diff options
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/sh/Kconfig.cpu | 5 | ||||
| -rw-r--r-- | arch/sh/kernel/traps_64.c | 35 |
2 files changed, 5 insertions, 35 deletions
diff --git a/arch/sh/Kconfig.cpu b/arch/sh/Kconfig.cpu index c7d704381a6..9eb1712372d 100644 --- a/arch/sh/Kconfig.cpu +++ b/arch/sh/Kconfig.cpu @@ -76,11 +76,6 @@ config SPECULATIVE_EXECUTION If unsure, say N. -config SH64_USER_MISALIGNED_FIXUP - def_bool y - prompt "Fixup misaligned loads/stores occurring in user mode" - depends on SUPERH64 - config SH64_ID2815_WORKAROUND bool "Include workaround for SH5-101 cut2 silicon defect ID2815" depends on CPU_SUBTYPE_SH5_101 diff --git a/arch/sh/kernel/traps_64.c b/arch/sh/kernel/traps_64.c index a85831cbf18..267e5ebbb47 100644 --- a/arch/sh/kernel/traps_64.c +++ b/arch/sh/kernel/traps_64.c @@ -370,7 +370,6 @@ static int generate_and_check_address(struct pt_regs *regs, return -1; } -#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) /* Check accessible. For misaligned access in the kernel, assume the address is always accessible (and if not, just fault when the load/store gets done.) */ @@ -380,18 +379,13 @@ static int generate_and_check_address(struct pt_regs *regs, } /* Do access_ok check later - it depends on whether it's a load or a store. */ } -#endif *address = addr; return 0; } -/* Default value as for sh */ -#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) static int user_mode_unaligned_fixup_count = 10; static int user_mode_unaligned_fixup_enable = 1; -#endif - static int kernel_mode_unaligned_fixup_count = 32; static void misaligned_kernel_word_load(__u64 address, int do_sign_extend, __u64 *result) @@ -440,7 +434,6 @@ static int misaligned_load(struct pt_regs *regs, } destreg = (opcode >> 4) & 0x3f; -#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) if (user_mode(regs)) { __u64 buffer; @@ -470,9 +463,7 @@ static int misaligned_load(struct pt_regs *regs, width_shift, (unsigned long) regs->pc); break; } - } else -#endif - { + } else { /* kernel mode - we can take short cuts since if we fault, it's a genuine bug */ __u64 lo, hi; @@ -519,7 +510,6 @@ static int misaligned_store(struct pt_regs *regs, } srcreg = (opcode >> 4) & 0x3f; -#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) if (user_mode(regs)) { __u64 buffer; @@ -546,9 +536,7 @@ static int misaligned_store(struct pt_regs *regs, if (__copy_user((void *)(int)address, &buffer, (1 << width_shift)) > 0) { return -1; /* fault */ } - } else -#endif - { + } else { /* kernel mode - we can take short cuts since if we fault, it's a genuine bug */ __u64 val = regs->regs[srcreg]; @@ -576,7 +564,6 @@ static int misaligned_store(struct pt_regs *regs, } -#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) /* Never need to fix up misaligned FPU accesses within the kernel since that's a real error. */ static int misaligned_fpu_load(struct pt_regs *regs, @@ -727,7 +714,6 @@ static int misaligned_fpu_store(struct pt_regs *regs, return -1; } } -#endif static int misaligned_fixup(struct pt_regs *regs) { @@ -735,12 +721,8 @@ static int misaligned_fixup(struct pt_regs *regs) int error; int major, minor; -#if !defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) - /* Never fixup user mode misaligned accesses without this option enabled. */ - return -1; -#else - if (!user_mode_unaligned_fixup_enable) return -1; -#endif + if (!user_mode_unaligned_fixup_enable) + return -1; error = read_opcode(regs->pc, &opcode, user_mode(regs)); if (error < 0) { @@ -749,15 +731,12 @@ static int misaligned_fixup(struct pt_regs *regs) major = (opcode >> 26) & 0x3f; minor = (opcode >> 16) & 0xf; -#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) if (user_mode(regs) && (user_mode_unaligned_fixup_count > 0)) { --user_mode_unaligned_fixup_count; /* Only do 'count' worth of these reports, to remove a potential DoS against syslog */ printk("Fixing up unaligned userspace access in \"%s\" pid=%d pc=0x%08x ins=0x%08lx\n", current->comm, task_pid_nr(current), (__u32)regs->pc, opcode); - } else -#endif - if (!user_mode(regs) && (kernel_mode_unaligned_fixup_count > 0)) { + } else if (!user_mode(regs) && (kernel_mode_unaligned_fixup_count > 0)) { --kernel_mode_unaligned_fixup_count; if (in_interrupt()) { printk("Fixing up unaligned kernelspace access in interrupt pc=0x%08x ins=0x%08lx\n", @@ -830,7 +809,6 @@ static int misaligned_fixup(struct pt_regs *regs) } break; -#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) case (0x94>>2): /* FLD.S */ error = misaligned_fpu_load(regs, opcode, 1, 2, 0); break; @@ -881,7 +859,6 @@ static int misaligned_fixup(struct pt_regs *regs) break; } break; -#endif default: /* Fault */ @@ -907,7 +884,6 @@ static ctl_table unaligned_table[] = { .mode = 0644, .proc_handler = &proc_dointvec }, -#if defined(CONFIG_SH64_USER_MISALIGNED_FIXUP) { .ctl_name = CTL_UNNUMBERED, .procname = "user_reports", @@ -923,7 +899,6 @@ static ctl_table unaligned_table[] = { .maxlen = sizeof(int), .mode = 0644, .proc_handler = &proc_dointvec}, -#endif {} }; |