summaryrefslogtreecommitdiffstats
path: root/arch/powerpc/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/powerpc/kernel')
-rw-r--r--arch/powerpc/kernel/entry_32.S17
-rw-r--r--arch/powerpc/kernel/entry_64.S10
-rw-r--r--arch/powerpc/kernel/legacy_serial.c44
-rw-r--r--arch/powerpc/kernel/process.c8
-rw-r--r--arch/powerpc/kernel/prom_init.c39
-rw-r--r--arch/powerpc/kernel/ptrace.c54
-rw-r--r--arch/powerpc/kernel/setup-common.c24
-rw-r--r--arch/powerpc/kernel/setup_64.c3
-rw-r--r--arch/powerpc/kernel/signal.c23
-rw-r--r--arch/powerpc/kernel/smp.c119
-rw-r--r--arch/powerpc/kernel/stacktrace.c1
-rw-r--r--arch/powerpc/kernel/sysfs.c311
-rw-r--r--arch/powerpc/kernel/vio.c6
13 files changed, 517 insertions, 142 deletions
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 81c8324a4a3c..1cbbf7033641 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -148,7 +148,7 @@ transfer_to_handler:
/* Check to see if the dbcr0 register is set up to debug. Use the
internal debug mode bit to do this. */
lwz r12,THREAD_DBCR0(r12)
- andis. r12,r12,(DBCR0_IDM | DBSR_DAC1R | DBSR_DAC1W)@h
+ andis. r12,r12,DBCR0_IDM@h
beq+ 3f
/* From user and task is ptraced - load up global dbcr0 */
li r12,-1 /* clear all pending debug events */
@@ -292,7 +292,7 @@ syscall_exit_cont:
/* If the process has its own DBCR0 value, load it up. The internal
debug mode bit tells us that dbcr0 should be loaded. */
lwz r0,THREAD+THREAD_DBCR0(r2)
- andis. r10,r0,(DBCR0_IDM | DBSR_DAC1R | DBSR_DAC1W)@h
+ andis. r10,r0,DBCR0_IDM@h
bnel- load_dbcr0
#endif
#ifdef CONFIG_44x
@@ -343,7 +343,12 @@ syscall_dotrace:
stw r0,_TRAP(r1)
addi r3,r1,STACK_FRAME_OVERHEAD
bl do_syscall_trace_enter
- lwz r0,GPR0(r1) /* Restore original registers */
+ /*
+ * Restore argument registers possibly just changed.
+ * We use the return value of do_syscall_trace_enter
+ * for call number to look up in the table (r0).
+ */
+ mr r0,r3
lwz r3,GPR3(r1)
lwz r4,GPR4(r1)
lwz r5,GPR5(r1)
@@ -720,7 +725,7 @@ restore_user:
/* Check whether this process has its own DBCR0 value. The internal
debug mode bit tells us that dbcr0 should be loaded. */
lwz r0,THREAD+THREAD_DBCR0(r2)
- andis. r10,r0,(DBCR0_IDM | DBSR_DAC1R | DBSR_DAC1W)@h
+ andis. r10,r0,DBCR0_IDM@h
bnel- load_dbcr0
#endif
@@ -1055,8 +1060,8 @@ do_user_signal: /* r10 contains MSR_KERNEL here */
SAVE_NVGPRS(r1)
rlwinm r3,r3,0,0,30
stw r3,_TRAP(r1)
-2: li r3,0
- addi r4,r1,STACK_FRAME_OVERHEAD
+2: addi r3,r1,STACK_FRAME_OVERHEAD
+ mr r4,r9
bl do_signal
REST_NVGPRS(r1)
b recheck
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index d7369243ae44..2d802e97097c 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -214,7 +214,12 @@ syscall_dotrace:
bl .save_nvgprs
addi r3,r1,STACK_FRAME_OVERHEAD
bl .do_syscall_trace_enter
- ld r0,GPR0(r1) /* Restore original registers */
+ /*
+ * Restore argument registers possibly just changed.
+ * We use the return value of do_syscall_trace_enter
+ * for the call number to look up in the table (r0).
+ */
+ mr r0,r3
ld r3,GPR3(r1)
ld r4,GPR4(r1)
ld r5,GPR5(r1)
@@ -638,8 +643,7 @@ user_work:
b .ret_from_except_lite
1: bl .save_nvgprs
- li r3,0
- addi r4,r1,STACK_FRAME_OVERHEAD
+ addi r3,r1,STACK_FRAME_OVERHEAD
bl .do_signal
b .ret_from_except
diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
index 4d96e1db55ee..9ddfaef1a184 100644
--- a/arch/powerpc/kernel/legacy_serial.c
+++ b/arch/powerpc/kernel/legacy_serial.c
@@ -493,18 +493,18 @@ static int __init serial_dev_init(void)
device_initcall(serial_dev_init);
+#ifdef CONFIG_SERIAL_8250_CONSOLE
/*
* This is called very early, as part of console_init() (typically just after
* time_init()). This function is respondible for trying to find a good
* default console on serial ports. It tries to match the open firmware
- * default output with one of the available serial console drivers, either
- * one of the platform serial ports that have been probed earlier by
- * find_legacy_serial_ports() or some more platform specific ones.
