Hi Dirk, First bad commit (maybe != root cause): tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git queue/4.14 head: 93489bfff5495e498b3932e011b0221ff242e0b7 commit: 88f7a6aa7fb9aa5076b65489146045dac865f1d3 [3742/9999] scripts/dtc: Remove redundant YYLOC global declaration config: powerpc-randconfig-r003-20211214 (https://download.01.org/0day-ci/archive/20211215/202112151740.QoiLaP9D-lk...) compiler: powerpc-linux-gcc (GCC) 7.5.0 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://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.gi... git remote add linux-stable-rc https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable-rc.git git fetch --no-tags linux-stable-rc queue/4.14 git checkout 88f7a6aa7fb9aa5076b65489146045dac865f1d3 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-7.5.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash 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 >>): In file included from include/linux/uaccess.h:14:0, from arch/powerpc/include/asm/sections.h:7, from include/linux/interrupt.h:22, from arch/powerpc/kernel/traps.c:27: arch/powerpc/kernel/traps.c: In function 'emulate_string_inst': arch/powerpc/include/asm/uaccess.h:52:35: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits] (((size) == 0) || (((size) - 1) <= ((segment).seg - (addr))))) ^ arch/powerpc/include/asm/uaccess.h:58:3: note: in expansion of macro '__access_ok' __access_ok((__force unsigned long)(addr), (size), get_fs())) ^~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:253:6: note: in expansion of macro 'access_ok' if (access_ok(VERIFY_READ, __gu_addr, (size))) { \ ^~~~~~~~~ arch/powerpc/include/asm/uaccess.h:80:2: note: in expansion of macro '__get_user_check' __get_user_check((x), (ptr), sizeof(*(ptr))) ^~~~~~~~~~~~~~~~ arch/powerpc/kernel/traps.c:889:9: note: in expansion of macro 'get_user' if (get_user(val, (u8 __user *)EA)) ^~~~~~~~ arch/powerpc/include/asm/uaccess.h:52:35: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits] (((size) == 0) || (((size) - 1) <= ((segment).seg - (addr))))) ^ arch/powerpc/include/asm/uaccess.h:58:3: note: in expansion of macro '__access_ok' __access_ok((__force unsigned long)(addr), (size), get_fs())) ^~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:160:6: note: in expansion of macro 'access_ok' if (access_ok(VERIFY_WRITE, __pu_addr, size)) \ ^~~~~~~~~ arch/powerpc/include/asm/uaccess.h:82:2: note: in expansion of macro '__put_user_check' __put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr))) ^~~~~~~~~~~~~~~~ arch/powerpc/kernel/traps.c:900:9: note: in expansion of macro 'put_user' if (put_user(val, (u8 __user *)EA)) ^~~~~~~~ arch/powerpc/kernel/traps.c: At top level: arch/powerpc/kernel/traps.c:1281:6: error: no previous declaration for 'slb_miss_bad_addr' [-Werror=missing-declarations] void slb_miss_bad_addr(struct pt_regs *regs) ^~~~~~~~~~~~~~~~~ void DebugException(struct pt_regs *regs, unsigned long debug_status) ^~~~~~~~~~~~~~ void CacheLockingException(struct pt_regs *regs, unsigned