diff options
| -rw-r--r-- | arch/x86/Kconfig.debug | 2 | ||||
| -rw-r--r-- | arch/x86/kernel/mmiotrace/mmio-mod.c | 140 | ||||
| -rw-r--r-- | include/linux/mmiotrace.h | 85 | ||||
| -rw-r--r-- | kernel/trace/trace.c | 34 | ||||
| -rw-r--r-- | kernel/trace/trace.h | 14 | ||||
| -rw-r--r-- | kernel/trace/trace_mmiotrace.c | 151 |
6 files changed, 238 insertions, 188 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 7e4b8494078..1d6de0d67f9 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -173,7 +173,7 @@ config MMIOTRACE_HOOKS config MMIOTRACE bool "Memory mapped IO tracing" - depends on DEBUG_KERNEL && RELAY + depends on DEBUG_KERNEL select TRACING select MMIOTRACE_HOOKS default y diff --git a/arch/x86/kernel/mmiotrace/mmio-mod.c b/arch/x86/kernel/mmiotrace/mmio-mod.c index c7a67d7e482..62abc281a51 100644 --- a/arch/x86/kernel/mmiotrace/mmio-mod.c +++ b/arch/x86/kernel/mmiotrace/mmio-mod.c @@ -37,11 +37,6 @@ #define NAME "mmiotrace: " -/* This app's relay channel files will appear in /debug/mmio-trace */ -static const char APP_DIR[] = "mmio-trace"; -/* the marker injection file in /debug/APP_DIR */ -static const char MARKER_FILE[] = "mmio-marker"; - struct trap_reason { unsigned long addr; unsigned long ip; @@ -56,18 +51,15 @@ struct remap_trace { unsigned long id; }; -static const size_t subbuf_size = 256*1024; - /* Accessed per-cpu. */ static DEFINE_PER_CPU(struct trap_reason, pf_reason); -static DEFINE_PER_CPU(struct mm_io_header_rw, cpu_trace); +static DEFINE_PER_CPU(struct mmiotrace_rw, cpu_trace); #if 0 /* XXX: no way gather this info anymore */ /* Access to this is not per-cpu. */ static DEFINE_PER_CPU(atomic_t, dropped); #endif -static struct dentry *dir; static struct dentry *marker_file; static DEFINE_MUTEX(mmiotrace_mutex); @@ -82,24 +74,21 @@ static LIST_HEAD(trace_list); /* struct remap_trace */ * and trace_lock. * - Routines depending on is_enabled() must take trace_lock. * - trace_list users must hold trace_lock. - * - is_enabled() guarantees that chan is valid. + * - is_enabled() guarantees that mmio_trace_record is allowed. * - pre/post callbacks assume the effect of is_enabled() being true. */ /* module parameters */ -static unsigned int n_subbufs = 32*4; static unsigned long filter_offset; static int nommiotrace; static int ISA_trace; static int trace_pc; -module_param(n_subbufs, uint, 0); module_param(filter_offset, ulong, 0); module_param(nommiotrace, bool, 0); module_param(ISA_trace, bool, 0); module_param(trace_pc, bool, 0); -MODULE_PARM_DESC(n_subbufs, "Number of 256kB buffers, default 128."); MODULE_PARM_DESC(filter_offset, "Start address of traced mappings."); MODULE_PARM_DESC(nommiotrace, "Disable actual MMIO tracing."); MODULE_PARM_DESC(ISA_trace, "Do not exclude the low ISA range."); @@ -110,6 +99,7 @@ static bool is_enabled(void) return atomic_read(&mmiotrace_enabled); } +#if 0 /* XXX: needs rewrite */ /* * Write callback for the debugfs entry: * Read a marker and write it to the mmio trace log @@ -145,6 +135,7 @@ static ssize_t write_marker(struct file *file, const char __user *buffer, kfree(event); return len; } +#endif static void print_pte(unsigned long address) { @@ -198,9 +189,10 @@ static void pre(struct kmmio_probe *p, struct pt_regs *regs, unsigned long addr) { struct trap_reason *my_reason = &get_cpu_var(pf_reason); - struct mm_io_header_rw *my_trace = &get_cpu_var(cpu_trace); + struct