Hi Michael, [auto build test ERROR on kvm/linux-next] [also build test ERROR on v4.11-rc2 next-20170310] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
url: https://github.com/0day-ci/linux/commits/Michael-S-Tsirkin/kvm-better-MWAIT-emulation-for-guests/20170316-143518 base: https://git.kernel.org/pub/scm/virt/kvm/kvm.git linux-next config: x86_64-randconfig-x010-201711 (attached as .config) compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 All error/warnings (new ones prefixed by >>): In file included from arch/x86/kvm/x86.c:28:0: arch/x86/kvm/x86.h: In function 'kvm_mwait_in_guest': >> arch/x86/kvm/x86.h:231:34: error: 'CPUID_MWAIT_LEAF' undeclared (first use >> in this function) if (boot_cpu_data.cpuid_level < CPUID_MWAIT_LEAF) ^~~~~~~~~~~~~~~~ arch/x86/kvm/x86.h:231:34: note: each undeclared identifier is reported only once for each function it appears in >> arch/x86/kvm/x86.h:234:45: error: 'mwait_substates' undeclared (first use in >> this function) cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &mwait_substates); ^~~~~~~~~~~~~~~ >> arch/x86/kvm/x86.h:236:14: error: 'CPUID5_ECX_INTERRUPT_BREAK' undeclared >> (first use in this function) if (!(ecx & CPUID5_ECX_INTERRUPT_BREAK)) ^~~~~~~~~~~~~~~~~~~~~~~~~~ >> arch/x86/kvm/x86.h:238:1: warning: control reaches end of non-void function >> [-Wreturn-type] } ^ -- In file included from arch/x86/kvm/mmu.c:23:0: arch/x86/kvm/x86.h: In function 'kvm_mwait_in_guest': >> arch/x86/kvm/x86.h:231:34: error: 'CPUID_MWAIT_LEAF' undeclared (first use >> in this function) if (boot_cpu_data.cpuid_level < CPUID_MWAIT_LEAF) ^~~~~~~~~~~~~~~~ arch/x86/kvm/x86.h:231:34: note: each undeclared identifier is reported only once for each function it appears in >> arch/x86/kvm/x86.h:234:45: error: 'mwait_substates' undeclared (first use in >> this function) cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &mwait_substates); ^~~~~~~~~~~~~~~ >> arch/x86/kvm/x86.h:236:14: error: 'CPUID5_ECX_INTERRUPT_BREAK' undeclared >> (first use in this function) if (!(ecx & CPUID5_ECX_INTERRUPT_BREAK)) ^~~~~~~~~~~~~~~~~~~~~~~~~~ At top level: arch/x86/kvm/x86.h:216:13: warning: 'kvm_mwait_in_guest' defined but not used [-Wunused-function] static bool kvm_mwait_in_guest(void) ^~~~~~~~~~~~~~~~~~ vim +/CPUID_MWAIT_LEAF +231 arch/x86/kvm/x86.h 225 226 /* 227 * Intel CPUs without CPUID5_ECX_INTERRUPT_BREAK are problematic as 228 * they would allow guest to stop the CPU completely by disabling 229 * interrupts then invoking MWAIT. 230 */ > 231 if (boot_cpu_data.cpuid_level < CPUID_MWAIT_LEAF) 232 return -ENODEV; 233 > 234 cpuid(CPUID_MWAIT_LEAF, &eax, &ebx, &ecx, &mwait_substates); 235 > 236 if (!(ecx & CPUID5_ECX_INTERRUPT_BREAK)) 237 return -ENODEV; > 238 } 239 240 #endif --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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