diff options
Diffstat (limited to 'arch/ia64/kernel')
| -rw-r--r-- | arch/ia64/kernel/cyclone.c | 2 | ||||
| -rw-r--r-- | arch/ia64/kernel/fsys.S | 7 | ||||
| -rw-r--r-- | arch/ia64/kernel/ivt.S | 1 | ||||
| -rw-r--r-- | arch/ia64/kernel/mca_drv.c | 16 | ||||
| -rw-r--r-- | arch/ia64/kernel/unaligned.c | 33 |
5 files changed, 44 insertions, 15 deletions
diff --git a/arch/ia64/kernel/cyclone.c b/arch/ia64/kernel/cyclone.c index 6ade3790ce07..e00b21514f7c 100644 --- a/arch/ia64/kernel/cyclone.c +++ b/arch/ia64/kernel/cyclone.c @@ -36,7 +36,7 @@ int __init init_cyclone_clock(void) u32* volatile cyclone_timer; /* Cyclone MPMC0 register */ if (!use_cyclone) - return -ENODEV; + return 0; printk(KERN_INFO "Summit chipset: Starting Cyclone Counter.\n"); diff --git a/arch/ia64/kernel/fsys.S b/arch/ia64/kernel/fsys.S index ac6055c83115..7a05b1cb2ad5 100644 --- a/arch/ia64/kernel/fsys.S +++ b/arch/ia64/kernel/fsys.S @@ -878,8 +878,7 @@ fsyscall_table: data8 0 // timer_delete data8 0 // clock_settime data8 fsys_clock_gettime // clock_gettime - #define __NR_syscall_last 1255 - .space 8*(NR_syscalls + 1024 - __NR_syscall_last), 0 - - .org fsyscall_table + 8*NR_syscalls // guard against failures to increase NR_syscalls + // fill in zeros for the remaining entries + .zero: + .space fsyscall_table + 8*NR_syscalls - .zero, 0 diff --git a/arch/ia64/kernel/ivt.S b/arch/ia64/kernel/ivt.S index 301f2e9d262e..9f80569a32b0 100644 --- a/arch/ia64/kernel/ivt.S +++ b/arch/ia64/kernel/ivt.S @@ -1362,7 +1362,6 @@ END(debug_vector) // 0x5a00 Entry 30 (size 16 bundles) Unaligned Reference (57) ENTRY(unaligned_access) DBG_FAULT(30) - mov r16=cr.ipsr mov r31=pr // prepare to save predicates ;; br.sptk.many dispatch_unaligned_handler diff --git a/arch/ia64/kernel/mca_drv.c b/arch/ia64/kernel/mca_drv.c index 8fd93afa75a7..e883d85906db 100644 --- a/arch/ia64/kernel/mca_drv.c +++ b/arch/ia64/kernel/mca_drv.c @@ -123,8 +123,9 @@ mca_page_isolate(unsigned long paddr) void mca_handler_bh(unsigned long paddr) { - printk(KERN_DEBUG "OS_MCA: process [pid: %d](%s) encounters MCA.\n", - current->pid, current->comm); + printk(KERN_ERR + "OS_MCA: process [pid: %d](%s) encounters MCA (paddr=%lx)\n", + current->pid, current->comm, paddr); spin_lock(&mca_bh_lock); switch (mca_page_isolate(paddr)) { @@ -132,7 +133,7 @@ mca_handler_bh(unsigned long paddr) printk(KERN_DEBUG "Page isolation: ( %lx ) success.\n", paddr); break; case ISOLATE_NG: - printk(KERN_DEBUG "Page isolation: ( %lx ) failure.\n", paddr); + printk(KERN_CRIT "Page isolation: ( %lx ) failure.\n", paddr); break; default: break; @@ -567,10 +568,15 @@ recover_from_processor_error(int platform, slidx_table_t *slidx, return 0; /* - * If there is no bus error, record is weird but we need not to recover. + * The cache check and bus check bits have four possible states + * cc bc + * 0 0 Weird record, not recovered + * 1 0 Cache error, not recovered + * 0 1 I/O error, attempt recovery + * 1 1 Memory error, attempt recovery */ if (psp->bc == 0 || pbci == NULL) - return 1; + return 0; /* * Sorry, we cannot handle so many. diff --git a/arch/ia64/kernel/unaligned.c b/arch/ia64/kernel/unaligned.c index f9e0ae936d1a..1e357550c776 100644 --- a/arch/ia64/kernel/unaligned.c +++ b/arch/ia64/kernel/unaligned.c @@ -24,7 +24,7 @@ #include <asm/uaccess.h> #include <asm/unaligned.h> -extern void die_if_kernel(char *str, struct pt_regs *regs, long err) __attribute__ ((noreturn)); +extern void die_if_kernel(char *str, struct pt_regs *regs, long err); #undef DEBUG_UNALIGNED_TRAP @@ -53,6 +53,15 @@ dump (const char *str, void *vp, size_t len) #define SIGN_EXT9 0xffffffffffffff00ul /* + * sysctl settable hook which tells the kernel whether to honor the + * IA64_THREAD_UAC_NOPRINT prctl. Because this is user settable, we want + * to allow the super user to enable/disable this for security reasons + * (i.e. don't allow attacker to fill up logs with unaligned accesses). + */ +int no_unaligned_warning; +static int noprint_warning; + +/* * For M-unit: * * opcode | m | x6 | @@ -1324,8 +1333,9 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs) if ((current->thread.flags & IA64_THREAD_UAC_SIGBUS) != 0) goto force_sigbus; - if (!(current->thread.flags & IA64_THREAD_UAC_NOPRINT) - && within_logging_rate_limit()) + if (!no_unaligned_warning && + !(current->thread.flags & IA64_THREAD_UAC_NOPRINT) && + within_logging_rate_limit()) { char buf[200]; /* comm[] is at most 16 bytes... */ size_t len; @@ -1340,7 +1350,22 @@ ia64_handle_unaligned (unsigned long ifa, struct pt_regs *regs) if (user_mode(regs)) tty_write_message(current->signal->tty, buf); buf[len-1] = '\0'; /* drop '\r' */ - printk(KERN_WARNING "%s", buf); /* watch for command names containing %s */ + /* watch for command names containing %s */ + printk(KERN_WARNING "%s", buf); + } else { + if (no_unaligned_warning && !noprint_warning) { + noprint_warning = 1; + printk(KERN_WARNING "%s(%d) encountered an " + "unaligned exception which required\n" + "kernel assistance, which degrades " + "the performance of the application.\n" + "Unaligned exception warnings have " + "been disabled by the system " + "administrator\n" + "echo 0 > /proc/sys/kernel/ignore-" + "unaligned-usertrap to re-enable\n", + current->comm, current->pid); + } } } else { if (within_logging_rate_limit()) |