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author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-03 21:33:18 -0800 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-11-03 21:33:18 -0800 |
commit | 66ef3493d4bb387f5a83915e33dc893102fd1b43 (patch) | |
tree | 2bd8a29781dce25d610c3bd058c0dd2a4139856f | |
parent | 639ab3eb38c6e92e27e061551dddee6dd3bbb5d2 (diff) | |
parent | d1f0f6c72c14af8a27a6549e0623f7cd61805e83 (diff) | |
download | linux-66ef3493d4bb387f5a83915e33dc893102fd1b43.tar.gz linux-66ef3493d4bb387f5a83915e33dc893102fd1b43.tar.bz2 linux-66ef3493d4bb387f5a83915e33dc893102fd1b43.zip |
Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 platform changes from Ingo Molnar:
"Misc updates to the Intel MID and SGI UV platforms"
* 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/intel-mid: Make intel_mid_ops static
arch/x86/intel-mid: Use kmemdup rather than duplicating its implementation
x86/platform/uv: Implement simple dump failover if kdump fails
x86/platform/uv: Insert per_cpu accessor function on uv_hub_nmi
-rw-r--r-- | arch/x86/include/asm/uv/uv_hub.h | 2 | ||||
-rw-r--r-- | arch/x86/platform/intel-mid/intel-mid.c | 2 | ||||
-rw-r--r-- | arch/x86/platform/intel-mid/sfi.c | 3 | ||||
-rw-r--r-- | arch/x86/platform/uv/uv_nmi.c | 53 |
4 files changed, 33 insertions, 27 deletions
diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h index a00ad8f2a657..ea7074784cc4 100644 --- a/arch/x86/include/asm/uv/uv_hub.h +++ b/arch/x86/include/asm/uv/uv_hub.h @@ -609,7 +609,7 @@ struct uv_cpu_nmi_s { DECLARE_PER_CPU(struct uv_cpu_nmi_s, uv_cpu_nmi); -#define uv_hub_nmi (uv_cpu_nmi.hub) +#define uv_hub_nmi this_cpu_read(uv_cpu_nmi.hub) #define uv_cpu_nmi_per(cpu) (per_cpu(uv_cpu_nmi, cpu)) #define uv_hub_nmi_per(cpu) (uv_cpu_nmi_per(cpu).hub) diff --git a/arch/x86/platform/intel-mid/intel-mid.c b/arch/x86/platform/intel-mid/intel-mid.c index 01d54ea766c1..1bbc21e2e4ae 100644 --- a/arch/x86/platform/intel-mid/intel-mid.c +++ b/arch/x86/platform/intel-mid/intel-mid.c @@ -61,7 +61,7 @@ enum intel_mid_timer_options intel_mid_timer_options; /* intel_mid_ops to store sub arch ops */ -struct intel_mid_ops *intel_mid_ops; +static struct intel_mid_ops *intel_mid_ops; /* getter function for sub arch ops*/ static void *(*get_intel_mid_ops[])(void) = INTEL_MID_OPS_INIT; enum intel_mid_cpu_type __intel_mid_cpu_chip; diff --git a/arch/x86/platform/intel-mid/sfi.c b/arch/x86/platform/intel-mid/sfi.c index ce992e8cc065..5ee360a951ce 100644 --- a/arch/x86/platform/intel-mid/sfi.c +++ b/arch/x86/platform/intel-mid/sfi.c @@ -197,10 +197,9 @@ static int __init sfi_parse_gpio(struct sfi_table_header *table) num = SFI_GET_NUM_ENTRIES(sb, struct sfi_gpio_table_entry); pentry = (struct sfi_gpio_table_entry *)sb->pentry; - gpio_table = kmalloc(num * sizeof(*pentry), GFP_KERNEL); + gpio_table = kmemdup(pentry, num * sizeof(*pentry), GFP_KERNEL); if (!gpio_table) return -1; - memcpy(gpio_table, pentry, num * sizeof(*pentry)); gpio_num_entry = num; pr_debug("GPIO pin info:\n"); diff --git a/arch/x86/platform/uv/uv_nmi.c b/arch/x86/platform/uv/uv_nmi.c index 5c9f63fa6abf..327f21c3bde1 100644 --- a/arch/x86/platform/uv/uv_nmi.c +++ b/arch/x86/platform/uv/uv_nmi.c @@ -376,38 +376,42 @@ static void uv_nmi_wait(int master) atomic_read(&uv_nmi_cpus_in_nmi), num_online_cpus()); } +/* Dump Instruction Pointer header */ static void uv_nmi_dump_cpu_ip_hdr(void) { - printk(KERN_DEFAULT - "\nUV: %4s %6s %-32s %s (Note: PID 0 not listed)\n", + pr_info("\nUV: %4s %6s %-32s %s (Note: PID 0 not listed)\n", "CPU", "PID", "COMMAND", "IP"); } +/* Dump Instruction Pointer info */ static void