mmiotrace_rw *my_trace = &get_cpu_var(cpu_trace); const unsigned long instptr = instruction_pointer(regs); const enum reason_type type = get_ins_type(instptr); + struct remap_trace *trace = p->user_data; /* it doesn't make sense to have more than one active trace per cpu */ if (my_reason->active_traces) @@ -212,23 +204,17 @@ static void pre(struct kmmio_probe *p, struct pt_regs *regs, my_reason->addr = addr; my_reason->ip = instptr; - my_trace->header.type = MMIO_MAGIC; - my_trace->header.pid = 0; - my_trace->header.data_len = sizeof(struct mm_io_rw); - my_trace->rw.address = addr; - /* - * struct remap_trace *trace = p->user_data; - * phys = addr - trace->probe.addr + trace->phys; - */ + my_trace->phys = addr - trace->probe.addr + trace->phys; + my_trace->map_id = trace->id; /* * Only record the program counter when requested. * It may taint clean-room reverse engineering. */ if (trace_pc) - my_trace->rw.pc = instptr; + my_trace->pc = instptr; else - my_trace->rw.pc = 0; + my_trace->pc = 0; /* * XXX: the timestamp recorded will be *after* the tracing has been @@ -238,28 +224,25 @@ static void pre(struct kmmio_probe *p, struct pt_regs *regs, switch (type) { case REG_READ: - my_trace->header.type |= - (MMIO_READ << MMIO_OPCODE_SHIFT) | - (get_ins_mem_width(instptr) << MMIO_WIDTH_SHIFT); + my_trace->opcode = MMIO_READ; + my_trace->width = get_ins_mem_width(instptr); break; case REG_WRITE: - my_trace->header.type |= - (MMIO_WRITE << MMIO_OPCODE_SHIFT) | - (get_ins_mem_width(instptr) << MMIO_WIDTH_SHIFT); - my_trace->rw.value = get_ins_reg_val(instptr, regs); + my_trace->opcode = MMIO_WRITE; + my_trace->width = get_ins_mem_width(instptr); + my_trace->value = get_ins_reg_val(instptr, regs); break; case IMM_WRITE: - my_trace->header.type |= - (MMIO_WRITE << MMIO_OPCODE_SHIFT) | - (get_ins_mem_width(instptr) << MMIO_WIDTH_SHIFT); - my_trace->rw.value = get_ins_imm_val(instptr); + my_trace->opcode = MMIO_WRITE; + my_trace->width = get_ins_mem_width(instptr); + my_trace->value = get_ins_imm_val(instptr); break; default: { unsigned char *ip = (unsigned char *)instptr; - my_trace->header.type |= - (MMIO_UNKNOWN_OP << MMIO_OPCODE_SHIFT); - my_trace->rw.value = (*ip) << 16 | *(ip + 1) << 8 | + my_trace->opcode = MMIO_UNKNOWN_OP; + my_trace->width = 0; + my_trace->value = (*ip) << 16 | *(ip + 1) << 8 | *(ip + 2); } } @@ -271,7 +254,7 @@ static void post(struct kmmio_probe *p, unsigned long condition, struct pt_regs *regs) { struct trap_reason *my_reason = &get_cpu_var(pf_reason); - struct mm_io_header_rw *my_trace = &get_cpu_var(cpu_trace); + struct mmiotrace_rw *my_trace = &get_cpu_var(cpu_trace); /* this should always return the active_trace count to 0 */ my_reason->active_traces--; @@ -282,20 +265,13 @@ static void post(struct kmmio_probe *p, unsigned long condition, switch (my_reason->type) { case REG_READ: - my_trace->rw.value = get_ins_reg_val(my_reason->ip, regs); + my_trace->value = get_ins_reg_val(my_reason->ip, regs); break; default: break; } - /* - * XXX: Several required values are ignored: - * - mapping id - * - program counter - * Also the address should be physical, not virtual. - */ - mmio_trace_record(my_trace->header.type, my_trace->rw.address, - my_trace->rw.value); + mmio_trace_rw(my_trace); put_cpu_var(cpu_trace); put_cpu_var(pf_reason); } @@ -305,21 +281,11 @@ static void ioremap_trace_core(unsigned long