+ * default output with one of the available serial console drivers that have
+ * been probed earlier by find_legacy_serial_ports()
*/
static int __init check_legacy_serial_console(void)
{
struct device_node *prom_stdout = NULL;
- int speed = 0, offset = 0;
+ int i, speed = 0, offset = 0;
const char *name;
const u32 *spd;
@@ -548,31 +548,20 @@ static int __init check_legacy_serial_console(void)
if (spd)
speed = *spd;
- if (0)
- ;
-#ifdef CONFIG_SERIAL_8250_CONSOLE
- else if (strcmp(name, "serial") == 0) {
- int i;
- /* Look for it in probed array */
- for (i = 0; i < legacy_serial_count; i++) {
- if (prom_stdout != legacy_serial_infos[i].np)
- continue;
- offset = i;
- speed = legacy_serial_infos[i].speed;
- break;
- }
- if (i >= legacy_serial_count)
- goto not_found;
+ if (strcmp(name, "serial") != 0)
+ goto not_found;
+
+ /* Look for it in probed array */
+ for (i = 0; i < legacy_serial_count; i++) {
+ if (prom_stdout != legacy_serial_infos[i].np)
+ continue;
+ offset = i;
+ speed = legacy_serial_infos[i].speed;
+ break;
}
-#endif /* CONFIG_SERIAL_8250_CONSOLE */
-#ifdef CONFIG_SERIAL_PMACZILOG_CONSOLE
- else if (strcmp(name, "ch-a") == 0)
- offset = 0;
- else if (strcmp(name, "ch-b") == 0)
- offset = 1;
-#endif /* CONFIG_SERIAL_PMACZILOG_CONSOLE */
- else
+ if (i >= legacy_serial_count)
goto not_found;
+
of_node_put(prom_stdout);
DBG("Found serial console at ttyS%d\n", offset);
@@ -591,3 +580,4 @@ static int __init check_legacy_serial_console(void)
}
console_initcall(check_legacy_serial_console);
+#endif /* CONFIG_SERIAL_8250_CONSOLE */
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index db2497ccc111..e030f3bd5024 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -254,7 +254,7 @@ void do_dabr(struct pt_regs *regs, unsigned long address,
return;
/* Clear the DAC and struct entries. One shot trigger */
-#if (defined(CONFIG_44x) || defined(CONFIG_BOOKE))
+#if defined(CONFIG_BOOKE)
mtspr(SPRN_DBCR0, mfspr(SPRN_DBCR0) & ~(DBSR_DAC1R | DBSR_DAC1W
| DBCR0_IDM));
#endif
@@ -286,7 +286,7 @@ int set_dabr(unsigned long dabr)
mtspr(SPRN_DABR, dabr);
#endif
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
mtspr(SPRN_DAC1, dabr);
#endif
@@ -373,7 +373,7 @@ struct task_struct *__switch_to(struct task_struct *prev,
if (unlikely(__get_cpu_var(current_dabr) != new->thread.dabr))
set_dabr(new->thread.dabr);
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
/* If new thread DAC (HW breakpoint) is the same then leave it */
if (new->thread.dabr)
set_dabr(new->thread.dabr);
@@ -568,7 +568,7 @@ void flush_thread(void)
current->thread.dabr = 0;
set_dabr(0);
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
current->thread.dbcr0 &= ~(DBSR_DAC1R | DBSR_DAC1W);
#endif
}
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index c4ab2195b9cb..b72849ac7db3 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -205,8 +205,6 @@ static int __initdata mem_reserve_cnt;
static cell_t __initdata regbuf[1024];
-#define MAX_CPU_THREADS 2
-
/*
* Error results ... some OF calls will return "-1" on error, some
* will return 0, some will return either. To simplify, here are
@@ -1339,10 +1337,6 @@ static void __init prom_hold_cpus(void)
unsigned int reg;
phandle node;
char type[64];
- int cpuid = 0;
- unsigned int interrupt_server[MAX_CPU_THREADS];
- unsigned int cpu_threads, hw_cpu_num;
- int propsize;
struct prom_t *_prom = &RELOC(prom);
unsigned long *spinloop
= (void *) LOW_ADDR(__secondary_hold_spinloop);
@@ -1386,7 +1380,6 @@ static void __init prom_hold_cpus(void)
reg = -1;
prom_getprop(node, "reg", &reg, sizeof(reg));
- prom_debug("\ncpuid = 0x%x\n", cpuid);
prom_debug("cpu hw idx = 0x%x\n", reg);
/* Init the acknowledge var which will be reset by
@@ -1395,28 +1388,9 @@ static void __init prom_hold_cpus(void)
*/
*acknowledge = (unsigned long)-1;
- propsize = prom_getprop(node, "ibm,ppc-interrupt-server#s",
