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-rw-r--r--arch/mips/kernel/cevt-bcm1480.c2
-rw-r--r--arch/mips/kernel/cevt-ds1287.c2
-rw-r--r--arch/mips/kernel/cevt-gt641xx.c2
-rw-r--r--arch/mips/kernel/cevt-r4k.c2
-rw-r--r--arch/mips/kernel/cevt-sb1250.c2
-rw-r--r--arch/mips/kernel/cevt-smtc.c3
-rw-r--r--arch/mips/kernel/cevt-txx9.c2
-rw-r--r--arch/mips/kernel/cpu-probe.c8
-rw-r--r--arch/mips/kernel/head.S1
-rw-r--r--arch/mips/kernel/i8253.c2
-rw-r--r--arch/mips/kernel/irq-gic.c114
-rw-r--r--arch/mips/kernel/kspd.c33
-rw-r--r--arch/mips/kernel/linux32.c6
-rw-r--r--arch/mips/kernel/rtlx.c15
-rw-r--r--arch/mips/kernel/scall64-o32.S4
-rw-r--r--arch/mips/kernel/smp.c14
-rw-r--r--arch/mips/kernel/smtc.c39
-rw-r--r--arch/mips/kernel/spram.c5
-rw-r--r--arch/mips/kernel/syscall.c4
-rw-r--r--arch/mips/kernel/vpe.c77
20 files changed, 172 insertions, 165 deletions
diff --git a/arch/mips/kernel/cevt-bcm1480.c b/arch/mips/kernel/cevt-bcm1480.c
index e02f79b1eb5..bfea327c636 100644
--- a/arch/mips/kernel/cevt-bcm1480.c
+++ b/arch/mips/kernel/cevt-bcm1480.c
@@ -144,7 +144,7 @@ void __cpuinit sb1480_clockevent_init(void)
bcm1480_unmask_irq(cpu, irq);
action->handler = sibyte_counter_handler;
- action->flags = IRQF_DISABLED | IRQF_PERCPU;
+ action->flags = IRQF_DISABLED | IRQF_PERCPU | IRQF_TIMER;
action->name = name;
action->dev_id = cd;
diff --git a/arch/mips/kernel/cevt-ds1287.c b/arch/mips/kernel/cevt-ds1287.c
index 6996da4d74a..00a4da277cb 100644
--- a/arch/mips/kernel/cevt-ds1287.c
+++ b/arch/mips/kernel/cevt-ds1287.c
@@ -107,7 +107,7 @@ static irqreturn_t ds1287_interrupt(int irq, void *dev_id)
static struct irqaction ds1287_irqaction = {
.handler = ds1287_interrupt,
- .flags = IRQF_DISABLED | IRQF_PERCPU,
+ .flags = IRQF_DISABLED | IRQF_PERCPU | IRQF_TIMER,
.name = "ds1287",
};
diff --git a/arch/mips/kernel/cevt-gt641xx.c b/arch/mips/kernel/cevt-gt641xx.c
index 92351e00ae0..f5d265eb6ea 100644
--- a/arch/mips/kernel/cevt-gt641xx.c
+++ b/arch/mips/kernel/cevt-gt641xx.c
@@ -113,7 +113,7 @@ static irqreturn_t gt641xx_timer0_interrupt(int irq, void *dev_id)
static struct irqaction gt641xx_timer0_irqaction = {
.handler = gt641xx_timer0_interrupt,
- .flags = IRQF_DISABLED | IRQF_PERCPU,
+ .flags = IRQF_DISABLED | IRQF_PERCPU | IRQF_TIMER,
.name = "gt641xx_timer0",
};
diff --git a/arch/mips/kernel/cevt-r4k.c b/arch/mips/kernel/cevt-r4k.c
index 2652362ce04..b469ad05d52 100644
--- a/arch/mips/kernel/cevt-r4k.c
+++ b/arch/mips/kernel/cevt-r4k.c
@@ -83,7 +83,7 @@ out:
struct irqaction c0_compare_irqaction = {
.handler = c0_compare_interrupt,
- .flags = IRQF_DISABLED | IRQF_PERCPU,
+ .flags = IRQF_DISABLED | IRQF_PERCPU | IRQF_TIMER,
.name = "timer",
};
diff --git a/arch/mips/kernel/cevt-sb1250.c b/arch/mips/kernel/cevt-sb1250.c
index ac5903d1b20..da78eeaea6e 100644
--- a/arch/mips/kernel/cevt-sb1250.c
+++ b/arch/mips/kernel/cevt-sb1250.c
@@ -143,7 +143,7 @@ void __cpuinit sb1250_clockevent_init(void)
sb1250_unmask_irq(cpu, irq);
action->handler = sibyte_counter_handler;
- action->flags = IRQF_DISABLED | IRQF_PERCPU;
+ action->flags = IRQF_DISABLED | IRQF_PERCPU | IRQF_TIMER;
action->name = name;
action->dev_id = cd;
diff --git a/arch/mips/kernel/cevt-smtc.c b/arch/mips/kernel/cevt-smtc.c
