Hi David, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on linus/master] [also build test WARNING on v5.8-rc1 next-20200618] [cannot apply to kvmarm/next arm64/for-next/core arm-perf/for-next/perf] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/David-Brazdil/Split-off-nVHE-hyp... base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 1b5044021070efa3259f3e9548dc35d1eb6aa844 config: arm64-allyesconfig (attached as .config) compiler: aarch64-linux-gcc (GCC) 9.3.0 reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): In file included from include/linux/kvm_host.h:36, from arch/arm64/kvm/arm.c:11: arch/arm64/kvm/arm.c: In function 'kvm_arch_vcpu_ioctl_run': 460 | typeof(f(__VA_ARGS__)) ret; | ^~~ 488 | ret = kvm_call_hyp_nvhe_ret(f, ##__VA_ARGS__); | ^~~~~~~~~~~~~~~~~~~~~ 754 | ret = kvm_call_hyp_ret(__kvm_vcpu_run_nvhe, vcpu); | ^~~~~~~~~~~~~~~~ -- In file included from arch/arm64/include/asm/percpu.h:228, from arch/arm64/include/asm/smp.h:28, from include/linux/smp.h:89, from include/linux/percpu.h:7, from include/linux/context_tracking_state.h:5, from include/linux/hardirq.h:5, from include/linux/kvm_host.h:7, from arch/arm64/kvm/debug.c:9: arch/arm64/kvm/debug.c: In function 'kvm_arm_init_debug': 460 | typeof(f(__VA_ARGS__)) ret; | ^~~ include/asm-generic/percpu.h:72:26: note: in definition of macro 'raw_cpu_generic_to_op' 72 | *raw_cpu_ptr(&(pcp)) op val; | ^~~ include/linux/percpu-defs.h:377:11: note: in expansion of macro 'raw_cpu_write_1' 377 | case 1: stem##1(variable, __VA_ARGS__);break; | ^~~~ include/linux/percpu-defs.h:421:34: note: in expansion of macro '__pcpu_size_call' 421 | #define raw_cpu_write(pcp, val) __pcpu_size_call(raw_cpu_write_, pcp, val) | ^~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:452:2: note: in expansion of macro 'raw_cpu_write' 452 | raw_cpu_write(pcp, val); | ^~~~~~~~~~~~~ 68 | __this_cpu_write(mdcr_el2, kvm_call_hyp_ret(__kvm_get_mdcr_el2)); | ^~~~~~~~~~~~~~~~ 488 | ret = kvm_call_hyp_nvhe_ret(f, ##__VA_ARGS__); | ^~~~~~~~~~~~~~~~~~~~~ 68 | __this_cpu_write(mdcr_el2, kvm_call_hyp_ret(__kvm_get_mdcr_el2)); | ^~~~~~~~~~~~~~~~ 460 | typeof(f(__VA_ARGS__)) ret; | ^~~ include/asm-generic/percpu.h:72:26: note: in definition of macro 'raw_cpu_generic_to_op' 72 | *raw_cpu_ptr(&(pcp)) op val; | ^~~ include/linux/percpu-defs.h:378:11: note: in expansion of macro 'raw_cpu_write_2' 378 | case 2: stem##2(variable, __VA_ARGS__);break; | ^~~~ include/linux/percpu-defs.h:421:34: note: in expansion of macro '__pcpu_size_call' 421 | #define raw_cpu_write(pcp, val) __pcpu_size_call(raw_cpu_write_, pcp, val) | ^~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:452:2: note: in expansion of macro 'raw_cpu_write' 452 | raw_cpu_write(pcp, val); | ^~~~~~~~~~~~~ 68 | __this_cpu_write(mdcr_el2, kvm_call_hyp_ret(__kvm_get_mdcr_el2)); | ^~~~~~~~~~~~~~~~ 488 | ret = kvm_call_hyp_nvhe_ret(f, ##__VA_ARGS__); | ^~~~~~~~~~~~~~~~~~~~~ 68 | __this_cpu_write(mdcr_el2, kvm_call_hyp_ret(__kvm_get_mdcr_el2)); | ^~~~~~~~~~~~~~~~ 460 | typeof(f(__VA_ARGS__)) ret; | ^~~ include/asm-generic/percpu.h:72:26: note: in definition of macro 'raw_cpu_generic_to_op' 72 | *raw_cpu_ptr(&(pcp)) op val; | ^~~ include/linux/percpu-defs.h:379:11: note: in expansion of macro 