long address, ^~~~~~~~~~~~~~~~~~~~~ arch/powerpc/kernel/traps.c:1785:6: error: no previous declaration for 'SPEFloatingPointException' [-Werror=missing-declarations] void SPEFloatingPointException(struct pt_regs *regs) ^~~~~~~~~~~~~~~~~~~~~~~~~ void SPEFloatingPointRoundException(struct pt_regs *regs) ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ arch/powerpc/kernel/traps.c:1884:29: error: no previous declaration for 'WatchdogHandler' [-Werror=missing-declarations] void __attribute__ ((weak)) WatchdogHandler(struct pt_regs *regs) ^~~~~~~~~~~~~~~ cc1: all warnings being treated as errors -- In file included from include/linux/uaccess.h:14:0, from include/asm-generic/termios-base.h:8, from arch/powerpc/include/asm/termios.h:20, from include/uapi/linux/termios.h:6, from include/linux/tty.h:7, from arch/powerpc/kernel/setup_32.c:13: include/asm-generic/termios-base.h: In function 'user_termio_to_kernel_termios': arch/powerpc/include/asm/uaccess.h:52:35: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits] (((size) == 0) || (((size) - 1) <= ((segment).seg - (addr))))) ^ arch/powerpc/include/asm/uaccess.h:58:3: note: in expansion of macro '__access_ok' __access_ok((__force unsigned long)(addr), (size), get_fs())) ^~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:253:6: note: in expansion of macro 'access_ok' if (access_ok(VERIFY_READ, __gu_addr, (size))) { \ ^~~~~~~~~ arch/powerpc/include/asm/uaccess.h:80:2: note: in expansion of macro '__get_user_check' __get_user_check((x), (ptr), sizeof(*(ptr))) ^~~~~~~~~~~~~~~~ include/asm-generic/termios-base.h:36:6: note: in expansion of macro 'get_user' if (get_user(termios->c_line, &termio->c_line) < 0) ^~~~~~~~ include/asm-generic/termios-base.h: In function 'kernel_termios_to_user_termio': arch/powerpc/include/asm/uaccess.h:52:35: error: comparison of unsigned expression >= 0 is always true [-Werror=type-limits] (((size) == 0) || (((size) - 1) <= ((segment).seg - (addr))))) ^ arch/powerpc/include/asm/uaccess.h:58:3: note: in expansion of macro '__access_ok' __access_ok((__force unsigned long)(addr), (size), get_fs())) ^~~~~~~~~~~ arch/powerpc/include/asm/uaccess.h:160:6: note: in expansion of macro 'access_ok' if (access_ok(VERIFY_WRITE, __pu_addr, size)) \ ^~~~~~~~~ arch/powerpc/include/asm/uaccess.h:82:2: note: in expansion of macro '__put_user_check' __put_user_check((__typeof__(*(ptr)))(x), (ptr), sizeof(*(ptr))) ^~~~~~~~~~~~~~~~ include/asm-generic/termios-base.h:58:6: note: in expansion of macro 'put_user' put_user(termios->c_line, &termio->c_line) < 0 || ^~~~~~~~ arch/powerpc/kernel/setup_32.c: At top level: arch/powerpc/kernel/setup_32.c:68:30: error: no previous declaration for 'early_init' [-Werror=missing-declarations] notrace unsigned long __init early_init(unsigned long dt_ptr) ^~~~~~~~~~ arch/powerpc/kernel/setup_32.c:99:21: error: no previous declaration for 'machine_init' [-Werror=missing-declarations] notrace void __init machine_init(u64 dt_ptr) ^~~~~~~~~~~~ arch/powerpc/kernel/setup_32.c:124:12: error: no previous declaration for 'ppc_setup_l2cr' [-Werror=missing-declarations] int __init ppc_setup_l2cr(char *str) ^~~~~~~~~~~~~~ arch/powerpc/kernel/setup_32.c:137:12: error: no previous declaration for 'ppc_setup_l3cr' [-Werror=missing-declarations] int __init ppc_setup_l3cr(char *str) ^~~~~~~~~~~~~~ arch/powerpc/kernel/setup_32.c:183:12: error: no previous declaration for 'ppc_init' [-Werror=missing-declarations] int __init ppc_init(void) ^~~~~~~~ arch/powerpc/kernel/setup_32.c:198:13: error: no previous declaration for 'irqstack_early_init' [-Werror=missing-declarations] void __init irqstack_early_init(void) ^~~~~~~~~~~~~~~~~~~ void __init exc_lvl_early_init(void) ^~~~~~~~~~~~~~~~~~ arch/powerpc/kernel/setup_32.c:238:13: error: no previous declaration for 'setup_power_save' [-Werror=missing-declarations] void __init setup_power_save(void) ^~~~~~~~~~~~~~~~ arch/powerpc/kernel/setup_32.c:253:13: error: no previous declaration for 'initialize_cache_info' [-Werror=missing-declarations] __init void initialize_cache_info(void) ^~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors -- unsigned long tlbcam_sz(int idx) ^~~~~~~~~ notrace void __init relocate_init(u64 dt_ptr, phys_addr_t start) ^~~~~~~~~~~~~ cc1: all warnings being treated as errors -- In file included from include/linux/hugetlb.h:444:0, from arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:50: arch/powerpc/include/asm/hugetlb.h: In function 'huge_ptep_clear_flush': arch/powerpc/include/asm/hugetlb.h:167:8: error: variable 'pte' set but not used [-Werror=unused-but-set-variable] pte_t pte; ^~~ arch/powerpc/kvm/../../../virt/kvm/kvm_main.c: At top level: __weak void kvm_arch_mmu_notifier_invalidate_range(struct kvm *kvm, ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ int __weak kvm_arch_post_init_vm(struct kvm *kvm) ^~~~~~~~~~~~~~~~~~~~~ void __weak kvm_arch_pre_destroy_vm(struct kvm *kvm) ^~~~~~~~~~~~~~~~~~~~~~~ In file included from include/linux/kvm_host.h:14:0, from arch/powerpc/kvm/../../../virt/kvm/kvm_main.c:21: include/linux/signal.h: In function 'sigemptyset': include/linux/signal.h:178:22: error: this statement may fall through [-Werror=implicit-fallthrough=] case 2: set->sig[1] = 0; ~~~~~~~~~~~~^~~ include/linux/signal.h:179:2: note: here case 1: set->sig[0] = 0; ^~~~ cc1: all warnings being treated as errors -- void kvmppc_watchdog_func(unsigned long data) ^~~~~~~~~~~~~~~~~~~~ int kvmppc_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu, ^~~~~~~~~~~~~~~~~~ void kvm_guest_protect_msr(struct kvm_vcpu *vcpu, ulong prot_bitmap, bool set) ^~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors -- In file included from include/linux/hugetlb.h:444:0, from arch/powerpc/kvm/e500_mmu.c:31: arch/powerpc/include/asm/hugetlb.h: In function 'huge_ptep_clear_flush': arch/powerpc/include/asm/hugetlb.h:167:8: error: variable 'pte' set but not used [-Werror=unused-but-set-variable] pte_t pte; ^~~ arch/powerpc/kvm/e500_mmu.c: At top level: void kvmppc_mmu_destroy_e500(struct kvm_vcpu *vcpu) ^~~~~~~~~~~~~~~~~~~~~~~ cc1: all warnings being treated as errors -- arch/powerpc/kvm/mpic.c: In function 'kvmppc_mpic_connect_vcpu': if (cpu < 0 || cpu >= MAX_CPU) ^ cc1: all warnings being treated as errors vim +/DebugException +1658 arch/powerpc/kernel/traps.c 14cf11af6cf608 Paul Mackerras 2005-09-26 1657 03465f899bdac7 Nicholas Piggin 2016-09-16 @1658 void DebugException(struct pt_regs *regs, unsigned long debug_status) 14cf11af6cf608 Paul Mackerras 2005-09-26 1659 { 51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1660 current->thread.debug.dbsr = debug_status; 3bffb6529cf10d Dave Kleikamp 2010-02-08 1661 ec097c84dff175 Roland McGrath 2009-05-28 1662 /* Hack alert: On BookE, Branch Taken stops on the branch itself, while ec097c84dff175 Roland McGrath 2009-05-28 1663 * on server, it stops on the target of the branch. In order to simulate ec097c84dff175 Roland McGrath 2009-05-28 1664 * the server behaviour, we thus restart right away with a single step ec097c84dff175 Roland McGrath 2009-05-28 1665 * instead of stopping here when hitting a BT ec097c84dff175 Roland McGrath 2009-05-28 1666 */ ec097c84dff175 Roland McGrath 2009-05-28 1667 if (debug_status & DBSR_BT) { ec097c84dff175 Roland McGrath 2009-05-28 1668 regs->msr &= ~MSR_DE; ec097c84dff175 Roland McGrath 2009-05-28 1669 ec097c84dff175 Roland McGrath 2009-05-28 1670 /* Disable BT */ ec097c84dff175 Roland McGrath 2009-05-28 1671 mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~DBCR0_BT); ec097c84dff175 Roland McGrath 2009-05-28 1672 /* Clear the BT event */ ec097c84dff175 Roland McGrath 2009-05-28 1673 mtspr(SPRN_DBSR, DBSR_BT); ec097c84dff175 Roland McGrath 2009-05-28 1674 ec097c84dff175 Roland McGrath 2009-05-28 1675 /* Do the single step trick only when coming from userspace */ ec097c84dff175 Roland McGrath 2009-05-28 1676 if (user_mode(regs)) { 51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1677 current->thread.debug.dbcr0 &= ~DBCR0_BT; 51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1678 current->thread.debug.dbcr0 |= DBCR0_IDM | DBCR0_IC; ec097c84dff175 Roland McGrath 2009-05-28 1679 regs->msr |= MSR_DE; ec097c84dff175 Roland McGrath 2009-05-28 1680 return; ec097c84dff175 Roland McGrath 2009-05-28 1681 } ec097c84dff175 Roland McGrath 2009-05-28 1682 6cc89bad60a673 Naveen N. Rao 2016-11-21 1683 if (kprobe_post_handler(regs)) 6cc89bad60a673 Naveen N. Rao 2016-11-21 1684 return; 6cc89bad60a673 Naveen N. Rao 2016-11-21 1685 ec097c84dff175 Roland McGrath 2009-05-28 1686 if (notify_die(DIE_SSTEP, "block_step", regs, 5, ec097c84dff175 Roland McGrath 2009-05-28 1687 5, SIGTRAP) == NOTIFY_STOP) { ec097c84dff175 Roland McGrath 2009-05-28 1688 return; ec097c84dff175 Roland McGrath 2009-05-28 1689 } ec097c84dff175 Roland McGrath 2009-05-28 1690 if (debugger_sstep(regs)) ec097c84dff175 Roland McGrath 2009-05-28 1691 return; ec097c84dff175 Roland McGrath 2009-05-28 1692 } else if (debug_status & DBSR_IC) { /* Instruction complete */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1693 regs->msr &= ~MSR_DE; f82796214a95b1 Kumar Gala 2008-06-26 1694 14cf11af6cf608 Paul Mackerras 2005-09-26 1695 /* Disable instruction completion */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1696 mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~DBCR0_IC); 14cf11af6cf608 Paul Mackerras 2005-09-26 1697 /* Clear the instruction completion event */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1698 mtspr(SPRN_DBSR, DBSR_IC); f82796214a95b1 Kumar Gala 2008-06-26 1699 6cc89bad60a673 Naveen N. Rao 2016-11-21 1700 if (kprobe_post_handler(regs)) 6cc89bad60a673 Naveen N. Rao 2016-11-21 1701 return; 6cc89bad60a673 Naveen N. Rao 2016-11-21 1702 f82796214a95b1 Kumar Gala 2008-06-26 1703 if (notify_die(DIE_SSTEP, "single_step", regs, 5, f82796214a95b1 Kumar Gala 2008-06-26 1704 5, SIGTRAP) == NOTIFY_STOP) { f82796214a95b1 Kumar Gala 2008-06-26 1705 return; f82796214a95b1 Kumar Gala 2008-06-26 1706 } f82796214a95b1 Kumar Gala 2008-06-26 1707 14cf11af6cf608 Paul Mackerras 2005-09-26 1708 if (debugger_sstep(regs)) 14cf11af6cf608 Paul Mackerras 2005-09-26 1709 return; f82796214a95b1 Kumar Gala 2008-06-26 1710 d6a61bfc06d6f2 Luis Machado 2008-07-24 1711 if (user_mode(regs)) { 51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1712 current->thread.debug.dbcr0 &= ~DBCR0_IC; 51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1713 if (DBCR_ACTIVE_EVENTS(current->thread.debug.dbcr0, 51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1714 current->thread.debug.dbcr1)) 3bffb6529cf10d Dave Kleikamp 2010-02-08 1715 regs->msr |= MSR_DE; 3bffb6529cf10d Dave Kleikamp 2010-02-08 1716 else 3bffb6529cf10d Dave Kleikamp 2010-02-08 1717 /* Make sure the IDM bit is off */ 51ae8d4a2b9e4a Bharat Bhushan 2013-07-04 1718 current->thread.debug.dbcr0 &= ~DBCR0_IDM; 14cf11af6cf608 Paul Mackerras 2005-09-26 1719 } 3bffb6529cf10d Dave Kleikamp 2010-02-08 1720 3bffb6529cf10d Dave Kleikamp 2010-02-08 1721 _exception(SIGTRAP, regs, TRAP_TRACE, regs->nip); 3bffb6529cf10d Dave Kleikamp 2010-02-08 1722 } else 3bffb6529cf10d Dave Kleikamp 2010-02-08 1723 handle_debug(regs, debug_status); 14cf11af6cf608 Paul Mackerras 2005-09-26 1724 } 03465f899bdac7 Nicholas Piggin 2016-09-16 1725 NOKPROBE_SYMBOL(DebugException); 172ae2e7f8ff90 Dave Kleikamp 2010-02-08 1726 #endif /* CONFIG_PPC_ADV_DEBUG_REGS */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1727 14cf11af6cf608 Paul Mackerras 2005-09-26 1728 #if !defined(CONFIG_TAU_INT) 14cf11af6cf608 Paul Mackerras 2005-09-26 1729 void TAUException(struct pt_regs *regs) 14cf11af6cf608 Paul Mackerras 2005-09-26 1730 { 14cf11af6cf608 Paul Mackerras 2005-09-26 1731 printk("TAU trap at PC: %lx, MSR: %lx, vector=%lx %s\n", 14cf11af6cf608 Paul Mackerras 2005-09-26 1732 regs->nip, regs->msr, regs->trap, print_tainted()); 14cf11af6cf608 Paul Mackerras 2005-09-26 1733 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1734 #endif /* CONFIG_INT_TAU */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1735 14cf11af6cf608 Paul Mackerras 2005-09-26 1736 #ifdef CONFIG_ALTIVEC