index 98bd7de7577..b102e4f1630 100644
--- a/arch/mips/kernel/cevt-smtc.c
+++ b/arch/mips/kernel/cevt-smtc.c
@@ -173,11 +173,12 @@ void smtc_distribute_timer(int vpe)
unsigned int mtflags;
int cpu;
struct clock_event_device *cd;
- unsigned long nextstamp = 0L;
+ unsigned long nextstamp;
unsigned long reference;
repeat:
+ nextstamp = 0L;
for_each_online_cpu(cpu) {
/*
* Find virtual CPUs within the current VPE who have
diff --git a/arch/mips/kernel/cevt-txx9.c b/arch/mips/kernel/cevt-txx9.c
index 0037f21baf0..218ee6bda93 100644
--- a/arch/mips/kernel/cevt-txx9.c
+++ b/arch/mips/kernel/cevt-txx9.c
@@ -146,7 +146,7 @@ static irqreturn_t txx9tmr_interrupt(int irq, void *dev_id)
static struct irqaction txx9tmr_irq = {
.handler = txx9tmr_interrupt,
- .flags = IRQF_DISABLED | IRQF_PERCPU,
+ .flags = IRQF_DISABLED | IRQF_PERCPU | IRQF_TIMER,
.name = "txx9tmr",
.dev_id = &txx9_clock_event_device,
};
diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c
index f709657e4dc..7a51866068a 100644
--- a/arch/mips/kernel/cpu-probe.c
+++ b/arch/mips/kernel/cpu-probe.c
@@ -23,7 +23,7 @@
#include <asm/mipsregs.h>
#include <asm/system.h>
#include <asm/watch.h>
-
+#include <asm/spram.h>
/*
* Not all of the MIPS CPUs have the "wait" instruction available. Moreover,
* the implementation of the "wait" feature differs between CPU families. This
@@ -711,12 +711,6 @@ static void __cpuinit decode_configs(struct cpuinfo_mips *c)
mips_probe_watch_registers(c);
}
-#ifdef CONFIG_CPU_MIPSR2
-extern void spram_config(void);
-#else
-static inline void spram_config(void) {}
-#endif
-
static inline void cpu_probe_mips(struct cpuinfo_mips *c, unsigned int cpu)
{
decode_configs(c);
diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
index 531ce7b1612..ea695d9605e 100644
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -191,6 +191,7 @@ NESTED(kernel_entry, 16, sp) # kernel entry point
/* Set the SP after an empty pt_regs. */
PTR_LI sp, _THREAD_SIZE - 32 - PT_SIZE
PTR_ADDU sp, $28
+ back_to_back_c0_hazard
set_saved_sp sp, t0, t1
PTR_SUBU sp, 4 * SZREG # init stack pointer
diff --git a/arch/mips/kernel/i8253.c b/arch/mips/kernel/i8253.c
index f7d8d5d0ddb..ed5c441615e 100644
--- a/arch/mips/kernel/i8253.c
+++ b/arch/mips/kernel/i8253.c
@@ -98,7 +98,7 @@ static irqreturn_t timer_interrupt(int irq, void *dev_id)
static struct irqaction irq0 = {
.handler = timer_interrupt,
- .flags = IRQF_DISABLED | IRQF_NOBALANCING,
+ .flags = IRQF_DISABLED | IRQF_NOBALANCING | IRQF_TIMER,
.name = "timer"
};
diff --git a/arch/mips/kernel/irq-gic.c b/arch/mips/kernel/irq-gic.c
index d2072cd3859..b181f2f0ea8 100644
--- a/arch/mips/kernel/irq-gic.c
+++ b/arch/mips/kernel/irq-gic.c
@@ -14,38 +14,23 @@
static unsigned long _gic_base;
-static unsigned int _irqbase, _mapsize, numvpes, numintrs;
-static struct gic_intr_map *_intrmap;
+static unsigned int _irqbase;
+static unsigned int gic_irq_flags[GIC_NUM_INTRS];
+#define GIC_IRQ_FLAG_EDGE 0x0001
-static struct gic_pcpu_mask pcpu_masks[NR_CPUS];
+struct gic_pcpu_mask pcpu_masks[NR_CPUS];
static struct gic_pending_regs pending_regs[NR_CPUS];
static struct gic_intrmask_regs intrmask_regs[NR_CPUS];
-#define gic_wedgeb2bok 0 /*
- * Can GIC handle b2b writes to wedge register?