offset, unsigned long size, { static atomic_t next_id; struct remap_trace *trace = kmalloc(sizeof(*trace), GFP_KERNEL); - struct mm_io_header_map event = { - .header = { - .type = MMIO_MAGIC | - (MMIO_PROBE << MMIO_OPCODE_SHIFT), - .sec = 0, - .nsec = 0, - .pid = 0, - .data_len = sizeof(struct mm_io_map) - }, - .map = { - .phys = offset, - .addr = (unsigned long)addr, - .len = size, - .pc = 0 - } + struct mmiotrace_map map = { + .phys = offset, + .virt = (unsigned long)addr, + .len = size, + .opcode = MMIO_PROBE }; if (!trace) { @@ -338,15 +304,13 @@ static void ioremap_trace_core(unsigned long offset, unsigned long size, .phys = offset, .id = atomic_inc_return(&next_id) }; + map.map_id = trace->id; spin_lock_irq(&trace_lock); if (!is_enabled()) goto not_enabled; - /* - * XXX: Insufficient data recorded! - */ - mmio_trace_record(event.header.type, event.map.addr, event.map.len); + mmio_trace_mapping(&map); list_add_tail(&trace->list, &trace_list); if (!nommiotrace) register_kmmio_probe(&trace->probe); @@ -369,21 +333,11 @@ mmiotrace_ioremap(unsigned long offset, unsigned long size, void __iomem *addr) static void iounmap_trace_core(volatile void __iomem *addr) { - struct mm_io_header_map event = { - .header = { - .type = MMIO_MAGIC | - (MMIO_UNPROBE << MMIO_OPCODE_SHIFT), - .sec = 0, - .nsec = 0, - .pid = 0, - .data_len = sizeof(struct mm_io_map) - }, - .map = { - .phys = 0, - .addr = (unsigned long)addr, - .len = 0, - .pc = 0 - } + struct mmiotrace_map map = { + .phys = 0, + .virt = (unsigned long)addr, + .len = 0, + .opcode = MMIO_UNPROBE }; struct remap_trace *trace; struct remap_trace *tmp; @@ -404,8 +358,8 @@ static void iounmap_trace_core(volatile void __iomem *addr) break; } } - mmio_trace_record(event.header.type, event.map.addr, - found_trace ? found_trace->id : -1); + map.map_id = (found_trace) ? found_trace->id : -1; + mmio_trace_mapping(&map); not_enabled: spin_unlock_irq(&trace_lock); @@ -448,10 +402,12 @@ static void clear_trace_list(void) } } +#if 0 /* XXX: out of order */ static struct file_operations fops_marker = { .owner = THIS_MODULE, .write = write_marker }; +#endif void enable_mmiotrace(void) { @@ -464,9 +420,9 @@ void enable_mmiotrace(void) #if 0 /* XXX: tracing does not support text entries */ marker_file = debugfs_create_file("marker", 0660, dir, NULL, &fops_marker); -#endif if (!marker_file) pr_err(NAME "marker file creation failed.\n"); +#endif if (nommiotrace) pr_info(NAME "MMIO tracing disabled.\n"); @@ -502,17 +458,3 @@ void disable_mmiotrace(void) out: mutex_unlock(&mmiotrace_mutex); } - -int __init init_mmiotrace(void) -{ - pr_debug(NAME "load...\n"); - if (n_subbufs < 2) - return -EINVAL; - - dir = debugfs_create_dir(APP_DIR, NULL); - if (!dir) { - pr_err(NAME "Couldn't create relay app directory.\n"); - return -ENOMEM; - } - return 0; -} diff --git a/include/linux/mmiotrace.h b/include/linux/mmiotrace.h index 579b3b06c90..c88a9c197d2 100644 --- a/include/linux/mmiotrace.h +++ b/include/linux/mmiotrace.h @@ -54,73 +54,38 @@ static inline void mmiotrace_iounmap(volatile void __iomem *addr) } #endif /* CONFIG_MMIOTRACE_HOOKS */ -/* in kernel/trace/trace_mmiotrace.c */ -extern int __init init_mmiotrace(void); -extern void enable_mmiotrace(void); -extern void disable_mmiotrace(void); -extern void mmio_trace_record(u32 type, unsigned long addr, unsigned long arg); - -#endif /* __KERNEL__ */ - - -/* - * If