dc1c1ca3dcd94c Stephen Rothwell 2005-10-01 1737 void altivec_assist_exception(struct pt_regs *regs) 14cf11af6cf608 Paul Mackerras 2005-09-26 1738 { 14cf11af6cf608 Paul Mackerras 2005-09-26 1739 int err; 14cf11af6cf608 Paul Mackerras 2005-09-26 1740 14cf11af6cf608 Paul Mackerras 2005-09-26 1741 if (!user_mode(regs)) { 14cf11af6cf608 Paul Mackerras 2005-09-26 1742 printk(KERN_EMERG "VMX/Altivec assist exception in kernel mode" 14cf11af6cf608 Paul Mackerras 2005-09-26 1743 " at %lx\n", regs->nip); 8dad3f9257414f Paul Mackerras 2005-10-06 1744 die("Kernel VMX/Altivec assist exception", regs, SIGILL); 14cf11af6cf608 Paul Mackerras 2005-09-26 1745 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1746 dc1c1ca3dcd94c Stephen Rothwell 2005-10-01 1747 flush_altivec_to_thread(current); dc1c1ca3dcd94c Stephen Rothwell 2005-10-01 1748 eecff81d1fcda2 Anton Blanchard 2009-10-27 1749 PPC_WARN_EMULATED(altivec, regs); 14cf11af6cf608 Paul Mackerras 2005-09-26 1750 err = emulate_altivec(regs); 14cf11af6cf608 Paul Mackerras 2005-09-26 1751 if (err == 0) { 14cf11af6cf608 Paul Mackerras 2005-09-26 1752 regs->nip += 4; /* skip emulated instruction */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1753 emulate_single_step(regs); 14cf11af6cf608 Paul Mackerras 2005-09-26 1754 return; 14cf11af6cf608 Paul Mackerras 2005-09-26 1755 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1756 14cf11af6cf608 Paul Mackerras 2005-09-26 1757 if (err == -EFAULT) { 14cf11af6cf608 Paul Mackerras 2005-09-26 1758 /* got an error reading the instruction */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1759 _exception(SIGSEGV, regs, SEGV_ACCERR, regs->nip); 14cf11af6cf608 Paul Mackerras 2005-09-26 1760 } else { 14cf11af6cf608 Paul Mackerras 2005-09-26 1761 /* didn't recognize the instruction */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1762 /* XXX quick hack for now: set the non-Java bit in the VSCR */ 76462232c21dc0 Christian Dietrich 2011-06-04 1763 printk_ratelimited(KERN_ERR "Unrecognized altivec instruction " 14cf11af6cf608 Paul Mackerras 2005-09-26 1764 "in %s at %lx\n", current->comm, regs->nip); de79f7b9f6f92e Paul Mackerras 2013-09-10 1765 current->thread.vr_state.vscr.u[3] |= 0x10000; 14cf11af6cf608 Paul Mackerras 2005-09-26 1766 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1767 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1768 #endif /* CONFIG_ALTIVEC */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1769 14cf11af6cf608 Paul Mackerras 2005-09-26 1770 #ifdef CONFIG_FSL_BOOKE 14cf11af6cf608 Paul Mackerras 2005-09-26 @1771 void CacheLockingException(struct pt_regs *regs, unsigned long address, 14cf11af6cf608 Paul Mackerras 2005-09-26 1772 unsigned long error_code) 14cf11af6cf608 Paul Mackerras 2005-09-26 1773 { 14cf11af6cf608 Paul Mackerras 2005-09-26 1774 /* We treat cache locking instructions from the user 14cf11af6cf608 Paul Mackerras 2005-09-26 1775 * as priv ops, in the future we could try to do 14cf11af6cf608 Paul Mackerras 2005-09-26 1776 * something smarter 