- */
-#if gic_wedgeb2bok == 0
-static DEFINE_SPINLOCK(gic_wedgeb2b_lock);
-#endif
-
void gic_send_ipi(unsigned int intr)
{
-#if gic_wedgeb2bok == 0
- unsigned long flags;
-#endif
pr_debug("CPU%d: %s status %08x\n", smp_processor_id(), __func__,
read_c0_status());
- if (!gic_wedgeb2bok)
- spin_lock_irqsave(&gic_wedgeb2b_lock, flags);
GICWRITE(GIC_REG(SHARED, GIC_SH_WEDGE), 0x80000000 | intr);
- if (!gic_wedgeb2bok) {
- (void) GIC_REG(SHARED, GIC_SH_CONFIG);
- spin_unlock_irqrestore(&gic_wedgeb2b_lock, flags);
- }
}
/* This is Malta specific and needs to be exported */
-static void vpe_local_setup(unsigned int numvpes)
+static void __init vpe_local_setup(unsigned int numvpes)
{
int i;
unsigned long timer_interrupt = 5, perf_interrupt = 5;
@@ -105,44 +90,34 @@ unsigned int gic_get_int(void)
static unsigned int gic_irq_startup(unsigned int irq)
{
- pr_debug("CPU%d: %s: irq%d\n", smp_processor_id(), __func__, irq);
irq -= _irqbase;
- GIC_SET_INTR_MASK(irq, 1);
+ pr_debug("CPU%d: %s: irq%d\n", smp_processor_id(), __func__, irq);
+ GIC_SET_INTR_MASK(irq);
return 0;
}
static void gic_irq_ack(unsigned int irq)
{
-#if gic_wedgeb2bok == 0
- unsigned long flags;
-#endif
- pr_debug("CPU%d: %s: irq%d\n", smp_processor_id(), __func__, irq);
irq -= _irqbase;
- GIC_CLR_INTR_MASK(irq, 1);
+ pr_debug("CPU%d: %s: irq%d\n", smp_processor_id(), __func__, irq);
+ GIC_CLR_INTR_MASK(irq);
- if (_intrmap[irq].trigtype == GIC_TRIG_EDGE) {
- if (!gic_wedgeb2bok)
- spin_lock_irqsave(&gic_wedgeb2b_lock, flags);
+ if (gic_irq_flags[irq] & GIC_IRQ_FLAG_EDGE)
GICWRITE(GIC_REG(SHARED, GIC_SH_WEDGE), irq);
- if (!gic_wedgeb2bok) {
- (void) GIC_REG(SHARED, GIC_SH_CONFIG);
- spin_unlock_irqrestore(&gic_wedgeb2b_lock, flags);
- }
- }
}
static void gic_mask_irq(unsigned int irq)
{
- pr_debug("CPU%d: %s: irq%d\n", smp_processor_id(), __func__, irq);
irq -= _irqbase;
- GIC_CLR_INTR_MASK(irq, 1);
+ pr_debug("CPU%d: %s: irq%d\n", smp_processor_id(), __func__, irq);
+ GIC_CLR_INTR_MASK(irq);
}
static void gic_unmask_irq(unsigned int irq)
{
- pr_debug("CPU%d: %s: irq%d\n", smp_processor_id(), __func__, irq);
irq -= _irqbase;
- GIC_SET_INTR_MASK(irq, 1);
+ pr_debug("CPU%d: %s: irq%d\n", smp_processor_id(), __func__, irq);
+ GIC_SET_INTR_MASK(irq);
}
#ifdef CONFIG_SMP
@@ -155,9 +130,8 @@ static int gic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
unsigned long flags;
int i;
- pr_debug(KERN_DEBUG "%s called\n", __func__);
irq -= _irqbase;
-
+ pr_debug(KERN_DEBUG "%s(%d) called\n", __func__, irq);
cpumask_and(&tmp, cpumask, cpu_online_mask);
if (cpus_empty(tmp))
return -1;