you change anything here, you must bump MMIO_VERSION. - * This is the relay data format for user space. - */ -#define MMIO_VERSION 0x04 - -/* mm_io_header.type */ -#define MMIO_OPCODE_MASK 0xff -#define MMIO_OPCODE_SHIFT 0 -#define MMIO_WIDTH_MASK 0xff00 -#define MMIO_WIDTH_SHIFT 8 -#define MMIO_MAGIC (0x6f000000 | (MMIO_VERSION<<16)) -#define MMIO_MAGIC_MASK 0xffff0000 - -enum mm_io_opcode { /* payload type: */ - MMIO_READ = 0x1, /* struct mm_io_rw */ - MMIO_WRITE = 0x2, /* struct mm_io_rw */ - MMIO_PROBE = 0x3, /* struct mm_io_map */ - MMIO_UNPROBE = 0x4, /* struct mm_io_map */ +enum mm_io_opcode { + MMIO_READ = 0x1, /* struct mmiotrace_rw */ + MMIO_WRITE = 0x2, /* struct mmiotrace_rw */ + MMIO_PROBE = 0x3, /* struct mmiotrace_map */ + MMIO_UNPROBE = 0x4, /* struct mmiotrace_map */ MMIO_MARKER = 0x5, /* raw char data */ - MMIO_UNKNOWN_OP = 0x6, /* struct mm_io_rw */ + MMIO_UNKNOWN_OP = 0x6, /* struct mmiotrace_rw */ }; -struct mm_io_header { - __u32 type; /* see MMIO_* macros above */ - __u32 sec; /* timestamp */ - __u32 nsec; - __u32 pid; /* PID of the process, or 0 for kernel core */ - __u16 data_len; /* length of the following payload */ +struct mmiotrace_rw { + unsigned long phys; /* PCI address of register */ + unsigned long value; + unsigned long pc; /* optional program counter */ + int map_id; + unsigned char opcode; /* one of MMIO_{READ,WRITE,UNKNOWN_OP} */ + unsigned char width; /* size of register access in bytes */ }; -struct mm_io_rw { - __u64 address; /* virtual address of register */ - __u64 value; - __u64 pc; /* optional program counter */ +struct mmiotrace_map { + unsigned long phys; /* base address in PCI space */ + unsigned long virt; /* base virtual address */ + unsigned long len; /* mapping size */ + int map_id; + unsigned char opcode; /* MMIO_PROBE or MMIO_UNPROBE */ }; -struct mm_io_map { - __u64 phys; /* base address in PCI space */ - __u64 addr; /* base virtual address */ - __u64 len; /* mapping size */ - __u64 pc; /* optional program counter */ -}; - - -/* - * These structures are used to allow a single relay_write() - * call to write a full packet. - */ - -struct mm_io_header_rw { - struct mm_io_header header; - struct mm_io_rw rw; -} __attribute__((packed)); +/* in kernel/trace/trace_mmiotrace.c */ +extern void enable_mmiotrace(void); +extern void disable_mmiotrace(void); +extern void mmio_trace_rw(struct mmiotrace_rw *rw); +extern void mmio_trace_mapping(struct mmiotrace_map *map); -struct mm_io_header_map { - struct mm_io_header header; - struct mm_io_map map; -} __attribute__((packed)); +#endif /* __KERNEL__ */ #endif /* MMIOTRACE_H */ diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index 3271916ff03..d14fe49e963 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -831,6 +831,40 @@ ftrace(struct trace_array *tr, struct trace_array_cpu *data, trace_function(tr, data, ip, parent_ip, flags); } +#ifdef CONFIG_MMIOTRACE +void __trace_mmiotrace_rw(struct trace_array *tr, struct trace_array_cpu *data, + struct mmiotrace_rw *rw) +{ + struct trace_entry *entry; + unsigned long irq_flags; + + spin_lock_irqsave(&data->lock, irq_flags); + entry = tracing_get_trace_entry(tr, data); + tracing_generic_entry_update(entry, 0); + entry->type = TRACE_MMIO_RW; + entry->mmiorw = *rw; + spin_unlock_irqrestore(&data->lock, irq_flags); + + trace_wake_up(); +} + +void __trace_mmiotrace_map(struct trace_array *tr, struct trace_array_cpu *data, + struct mmiotrace_map *map) +{ + struct trace_entry *entry; + unsigned long irq_flags; + + spin_lock_irqsave(&data->lock, irq_flags); + entry = tracing_get_trace_entry(tr, data); + tracing_generic_entry_update(entry, 0); + entry->type = TRACE_MMIO_MAP; + entry->mmiomap = *map; + spin_unlock_irqrestore(&data->lock, irq_flags); + + trace_wake_up(); +} +#endif + void __trace_stack(struct trace_array *tr, struct trace_array_cpu *data, unsigned long flags, diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index c460e85e94e..0ef9ef74c80 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -5,6 +5,7 @@ #include <asm/atomic.h> #include <linux/sched.h> #include <linux/clocksource.h> +#include <linux/mmiotrace.h> enum trace_type { __TRACE_FIRST_TYPE = 0, @@ -14,6 +15,8 @@ enum trace_type { TRACE_WAKE, TRACE_STACK, TRACE_SPECIAL, + TRACE_MMIO_RW, + TRACE_MMIO_MAP, __TRACE_LAST_TYPE }; @@ -75,6 +78,8 @@ struct trace_entry { struct ctx_switch_entry ctx; struct special_entry special; struct stack_entry stack; + struct mmiotrace_rw mmiorw; + struct mmiotrace_map mmiomap; }; }; @@ -255,6 +260,15 @@ extern unsigned long ftrace_update_tot_cnt; extern int DYN_FTRACE_TEST_NAME(void); #endif +#ifdef CONFIG_MMIOTRACE +extern void __trace_mmiotrace_rw(struct trace_array *tr, + struct trace_array_cpu *data, + struct mmiotrace_rw *rw); +extern void __trace_mmiotrace_map(struct trace_array *tr, + struct trace_array_cpu *data, + struct mmiotrace_map *map); +#endif + #ifdef CONFIG_FTRACE_STARTUP_TEST #ifdef CONFIG_FTRACE extern int trace_selftest_startup_function(struct tracer *trace, diff --git a/kernel/trace/trace_mmiotrace.c b/kernel/trace/trace_mmiotrace.c index e4dd03cc5aa..3a12b1ad0c6 100644 --- a/kernel/trace/trace_mmiotrace.c +++ b/kernel/trace/trace_mmiotrace.c @@ -11,19 +11,26 @@ #include "trace.h" -extern void -__trace_special(void *__tr, void *__data, - unsigned long arg1, unsigned long arg2, unsigned long arg3); - static struct trace_array *mmio_trace_array; +static void mmio_reset_data(struct trace_array *tr) +{ + int cpu; + + tr->time_start = ftrace_now(tr->cpu); + + for_each_online_cpu(cpu) + tracing_reset(tr->data[cpu]); +} static void mmio_trace_init(struct trace_array *tr) { pr_debug("in %s\n", __func__); mmio_trace_array = tr; - if (tr->ctrl) + if (tr->ctrl) { + mmio_reset_data(tr); enable_mmiotrace(); + } } static void mmio_trace_reset(struct trace_array *tr) @@ -31,15 +38,110 @@ static void mmio_trace_reset(struct trace_array *tr) pr_debug("in %s\n", __func__); if (tr->ctrl) disable_mmiotrace(); + mmio_reset_data(tr); + mmio_trace_array = NULL; } static void mmio_trace_ctrl_update(struct trace_array *tr) { pr_debug("in %s\n", __func__); - if (tr->ctrl) + if (tr->ctrl) { + mmio_reset_data(tr); enable_mmiotrace(); - else + } else { disable_mmiotrace(); + } +} + +/* XXX: This is not called for trace_pipe file! */ +void mmio_print_header(struct trace_iterator *iter) +{ + struct trace_seq *s = &iter->seq; + trace_seq_printf(s, "VERSION broken 20070824\n"); + /* TODO: print /proc/bus/pci/devices contents as PCIDEV lines */ +} + +static int mmio_print_rw(struct trace_iterator *iter) +{ + struct trace_entry *entry = iter->ent; + struct mmiotrace_rw *rw = &entry->mmiorw; + struct trace_seq *s = &iter->seq; + unsigned long long t = ns2usecs(entry->t); + unsigned long usec_rem = do_div(t, 1000000ULL); + unsigned secs = (unsigned long)t; + int ret = 1; + + switch (entry->mmiorw.opcode) { + case MMIO_READ: + ret = trace_seq_printf(s, + "R %d %lu.