Hi Jason, kernel test robot noticed the following build errors: [auto build test ERROR on tip/x86/core] [also build test ERROR on v6.5] [cannot apply to rafael-pm/linux-next linus/master next-20230906] [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/Jason-Andryuk/acpi-processor-sanitize-_PDC-buffer-bits-when-running-as-Xen-dom0/20230907-022235 base: tip/x86/core patch link: https://lore.kernel.org/r/20230906182125.48642-1-jandryuk%40gmail.com patch subject: [PATCH v2] acpi/processor: sanitize _PDC buffer bits when running as Xen dom0 config: x86_64-randconfig-r011-20230907 (https://download.01.org/0day-ci/archive/20230907/202309070625.dJUDcGZg-lkp@xxxxxxxxx/config) compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230907/202309070625.dJUDcGZg-lkp@xxxxxxxxx/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@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202309070625.dJUDcGZg-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): drivers/acpi/processor_pdc.c: In function 'acpi_processor_eval_pdc': >> drivers/acpi/processor_pdc.c:147:17: error: implicit declaration of function 'xen_sanitize_pdc' [-Werror=implicit-function-declaration] 147 | xen_sanitize_pdc(buffer); | ^~~~~~~~~~~~~~~~ cc1: some warnings being treated as errors vim +/xen_sanitize_pdc +147 drivers/acpi/processor_pdc.c 116 117 /* 118 * _PDC is required for a BIOS-OS handshake for most of the newer 119 * ACPI processor features. 120 */ 121 static acpi_status 122 acpi_processor_eval_pdc(acpi_handle handle, struct acpi_object_list *pdc_in) 123 { 124 acpi_status status = AE_OK; 125 union acpi_object *obj; 126 u32 *buffer = NULL; 127 128 obj = pdc_in->pointer; 129 buffer = (u32 *)(obj->buffer.pointer); 130 131 if (boot_option_idle_override == IDLE_NOMWAIT) { 132 /* 133 * If mwait is disabled for CPU C-states, the C2C3_FFH access 134 * mode will be disabled in the parameter of _PDC object. 135 * Of course C1_FFH access mode will also be disabled. 136 */ 137 buffer[2] &= ~(ACPI_PDC_C_C2C3_FFH | ACPI_PDC_C_C1_FFH); 138 } 139 140 if (xen_initial_domain()) { 141 /* 142 * When Linux is running as Xen dom0, the hypervisor is the 143 * entity in charge of the processor power management, and so 144 * Xen needs to check the OS capabilities reported in the _PDC 145 * buffer matches what the hypervisor driver supports. 146 */ > 147 xen_sanitize_pdc(buffer); 148 } 149 150 status = acpi_evaluate_object(handle, "_PDC", pdc_in, NULL); 151 152 if (ACPI_FAILURE(status)) 153 acpi_handle_debug(handle, 154 "Could not evaluate _PDC, using legacy perf control\n"); 155 156 return status; 157 } 158 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
