* Re: [RFC Patch v2 3/4] x86/Hyper-V: Not use auto-eoi when Secure AVIC is available
[not found] <20250613110829.122371-4-ltykernel@gmail.com>
@ 2025-06-14 13:32 ` kernel test robot
0 siblings, 0 replies; only message in thread
From: kernel test robot @ 2025-06-14 13:32 UTC (permalink / raw)
To: Tianyu Lan; +Cc: llvm, oe-kbuild-all
Hi Tianyu,
[This is a private test report for your RFC patch.]
kernel test robot noticed the following build errors:
[auto build test ERROR on tip/x86/core]
[also build test ERROR on linus/master v6.16-rc1 next-20250613]
[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#_base_tree_information]
url: https://github.com/intel-lab-lkp/linux/commits/Tianyu-Lan/x86-Hyper-V-Not-use-hv-apic-driver-when-Secure-AVIC-is-available/20250613-191041
base: tip/x86/core
patch link: https://lore.kernel.org/r/20250613110829.122371-4-ltykernel%40gmail.com
patch subject: [RFC Patch v2 3/4] x86/Hyper-V: Not use auto-eoi when Secure AVIC is available
config: i386-buildonly-randconfig-003-20250614 (https://download.01.org/0day-ci/archive/20250614/202506142143.mZm3MmgZ-lkp@intel.com/config)
compiler: clang version 20.1.2 (https://github.com/llvm/llvm-project 58df0ef89dd64126512e4ee27b4ac3fd8ddf6247)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250614/202506142143.mZm3MmgZ-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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202506142143.mZm3MmgZ-lkp@intel.com/
All errors (new ones prefixed by >>):
>> arch/x86/kernel/cpu/mshyperv.c:466:22: error: use of undeclared identifier 'CC_ATTR_SNP_SECURE_AVIC'
466 | if (cc_platform_has(CC_ATTR_SNP_SECURE_AVIC))
| ^
1 error generated.
vim +/CC_ATTR_SNP_SECURE_AVIC +466 arch/x86/kernel/cpu/mshyperv.c
442
443 /*
444 * Extract the features and hints
445 */
446 ms_hyperv.features = cpuid_eax(HYPERV_CPUID_FEATURES);
447 ms_hyperv.priv_high = cpuid_ebx(HYPERV_CPUID_FEATURES);
448 ms_hyperv.ext_features = cpuid_ecx(HYPERV_CPUID_FEATURES);
449 ms_hyperv.misc_features = cpuid_edx(HYPERV_CPUID_FEATURES);
450 ms_hyperv.hints = cpuid_eax(HYPERV_CPUID_ENLIGHTMENT_INFO);
451
452 hv_max_functions_eax = cpuid_eax(HYPERV_CPUID_VENDOR_AND_MAX_FUNCTIONS);
453
454 pr_info("Hyper-V: privilege flags low %#x, high %#x, ext %#x, hints %#x, misc %#x\n",
455 ms_hyperv.features, ms_hyperv.priv_high,
456 ms_hyperv.ext_features, ms_hyperv.hints,
457 ms_hyperv.misc_features);
458
459 ms_hyperv.max_vp_index = cpuid_eax(HYPERV_CPUID_IMPLEMENT_LIMITS);
460 ms_hyperv.max_lp_index = cpuid_ebx(HYPERV_CPUID_IMPLEMENT_LIMITS);
461
462 pr_debug("Hyper-V: max %u virtual processors, %u logical processors\n",
463 ms_hyperv.max_vp_index, ms_hyperv.max_lp_index);
464
465 hv_identify_partition_type();
> 466 if (cc_platform_has(CC_ATTR_SNP_SECURE_AVIC))
467 ms_hyperv.hints |= HV_DEPRECATING_AEOI_RECOMMENDED;
468
469 if (ms_hyperv.hints & HV_X64_HYPERV_NESTED) {
470 hv_nested = true;
471 pr_info("Hyper-V: running on a nested hypervisor\n");
472 }
473
474 if (ms_hyperv.features & HV_ACCESS_FREQUENCY_MSRS &&
475 ms_hyperv.misc_features & HV_FEATURE_FREQUENCY_MSRS_AVAILABLE) {
476 x86_platform.calibrate_tsc = hv_get_tsc_khz;
477 x86_platform.calibrate_cpu = hv_get_tsc_khz;
478 setup_force_cpu_cap(X86_FEATURE_TSC_KNOWN_FREQ);
479 }
480
481 if (ms_hyperv.priv_high & HV_ISOLATION) {
482 ms_hyperv.isolation_config_a = cpuid_eax(HYPERV_CPUID_ISOLATION_CONFIG);
483 ms_hyperv.isolation_config_b = cpuid_ebx(HYPERV_CPUID_ISOLATION_CONFIG);
484
485 if (ms_hyperv.shared_gpa_boundary_active)
486 ms_hyperv.shared_gpa_boundary =
487 BIT_ULL(ms_hyperv.shared_gpa_boundary_bits);
488
489 hyperv_paravisor_present = !!ms_hyperv.paravisor_present;
490
491 pr_info("Hyper-V: Isolation Config: Group A 0x%x, Group B 0x%x\n",
492 ms_hyperv.isolation_config_a, ms_hyperv.isolation_config_b);
493
494
495 if (hv_get_isolation_type() == HV_ISOLATION_TYPE_SNP) {
496 static_branch_enable(&isolation_type_snp);
497 } else if (hv_get_isolation_type() == HV_ISOLATION_TYPE_TDX) {
498 static_branch_enable(&isolation_type_tdx);
499
500 /* A TDX VM must use x2APIC and doesn't use lazy EOI. */
501 ms_hyperv.hints &= ~HV_X64_APIC_ACCESS_RECOMMENDED;
502
503 if (!ms_hyperv.paravisor_present) {
504 /*
505 * Mark the Hyper-V TSC page feature as disabled
506 * in a TDX VM without paravisor so that the
507 * Invariant TSC, which is a better clocksource
508 * anyway, is used instead.
509 */
510 ms_hyperv.features &= ~HV_MSR_REFERENCE_TSC_AVAILABLE;
511
512 /*
513 * The Invariant TSC is expected to be available
514 * in a TDX VM without paravisor, but if not,
515 * print a warning message. The slower Hyper-V MSR-based
516 * Ref Counter should end up being the clocksource.
517 */
518 if (!(ms_hyperv.features & HV_ACCESS_TSC_INVARIANT))
519 pr_warn("Hyper-V: Invariant TSC is unavailable\n");
520
521 /* HV_MSR_CRASH_CTL is unsupported. */
522 ms_hyperv.misc_features &= ~HV_FEATURE_GUEST_CRASH_MSR_AVAILABLE;
523
524 /* Don't trust Hyper-V's TLB-flushing hypercalls. */
525 ms_hyperv.hints &= ~HV_X64_REMOTE_TLB_FLUSH_RECOMMENDED;
526
527 x86_init.acpi.reduced_hw_early_init = reduced_hw_init;
528 }
529 }
530 }
531
532 if (hv_max_functions_eax >= HYPERV_CPUID_NESTED_FEATURES) {
533 ms_hyperv.nested_features =
534 cpuid_eax(HYPERV_CPUID_NESTED_FEATURES);
535 pr_info("Hyper-V: Nested features: 0x%x\n",
536 ms_hyperv.nested_features);
537 }
538
--
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https://github.com/intel/lkp-tests/wiki
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