uv_nmi_dump_cpu_ip(int cpu, struct pt_regs *regs) { - printk(KERN_DEFAULT "UV: %4d %6d %-32.32s ", - cpu, current->pid, current->comm); - + pr_info("UV: %4d %6d %-32.32s ", cpu, current->pid, current->comm); printk_address(regs->ip); } -/* Dump this cpu's state */ +/* + * Dump this CPU's state. If action was set to "kdump" and the crash_kexec + * failed, then we provide "dump" as an alternate action. Action "dump" now + * also includes the show "ips" (instruction pointers) action whereas the + * action "ips" only displays instruction pointers for the non-idle CPU's. + * This is an abbreviated form of the "ps" command. + */ static void uv_nmi_dump_state_cpu(int cpu, struct pt_regs *regs) { const char *dots = " ................................. "; - if (uv_nmi_action_is("ips")) { - if (cpu == 0) - uv_nmi_dump_cpu_ip_hdr(); + if (cpu == 0) + uv_nmi_dump_cpu_ip_hdr(); - if (current->pid != 0) - uv_nmi_dump_cpu_ip(cpu, regs); + if (current->pid != 0 || !uv_nmi_action_is("ips")) + uv_nmi_dump_cpu_ip(cpu, regs); - } else if (uv_nmi_action_is("dump")) { - printk(KERN_DEFAULT - "UV:%sNMI process trace for CPU %d\n", dots, cpu); + if (uv_nmi_action_is("dump")) { + pr_info("UV:%sNMI process trace for CPU %d\n", dots, cpu); show_regs(regs); } + this_cpu_write(uv_cpu_nmi.state, UV_NMI_STATE_DUMP_DONE); } @@ -469,8 +473,7 @@ static void uv_nmi_dump_state(int cpu, struct pt_regs *regs, int master) uv_nmi_trigger_dump(tcpu); } if (ignored) - printk(KERN_DEFAULT "UV: %d CPUs ignored NMI\n", - ignored); + pr_alert("UV: %d CPUs ignored NMI\n", ignored); console_loglevel = saved_console_loglevel; pr_alert("UV: process trace complete\n"); @@ -492,8 +495,9 @@ static void uv_nmi_touch_watchdogs(void) touch_nmi_watchdog(); } -#if defined(CONFIG_KEXEC_CORE) static atomic_t uv_nmi_kexec_failed; + +#if defined(CONFIG_KEXEC_CORE) static void uv_nmi_kdump(int cpu, int master, struct pt_regs *regs) { /* Call crash to dump system state */ @@ -502,10 +506,9 @@ static void uv_nmi_kdump(int cpu, int master, struct pt_regs *regs) crash_kexec(regs); pr_emerg("UV: crash_kexec unexpectedly returned, "); + atomic_set(&uv_nmi_kexec_failed, 1); if (!kexec_crash_image) { pr_cont("crash kernel not loaded\n"); - atomic_set(&uv_nmi_kexec_failed, 1); - uv_nmi_sync_exit(1); return; } pr_cont("kexec busy, stalling cpus while waiting\n"); @@ -514,9 +517,6 @@ static void uv_nmi_kdump(int cpu, int master, struct pt_regs *regs) /* If crash exec fails the slaves should return, otherwise stall */ while (atomic_read(&uv_nmi_kexec_failed) == 0) mdelay(10); - - /* Crash kernel most likely not loaded, return in an orderly fashion */ - uv_nmi_sync_exit(0); } #else /* !CONFIG_KEXEC_CORE */ @@ -524,6 +524,7 @@ static inline void uv_nmi_kdump(int cpu, int master, struct pt_regs *regs) { if (master) pr_err("UV: NMI kdump: KEXEC not supported in this kernel\n"); + atomic_set(&uv_nmi_kexec_failed, 1); } #endif /* !CONFIG_KEXEC_CORE */ @@ -613,9 +614,14 @@ int uv_handle_nmi(unsigned int reason, struct pt_regs *regs) master = (atomic_read(&uv_nmi_cpu) == cpu); /* If NMI action is "kdump", then attempt to do it */ - if (uv_nmi_action_is("kdump")) + if (uv_nmi_action_is("kdump")) { uv_nmi_kdump(cpu, master, regs); + /* Unexpected return, revert action to "dump" */ + if (master) + strncpy(uv_nmi_action, "dump", strlen(uv_nmi_action)); + } + /* Pause as all cpus enter the NMI handler */ uv_nmi_wait(master); @@ -640,6 +646,7 @@ int uv_handle_nmi(unsigned int reason, struct pt_regs *regs) atomic_set(&uv_nmi_cpus_in_nmi, -1); atomic_set(&uv_nmi_cpu, -1); atomic_set(&uv_in_nmi, 0); + atomic_set(&uv_nmi_kexec_failed, 0); } uv_nmi_touch_watchdogs(); |