- &interrupt_server,
- sizeof(interrupt_server));
- if (propsize < 0) {
- /* no property. old hardware has no SMT */
- cpu_threads = 1;
- interrupt_server[0] = reg; /* fake it with phys id */
- } else {
- /* We have a threaded processor */
- cpu_threads = propsize / sizeof(u32);
- if (cpu_threads > MAX_CPU_THREADS) {
- prom_printf("SMT: too many threads!\n"
- "SMT: found %x, max is %x\n",
- cpu_threads, MAX_CPU_THREADS);
- cpu_threads = 1; /* ToDo: panic? */
- }
- }
-
- hw_cpu_num = interrupt_server[0];
- if (hw_cpu_num != _prom->cpu) {
+ if (reg != _prom->cpu) {
/* Primary Thread of non-boot cpu */
- prom_printf("%x : starting cpu hw idx %x... ", cpuid, reg);
+ prom_printf("starting cpu hw idx %x... ", reg);
call_prom("start-cpu", 3, 0, node,
secondary_hold, reg);
@@ -1431,17 +1405,10 @@ static void __init prom_hold_cpus(void)
}
#ifdef CONFIG_SMP
else
- prom_printf("%x : boot cpu %x\n", cpuid, reg);
+ prom_printf("boot cpu hw idx %x\n", reg);
#endif /* CONFIG_SMP */
-
- /* Reserve cpu #s for secondary threads. They start later. */
- cpuid += cpu_threads;
}
- if (cpuid > NR_CPUS)
- prom_printf("WARNING: maximum CPUs (" __stringify(NR_CPUS)
- ") exceeded: ignoring extras\n");
-
prom_debug("prom_hold_cpus: end...\n");
}
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index a5d0e78779c8..6b66cd85b433 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -22,6 +22,7 @@
#include <linux/errno.h>
#include <linux/ptrace.h>
#include <linux/regset.h>
+#include <linux/tracehook.h>
#include <linux/elf.h>
#include <linux/user.h>
#include <linux/security.h>
@@ -717,7 +718,7 @@ void user_disable_single_step(struct task_struct *task)
struct pt_regs *regs = task->thread.regs;
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
/* If DAC then do not single step, skip */
if (task->thread.dabr)
return;
@@ -744,10 +745,11 @@ int ptrace_set_debugreg(struct task_struct *task, unsigned long addr,
if (addr > 0)
return -EINVAL;
+ /* The bottom 3 bits in dabr are flags */
if ((data & ~0x7UL) >= TASK_SIZE)
return -EIO;
-#ifdef CONFIG_PPC64
+#ifndef CONFIG_BOOKE
/* For processors using DABR (i.e. 970), the bottom 3 bits are flags.
* It was assumed, on previous implementations, that 3 bits were
@@ -769,7 +771,7 @@ int ptrace_set_debugreg(struct task_struct *task, unsigned long addr,
task->thread.dabr = data;
#endif
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
/* As described above, it was assumed 3 bits were passed with the data
* address, but we will assume only the mode bits will be passed
@@ -1013,31 +1015,24 @@ long arch_ptrace(struct task_struct *child, long request, long addr, long data)
return ret;
}
-static void do_syscall_trace(void)
+/*
+ * We must return the syscall number to actually look up in the table.
+ * This can be -1L to skip running any syscall at all.
+ */
+long do_syscall_trace_enter(struct pt_regs *regs)
{
- /* the 0x80 provides a way for the tracing parent to distinguish
- between a syscall stop and SIGTRAP delivery */
- ptrace_notify(SIGTRAP | ((current->ptrace & PT_TRACESYSGOOD)
- ? 0x80 : 0));
-
- /*
- * this isn't the same as continuing with a signal, but it will do
- * for normal use. strace only continues with a signal if the
- * stopping signal is not SIGTRAP. -brl
- */
- if (current->exit_code) {
- send_sig(current->exit_code, current, 1);
- current->exit_code = 0;
- }
-}
+ long ret = 0;
-void do_syscall_trace_enter(struct pt_regs *regs)
-{
secure_computing(regs->gpr[0]);
- if (test_thread_flag(TIF_SYSCALL_TRACE)
- && (current->ptrace & PT_PTRACED))
- do_syscall_trace();
+ if (test_thread_flag(TIF_SYSCALL_TRACE) &&
+ tracehook_report_syscall_entry(regs))
+ /*
+ * Tracing decided this syscall should not happen.
+ * We'll return a bogus call number to get an ENOSYS
+ * error, but leave the original number in regs->gpr[0].
