diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/x86/kernel/nmi_selftest.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/x86/kernel/nmi_selftest.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/ANDROID_3.4.5/arch/x86/kernel/nmi_selftest.c b/ANDROID_3.4.5/arch/x86/kernel/nmi_selftest.c deleted file mode 100644 index 2c39dcd5..00000000 --- a/ANDROID_3.4.5/arch/x86/kernel/nmi_selftest.c +++ /dev/null @@ -1,181 +0,0 @@ -/* - * arch/x86/kernel/nmi-selftest.c - * - * Testsuite for NMI: IPIs - * - * Started by Don Zickus: - * (using lib/locking-selftest.c as a guide) - * - * Copyright (C) 2011 Red Hat, Inc., Don Zickus <dzickus@redhat.com> - */ - -#include <linux/smp.h> -#include <linux/cpumask.h> -#include <linux/delay.h> -#include <linux/init.h> - -#include <asm/apic.h> -#include <asm/nmi.h> - -#define SUCCESS 0 -#define FAILURE 1 -#define TIMEOUT 2 - -static int __initdata nmi_fail; - -/* check to see if NMI IPIs work on this machine */ -static DECLARE_BITMAP(nmi_ipi_mask, NR_CPUS) __initdata; - -static int __initdata testcase_total; -static int __initdata testcase_successes; -static int __initdata expected_testcase_failures; -static int __initdata unexpected_testcase_failures; -static int __initdata unexpected_testcase_unknowns; - -static int __init nmi_unk_cb(unsigned int val, struct pt_regs *regs) -{ - unexpected_testcase_unknowns++; - return NMI_HANDLED; -} - -static void __init init_nmi_testsuite(void) -{ - /* trap all the unknown NMIs we may generate */ - register_nmi_handler(NMI_UNKNOWN, nmi_unk_cb, 0, "nmi_selftest_unk"); -} - -static void __init cleanup_nmi_testsuite(void) -{ - unregister_nmi_handler(NMI_UNKNOWN, "nmi_selftest_unk"); -} - -static int __init test_nmi_ipi_callback(unsigned int val, struct pt_regs *regs) -{ - int cpu = raw_smp_processor_id(); - - if (cpumask_test_and_clear_cpu(cpu, to_cpumask(nmi_ipi_mask))) - return NMI_HANDLED; - - return NMI_DONE; -} - -static void __init test_nmi_ipi(struct cpumask *mask) -{ - unsigned long timeout; - - if (register_nmi_handler(NMI_LOCAL, test_nmi_ipi_callback, - NMI_FLAG_FIRST, "nmi_selftest")) { - nmi_fail = FAILURE; - return; - } - - /* sync above data before sending NMI */ - wmb(); - - apic->send_IPI_mask(mask, NMI_VECTOR); - - /* Don't wait longer than a second */ - timeout = USEC_PER_SEC; - while (!cpumask_empty(mask) && timeout--) - udelay(1); - - /* What happens if we timeout, do we still unregister?? */ - unregister_nmi_handler(NMI_LOCAL, "nmi_selftest"); - - if (!timeout) - nmi_fail = TIMEOUT; - return; -} - -static void __init remote_ipi(void) -{ - cpumask_copy(to_cpumask(nmi_ipi_mask), cpu_online_mask); - cpumask_clear_cpu(smp_processor_id(), to_cpumask(nmi_ipi_mask)); - if (!cpumask_empty(to_cpumask(nmi_ipi_mask))) - test_nmi_ipi(to_cpumask(nmi_ipi_mask)); -} - -static void __init local_ipi(void) -{ - cpumask_clear(to_cpumask(nmi_ipi_mask)); - cpumask_set_cpu(smp_processor_id(), to_cpumask(nmi_ipi_mask)); - test_nmi_ipi(to_cpumask(nmi_ipi_mask)); -} - -static void __init reset_nmi(void) -{ - nmi_fail = 0; -} - -static void __init dotest(void (*testcase_fn)(void), int expected) -{ - testcase_fn(); - /* - * Filter out expected failures: - */ - if (nmi_fail != expected) { - unexpected_testcase_failures++; - - if (nmi_fail == FAILURE) - printk("FAILED |"); - else if (nmi_fail == TIMEOUT) - printk("TIMEOUT|"); - else - printk("ERROR |"); - dump_stack(); - } else { - testcase_successes++; - printk(" ok |"); - } - testcase_total++; - - reset_nmi(); -} - -static inline void __init print_testname(const char *testname) -{ - printk("%12s:", testname); -} - -void __init nmi_selftest(void) -{ - init_nmi_testsuite(); - - /* - * Run the testsuite: - */ - printk("----------------\n"); - printk("| NMI testsuite:\n"); - printk("--------------------\n"); - - print_testname("remote IPI"); - dotest(remote_ipi, SUCCESS); - printk("\n"); - print_testname("local IPI"); - dotest(local_ipi, SUCCESS); - printk("\n"); - - cleanup_nmi_testsuite(); - - if (unexpected_testcase_failures) { - printk("--------------------\n"); - printk("BUG: %3d unexpected failures (out of %3d) - debugging disabled! |\n", - unexpected_testcase_failures, testcase_total); - printk("-----------------------------------------------------------------\n"); - } else if (expected_testcase_failures && testcase_successes) { - printk("--------------------\n"); - printk("%3d out of %3d testcases failed, as expected. |\n", - expected_testcase_failures, testcase_total); - printk("----------------------------------------------------\n"); - } else if (expected_testcase_failures && !testcase_successes) { - printk("--------------------\n"); - printk("All %3d testcases failed, as expected. |\n", - expected_testcase_failures); - printk("----------------------------------------\n"); - } else { - printk("--------------------\n"); - printk("Good, all %3d testcases passed! |\n", - testcase_successes); - printk("---------------------------------\n"); - } -} |