%06lu %d 0x%lx 0x%lx 0x%lx %d\n", + rw->width, secs, usec_rem, rw->map_id, rw->phys, + rw->value, rw->pc, entry->pid); + break; + case MMIO_WRITE: + ret = trace_seq_printf(s, + "W %d %lu.%06lu %d 0x%lx 0x%lx 0x%lx %d\n", + rw->width, secs, usec_rem, rw->map_id, rw->phys, + rw->value, rw->pc, entry->pid); + break; + case MMIO_UNKNOWN_OP: + ret = trace_seq_printf(s, + "UNKNOWN %lu.%06lu %d 0x%lx %02x,%02x,%02x 0x%lx %d\n", + secs, usec_rem, rw->map_id, rw->phys, + (rw->value >> 16) & 0xff, (rw->value >> 8) & 0xff, + (rw->value >> 0) & 0xff, rw->pc, entry->pid); + break; + default: + ret = trace_seq_printf(s, "rw what?\n"); + break; + } + if (ret) + return 1; + return 0; +} + +static int mmio_print_map(struct trace_iterator *iter) +{ + struct trace_entry *entry = iter->ent; + struct mmiotrace_map *m = &entry->mmiomap; + struct trace_seq *s = &iter->seq; + unsigned long long t = ns2usecs(entry->t); + unsigned long usec_rem = do_div(t, 1000000ULL); + unsigned secs = (unsigned long)t; + int ret = 1; + + switch (entry->mmiorw.opcode) { + case MMIO_PROBE: + ret = trace_seq_printf(s, + "MAP %lu.%06lu %d 0x%lx 0x%lx 0x%lx 0x%lx %d\n", + secs, usec_rem, m->map_id, m->phys, m->virt, m->len, + 0UL, entry->pid); + break; + case MMIO_UNPROBE: + ret = trace_seq_printf(s, + "UNMAP %lu.%06lu %d 0x%lx %d\n", + secs, usec_rem, m->map_id, 0UL, entry->pid); + break; + default: + ret = trace_seq_printf(s, "map what?\n"); + break; + } + if (ret) + return 1; + return 0; +} + +/* return 0 to abort printing without consuming current entry in pipe mode */ +static int mmio_print_line(struct trace_iterator *iter) +{ + switch (iter->ent->type) { + case TRACE_MMIO_RW: + return mmio_print_rw(iter); + case TRACE_MMIO_MAP: + return mmio_print_map(iter); + default: + return 1; /* ignore unknown entries */ + } } static struct tracer mmio_tracer __read_mostly = @@ -47,38 +149,31 @@ static struct tracer mmio_tracer __read_mostly = .name = "mmiotrace", .init = mmio_trace_init, .reset = mmio_trace_reset, + .open = mmio_print_header, .ctrl_update = mmio_trace_ctrl_update, + .print_line = mmio_print_line, }; __init static int init_mmio_trace(void) { - int ret = init_mmiotrace(); - if (ret) - return ret; return register_tracer(&mmio_tracer); } device_initcall(init_mmio_trace); -void mmio_trace_record(u32 type, unsigned long addr, unsigned long arg) +void mmio_trace_rw(struct mmiotrace_rw *rw) { struct trace_array *tr = mmio_trace_array; struct trace_array_cpu *data = tr->data[smp_processor_id()]; + __trace_mmiotrace_rw(tr, data, rw); +} - if (!current || current->pid == 0) { - /* - * XXX: This is a problem. We need to able to record, no - * matter what. tracing_generic_entry_update() would crash. - */ - static unsigned limit; - if (limit++ < 12) - pr_err("Error in %s: no current.\n", __func__); - return; - } - if (!tr || !data) { - static unsigned limit; - if (limit++ < 12) - pr_err("%s: no tr or data\n", __func__); - return; - } - __trace_special(tr, data, type, addr, arg); +void mmio_trace_mapping(struct mmiotrace_map *map) +{ + struct trace_array *tr = mmio_trace_array; + struct trace_array_cpu *data; + + preempt_disable(); + data = tr->data[smp_processor_id()]; + __trace_mmiotrace_map(tr, data, map); + preempt_enable(); } |