tree: https://git.kernel.org/pub/scm/virt/kvm/kvm.git queue head: 21f7d796fb43e13f71746be37985da90df27e66e commit: f84a54c045404f00bd77bf64233dad52149a6361 [75/78] KVM: SVM: Use asm goto to handle unexpected #UD on SVM instructions config: i386-randconfig-a004-20210202 (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=f84a54c045404f00bd77bf64233dad52149a6361 git remote add kvm https://git.kernel.org/pub/scm/virt/kvm/kvm.git git fetch --no-tags kvm queue git checkout f84a54c045404f00bd77bf64233dad52149a6361 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): In file included from include/linux/compiler_types.h:85, from <command-line>: arch/x86/kvm/svm/sev.c: In function 'sev_es_vcpu_load': >> include/linux/compiler-gcc.h:96:38: error: inconsistent operand constraints in an 'asm' 96 | #define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0) | ^~~ arch/x86/kvm/svm/svm_ops.h:21:2: note: in expansion of macro 'asm_volatile_goto' 21 | asm_volatile_goto("1: " __stringify(insn) " %0\n\t" \ | ^~~~~~~~~~~~~~~~~ arch/x86/kvm/svm/svm_ops.h:56:2: note: in expansion of macro 'svm_asm1' 56 | svm_asm1(vmsave, "a" (pa), "memory"); | ^~~~~~~~ vim +/asm +96 include/linux/compiler-gcc.h 313dd1b629219d Kees Cook 2017-05-05 86 cb984d101b30eb Joe Perches 2015-06-25 87 /* cb984d101b30eb Joe Perches 2015-06-25 88 * GCC 'asm goto' miscompiles certain code sequences: cb984d101b30eb Joe Perches 2015-06-25 89 * cb984d101b30eb Joe Perches 2015-06-25 90 * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670 cb984d101b30eb Joe Perches 2015-06-25 91 * cb984d101b30eb Joe Perches 2015-06-25 92 * Work it around via a compiler barrier quirk suggested by Jakub Jelinek. cb984d101b30eb Joe Perches 2015-06-25 93 * cb984d101b30eb Joe Perches 2015-06-25 94 * (asm goto is automatically volatile - the naming reflects this.) cb984d101b30eb Joe Perches 2015-06-25 95 */ cb984d101b30eb Joe Perches 2015-06-25 @96 #define asm_volatile_goto(x...) do { asm goto(x); asm (""); } while (0) cb984d101b30eb Joe Perches 2015-06-25 97 :::::: The code at line 96 was first introduced by commit :::::: cb984d101b30eb7478d32df56a0023e4603cba7f compiler-gcc: integrate the various compiler-gcc[345].h files :::::: TO: Joe Perches <joe@xxxxxxxxxxx> :::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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