[kbuild-all] [linuxppc:next-test 92/92] arch/powerpc/kernel/kvm_emul.S:132: Error: non-constant expression in ".if" statement

Hi Christophe, First bad commit (maybe != root cause): tree: https://github.com/linuxppc/linux next-test head: 579a7abaf051ef84dd24cf19e6541455e7df72ce commit: 579a7abaf051ef84dd24cf19e6541455e7df72ce [92/92] powerpc: Define and use MSR_RI only on non booke/40x config: powerpc-randconfig-c024-20210821 (attached as .config) compiler: powerpc64-linux-gcc (GCC) 11.2.0 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 # https://github.com/linuxppc/linux/commit/579a7abaf051ef84dd24cf19e6541455... git remote add linuxppc https://github.com/linuxppc/linux git fetch --no-tags linuxppc next-test git checkout 579a7abaf051ef84dd24cf19e6541455e7df72ce # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): arch/powerpc/kernel/kvm_emul.S: Assembler messages: arch/powerpc/kernel/kvm_emul.S:60: Error: invalid operands (*ABS* and *UND* sections) for `|' arch/powerpc/kernel/kvm_emul.S:66: Error: invalid operands (*ABS* and *UND* sections) for `|' arch/powerpc/kernel/kvm_emul.S:132: Error: invalid operands (*ABS* and *UND* sections) for `|' vim +132 arch/powerpc/kernel/kvm_emul.S 92234722ed631f Alexander Graf 2010-07-29 26 92234722ed631f Alexander Graf 2010-07-29 27 #define SCRATCH_SAVE \ 92234722ed631f Alexander Graf 2010-07-29 28 /* Enable critical section. We are critical if \ 92234722ed631f Alexander Graf 2010-07-29 29 shared->critical == r1 */ \ 92234722ed631f Alexander Graf 2010-07-29 30 STL64(r1, KVM_MAGIC_PAGE + KVM_MAGIC_CRITICAL, 0); \ 92234722ed631f Alexander Graf 2010-07-29 31 \ 92234722ed631f Alexander Graf 2010-07-29 32 /* Save state */ \ 92234722ed631f Alexander Graf 2010-07-29 33 PPC_STL r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH1)(0); \ 92234722ed631f Alexander Graf 2010-07-29 34 PPC_STL r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH2)(0); \ 92234722ed631f Alexander Graf 2010-07-29 35 mfcr r31; \ 92234722ed631f Alexander Graf 2010-07-29 36 stw r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH3)(0); 92234722ed631f Alexander Graf 2010-07-29 37 92234722ed631f Alexander Graf 2010-07-29 38 #define SCRATCH_RESTORE \ 92234722ed631f Alexander Graf 2010-07-29 39 /* Restore state */ \ 92234722ed631f Alexander Graf 2010-07-29 40 PPC_LL r31, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH1)(0); \ 92234722ed631f Alexander Graf 2010-07-29 41 lwz r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH3)(0); \ 92234722ed631f Alexander Graf 2010-07-29 42 mtcr r30; \ 92234722ed631f Alexander Graf 2010-07-29 43 PPC_LL r30, (KVM_MAGIC_PAGE + KVM_MAGIC_SCRATCH2)(0); \ 92234722ed631f Alexander Graf 2010-07-29 44 \ 92234722ed631f Alexander Graf 2010-07-29 45 /* Disable critical section. We are critical if \ 92234722ed631f Alexander Graf 2010-07-29 46 shared->critical == r1 and r2 is always != r1 */ \ 92234722ed631f Alexander Graf 2010-07-29 47 STL64(r2, KVM_MAGIC_PAGE + KVM_MAGIC_CRITICAL, 0); 819a63dc792b08 Alexander Graf 2010-07-29 48 befdc0a65afd17 Liu Yu-B13201 2011-12-01 49 .global kvm_template_start befdc0a65afd17 Liu Yu-B13201 2011-12-01 50 kvm_template_start: befdc0a65afd17 Liu Yu-B13201 2011-12-01 51 819a63dc792b08 Alexander Graf 2010-07-29 52 .global kvm_emulate_mtmsrd 819a63dc792b08 Alexander Graf 2010-07-29 53 kvm_emulate_mtmsrd: 819a63dc792b08 Alexander Graf 2010-07-29 54 819a63dc792b08 Alexander Graf 2010-07-29 55 SCRATCH_SAVE 819a63dc792b08 Alexander Graf 2010-07-29 56 819a63dc792b08 Alexander Graf 2010-07-29 57 /* Put MSR & ~(MSR_EE|MSR_RI) in r31 */ 819a63dc792b08 Alexander Graf 2010-07-29 58 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0) 819a63dc792b08 Alexander Graf 2010-07-29 @59 lis r30, (~(MSR_EE | MSR_RI))@h 819a63dc792b08 Alexander Graf 2010-07-29 60 ori r30, r30, (~(MSR_EE | MSR_RI))@l 819a63dc792b08 Alexander Graf 2010-07-29 61 and r31, r31, r30 819a63dc792b08 Alexander Graf 2010-07-29 62 819a63dc792b08 Alexander Graf 2010-07-29 63 /* OR the register's (MSR_EE|MSR_RI) on MSR */ 819a63dc792b08 Alexander Graf 2010-07-29 64 kvm_emulate_mtmsrd_reg: df08bd10266ce6 Alexander Graf 2010-08-05 65 ori r30, r0, 0 df08bd10266ce6 Alexander Graf 2010-08-05 66 andi. r30, r30, (MSR_EE|MSR_RI) 819a63dc792b08 Alexander Graf 2010-07-29 67 or r31, r31, r30 819a63dc792b08 Alexander Graf 2010-07-29 68 819a63dc792b08 Alexander Graf 2010-07-29 69 /* Put MSR back into magic page */ 819a63dc792b08 Alexander Graf 2010-07-29 70 STL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0) 819a63dc792b08 Alexander Graf 2010-07-29 71 819a63dc792b08 Alexander Graf 2010-07-29 72 /* Check if we have to fetch an interrupt */ 819a63dc792b08 Alexander Graf 2010-07-29 73 lwz r31, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0) 819a63dc792b08 Alexander Graf 2010-07-29 74 cmpwi r31, 0 819a63dc792b08 Alexander Graf 2010-07-29 75 beq+ no_check 819a63dc792b08 Alexander Graf 2010-07-29 76 819a63dc792b08 Alexander Graf 2010-07-29 77 /* Check if we may trigger an interrupt */ 819a63dc792b08 Alexander Graf 2010-07-29 78 andi. r30, r30, MSR_EE 819a63dc792b08 Alexander Graf 2010-07-29 79 beq no_check 819a63dc792b08 Alexander Graf 2010-07-29 80 819a63dc792b08 Alexander Graf 2010-07-29 81 SCRATCH_RESTORE 819a63dc792b08 Alexander Graf 2010-07-29 82 819a63dc792b08 Alexander Graf 2010-07-29 83 /* Nag hypervisor */ df08bd10266ce6 Alexander Graf 2010-08-05 84 kvm_emulate_mtmsrd_orig_ins: 819a63dc792b08 Alexander Graf 2010-07-29 85 tlbsync 819a63dc792b08 Alexander Graf 2010-07-29 86 819a63dc792b08 Alexander Graf 2010-07-29 87 b kvm_emulate_mtmsrd_branch 819a63dc792b08 Alexander Graf 2010-07-29 88 819a63dc792b08 Alexander Graf 2010-07-29 89 no_check: 819a63dc792b08 Alexander Graf 2010-07-29 90 819a63dc792b08 Alexander Graf 2010-07-29 91 SCRATCH_RESTORE 819a63dc792b08 Alexander Graf 2010-07-29 92 819a63dc792b08 Alexander Graf 2010-07-29 93 /* Go back to caller */ 819a63dc792b08 Alexander Graf 2010-07-29 94 kvm_emulate_mtmsrd_branch: 819a63dc792b08 Alexander Graf 2010-07-29 95 b . 