+ */
+ ret = -1L;
if (unlikely(current->audit_context)) {
#ifdef CONFIG_PPC64
@@ -1055,16 +1050,19 @@ void do_syscall_trace_enter(struct pt_regs *regs)
regs->gpr[5] & 0xffffffff,
regs->gpr[6] & 0xffffffff);
}
+
+ return ret ?: regs->gpr[0];
}
void do_syscall_trace_leave(struct pt_regs *regs)
{
+ int step;
+
if (unlikely(current->audit_context))
audit_syscall_exit((regs->ccr&0x10000000)?AUDITSC_FAILURE:AUDITSC_SUCCESS,
regs->result);
- if ((test_thread_flag(TIF_SYSCALL_TRACE)
- || test_thread_flag(TIF_SINGLESTEP))
- && (current->ptrace & PT_PTRACED))
- do_syscall_trace();
+ step = test_thread_flag(TIF_SINGLESTEP);
+ if (step || test_thread_flag(TIF_SYSCALL_TRACE))
+ tracehook_report_syscall_exit(regs, step);
}
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 61a3f4132087..9cc5a52711e5 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -367,7 +367,6 @@ static void __init cpu_init_thread_core_maps(int tpc)
* setup_cpu_maps - initialize the following cpu maps:
* cpu_possible_map
* cpu_present_map
- * cpu_sibling_map
*
* Having the possible map set up early allows us to restrict allocations
* of things like irqstacks to num_possible_cpus() rather than NR_CPUS.
@@ -475,29 +474,6 @@ void __init smp_setup_cpu_maps(void)
*/
cpu_init_thread_core_maps(nthreads);
}
-
-/*
- * Being that cpu_sibling_map is now a per_cpu array, then it cannot
- * be initialized until the per_cpu areas have been created. This
- * function is now called from setup_per_cpu_areas().
- */
-void __init smp_setup_cpu_sibling_map(void)
-{
-#ifdef CONFIG_PPC64
- int i, cpu, base;
-
- for_each_possible_cpu(cpu) {
- DBG("Sibling map for CPU %d:", cpu);
- base = cpu_first_thread_in_core(cpu);
- for (i = 0; i < threads_per_core; i++) {
- cpu_set(base + i, per_cpu(cpu_sibling_map, cpu));
- DBG(" %d", base + i);
- }
- DBG("\n");
- }
-
-#endif /* CONFIG_PPC64 */
-}
#endif /* CONFIG_SMP */
#ifdef CONFIG_PCSPKR_PLATFORM
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 04d8de9f0fc6..8b25f51f03bf 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -611,9 +611,6 @@ void __init setup_per_cpu_areas(void)
paca[i].data_offset = ptr - __per_cpu_start;
memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
}
-
- /* Now that per_cpu is setup, initialize cpu_sibling_map */
- smp_setup_cpu_sibling_map();
}
#endif
diff --git a/arch/powerpc/kernel/signal.c b/arch/powerpc/kernel/signal.c
index 7aada783ec6a..a54405ebd7b0 100644
--- a/arch/powerpc/kernel/signal.c
+++ b/arch/powerpc/kernel/signal.c
@@ -9,7 +9,7 @@
* this archive for more details.
*/
-#include <linux/ptrace.h>
+#include <linux/tracehook.h>
#include <linux/signal.h>
#include <asm/uaccess.h>
#include <asm/unistd.h>
@@ -112,7 +112,7 @@ static void check_syscall_restart(struct pt_regs *regs, struct k_sigaction *ka,
}
}
-int do_signal(sigset_t *oldset, struct pt_regs *regs)
+static int do_signal_pending(sigset_t *oldset, struct pt_regs *regs)
{
siginfo_t info;
int signr;
@@ -147,7 +147,7 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
*/
if (current->thread.dabr) {
set_dabr(current->thread.dabr);
-#if defined(CONFIG_44x) || defined(CONFIG_BOOKE)
+#if defined(CONFIG_BOOKE)
mtspr(SPRN_DBCR0, current->thread.dbcr0);
#endif
}
@@ -177,11 +177,28 @@ int do_signal(sigset_t *oldset, struct pt_regs *regs)
* its frame, and we can clear the TLF_RESTORE_SIGMASK flag.
*/
current_thread_info()->local_flags &= ~_TLF_RESTORE_SIGMASK;
+
+ /*
+ * Let tracing know that we've done the handler setup.
