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author | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-31 10:51:10 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-05-31 10:51:10 -0700 |
commit | 8ee78c6fb982b3a7343faf561e7937d4cfa955ff (patch) | |
tree | 93d9327018e648174fb83b4144eed89de72693dd /arch/s390/kernel | |
parent | aac422afeffa9093544799c3257a96b55ba42044 (diff) | |
parent | 491af9903b858ee7c36735dc31708fe4074ce56f (diff) | |
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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux
Pull s390 patches from Heiko Carstens:
"A couple of s390 patches for the 3.5 merge window. Just a collection
of bug fixes and cleanups."
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
s390/uaccess: fix access_ok compile warnings
s390/cmpxchg: select HAVE_CMPXCHG_LOCAL option
s390/cmpxchg: fix sign extension bugs
s390/cmpxchg: fix 1 and 2 byte memory accesses
s390/cmpxchg: fix compile warnings specific to s390
s390/cmpxchg: add missing memory barrier to cmpxchg64
s390/cpu: remove cpu "capabilities" sysfs attribute
s390/kernel: Fix smp_call_ipl_cpu() for offline CPUs
s390/kernel: Introduce memcpy_absolute() function
s390/headers: replace __s390x__ with CONFIG_64BIT where possible
s390/headers: remove #ifdef __KERNEL__ from not exported headers
s390/irq: split irq stats for cpu-measurement alert facilities
s390/kexec: Move early_pgm_check_handler() to text section
s390/kdump: Use real mode for PSW restart and kexec
s390/kdump: Account /sys/kernel/kexec_crash_size changes in OS info
s390/kernel: Remove OS info init function call and diag 308 for kdump
Diffstat (limited to 'arch/s390/kernel')
-rw-r--r-- | arch/s390/kernel/base.S | 12 | ||||
-rw-r--r-- | arch/s390/kernel/early.c | 2 | ||||
-rw-r--r-- | arch/s390/kernel/head_kdump.S | 7 | ||||
-rw-r--r-- | arch/s390/kernel/ipl.c | 16 | ||||
-rw-r--r-- | arch/s390/kernel/irq.c | 3 | ||||
-rw-r--r-- | arch/s390/kernel/machine_kexec.c | 11 | ||||
-rw-r--r-- | arch/s390/kernel/os_info.c | 3 | ||||
-rw-r--r-- | arch/s390/kernel/perf_cpum_cf.c | 2 | ||||
-rw-r--r-- | arch/s390/kernel/setup.c | 12 | ||||
-rw-r--r-- | arch/s390/kernel/smp.c | 45 | ||||
-rw-r--r-- | arch/s390/kernel/sysinfo.c | 21 |
11 files changed, 53 insertions, 81 deletions
diff --git a/arch/s390/kernel/base.S b/arch/s390/kernel/base.S index 3aa4d00..c880ff7 100644 --- a/arch/s390/kernel/base.S +++ b/arch/s390/kernel/base.S @@ -88,6 +88,9 @@ ENTRY(diag308_reset) stctg %c0,%c15,0(%r4) larl %r4,.Lfpctl # Floating point control register stfpc 0(%r4) + larl %r4,.Lcontinue_psw # Save PSW flags + epsw %r2,%r3 + stm %r2,%r3,0(%r4) larl %r4,.Lrestart_psw # Setup restart PSW at absolute 0 lghi %r3,0 lg %r4,0(%r4) # Save PSW @@ -103,11 +106,20 @@ ENTRY(diag308_reset) lctlg %c0,%c15,0(%r4) larl %r4,.Lfpctl # Restore floating point ctl register lfpc 0(%r4) + larl %r4,.Lcontinue_psw # Restore PSW flags + lpswe 0(%r4) +.Lcontinue: br %r14 .align 16 .Lrestart_psw: .long 0x00080000,0x80000000 + .Lrestart_part2 + .section .data..nosave,"aw",@progbits +.align 8 +.Lcontinue_psw: + .quad 0,.Lcontinue + .previous + .section .bss .align 8 .Lctlregs: diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index d84181f..6684fff 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -237,7 +237,7 @@ static noinline __init