@@ -168,13 +142,6 @@ static int gic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
/* Re-route this IRQ */
GIC_SH_MAP_TO_VPE_SMASK(irq, first_cpu(tmp));
- /*
- * FIXME: assumption that _intrmap is ordered and has no holes
- */
-
- /* Update the intr_map */
- _intrmap[irq].cpunum = first_cpu(tmp);
-
/* Update the pcpu_masks */
for (i = 0; i < NR_CPUS; i++)
clear_bit(irq, pcpu_masks[i].pcpu_mask);
@@ -201,8 +168,9 @@ static struct irq_chip gic_irq_controller = {
#endif
};
-static void __init setup_intr(unsigned int intr, unsigned int cpu,
- unsigned int pin, unsigned int polarity, unsigned int trigtype)
+static void __init gic_setup_intr(unsigned int intr, unsigned int cpu,
+ unsigned int pin, unsigned int polarity, unsigned int trigtype,
+ unsigned int flags)
{
/* Setup Intr to Pin mapping */
if (pin & GIC_MAP_TO_NMI_MSK) {
@@ -227,38 +195,43 @@ static void __init setup_intr(unsigned int intr, unsigned int cpu,
GIC_SET_TRIGGER(intr, trigtype);
/* Init Intr Masks */
- GIC_SET_INTR_MASK(intr, 0);
+ GIC_CLR_INTR_MASK(intr);
+ /* Initialise per-cpu Interrupt software masks */
+ if (flags & GIC_FLAG_IPI)
+ set_bit(intr, pcpu_masks[cpu].pcpu_mask);
+ if (flags & GIC_FLAG_TRANSPARENT)
+ GIC_SET_INTR_MASK(intr);
+ if (trigtype == GIC_TRIG_EDGE)
+ gic_irq_flags[intr] |= GIC_IRQ_FLAG_EDGE;
}
-static void __init gic_basic_init(void)
+static void __init gic_basic_init(int numintrs, int numvpes,
+ struct gic_intr_map *intrmap, int mapsize)
{
unsigned int i, cpu;
/* Setup defaults */
- for (i = 0; i < GIC_NUM_INTRS; i++) {
+ for (i = 0; i < numintrs; i++) {
GIC_SET_POLARITY(i, GIC_POL_POS);
GIC_SET_TRIGGER(i, GIC_TRIG_LEVEL);
- GIC_SET_INTR_MASK(i, 0);
+ GIC_CLR_INTR_MASK(i);
+ if (i < GIC_NUM_INTRS)
+ gic_irq_flags[i] = 0;
}
/* Setup specifics */
- for (i = 0; i < _mapsize; i++) {
- cpu = _intrmap[i].cpunum;
+ for (i = 0; i < mapsize; i++) {
+ cpu = intrmap[i].cpunum;
if (cpu == X)
continue;
-
- if (cpu == 0 && i != 0 && _intrmap[i].intrnum == 0 &&
- _intrmap[i].ipiflag == 0)
+ if (cpu == 0 && i != 0 && intrmap[i].flags == 0)
continue;
-
- setup_intr(_intrmap[i].intrnum,
- _intrmap[i].cpunum,
- _intrmap[i].pin,
- _intrmap[i].polarity,
- _intrmap[i].trigtype);
- /* Initialise per-cpu Interrupt software masks */
- if (_intrmap[i].ipiflag)
- set_bit(_intrmap[i].intrnum, pcpu_masks[cpu].pcpu_mask);
+ gic_setup_intr(i,
+ intrmap[i].cpunum,
+ intrmap[i].pin,
+ intrmap[i].polarity,
+ intrmap[i].trigtype,
+ intrmap[i].flags);
}
vpe_local_setup(numvpes);
@@ -273,12 +246,11 @@ void __init gic_init(unsigned long gic_base_addr,
unsigned int irqbase)
{