14cf11af6cf608 Paul Mackerras 2005-09-26 1777 */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1778 if (error_code & (ESR_DLK|ESR_ILK)) 14cf11af6cf608 Paul Mackerras 2005-09-26 1779 _exception(SIGILL, regs, ILL_PRVOPC, regs->nip); 14cf11af6cf608 Paul Mackerras 2005-09-26 1780 return; 14cf11af6cf608 Paul Mackerras 2005-09-26 1781 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1782 #endif /* CONFIG_FSL_BOOKE */ 14cf11af6cf608 Paul Mackerras 2005-09-26 1783 14cf11af6cf608 Paul Mackerras 2005-09-26 1784 #ifdef CONFIG_SPE 14cf11af6cf608 Paul Mackerras 2005-09-26 1785 void SPEFloatingPointException(struct pt_regs *regs) 14cf11af6cf608 Paul Mackerras 2005-09-26 1786 { 6a800f36acd5bf Liu Yu 2008-10-28 1787 extern int do_spe_mathemu(struct pt_regs *regs); 14cf11af6cf608 Paul Mackerras 2005-09-26 1788 unsigned long spefscr; 14cf11af6cf608 Paul Mackerras 2005-09-26 1789 int fpexc_mode; 14cf11af6cf608 Paul Mackerras 2005-09-26 1790 int code = 0; 6a800f36acd5bf Liu Yu 2008-10-28 1791 int err; 6a800f36acd5bf Liu Yu 2008-10-28 1792 685659ee70db0b yu liu 2011-06-14 1793 flush_spe_to_thread(current); 14cf11af6cf608 Paul Mackerras 2005-09-26 1794 14cf11af6cf608 Paul Mackerras 2005-09-26 1795 spefscr = current->thread.spefscr; 14cf11af6cf608 Paul Mackerras 2005-09-26 1796 fpexc_mode = current->thread.fpexc_mode; 14cf11af6cf608 Paul Mackerras 2005-09-26 1797 14cf11af6cf608 Paul Mackerras 2005-09-26 1798 if ((spefscr & SPEFSCR_FOVF) && (fpexc_mode & PR_FP_EXC_OVF)) { 14cf11af6cf608 Paul Mackerras 2005-09-26 1799 code = FPE_FLTOVF; 14cf11af6cf608 Paul Mackerras 2005-09-26 1800 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1801 else if ((spefscr & SPEFSCR_FUNF) && (fpexc_mode & PR_FP_EXC_UND)) { 14cf11af6cf608 Paul Mackerras 2005-09-26 1802 code = FPE_FLTUND; 14cf11af6cf608 Paul Mackerras 2005-09-26 1803 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1804 else if ((spefscr & SPEFSCR_FDBZ) && (fpexc_mode & PR_FP_EXC_DIV)) 14cf11af6cf608 Paul Mackerras 2005-09-26 1805 code = FPE_FLTDIV; 14cf11af6cf608 Paul Mackerras 2005-09-26 1806 else if ((spefscr & SPEFSCR_FINV) && (fpexc_mode & PR_FP_EXC_INV)) { 14cf11af6cf608 Paul Mackerras 2005-09-26 1807 code = FPE_FLTINV; 14cf11af6cf608 Paul Mackerras 2005-09-26 1808 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1809 else if ((spefscr & (SPEFSCR_FG | SPEFSCR_FX)) && (fpexc_mode & PR_FP_EXC_RES)) 14cf11af6cf608 Paul Mackerras 2005-09-26 1810 code = FPE_FLTRES; 14cf11af6cf608 Paul Mackerras 2005-09-26 1811 6a800f36acd5bf Liu Yu 2008-10-28 1812 err = do_spe_mathemu(regs); 6a800f36acd5bf Liu Yu 2008-10-28 1813 if (err == 0) { 6a800f36acd5bf Liu Yu 2008-10-28 1814 regs->nip += 4; /* skip emulated instruction */ 6a800f36acd5bf Liu Yu 2008-10-28 1815 emulate_single_step(regs); 6a800f36acd5bf Liu Yu 2008-10-28 1816 return; 6a800f36acd5bf Liu Yu 2008-10-28 1817 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1818 6a800f36acd5bf Liu Yu 2008-10-28 1819 if (err == -EFAULT) { 6a800f36acd5bf Liu Yu 2008-10-28 1820 /* got an error