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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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a4a5a7379e
On old ARM chips, unaligned accesses to memory are not trapped and fixed. On module load, symbols are relocated, and the relocation of __bug_table symbols is done on a u32 basis. Yet the section is not aligned to a multiple of 4 address, but to a multiple of 2. This triggers an Oops on pxa architecture, where address 0xbf0021ea is the first relocation in the __bug_table section : apply_relocate(): pxa3xx_nand: section 13 reloc 0 sym '' Unable to handle kernel paging request at virtual address bf0021ea pgd = e1cd0000 [bf0021ea] *pgd=c1cce851, *pte=c1cde04f, *ppte=c1cde01f Internal error: Oops: 23 [#1] ARM Modules linked in: CPU: 0 PID: 606 Comm: insmod Not tainted 4.2.0-rc8-next-20150828-cm-x300+ #887 Hardware name: CM-X300 module task: e1c68700 ti: e1c3e000 task.ti: e1c3e000 PC is at apply_relocate+0x2f4/0x3d4 LR is at 0xbf0021ea pc : [<c000e7c8>] lr : [<bf0021ea>] psr: 80000013 sp : e1c3fe30 ip : 60000013 fp : e49e8c60 r10: e49e8fa8 r9 : 00000000 r8 : e49e7c58 r7 : e49e8c38 r6 : e49e8a58 r5 : e49e8920 r4 : e49e8918 r3 : bf0021ea r2 : bf007034 r1 : 00000000 r0 : bf000000 Flags: Nzcv IRQs on FIQs on Mode SVC_32 ISA ARM Segment none Control: 0000397f Table: c1cd0018 DAC: 00000051 Process insmod (pid: 606, stack limit = 0xe1c3e198) [<c000e7c8>] (apply_relocate) from [<c005ce5c>] (load_module+0x1248/0x1f5c) [<c005ce5c>] (load_module) from [<c005dc54>] (SyS_init_module+0xe4/0x170) [<c005dc54>] (SyS_init_module) from [<c000a420>] (ret_fast_syscall+0x0/0x38) Fix this by ensuring entries in __bug_table are all aligned to at least of multiple of 4. This transforms a module section __bug_table as : - [12] __bug_table PROGBITS 00000000 002232 000018 00 A 0 0 1 + [12] __bug_table PROGBITS 00000000 002232 000018 00 A 0 0 4 Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr> Reviewed-by: Dave Martin <Dave.Martin@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> |
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| .. | ||
| hardware | ||
| mach | ||
| xen | ||
| arch_timer.h | ||
| arm-cci.h | ||
| asm-offsets.h | ||
| assembler.h | ||
| atomic.h | ||
| auxvec.h | ||
| barrier.h | ||
| bitops.h | ||
| bitrev.h | ||
| bL_switcher.h | ||
| bug.h | ||
| bugs.h | ||
| cache.h | ||
| cacheflush.h | ||
| cachetype.h | ||
| checksum.h | ||
| clkdev.h | ||
| cmpxchg.h | ||
| compiler.h | ||
| cp15.h | ||
| cpu.h | ||
| cpuidle.h | ||
| cputype.h | ||
| cti.h | ||
| dcc.h | ||
| delay.h | ||
| device.h | ||
| div64.h | ||
| dma-contiguous.h | ||
| dma-iommu.h | ||
| dma-mapping.h | ||
| dma.h | ||
| domain.h | ||
| ecard.h | ||
| edac.h | ||
| elf.h | ||
| entry-macro-multi.S | ||
| exception.h | ||
| fb.h | ||
| fiq.h | ||
| firmware.h | ||
| fixmap.h | ||
| flat.h | ||
| floppy.h | ||
| fncpy.h | ||
| fpstate.h | ||
| ftrace.h | ||
| futex.h | ||
| glue-cache.h | ||
| glue-df.h | ||
| glue-pf.h | ||
| glue-proc.h | ||
| glue.h | ||
| gpio.h | ||
| hardirq.h | ||
| highmem.h | ||
| hugetlb-3level.h | ||
| hugetlb.h | ||
| hw_breakpoint.h | ||
| hw_irq.h | ||
| hwcap.h | ||
| hypervisor.h | ||
| ide.h | ||
| idmap.h | ||
| insn.h | ||
| io.h | ||
| irq_work.h | ||
| irq.h | ||
| irqflags.h | ||
| jump_label.h | ||
| Kbuild | ||
| kexec.h | ||
| kgdb.h | ||
| kmap_types.h | ||
| kprobes.h | ||
| kvm_arm.h | ||
| kvm_asm.h | ||
| kvm_coproc.h | ||
| kvm_emulate.h | ||
| kvm_host.h | ||
| kvm_mmio.h | ||
| kvm_mmu.h | ||
| kvm_psci.h | ||
| limits.h | ||
| linkage.h | ||
| mach-types.h | ||
| mc146818rtc.h | ||
| mcpm.h | ||
| mcs_spinlock.h | ||
| memblock.h | ||
| memory.h | ||
| mm-arch-hooks.h | ||
| mmu_context.h | ||
| mmu.h | ||
| module.h | ||
| mpu.h | ||
| mtd-xip.h | ||
| mutex.h | ||
| neon.h | ||
| nwflash.h | ||
| opcodes-sec.h | ||
| opcodes-virt.h | ||
| opcodes.h | ||
| outercache.h | ||
| page-nommu.h | ||
| page.h | ||
| patch.h | ||
| pci.h | ||
| percpu.h | ||
| perf_event.h | ||
| pgalloc.h | ||
| pgtable-2level-hwdef.h | ||
| pgtable-2level-types.h | ||
| pgtable-2level.h | ||
| pgtable-3level-hwdef.h | ||
| pgtable-3level-types.h | ||
| pgtable-3level.h | ||
| pgtable-hwdef.h | ||
| pgtable-nommu.h | ||
| pgtable.h | ||
| pmu.h | ||
| probes.h | ||
| proc-fns.h | ||
| processor.h | ||
| procinfo.h | ||
| prom.h | ||
| psci.h | ||
| ptrace.h | ||
| setup.h | ||
| shmparam.h | ||
| signal.h | ||
| smp_plat.h | ||
| smp_scu.h | ||
| smp_twd.h | ||
| smp.h | ||
| sparsemem.h | ||
| spinlock_types.h | ||
| spinlock.h | ||
| stackprotector.h | ||
| stacktrace.h | ||
| string.h | ||
| suspend.h | ||
| swab.h | ||
| switch_to.h | ||
| sync_bitops.h | ||
| syscall.h | ||
| system_info.h | ||
| system_misc.h | ||
| tcm.h | ||
| therm.h | ||
| thread_info.h | ||
| thread_notify.h | ||
| timex.h | ||
| tlb.h | ||
| tlbflush.h | ||
| tls.h | ||
| topology.h | ||
| traps.h | ||
| trusted_foundations.h | ||
| types.h | ||
| uaccess.h | ||
| ucontext.h | ||
| unified.h | ||
| unistd.h | ||
| unwind.h | ||
| uprobes.h | ||
| user.h | ||
| v7m.h | ||
| vdso_datapage.h | ||
| vdso.h | ||
| vfp.h | ||
| vfpmacros.h | ||
| vga.h | ||
| virt.h | ||
| word-at-a-time.h | ||
| xor.h | ||