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Message-ID: <202503141349.bpi8pvc4-lkp@intel.com>
Date: Fri, 14 Mar 2025 14:26:12 +0800
From: kernel test robot <lkp@...el.com>
To: Akihiro Suda <suda.gitsendemail@...il.com>,
linux-kernel@...r.kernel.org
Cc: llvm@...ts.linux.dev, oe-kbuild-all@...ts.linux.dev, x86@...nel.org,
suda.kyoto@...il.com, regressions@...ts.linux.dev,
aruna.ramakrishna@...cle.com, tglx@...utronix.de,
Akihiro Suda <akihiro.suda.cz@....ntt.co.jp>
Subject: Re: [PATCH v2] x86: disable PKU when running on Apple Virtualization
Hi Akihiro,
kernel test robot noticed the following build errors:
[auto build test ERROR on tip/x86/core]
[also build test ERROR on tip/master linus/master v6.14-rc6 next-20250313]
[cannot apply to tip/auto-latest]
[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/Akihiro-Suda/x86-disable-PKU-when-running-on-Apple-Virtualization/20250312-181106
base: tip/x86/core
patch link: https://lore.kernel.org/r/20250312100926.34954-1-akihiro.suda.cz%40hco.ntt.co.jp
patch subject: [PATCH v2] x86: disable PKU when running on Apple Virtualization
config: x86_64-allnoconfig (https://download.01.org/0day-ci/archive/20250314/202503141349.bpi8pvc4-lkp@intel.com/config)
compiler: clang version 19.1.7 (https://github.com/llvm/llvm-project cd708029e0b2869e80abe31ddb175f7c35361f90)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250314/202503141349.bpi8pvc4-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/202503141349.bpi8pvc4-lkp@intel.com/
All errors (new ones prefixed by >>):
>> arch/x86/kernel/cpu/common.c:530:14: error: use of undeclared identifier 'acpi_gbl_FADT'
530 | if (!memcmp(acpi_gbl_FADT.header.oem_table_id, "Apple Vz", 8)) {
| ^
1 error generated.
vim +/acpi_gbl_FADT +530 arch/x86/kernel/cpu/common.c
517
518 static __always_inline void setup_pku(struct cpuinfo_x86 *c)
519 {
520 /*
521 * OSPKE seems broken on Apple Virtualization.
522 * https://lore.kernel.org/regressions/CAG8fp8QvH71Wi_y7b7tgFp7knK38rfrF7rRHh-gFKqeS0gxY6Q@mail.gmail.com/T/#u
523 *
524 * TODO: conditionally enable pku depending on the DMI BIOS version when Apple
525 * fixes the issue.
526 *
527 * However, this would be still not enough because DMI is missing when vmlinuz
528 * is directly loaded into VM.
529 */
> 530 if (!memcmp(acpi_gbl_FADT.header.oem_table_id, "Apple Vz", 8)) {
531 pr_info("pku: disabled on Apple Virtualization platform (Intel) due to a bug\n");
532 pku_disabled = true;
533 }
534
535 if (c == &boot_cpu_data) {
536 if (pku_disabled || !cpu_feature_enabled(X86_FEATURE_PKU))
537 return;
538 /*
539 * Setting CR4.PKE will cause the X86_FEATURE_OSPKE cpuid
540 * bit to be set. Enforce it.
541 */
542 setup_force_cpu_cap(X86_FEATURE_OSPKE);
543
544 } else if (!cpu_feature_enabled(X86_FEATURE_OSPKE)) {
545 return;
546 }
547
548 cr4_set_bits(X86_CR4_PKE);
549 /* Load the default PKRU value */
550 pkru_write_default();
551 }
552
--
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki
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