819a63dc792b08 Alexander Graf 2010-07-29 96 kvm_emulate_mtmsrd_end: 819a63dc792b08 Alexander Graf 2010-07-29 97 819a63dc792b08 Alexander Graf 2010-07-29 98 .global kvm_emulate_mtmsrd_branch_offs 819a63dc792b08 Alexander Graf 2010-07-29 99 kvm_emulate_mtmsrd_branch_offs: 819a63dc792b08 Alexander Graf 2010-07-29 100 .long (kvm_emulate_mtmsrd_branch - kvm_emulate_mtmsrd) / 4 819a63dc792b08 Alexander Graf 2010-07-29 101 819a63dc792b08 Alexander Graf 2010-07-29 102 .global kvm_emulate_mtmsrd_reg_offs 819a63dc792b08 Alexander Graf 2010-07-29 103 kvm_emulate_mtmsrd_reg_offs: 819a63dc792b08 Alexander Graf 2010-07-29 104 .long (kvm_emulate_mtmsrd_reg - kvm_emulate_mtmsrd) / 4 819a63dc792b08 Alexander Graf 2010-07-29 105 df08bd10266ce6 Alexander Graf 2010-08-05 106 .global kvm_emulate_mtmsrd_orig_ins_offs df08bd10266ce6 Alexander Graf 2010-08-05 107 kvm_emulate_mtmsrd_orig_ins_offs: df08bd10266ce6 Alexander Graf 2010-08-05 108 .long (kvm_emulate_mtmsrd_orig_ins - kvm_emulate_mtmsrd) / 4 df08bd10266ce6 Alexander Graf 2010-08-05 109 819a63dc792b08 Alexander Graf 2010-07-29 110 .global kvm_emulate_mtmsrd_len 819a63dc792b08 Alexander Graf 2010-07-29 111 kvm_emulate_mtmsrd_len: 819a63dc792b08 Alexander Graf 2010-07-29 112 .long (kvm_emulate_mtmsrd_end - kvm_emulate_mtmsrd) / 4 7810927760a0d1 Alexander Graf 2010-07-29 113 7810927760a0d1 Alexander Graf 2010-07-29 114 d35b1075afc017 Bharat Bhushan 2012-05-20 115 #define MSR_SAFE_BITS (MSR_EE | MSR_RI) 7810927760a0d1 Alexander Graf 2010-07-29 116 #define MSR_CRITICAL_BITS ~MSR_SAFE_BITS 7810927760a0d1 Alexander Graf 2010-07-29 117 7810927760a0d1 Alexander Graf 2010-07-29 118 .global kvm_emulate_mtmsr 7810927760a0d1 Alexander Graf 2010-07-29 119 kvm_emulate_mtmsr: 7810927760a0d1 Alexander Graf 2010-07-29 120 7810927760a0d1 Alexander Graf 2010-07-29 121 SCRATCH_SAVE 7810927760a0d1 Alexander Graf 2010-07-29 122 7810927760a0d1 Alexander Graf 2010-07-29 123 /* Fetch old MSR in r31 */ 7810927760a0d1 Alexander Graf 2010-07-29 124 LL64(r31, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0) 7810927760a0d1 Alexander Graf 2010-07-29 125 7810927760a0d1 Alexander Graf 2010-07-29 126 /* Find the changed bits between old and new MSR */ 7810927760a0d1 Alexander Graf 2010-07-29 127 kvm_emulate_mtmsr_reg1: 512ba59ed9c580 Alexander Graf 2010-08-05 128 ori r30, r0, 0 512ba59ed9c580 Alexander Graf 2010-08-05 129 xor r31, r30, r31 7810927760a0d1 Alexander Graf 2010-07-29 130 7810927760a0d1 Alexander Graf 2010-07-29 131 /* Check if we need to really do mtmsr */ 7810927760a0d1 Alexander Graf 2010-07-29 @132 LOAD_REG_IMMEDIATE(r30, MSR_CRITICAL_BITS) 7810927760a0d1 Alexander Graf 