diff options
Diffstat (limited to 'linux-2.6-xen-sparse/drivers/xen/xenoprof/xenoprofile.c')
| -rw-r--r-- | linux-2.6-xen-sparse/drivers/xen/xenoprof/xenoprofile.c | 500 |
1 files changed, 0 insertions, 500 deletions
diff --git a/linux-2.6-xen-sparse/drivers/xen/xenoprof/xenoprofile.c b/linux-2.6-xen-sparse/drivers/xen/xenoprof/xenoprofile.c deleted file mode 100644 index 382a50f647..0000000000 --- a/linux-2.6-xen-sparse/drivers/xen/xenoprof/xenoprofile.c +++ /dev/null @@ -1,500 +0,0 @@ -/** - * @file xenoprofile.c - * - * @remark Copyright 2002 OProfile authors - * @remark Read the file COPYING - * - * @author John Levon <levon@movementarian.org> - * - * Modified by Aravind Menon and Jose Renato Santos for Xen - * These modifications are: - * Copyright (C) 2005 Hewlett-Packard Co. - * - * Separated out arch-generic part - * Copyright (c) 2006 Isaku Yamahata <yamahata at valinux co jp> - * VA Linux Systems Japan K.K. - */ - -#include <linux/init.h> -#include <linux/notifier.h> -#include <linux/smp.h> -#include <linux/oprofile.h> -#include <linux/sysdev.h> -#include <linux/slab.h> -#include <linux/interrupt.h> -#include <linux/vmalloc.h> -#include <asm/pgtable.h> -#include <xen/evtchn.h> -#include <xen/xenoprof.h> -#include <xen/driver_util.h> -#include <xen/interface/xen.h> -#include <xen/interface/xenoprof.h> -#include "../../../drivers/oprofile/cpu_buffer.h" -#include "../../../drivers/oprofile/event_buffer.h" - -#define MAX_XENOPROF_SAMPLES 16 - -/* sample buffers shared with Xen */ -xenoprof_buf_t * xenoprof_buf[MAX_VIRT_CPUS]; -/* Shared buffer area */ -struct xenoprof_shared_buffer shared_buffer; - -/* Passive sample buffers shared with Xen */ -xenoprof_buf_t *p_xenoprof_buf[MAX_OPROF_DOMAINS][MAX_VIRT_CPUS]; -/* Passive shared buffer area */ -struct xenoprof_shared_buffer p_shared_buffer[MAX_OPROF_DOMAINS]; - -static int xenoprof_start(void); -static void xenoprof_stop(void); - -static int xenoprof_enabled = 0; -static int xenoprof_is_primary = 0; -static int active_defined; - -/* Number of buffers in shared area (one per VCPU) */ -int nbuf; -/* Mappings of VIRQ_XENOPROF to irq number (per cpu) */ -int ovf_irq[NR_CPUS]; -/* cpu model type string - copied from Xen memory space on XENOPROF_init command */ -char cpu_type[XENOPROF_CPU_TYPE_SIZE]; - -#ifdef CONFIG_PM - -static int xenoprof_suspend(struct sys_device * dev, pm_message_t state) -{ - if (xenoprof_enabled == 1) - xenoprof_stop(); - return 0; -} - - -static int xenoprof_resume(struct sys_device * dev) -{ - if (xenoprof_enabled == 1) - xenoprof_start(); - return 0; -} - - -static struct sysdev_class oprofile_sysclass = { - set_kset_name("oprofile"), - .resume = xenoprof_resume, - .suspend = xenoprof_suspend -}; - - -static struct sys_device device_oprofile = { - .id = 0, - .cls = &oprofile_sysclass, -}; - - -static int __init init_driverfs(void) -{ - int error; - if (!(error = sysdev_class_register(&oprofile_sysclass))) - error = sysdev_register(&device_oprofile); - return error; -} - - -static void exit_driverfs(void) -{ - sysdev_unregister(&device_oprofile); - sysdev_class_unregister(&oprofile_sysclass); -} - -#else -#define init_driverfs() do { } while (0) -#define exit_driverfs() do { } while (0) -#endif /* CONFIG_PM */ - -unsigned long long oprofile_samples = 0; -unsigned long long p_oprofile_samples = 0; - -unsigned int pdomains; -struct xenoprof_passive passive_domains[MAX_OPROF_DOMAINS]; - -static void xenoprof_add_pc(xenoprof_buf_t *buf, int is_passive) -{ - int head, tail, size; - - head = buf->event_head; - tail = buf->event_tail; - size = buf->event_size; - - if (tail > head) { - while (tail < size) { - oprofile_add_pc(buf->event_log[tail].eip, - buf->event_log[tail].mode, - buf->event_log[tail].event); - if (!is_passive) - oprofile_samples++; - else - p_oprofile_samples++; - tail++; - } - tail = 0; - } - while (tail < head) { - oprofile_add_pc(buf->event_log[tail].eip, - buf->event_log[tail].mode, - buf->event_log[tail].event); - if (!is_passive) - oprofile_samples++; - else - p_oprofile_samples++; - tail++; - } - - buf->event_tail = tail; -} - -static void xenoprof_handle_passive(void) -{ - int i, j; - int flag_domain, flag_switch = 0; - - for (i = 0; i < pdomains; i++) { - flag_domain = 0; - for (j = 0; j < passive_domains[i].nbuf; j++) { - xenoprof_buf_t *buf = p_xenoprof_buf[i][j]; - if (buf->event_head == buf->event_tail) - continue; - if (!flag_domain) { - if (!oprofile_add_domain_switch(passive_domains[i]. - domain_id)) - goto done; - flag_domain = 1; - } - xenoprof_add_pc(buf, 1); - flag_switch = 1; - } - } -done: - if (flag_switch) - oprofile_add_domain_switch(COORDINATOR_DOMAIN); -} - -static irqreturn_t -xenoprof_ovf_interrupt(int irq, void * dev_id, struct pt_regs * regs) -{ - struct xenoprof_buf * buf; - int cpu; - static unsigned long flag; - - cpu = smp_processor_id(); - buf = xenoprof_buf[cpu]; - - xenoprof_add_pc(buf, 0); - - if (xenoprof_is_primary && !test_and_set_bit(0, &flag)) { - xenoprof_handle_passive(); - smp_mb__before_clear_bit(); - clear_bit(0, &flag); - } - - return IRQ_HANDLED; -} - - -static void unbind_virq(void) -{ - int i; - - for_each_online_cpu(i) { - if (ovf_irq[i] >= 0) { - unbind_from_irqhandler(ovf_irq[i], NULL); - ovf_irq[i] = -1; - } - } -} - - -static int bind_virq(void) -{ - int i, result; - - for_each_online_cpu(i) { - result = bind_virq_to_irqhandler(VIRQ_XENOPROF, - i, - xenoprof_ovf_interrupt, - SA_INTERRUPT, - "xenoprof", - NULL); - - if (result < 0) { - unbind_virq(); - return result; - } - - ovf_irq[i] = result; - } - - return 0; -} - - -static void unmap_passive_list(void) -{ - int i; - for (i = 0; i < pdomains; i++) - xenoprof_arch_unmap_shared_buffer(&p_shared_buffer[i]); - pdomains = 0; -} - - -static int map_xenoprof_buffer(int max_samples) -{ - struct xenoprof_get_buffer get_buffer; - struct xenoprof_buf *buf; - int ret, i; - - if ( shared_buffer.buffer ) - return 0; - - get_buffer.max_samples = max_samples; - ret = xenoprof_arch_map_shared_buffer(&get_buffer, &shared_buffer); - if (ret) - return ret; - nbuf = get_buffer.nbuf; - - for (i=0; i< nbuf; i++) { - buf = (struct xenoprof_buf*) - &shared_buffer.buffer[i * get_buffer.bufsize]; - BUG_ON(buf->vcpu_id >= MAX_VIRT_CPUS); - xenoprof_buf[buf->vcpu_id] = buf; - } - - return 0; -} - - -static int xenoprof_setup(void) -{ - int ret; - - if ( (ret = map_xenoprof_buffer(MAX_XENOPROF_SAMPLES)) ) - return ret; - - if ( (ret = bind_virq()) ) - return ret; - - if (xenoprof_is_primary) { - /* Define dom0 as an active domain if not done yet */ - if (!active_defined) { - domid_t domid; - ret = HYPERVISOR_xenoprof_op(XENOPROF_reset_active_list, NULL); - if (ret) - goto err; - domid = 0; - ret = HYPERVISOR_xenoprof_op(XENOPROF_set_active, &domid); - if (ret) - goto err; - active_defined = 1; - } - - ret = HYPERVISOR_xenoprof_op(XENOPROF_reserve_counters, NULL); - if (ret) - goto err; - xenoprof_arch_counter(); - ret = HYPERVISOR_xenoprof_op(XENOPROF_setup_events, NULL); - - if (ret) - goto err; - } - - ret = HYPERVISOR_xenoprof_op(XENOPROF_enable_virq, NULL); - if (ret) - goto err; - - xenoprof_enabled = 1; - return 0; - err: - unbind_virq(); - return ret; -} - - -static void xenoprof_shutdown(void) -{ - xenoprof_enabled = 0; - - HYPERVISOR_xenoprof_op(XENOPROF_disable_virq, NULL); - - if (xenoprof_is_primary) { - HYPERVISOR_xenoprof_op(XENOPROF_release_counters, NULL); - active_defined = 0; - } - - unbind_virq(); - - xenoprof_arch_unmap_shared_buffer(&shared_buffer); - if (xenoprof_is_primary) - unmap_passive_list(); -} - - -static int xenoprof_start(void) -{ - int ret = 0; - - if (xenoprof_is_primary) - ret = HYPERVISOR_xenoprof_op(XENOPROF_start, NULL); - if (!ret) - xenoprof_arch_start(); - return ret; -} - - -static void xenoprof_stop(void) -{ - if (xenoprof_is_primary) - HYPERVISOR_xenoprof_op(XENOPROF_stop, NULL); - xenoprof_arch_stop(); -} - - -static int xenoprof_set_active(int * active_domains, - unsigned int adomains) -{ - int ret = 0; - int i; - int set_dom0 = 0; - domid_t domid; - - if (!xenoprof_is_primary) - return 0; - - if (adomains > MAX_OPROF_DOMAINS) - return -E2BIG; - - ret = HYPERVISOR_xenoprof_op(XENOPROF_reset_active_list, NULL); - if (ret) - return ret; - - for (i=0; i<adomains; i++) { - domid = active_domains[i]; - if (domid != active_domains[i]) { - ret = -EINVAL; - goto out; - } - ret = HYPERVISOR_xenoprof_op(XENOPROF_set_active, &domid); - if (ret) - goto out; - if (active_domains[i] == 0) - set_dom0 = 1; - } - /* dom0 must always be active but may not be in the list */ - if (!set_dom0) { - domid = 0; - ret = HYPERVISOR_xenoprof_op(XENOPROF_set_active, &domid); - } - -out: - if (ret) - HYPERVISOR_xenoprof_op(XENOPROF_reset_active_list, NULL); - active_defined = !ret; - return ret; -} - -static int xenoprof_set_passive(int * p_domains, - unsigned int pdoms) -{ - int ret; - int i, j; - struct xenoprof_buf *buf; - - if (!xenoprof_is_primary) - return 0; - - if (pdoms > MAX_OPROF_DOMAINS) - return -E2BIG; - - ret = HYPERVISOR_xenoprof_op(XENOPROF_reset_passive_list, NULL); - if (ret) - return ret; - unmap_passive_list(); - - for (i = 0; i < pdoms; i++) { - passive_domains[i].domain_id = p_domains[i]; - passive_domains[i].max_samples = 2048; - ret = xenoprof_arch_set_passive(&passive_domains[i], - &p_shared_buffer[i]); - if (ret) - goto out; - for (j = 0; j < passive_domains[i].nbuf; j++) { - buf = (struct xenoprof_buf *) - &p_shared_buffer[i].buffer[j * passive_domains[i].bufsize]; - BUG_ON(buf->vcpu_id >= MAX_VIRT_CPUS); - p_xenoprof_buf[i][buf->vcpu_id] = buf; - } - } - - pdomains = pdoms; - return 0; - -out: - for (j = 0; j < i; j++) - xenoprof_arch_unmap_shared_buffer(&p_shared_buffer[i]); - - return ret; -} - -struct oprofile_operations xenoprof_ops = { -#ifdef HAVE_XENOPROF_CREATE_FILES - .create_files = xenoprof_create_files, -#endif - .set_active = xenoprof_set_active, - .set_passive = xenoprof_set_passive, - .setup = xenoprof_setup, - .shutdown = xenoprof_shutdown, - .start = xenoprof_start, - .stop = xenoprof_stop -}; - - -/* in order to get driverfs right */ -static int using_xenoprof; - -int __init xenoprofile_init(struct oprofile_operations * ops) -{ - struct xenoprof_init init; - int ret, i; - - ret = HYPERVISOR_xenoprof_op(XENOPROF_init, &init); - if (!ret) { - xenoprof_arch_init_counter(&init); - xenoprof_is_primary = init.is_primary; - - /* cpu_type is detected by Xen */ - cpu_type[XENOPROF_CPU_TYPE_SIZE-1] = 0; - strncpy(cpu_type, init.cpu_type, XENOPROF_CPU_TYPE_SIZE - 1); - xenoprof_ops.cpu_type = cpu_type; - - init_driverfs(); - using_xenoprof = 1; - *ops = xenoprof_ops; - - for (i=0; i<NR_CPUS; i++) - ovf_irq[i] = -1; - - active_defined = 0; - } - printk(KERN_INFO "%s: ret %d, events %d, xenoprof_is_primary %d\n", - __func__, ret, init.num_events, xenoprof_is_primary); - return ret; -} - - -void xenoprofile_exit(void) -{ - if (using_xenoprof) - exit_driverfs(); - - xenoprof_arch_unmap_shared_buffer(&shared_buffer); - if (xenoprof_is_primary) { - unmap_passive_list(); - HYPERVISOR_xenoprof_op(XENOPROF_shutdown, NULL); - } -} |