reading the instruction */ 6a800f36acd5bf Liu Yu 2008-10-28 1821 _exception(SIGSEGV, regs, SEGV_ACCERR, regs->nip); 6a800f36acd5bf Liu Yu 2008-10-28 1822 } else if (err == -EINVAL) { 6a800f36acd5bf Liu Yu 2008-10-28 1823 /* didn't recognize the instruction */ 6a800f36acd5bf Liu Yu 2008-10-28 1824 printk(KERN_ERR "unrecognized spe instruction " 6a800f36acd5bf Liu Yu 2008-10-28 1825 "in %s at %lx\n", current->comm, regs->nip); 6a800f36acd5bf Liu Yu 2008-10-28 1826 } else { 14cf11af6cf608 Paul Mackerras 2005-09-26 1827 _exception(SIGFPE, regs, code, regs->nip); 6a800f36acd5bf Liu Yu 2008-10-28 1828 } 6a800f36acd5bf Liu Yu 2008-10-28 1829 14cf11af6cf608 Paul Mackerras 2005-09-26 1830 return; 14cf11af6cf608 Paul Mackerras 2005-09-26 1831 } 6a800f36acd5bf Liu Yu 2008-10-28 1832 6a800f36acd5bf Liu Yu 2008-10-28 @1833 void SPEFloatingPointRoundException(struct pt_regs *regs) 6a800f36acd5bf Liu Yu 2008-10-28 1834 { 6a800f36acd5bf Liu Yu 2008-10-28 1835 extern int speround_handler(struct pt_regs *regs); 6a800f36acd5bf Liu Yu 2008-10-28 1836 int err; 6a800f36acd5bf Liu Yu 2008-10-28 1837 6a800f36acd5bf Liu Yu 2008-10-28 1838 preempt_disable(); 6a800f36acd5bf Liu Yu 2008-10-28 1839 if (regs->msr & MSR_SPE) 6a800f36acd5bf Liu Yu 2008-10-28 1840 giveup_spe(current); 6a800f36acd5bf Liu Yu 2008-10-28 1841 preempt_enable(); 6a800f36acd5bf Liu Yu 2008-10-28 1842 6a800f36acd5bf Liu Yu 2008-10-28 1843 regs->nip -= 4; 6a800f36acd5bf Liu Yu 2008-10-28 1844 err = speround_handler(regs); 6a800f36acd5bf Liu Yu 2008-10-28 1845 if (err == 0) { 6a800f36acd5bf Liu Yu 2008-10-28 1846 regs->nip += 4; /* skip emulated instruction */ 6a800f36acd5bf Liu Yu 2008-10-28 1847 emulate_single_step(regs); 6a800f36acd5bf Liu Yu 2008-10-28 1848 return; 6a800f36acd5bf Liu Yu 2008-10-28 1849 } 6a800f36acd5bf Liu Yu 2008-10-28 1850 6a800f36acd5bf Liu Yu 2008-10-28 1851 if (err == -EFAULT) { 6a800f36acd5bf Liu Yu 2008-10-28 1852 /* got an error reading the instruction */ 6a800f36acd5bf Liu Yu 2008-10-28 1853 _exception(SIGSEGV, regs, SEGV_ACCERR, regs->nip); 6a800f36acd5bf Liu Yu 2008-10-28 1854 } else if (err == -EINVAL) { 6a800f36acd5bf Liu Yu 2008-10-28 1855 /* didn't recognize the instruction */ 6a800f36acd5bf Liu Yu 2008-10-28 1856 printk(KERN_ERR "unrecognized spe instruction " 6a800f36acd5bf Liu Yu 2008-10-28 1857 "in %s at %lx\n", current->comm, regs->nip); 6a800f36acd5bf Liu Yu 2008-10-28 1858 } else { 6a800f36acd5bf Liu Yu 2008-10-28 1859 _exception(SIGFPE, regs, 0, regs->nip); 6a800f36acd5bf Liu Yu 2008-10-28 1860 return; 6a800f36acd5bf Liu Yu 2008-10-28 1861 } 6a800f36acd5bf Liu Yu 2008-10-28 1862 } 14cf11af6cf608 Paul Mackerras 2005-09-26 1863 #endif dc1c1ca3dcd94c Stephen Rothwell 2005-10-01 1864 :::::: The code at line 1658 was first introduced by commit :::::: 03465f899bdac70d34f6ca447a74d8ae9e284ce5 powerpc: Use kprobe blacklist for exception handlers :::::: TO: Nicholas Piggin <npiggin(a)gmail.com&gt; :::::: CC: Michael Ellerman <mpe(a)ellerman.id.au&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org