2010-07-29 133 and. r31, r31, r30 7810927760a0d1 Alexander Graf 2010-07-29 134 7810927760a0d1 Alexander Graf 2010-07-29 135 /* No critical bits changed? Maybe we can stay in the guest. */ 7810927760a0d1 Alexander Graf 2010-07-29 136 beq maybe_stay_in_guest 7810927760a0d1 Alexander Graf 2010-07-29 137 7810927760a0d1 Alexander Graf 2010-07-29 138 do_mtmsr: 7810927760a0d1 Alexander Graf 2010-07-29 139 7810927760a0d1 Alexander Graf 2010-07-29 140 SCRATCH_RESTORE 7810927760a0d1 Alexander Graf 2010-07-29 141 7810927760a0d1 Alexander Graf 2010-07-29 142 /* Just fire off the mtmsr if it's critical */ 7810927760a0d1 Alexander Graf 2010-07-29 143 kvm_emulate_mtmsr_orig_ins: 7810927760a0d1 Alexander Graf 2010-07-29 144 mtmsr r0 7810927760a0d1 Alexander Graf 2010-07-29 145 7810927760a0d1 Alexander Graf 2010-07-29 146 b kvm_emulate_mtmsr_branch 7810927760a0d1 Alexander Graf 2010-07-29 147 7810927760a0d1 Alexander Graf 2010-07-29 148 maybe_stay_in_guest: 7810927760a0d1 Alexander Graf 2010-07-29 149 512ba59ed9c580 Alexander Graf 2010-08-05 150 /* Get the target register in r30 */ 512ba59ed9c580 Alexander Graf 2010-08-05 151 kvm_emulate_mtmsr_reg2: 512ba59ed9c580 Alexander Graf 2010-08-05 152 ori r30, r0, 0 512ba59ed9c580 Alexander Graf 2010-08-05 153 f9208427f72e6c Bharat Bhushan 2011-10-13 154 /* Put MSR into magic page because we don't call mtmsr */ f9208427f72e6c Bharat Bhushan 2011-10-13 155 STL64(r30, KVM_MAGIC_PAGE + KVM_MAGIC_MSR, 0) f9208427f72e6c Bharat Bhushan 2011-10-13 156 7810927760a0d1 Alexander Graf 2010-07-29 157 /* Check if we have to fetch an interrupt */ 7810927760a0d1 Alexander Graf 2010-07-29 158 lwz r31, (KVM_MAGIC_PAGE + KVM_MAGIC_INT)(0) 7810927760a0d1 Alexander Graf 2010-07-29 159 cmpwi r31, 0 7810927760a0d1 Alexander Graf 2010-07-29 160 beq+ no_mtmsr 7810927760a0d1 Alexander Graf 2010-07-29 161 7810927760a0d1 Alexander Graf 2010-07-29 162 /* Check if we may trigger an interrupt */ 512ba59ed9c580 Alexander Graf 2010-08-05 163 andi. r31, r30, MSR_EE f9208427f72e6c Bharat Bhushan 2011-10-13 164 bne do_mtmsr 7810927760a0d1 Alexander Graf 2010-07-29 165 7810927760a0d1 Alexander Graf 2010-07-29 166 no_mtmsr: 7810927760a0d1 Alexander Graf 2010-07-29 167 7810927760a0d1 Alexander Graf 2010-07-29 168 SCRATCH_RESTORE 7810927760a0d1 Alexander Graf 2010-07-29 169 7810927760a0d1 Alexander Graf 2010-07-29 170 /* Go back to caller */ 7810927760a0d1 Alexander Graf 2010-07-29 171 kvm_emulate_mtmsr_branch: 7810927760a0d1 Alexander Graf 2010-07-29 172 b . 7810927760a0d1 Alexander Graf 2010-07-29 173 kvm_emulate_mtmsr_end: 7810927760a0d1 Alexander Graf 2010-07-29 174 :::::: The code at line 132 was first introduced by commit :::::: 7810927760a0d16d7a41be4dab895fbbf9445bc0 KVM: PPC: PV mtmsrd L=0 and mtmsr :::::: TO: Alexander Graf <agraf(a)suse.de&gt; :::::: CC: Avi Kivity <avi(a)redhat.com&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org