void detect_machine_type(void) S390_lowcore.machine_flags |= MACHINE_FLAG_VM; } -static __init void early_pgm_check_handler(void) +static void early_pgm_check_handler(void) { unsigned long addr; const struct exception_table_entry *fixup; diff --git a/arch/s390/kernel/head_kdump.S b/arch/s390/kernel/head_kdump.S index e1ac389..796c976 100644 --- a/arch/s390/kernel/head_kdump.S +++ b/arch/s390/kernel/head_kdump.S @@ -85,11 +85,6 @@ startup_kdump_relocated: basr %r13,0 0: mvc 0(8,%r0),.Lrestart_psw-0b(%r13) # Setup restart PSW - mvc 464(16,%r0),.Lpgm_psw-0b(%r13) # Setup pgm check PSW - lhi %r1,1 # Start new kernel - diag %r1,%r1,0x308 # with diag 308 - -.Lno_diag308: # No diag 308 sam31 # Switch to 31 bit addr mode sr %r1,%r1 # Erase register r1 sr %r2,%r2 # Erase register r2 @@ -98,8 +93,6 @@ startup_kdump_relocated: .align 8 .Lrestart_psw: .long 0x00080000,0x80000000 + startup -.Lpgm_psw: - .quad 0x0000000180000000,0x0000000000000000 + .Lno_diag308 #else .align 2 .Lep_startup_kdump: diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index 8342e65..2f6cfd4 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -1528,12 +1528,15 @@ static struct shutdown_action __refdata dump_action = { static void dump_reipl_run(struct shutdown_trigger *trigger) { - u32 csum; - - csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0); - copy_to_absolute_zero(&S390_lowcore.ipib_checksum, &csum, sizeof(csum)); - copy_to_absolute_zero(&S390_lowcore.ipib, &reipl_block_actual, - sizeof(reipl_block_actual)); + struct { + void *addr; + __u32 csum; + } __packed ipib; + + ipib.csum = csum_partial(reipl_block_actual, + reipl_block_actual->hdr.len, 0); + ipib.addr = reipl_block_actual; + memcpy_absolute(&S390_lowcore.ipib, &ipib, sizeof(ipib)); dump_run(trigger); } @@ -1750,6 +1753,7 @@ static struct kobj_attribute on_restart_attr = static void __do_restart(void *ignore) { + __arch_local_irq_stosm(0x04); /* enable DAT */ smp_send_stop(); #ifdef CONFIG_CRASH_DUMP crash_kexec(NULL); diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c index 8a22c27..b4f4a71 100644 --- a/arch/s390/kernel/irq.c +++ b/arch/s390/kernel/irq.c @@ -42,7 +42,8 @@ static const struct irq_class intrclass_names[] = { {.name = "VRT", .desc = "[EXT] Virtio" }, {.name = "SCP", .desc = "[EXT] Service Call" }, {.name = "IUC", .desc = "[EXT] IUCV" }, - {.name = "CPM", .desc = "[EXT] CPU Measurement" }, + {.name = "CMS", .desc = "[EXT] CPU-Measurement: Sampling" }, + {.name = "CMC", .desc = "[EXT] CPU-Measurement: Counter" }, {.name = "CIO", .desc = "[I/O] Common I/O Layer Interrupt" }, {.name = "QAI", .desc = "[I/O] QDIO Adapter Interrupt" }, {.name = "DAS", .desc = "[I/O] DASD" }, diff --git a/arch/s390/kernel/machine_kexec.c b/arch/s390/kernel/machine_kexec.c index bdad47d..cdacf8f 100644 --- a/arch/s390/kernel/machine_kexec.c +++ b/arch/s390/kernel/machine_kexec.c @@ -24,6 +24,7 @@ #include <asm/ipl.h> #include <asm/diag.h> #include <asm/asm-offsets.h> +#include <asm/os_info.h> typedef void (*relocate_kernel_t)(kimage_entry_t *, unsigned long); @@ -79,8 +80,8 @@ static void __do_machine_kdump(void *image) #ifdef CONFIG_CRASH_DUMP int (*start_kdump)(int) = (void *)((struct kimage *) image)->start; - __load_psw_mask(PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA); setup_regs(); + __load_psw_mask(PSW_MASK_BASE | PSW_DEFAULT_KEY | PSW_MASK_EA | PSW_MASK_BA); start_kdump(1); #endif } @@ -114,8 +115,13 @@ static void crash_map_pages(int enable) size % KEXEC_CRASH_MEM_ALIGN); if (enable) vmem_add_mapping(crashk_res.start, size); - else + else { vmem_remove_mapping(crashk_res.start, size); + if (size) + os_info_crashkernel_add(crashk_res.start, size); + else + os_info_crashkernel_add(0, 0); + } } /* @@ -208,6 +214,7 @@ static void __machine_kexec(void *data) { struct kimage *image = data; + __arch_local_irq_stosm(0x04); /* enable DAT */ pfault_fini(); tracing_off(); debug_locks_off(); diff --git a/arch/s390/kernel/os_info.c b/arch/s390/kernel/os_info.c index e8d6c21..95fa5ac 100644 --- a/arch/s390/kernel/os_info.c +++ b/arch/s390/kernel/os_info.c @@ -60,7 +60,7 @@ void __init os_info_init(void) os_info.version_minor = OS_INFO_VERSION_MINOR; os_info.magic = OS_INFO_MAGIC; os_info.csum = os_info_csum(&os_info); - copy_to_absolute_zero(&S390_lowcore.os_info, &ptr, sizeof(ptr)); + memcpy_absolute(&S390_lowcore.os_info, &ptr, sizeof(ptr)); } #ifdef CONFIG_CRASH_DUMP @@ -138,7 +138,6 @@ static void os_info_old_init(void) goto fail_free; os_info_old_alloc(OS_INFO_VMCOREINFO, 1); os_info_old_alloc(OS_INFO_REIPL_BLOCK, 1); - os_info_old_alloc(OS_INFO_INIT_FN, PAGE_SIZE); pr_info("crashkernel: addr=0x%lx size=%lu\n", (unsigned long) os_info_old->crashkernel_addr, (unsigned long) os_info_old->crashkernel_size); diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c index cb019f4..9871b19 100644 --- a/arch/s390/kernel/perf_cpum_cf.c +++ b/arch/s390/kernel/perf_cpum_cf.c @@ -225,7 +225,7 @@ static void cpumf_measurement_alert(struct ext_code ext_code, if (!(alert & CPU_MF_INT_CF_MASK)) return; - kstat_cpu(smp_processor_id()).irqs[EXTINT_CPM]++; + kstat_cpu(smp_processor_id()).irqs[EXTINT_CMC]++; cpuhw = &__get_cpu_var(cpu_hw_events); /* Measurement alerts are shared and might happen when the PMU diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 06264ae..489d1d8 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -428,10 +428,12 @@ static void __init setup_lowcore(void) lc->restart_fn = (unsigned long) do_restart; lc->restart_data = 0; lc->restart_source = -1UL; - memcpy(&S390_lowcore.restart_stack, &lc->restart_stack, - 4*sizeof(unsigned long)); - copy_to_absolute_zero(&S390_lowcore.restart_psw, - &lc->restart_psw, sizeof(psw_t)); + + /* Setup absolute zero lowcore */ + memcpy_absolute(&S390_lowcore.restart_stack, &lc->restart_stack, + 4 * sizeof(unsigned long)); + memcpy_absolute(&S390_lowcore.restart_psw, &lc->restart_psw, + sizeof(lc->restart_psw)); set_prefix((u32)(unsigned long) lc); lowcore_ptr[0] = lc; @@ -598,7 +600,7 @@ static void __init setup_vmcoreinfo(void) #ifdef CONFIG_KEXEC unsigned long ptr = paddr_vmcoreinfo_note(); - copy_to_absolute_zero(&S390_lowcore.vmcore_info, &ptr, sizeof(ptr)); + memcpy_absolute(&S390_lowcore.vmcore_info, &ptr, sizeof(ptr)); #endif } diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 647ba94..15cca26 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -297,26 +297,27 @@ static void pcpu_start_fn(struct pcpu *pcpu, void (*func)(void *), void *data) static void pcpu_delegate(struct pcpu *pcpu, void (*func)(void *), void *data, unsigned long stack) { - struct _lowcore *lc = pcpu->lowcore; - unsigned short this_cpu; + struct _lowcore *lc = lowcore_ptr[pcpu - pcpu_devices]; + struct { + unsigned long stack; + void *func; + void *data; + unsigned long source; + } restart = { stack, func, data, stap() }; __load_psw_mask(psw_kernel_bits); - this_cpu = stap(); - if (pcpu->address == this_cpu) + if (pcpu->address == restart.source) func(data); /* should not return */ /* Stop target cpu (if func returns this stops the current cpu). */ pcpu_sigp_retry(pcpu, sigp_stop, 0); /* Restart func on the target cpu and stop the current cpu. */ - lc->restart_stack = stack; - lc->restart_fn = (unsigned long) func; - lc->restart_data = (unsigned long) data; - lc->restart_source = (unsigned long) this_cpu; + memcpy_absolute(&lc->restart_stack, &restart, sizeof(restart)); asm volatile( "0: sigp 0,%0,6 # sigp restart to target cpu\n" " brc 2,0b # busy, try again\n" "1: sigp 0,%1,5 # sigp stop to current cpu\n" " brc 2,1b # busy, try again\n" - : : "d" (pcpu->address), "d" (this_cpu) : "0", "1", "cc"); + : : "d" (pcpu->address), "d" (restart.source) : "0", "1", "cc"); for (;;) ; } @@ -800,17 +801,6 @@ void __noreturn cpu_die(void) #endif /* CONFIG_HOTPLUG_CPU */ -static void smp_call_os_info_init_fn(void) -{ - int (*init_fn)(void); - unsigned long size; - - init_fn = os_info_old_entry(OS_INFO_INIT_FN, &size); - if (!init_fn) - return; - init_fn(); -} - void __init smp_prepare_cpus(unsigned int max_cpus) { /* request the 0x1201 emergency signal external interrupt */ @@ -819,7 +809,6 @@ void __init smp_prepare_cpus(unsigned int max_cpus) /* request the 0x1202 external call external interrupt */ if (register_external_interrupt(0x1202, do_ext_call_interrupt) != 0) panic("Couldn't request external interrupt 0x1202"); - smp_call_os_info_init_fn(); smp_detect_cpus(); } @@ -943,19 +932,6 @@ static struct attribute_group cpu_common_attr_group = { .attrs = cpu_common_attrs, }; -static ssize_t show_capability(struct device *dev, - struct device_attribute *attr, char *buf) -{ - unsigned int capability; - int rc; - - rc = get_cpu_capability(&capability); - if (rc) - return rc; - return sprintf(buf, "%u\n", capability); -} -static DEVICE_ATTR(capability, 0444, show_capability, NULL); - static ssize_t show_idle_count(struct device *dev, struct device_attribute *attr, char *buf) { @@ -993,7 +969,6 @@ static ssize_t show_idle_time(struct device *dev, static DEVICE_ATTR(idle_time_us, 0444, show_idle_time, NULL); static struct attribute *cpu_online_attrs[] = { - &dev_attr_capability.attr, &dev_attr_idle_count.attr, &dev_attr_idle_time_us.attr, NULL, diff --git a/arch/s390/kernel/sysinfo.c b/arch/s390/kernel/sysinfo.c index 2a94b77..fa0eb23 100644 --- a/arch/s390/kernel/sysinfo.c +++ b/arch/s390/kernel/sysinfo.c @@ -393,27 +393,6 @@ static __init int create_proc_service_level(void) subsys_initcall(create_proc_service_level); /* - * Bogomips calculation based on cpu capability. - */ -int get_cpu_capability(unsigned int *capability) -{ - struct sysinfo_1_2_2 *info; - int rc; - - info = (void *) get_zeroed_page(GFP_KERNEL); - if (!info) - return -ENOMEM; - rc = stsi(info, 1, 2, 2); - if (rc == -ENOSYS) - goto out; - rc = 0; - *capability = info->capability; -out: - free_page((unsigned long) info); - return rc; -} - -/* * CPU capability might have changed. Therefore recalculate loops_per_jiffy. */ void s390_adjust_jiffies(void) |