+ */
+ tracehook_signal_handler(signr, &info, &ka, regs,
+ test_thread_flag(TIF_SINGLESTEP));
}
return ret;
}
+void do_signal(struct pt_regs *regs, unsigned long thread_info_flags)
+{
+ if (thread_info_flags & _TIF_SIGPENDING)
+ do_signal_pending(NULL, regs);
+
+ if (thread_info_flags & _TIF_NOTIFY_RESUME) {
+ clear_thread_flag(TIF_NOTIFY_RESUME);
+ tracehook_notify_resume(regs);
+ }
+}
+
long sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
unsigned long r5, unsigned long r6, unsigned long r7,
unsigned long r8, struct pt_regs *regs)
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index f5ae9fa222ea..5337ca7bb649 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -41,6 +41,7 @@
#include <asm/smp.h>
#include <asm/time.h>
#include <asm/machdep.h>
+#include <asm/cputhreads.h>
#include <asm/cputable.h>
#include <asm/system.h>
#include <asm/mpic.h>
@@ -62,10 +63,12 @@ struct thread_info *secondary_ti;
cpumask_t cpu_possible_map = CPU_MASK_NONE;
cpumask_t cpu_online_map = CPU_MASK_NONE;
DEFINE_PER_CPU(cpumask_t, cpu_sibling_map) = CPU_MASK_NONE;
+DEFINE_PER_CPU(cpumask_t, cpu_core_map) = CPU_MASK_NONE;
EXPORT_SYMBOL(cpu_online_map);
EXPORT_SYMBOL(cpu_possible_map);
EXPORT_PER_CPU_SYMBOL(cpu_sibling_map);
+EXPORT_PER_CPU_SYMBOL(cpu_core_map);
/* SMP operations for this machine */
struct smp_ops_t *smp_ops;
@@ -228,6 +231,8 @@ void __devinit smp_prepare_boot_cpu(void)
BUG_ON(smp_processor_id() != boot_cpuid);
cpu_set(boot_cpuid, cpu_online_map);
+ cpu_set(boot_cpuid, per_cpu(cpu_sibling_map, boot_cpuid));
+ cpu_set(boot_cpuid, per_cpu(cpu_core_map, boot_cpuid));
#ifdef CONFIG_PPC64
paca[boot_cpuid].__current = current;
#endif
@@ -375,11 +380,60 @@ int __cpuinit __cpu_up(unsigned int cpu)
return 0;
}
+/* Return the value of the reg property corresponding to the given
+ * logical cpu.
+ */
+int cpu_to_core_id(int cpu)
+{
+ struct device_node *np;
+ const int *reg;
+ int id = -1;
+
+ np = of_get_cpu_node(cpu, NULL);
+ if (!np)
+ goto out;
+
+ reg = of_get_property(np, "reg", NULL);
+ if (!reg)
+ goto out;
+
+ id = *reg;
+out:
+ of_node_put(np);
+ return id;
+}
+
+/* Must be called when no change can occur to cpu_present_map,
+ * i.e. during cpu online or offline.
+ */
+static struct device_node *cpu_to_l2cache(int cpu)
+{
+ struct device_node *np;
+ const phandle *php;
+ phandle ph;
+
+ if (!cpu_present(cpu))
+ return NULL;
+
+ np = of_get_cpu_node(cpu, NULL);
+ if (np == NULL)
+ return NULL;
+
+ php = of_get_property(np, "l2-cache", NULL);
+ if (php == NULL)
+ return NULL;
+ ph = *php;
+ of_node_put(np);
+
+ return of_find_node_by_phandle(ph);
+}
/* Activate a secondary processor. */
int __devinit start_secondary(void *unused)
{
unsigned int cpu = smp_processor_id();
+ struct device_node *l2_cache;
+ int i, base;
atomic_inc(&init_mm.mm_count);
current->active_mm = &init_mm;
@@ -400,6 +454,33 @@ int __devinit start_secondary(void *unused)
ipi_call_lock();
cpu_set(cpu, cpu_online_map);
+ /* Update sibling maps */
+ base = cpu_first_thread_in_core(cpu);
+ for (i = 0; i < threads_per_core; i++) {
+ if (cpu_is_offline(base + i))
+ continue;
+ cpu_set(cpu, per_cpu(cpu_sibling_map, base + i));
+ cpu_set(base + i, per_cpu(cpu_sibling_map, cpu));
+
+ /* cpu_core_map should be a superset of
+ * cpu_sibling_map even if we don't have cache
+ * information, so update the former here, too.
