG_NONE) happens before we read the
366 * MessagePending and EOMing. Otherwise, the EOMing
367 * will not deliver any more messages since there is
368 * no empty slot
369 */
370 if (msg->header.message_flags.msg_pending) {
371 /*
372 * This will cause message queue rescan to
373 * possibly deliver another msg from the
374 * hypervisor
375 */
376 if (vmbus_is_confidential())
> 377 hv_para_set_synic_register(HV_MSR_EOM, 0);
378 else
379 hv_set_msr(HV_MSR_EOM, 0);
380 }
381 }
382
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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