'raw_cpu_write_4' 379 | case 4: stem##4(variable, __VA_ARGS__);break; | ^~~~ include/linux/percpu-defs.h:421:34: note: in expansion of macro '__pcpu_size_call' 421 | #define raw_cpu_write(pcp, val) __pcpu_size_call(raw_cpu_write_, pcp, val) | ^~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:452:2: note: in expansion of macro 'raw_cpu_write' 452 | raw_cpu_write(pcp, val); | ^~~~~~~~~~~~~ 68 | __this_cpu_write(mdcr_el2, kvm_call_hyp_ret(__kvm_get_mdcr_el2)); | ^~~~~~~~~~~~~~~~ 488 | ret = kvm_call_hyp_nvhe_ret(f, ##__VA_ARGS__); | ^~~~~~~~~~~~~~~~~~~~~ 68 | __this_cpu_write(mdcr_el2, kvm_call_hyp_ret(__kvm_get_mdcr_el2)); | ^~~~~~~~~~~~~~~~ 460 | typeof(f(__VA_ARGS__)) ret; | ^~~ include/asm-generic/percpu.h:72:26: note: in definition of macro 'raw_cpu_generic_to_op' 72 | *raw_cpu_ptr(&(pcp)) op val; | ^~~ include/linux/percpu-defs.h:380:11: note: in expansion of macro 'raw_cpu_write_8' 380 | case 8: stem##8(variable, __VA_ARGS__);break; | ^~~~ include/linux/percpu-defs.h:421:34: note: in expansion of macro '__pcpu_size_call' 421 | #define raw_cpu_write(pcp, val) __pcpu_size_call(raw_cpu_write_, pcp, val) | ^~~~~~~~~~~~~~~~ include/linux/percpu-defs.h:452:2: note: in expansion of macro 'raw_cpu_write' 452 | raw_cpu_write(pcp, val); | ^~~~~~~~~~~~~ 68 | __this_cpu_write(mdcr_el2, kvm_call_hyp_ret(__kvm_get_mdcr_el2)); | ^~~~~~~~~~~~~~~~ 488 | ret = kvm_call_hyp_nvhe_ret(f, ##__VA_ARGS__); | ^~~~~~~~~~~~~~~~~~~~~ 68 | __this_cpu_write(mdcr_el2, kvm_call_hyp_ret(__kvm_get_mdcr_el2)); | ^~~~~~~~~~~~~~~~ -- In file included from include/linux/kvm_host.h:36, from arch/arm64/kvm/vgic/vgic-v3.c:5: arch/arm64/kvm/vgic/vgic-v3.c: In function 'vgic_v3_probe': 460 | typeof(f(__VA_ARGS__)) ret; | ^~~ 488 | ret = kvm_call_hyp_nvhe_ret(f, ##__VA_ARGS__); | ^~~~~~~~~~~~~~~~~~~~~ 586 | u32 ich_vtr_el2 = kvm_call_hyp_ret(__vgic_v3_get_ich_vtr_el2); | ^~~~~~~~~~~~~~~~ arch/arm64/kvm/vgic/vgic-v3.c: In function 'vgic_v3_vmcr_sync': 460 | typeof(f(__VA_ARGS__)) ret; | ^~~ 488 | ret = kvm_call_hyp_nvhe_ret(f, ##__VA_ARGS__); | ^~~~~~~~~~~~~~~~~~~~~ arch/arm64/kvm/vgic/vgic-v3.c:678:23: note: in expansion of macro 'kvm_call_hyp_ret' 678 | cpu_if->vgic_vmcr = kvm_call_hyp_ret(__vgic_v3_read_vmcr); | ^~~~~~~~~~~~~~~~ vim +/ret +460 arch/arm64/include/asm/kvm_host.h 450 451 #define kvm_call_hyp_nvhe(f, ...) \ 452 do { \ 453 DECLARE_KVM_NVHE_SYM(f); \ 454 __kvm_call_hyp(kvm_ksym_ref_nvhe(f), ##__VA_ARGS__); \ 455 } while(0) 456 457 #define kvm_call_hyp_nvhe_ret(f, ...) \ 458 ({ \ 459 DECLARE_KVM_NVHE_SYM(f); \ 461 ret = __kvm_call_hyp(kvm_ksym_ref_nvhe(f), \ 462 ##__VA_ARGS__); \ 463 }) 464 465 /* 466 * The couple of isb() below are there to guarantee the same behaviour 467 * on VHE as on !VHE, where the eret to EL1 acts as a context 468 * synchronization event. 469 */ 470 #define kvm_call_hyp(f, ...) \ 471 do { \ 472 if (has_vhe()) { \ 473 f(__VA_ARGS__); \ 474 isb(); \ 475 } else { \ 476 kvm_call_hyp_nvhe(f, ##__VA_ARGS__); \ 477 } \ 478 } while(0) 479 480 #define kvm_call_hyp_ret(f, ...) \ 481 ({ \ 482 typeof(f(__VA_ARGS__)) ret; \ 483 \ 484 if (has_vhe()) { \ 485 ret = f(__VA_ARGS__); \ 486 isb(); \ 487 } else { \ 489 } \ 490 \ 491 ret; \ 492 }) 493 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org