+ */
+ cpu_set(cpu, per_cpu(cpu_core_map, base +i));
+ cpu_set(base + i, per_cpu(cpu_core_map, cpu));
+ }
+ l2_cache = cpu_to_l2cache(cpu);
+ for_each_online_cpu(i) {
+ struct device_node *np = cpu_to_l2cache(i);
+ if (!np)
+ continue;
+ if (np == l2_cache) {
+ cpu_set(cpu, per_cpu(cpu_core_map, i));
+ cpu_set(i, per_cpu(cpu_core_map, cpu));
+ }
+ of_node_put(np);
+ }
+ of_node_put(l2_cache);
ipi_call_unlock();
local_irq_enable();
@@ -437,10 +518,42 @@ void __init smp_cpus_done(unsigned int max_cpus)
#ifdef CONFIG_HOTPLUG_CPU
int __cpu_disable(void)
{
- if (smp_ops->cpu_disable)
- return smp_ops->cpu_disable();
+ struct device_node *l2_cache;
+ int cpu = smp_processor_id();
+ int base, i;
+ int err;
- return -ENOSYS;
+ if (!smp_ops->cpu_disable)
+ return -ENOSYS;
+
+ err = smp_ops->cpu_disable();
+ if (err)
+ return err;
+
+ /* Update sibling maps */
+ base = cpu_first_thread_in_core(cpu);
+ for (i = 0; i < threads_per_core; i++) {
+ cpu_clear(cpu, per_cpu(cpu_sibling_map, base + i));
+ cpu_clear(base + i, per_cpu(cpu_sibling_map, cpu));
+ cpu_clear(cpu, per_cpu(cpu_core_map, base +i));
+ cpu_clear(base + i, per_cpu(cpu_core_map, cpu));
+ }
+
+ l2_cache = cpu_to_l2cache(cpu);
+ for_each_present_cpu(i) {
+ struct device_node *np = cpu_to_l2cache(i);
+ if (!np)
+ continue;
+ if (np == l2_cache) {
+ cpu_clear(cpu, per_cpu(cpu_core_map, i));
+ cpu_clear(i, per_cpu(cpu_core_map, cpu));
+ }
+ of_node_put(np);
+ }
+ of_node_put(l2_cache);
+
+
+ return 0;
}
void __cpu_die(unsigned int cpu)
diff --git a/arch/powerpc/kernel/stacktrace.c b/arch/powerpc/kernel/stacktrace.c
index f2589645870a..b0dbb1daa4df 100644
--- a/arch/powerpc/kernel/stacktrace.c
+++ b/arch/powerpc/kernel/stacktrace.c
@@ -13,7 +13,6 @@
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/stacktrace.h>
-#include <linux/module.h>
#include <asm/ptrace.h>
#include <asm/processor.h>
diff --git a/arch/powerpc/kernel/sysfs.c b/arch/powerpc/kernel/sysfs.c
index 800e5e9a087b..56d172d16e56 100644
--- a/arch/powerpc/kernel/sysfs.c
+++ b/arch/powerpc/kernel/sysfs.c
@@ -22,6 +22,8 @@
static DEFINE_PER_CPU(struct cpu, cpu_devices);
+static DEFINE_PER_CPU(struct kobject *, cache_toplevel);
+
/* SMT stuff */
#ifdef CONFIG_PPC_MULTIPLATFORM
@@ -297,8 +299,289 @@ static struct sysdev_attribute pa6t_attrs[] = {
#endif /* CONFIG_DEBUG_KERNEL */
};
+struct cache_desc {
+ struct kobject kobj;
+ struct cache_desc *next;
+ const char *type; /* Instruction, Data, or Unified */
+ u32 size; /* total cache size in KB */
+ u32 line_size; /* in bytes */
+ u32 nr_sets; /* number of sets */
+ u32 level; /* e.g. 1, 2, 3... */
+ u32 associativity; /* e.g. 8-way... 0 is fully associative */
+};
+
+DEFINE_PER_CPU(struct cache_desc *, cache_desc);
+
+static struct cache_desc *kobj_to_cache_desc(struct kobject *k)
+{
+ return container_of(k, struct cache_desc, kobj);
+}
+
+static void cache_desc_release(struct kobject *k)
+{
+ struct cache_desc *desc = kobj_to_cache_desc(k);
+
+ pr_debug("%s: releasing %s\n", __func__, kobject_name(k));
+
+ if (desc->next)
+ kobject_put(&desc->next->kobj);
+
+ kfree(kobj_to_cache_desc(k));
+}
+
+static ssize_t cache_desc_show(struct kobject *k, struct attribute *attr, char *buf)
+{
+ struct kobj_attribute *kobj_attr;
+
+ kobj_attr = container_of(attr, struct kobj_attribute, attr);
+
+ return kobj_attr->show(k, kobj_attr, buf);
+}
+
+static struct sysfs_ops cache_desc_sysfs_ops = {
+ .show = cache_desc_show,
+};
+
+static struct kobj_type cache_desc_type = {
+ .release = cache_desc_release,
+ .sysfs_ops = &cache_desc_sysfs_ops,
+};
+
+static ssize_t cache_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+ struct cache_desc *cache = kobj_to_cache_desc(k);
+
+ return sprintf(buf, "%uK\n", cache->size);
+}
+
+static struct kobj_attribute cache_size_attr =
+ __ATTR(size, 0444, cache_size_show, NULL);
+
+static ssize_t cache_line_size_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+ struct cache_desc *cache = kobj_to_cache_desc(k);
+
+ return sprintf(buf, "%u\n", cache->line_size);
+}
+
+static struct kobj_attribute cache_line_size_attr =
+ __ATTR(coherency_line_size, 0444, cache_line_size_show, NULL);
+
+static ssize_t cache_nr_sets_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+ struct cache_desc *cache = kobj_to_cache_desc(k);
+
+ return sprintf(buf, "%u\n", cache->nr_sets);
+}
+
+static struct kobj_attribute cache_nr_sets_attr =
+ __ATTR(number_of_sets, 0444, cache_nr_sets_show, NULL);
+
+static ssize_t cache_type_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+ struct cache_desc *cache = kobj_to_cache_desc(k);
+
+ return sprintf(buf, "%s\n", cache->type);
+}
+
+static struct kobj_attribute cache_type_attr =
+ __ATTR(type, 0444, cache_type_show, NULL);
+
+static ssize_t cache_level_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+ struct cache_desc *cache = kobj_to_cache_desc(k);
+
+ return sprintf(buf, "%u\n", cache->level);
+}
+
+static struct kobj_attribute cache_level_attr =
+ __ATTR(level, 0444, cache_level_show, NULL);
+
+static ssize_t cache_assoc_show(struct kobject *k, struct kobj_attribute *attr, char *buf)
+{
+ struct cache_desc *cache = kobj_to_cache_desc(k);
+
+ return sprintf(buf, "%u\n", cache->associativity);
+}
+
+static struct kobj_attribute cache_assoc_attr =
+ __ATTR(ways_of_associativity, 0444, cache_assoc_show, NULL);
+
+struct cache_desc_info {
+ const char *type;
+ const char *size_prop;
+ const char *line_size_prop;
+ const char *nr_sets_prop;
+};
+
+/* PowerPC Processor binding says the [di]-cache-* must be equal on
+ * unified caches, so just use d-cache properties. */
+static struct cache_desc_info ucache_info = {
+ .type = "Unified",
+ .size_prop = "d-cache-size",
+ .line_size_prop = "d-cache-line-size",
+ .nr_sets_prop = "d-cache-sets",
+};
-static void register_cpu_online(unsigned int cpu)
+static struct cache_desc_info dcache_info = {
+ .type = "Data",
+ .size_prop = "d-cache-size",
+ .line_size_prop = "d-cache-line-size",
+ .nr_sets_prop = "d-cache-sets",
+};
+
+static struct cache_desc_info icache_info = {
+ .type = "Instruction",
+ .size_prop = "i-cache-size",
+ .line_size_prop = "i-cache-line-size",
+ .nr_sets_prop = "i-cache-sets",
+};
+
+static struct cache_desc * __cpuinit create_cache_desc(struct device_node *np, struct kobject *parent, int index, int level, struct cache_desc_info *info)
+{
+ const u32 *cache_line_size;
+ struct cache_desc *new;
+ const u32 *cache_size;
+ const u32 *nr_sets;
+ int rc;
+
+ new = kzalloc(sizeof(*new), GFP_KERNEL);
+ if (!new)
+ return NULL;
+
+ rc = kobject_init_and_add(&new->kobj, &cache_desc_type, parent,
+ "index%d", index);
+ if (rc)
+ goto err;
+
+ /* type */
+ new->type = info->type;
+ rc = sysfs_create_file(&new->kobj, &cache_type_attr.attr);
+ WARN_ON(rc);
+
+ /* level */
+ new->level = level;
+ rc = sysfs_create_file(&new->kobj, &cache_level_attr.attr);
+ WARN_ON(rc);
+
+ /* size */
+ cache_size = of_get_property(np, info->size_prop, NULL);
+ if (cache_size) {
+ new->size = *cache_size / 1024;
+ rc = sysfs_create_file(&new->kobj,
+ &cache_size_attr.attr);
+ WARN_ON(rc);
+ }
+
+ /* coherency_line_size */
+ cache_line_size = of_get_property(np, info->line_size_prop, NULL);
+ if (cache_line_size) {
+ new->line_size = *cache_line_size;
+ rc = sysfs_create_file(&new->kobj,
+ &cache_line_size_attr.attr);
+ WARN_ON(rc);
+ }
+
+ /* number_of_sets */
+ nr_sets = of_get_property(np, info->nr_sets_prop, NULL);
+ if (nr_sets) {
+ new->nr_sets = *nr_sets;
+ rc = sysfs_create_file(&new->kobj,
+ &cache_nr_sets_attr.attr);
+ WARN_ON(rc);
+ }
+
+ /* ways_of_associativity */
+ if (new->nr_sets == 1) {
+ /* fully associative */
+ new->associativity = 0;
+ goto create_assoc;
+ }
+
+ if (new->nr_sets && new->size && new->line_size) {
+ /* If we have values for all of these we can derive
+ * the associativity. */
+ new->associativity =
+ ((new->size * 1024) / new->nr_sets) / new->line_size;
+create_assoc:
+ rc = sysfs_create_file(&new->kobj,
+ &cache_assoc_attr.attr);
+ WARN_ON(rc);
+ }
+
+ return new;
+err:
+ kfree(new);
+ return NULL;
+}
+
+static bool cache_is_unified(struct device_node *np)
+{
+ return of_get_property(np, "cache-unified", NULL);
+}
+
+static struct cache_desc * __cpuinit create_cache_index_info(struct device_node *np, struct kobject *parent, int index, int level)
+{
+ const phandle *next_cache_phandle;
+ struct device_node *next_cache;
+ struct cache_desc *new, **end;
+
+ pr_debug("%s(node = %s, index = %d)\n", __func__, np->full_name, index);
+
+ if (cache_is_unified(np)) {
+ new = create_cache_desc(np, parent, index, level,
+ &ucache_info);
+ } else {
+ new = create_cache_desc(np, parent, index, level,
+ &dcache_info);
+ if (new) {
+ index++;
+ new->next = create_cache_desc(np, parent, index, level,
+ &icache_info);
+ }
+ }
+ if (!new)
+ return NULL;
+
+ end = &new->next;
+ while (*end)
+ end = &(*end)->next;
+
+ next_cache_phandle = of_get_property(np, "l2-cache", NULL);
+ if (!next_cache_phandle)
+ goto out;
+
+ next_cache = of_find_node_by_phandle(*next_cache_phandle);
+ if (!next_cache)
+ goto out;
+
+ *end = create_cache_index_info(next_cache, parent, ++index, ++level);
+
+ of_node_put(next_cache);
+out:
+ return new;
+}
+
+static void __cpuinit create_cache_info(struct sys_device *sysdev)
+{
+ struct kobject *cache_toplevel;
+ struct device_node *np = NULL;
+ int cpu = sysdev->id;
+
+ cache_toplevel = kobject_create_and_add("cache", &sysdev->kobj);
+ if (!cache_toplevel)
+ return;
+ per_cpu(cache_toplevel, cpu) = cache_toplevel;
+ np = of_get_cpu_node(cpu, NULL);
+ if (np != NULL) {
+ per_cpu(cache_desc, cpu) =
+ create_cache_index_info(np, cache_toplevel, 0, 1);
+ of_node_put(np);
+ }
+ return;
+}
+
+static void __cpuinit register_cpu_online(unsigned int cpu)
{
struct cpu *c = &per_cpu(cpu_devices, cpu);
struct sys_device *s = &c->sysdev;
@@ -346,9 +629,33 @@ static void register_cpu_online(unsigned int cpu)
if (cpu_has_feature(CPU_FTR_DSCR))
sysdev_create_file(s, &attr_dscr);
+
+ create_cache_info(s);
}
#ifdef CONFIG_HOTPLUG_CPU
+static void remove_cache_info(struct sys_device *sysdev)
+{
+ struct kobject *cache_toplevel;
+ struct cache_desc *cache_desc;
+ int cpu = sysdev->id;
+
+ cache_desc = per_cpu(cache_desc, cpu);
+ if (cache_desc != NULL) {
+ sysfs_remove_file(&cache_desc->kobj, &cache_size_attr.attr);
+ sysfs_remove_file(&cache_desc->kobj, &cache_line_size_attr.attr);
+ sysfs_remove_file(&cache_desc->kobj, &cache_type_attr.attr);
+ sysfs_remove_file(&cache_desc->kobj, &cache_level_attr.attr);
+ sysfs_remove_file(&cache_desc->kobj, &cache_nr_sets_attr.attr);
+ sysfs_remove_file(&cache_desc->kobj, &cache_assoc_attr.attr);
+
+ kobject_put(&cache_desc->kobj);
+ }
+ cache_toplevel = per_cpu(cache_toplevel, cpu);
+ if (cache_toplevel != NULL)
+ kobject_put(cache_toplevel);
+}
+
static void unregister_cpu_online(unsigned int cpu)
{
struct cpu *c = &per_cpu(cpu_devices, cpu);
@@ -399,6 +706,8 @@ static void unregister_cpu_online(unsigned int cpu)
if (cpu_has_feature(CPU_FTR_DSCR))
sysdev_remove_file(s, &attr_dscr);
+
+ remove_cache_info(s);
}
#endif /* CONFIG_HOTPLUG_CPU */
diff --git a/arch/powerpc/kernel/vio.c b/arch/powerpc/kernel/vio.c
index ade8aeaa2e70..22a3c33fd751 100644
--- a/arch/powerpc/kernel/vio.c
+++ b/arch/powerpc/kernel/vio.c
@@ -530,7 +530,7 @@ static dma_addr_t vio_dma_iommu_map_single(struct device *dev, void *vaddr,
}
ret = dma_iommu_ops.map_single(dev, vaddr, size, direction, attrs);
- if (unlikely(dma_mapping_error(ret))) {
+ if (unlikely(dma_mapping_error(dev, ret))) {
vio_cmo_dealloc(viodev, roundup(size, IOMMU_PAGE_SIZE));
atomic_inc(&viodev->cmo.allocs_failed);
}
@@ -1031,8 +1031,8 @@ void vio_cmo_set_dev_desired(struct vio_dev *viodev, size_t desired) {}
static int vio_cmo_bus_probe(struct vio_dev *viodev) { return 0; }
static void vio_cmo_bus_remove(struct vio_dev *viodev) {}
static void vio_cmo_set_dma_ops(struct vio_dev *viodev) {}
-static void vio_cmo_bus_init() {}
-static void vio_cmo_sysfs_init() { }
+static void vio_cmo_bus_init(void) {}
+static void vio_cmo_sysfs_init(void) { }
#endif /* CONFIG_PPC_SMLPAR */
EXPORT_SYMBOL(vio_cmo_entitlement_update);
EXPORT_SYMBOL(vio_cmo_set_dev_desired);
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-13 02:22:16 +0000