unsigned int gicconfig;
+ int numvpes, numintrs;
_gic_base = (unsigned long) ioremap_nocache(gic_base_addr,
gic_addrspace_size);
_irqbase = irqbase;
- _intrmap = intr_map;
- _mapsize = intr_map_size;
GICREAD(GIC_REG(SHARED, GIC_SH_CONFIG), gicconfig);
numintrs = (gicconfig & GIC_SH_CONFIG_NUMINTRS_MSK) >>
@@ -290,5 +262,5 @@ void __init gic_init(unsigned long gic_base_addr,
pr_debug("%s called\n", __func__);
- gic_basic_init();
+ gic_basic_init(numintrs, numvpes, intr_map, intr_map_size);
}
diff --git a/arch/mips/kernel/kspd.c b/arch/mips/kernel/kspd.c
index f2397f00db4..ad4e017ed2f 100644
--- a/arch/mips/kernel/kspd.c
+++ b/arch/mips/kernel/kspd.c
@@ -172,13 +172,20 @@ static unsigned int translate_open_flags(int flags)
}
-static void sp_setfsuidgid( uid_t uid, gid_t gid)
+static int sp_setfsuidgid(uid_t uid, gid_t gid)
{
- current->cred->fsuid = uid;
- current->cred->fsgid = gid;
+ struct cred *new;
- key_fsuid_changed(current);
- key_fsgid_changed(current);
+ new = prepare_creds();
+ if (!new)
+ return -ENOMEM;
+
+ new->fsuid = uid;
+ new->fsgid = gid;
+
+ commit_creds(new);
+
+ return 0;
}
/*
@@ -196,7 +203,7 @@ void sp_work_handle_request(void)
mm_segment_t old_fs;
struct timeval tv;
struct timezone tz;
- int cmd;
+ int err, cmd;
char *vcwd;
int size;
@@ -225,8 +232,11 @@ void sp_work_handle_request(void)
/* Run the syscall at the privilege of the user who loaded the
SP program */
- if (vpe_getuid(tclimit))
- sp_setfsuidgid(vpe_getuid(tclimit), vpe_getgid(tclimit));
+ if (vpe_getuid(tclimit)) {
+ err = sp_setfsuidgid(vpe_getuid(tclimit), vpe_getgid(tclimit));
+ if (!err)
+ pr_err("Change of creds failed\n");
+ }
switch (sc.cmd) {
/* needs the flags argument translating from SDE kit to
@@ -283,8 +293,11 @@ void sp_work_handle_request(void)
break;
} /* switch */
- if (vpe_getuid(tclimit))
- sp_setfsuidgid( 0, 0);
+ if (vpe_getuid(tclimit)) {
+ err = sp_setfsuidgid(0, 0);
+ if (!err)
+ pr_err("restoring old creds failed\n");
+ }
old_fs = get_fs();
set_fs(KERNEL_DS);
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index 6242bc68add..b77fefaff9d 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -428,3 +428,9 @@ _sys32_clone(nabi_no_regargs struct pt_regs regs)
return do_fork(clone_flags, newsp, &regs, 0,
parent_tidptr, child_tidptr);
}
+
+asmlinkage long sys32_lookup_dcookie(u32 a0, u32 a1, char __user *buf,
+ size_t len)
+{
+ return sys_lookup_dcookie(merge_64(a0, a1), buf, len);
+}
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index a10ebfdc28a..364f066cb49 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -72,8 +72,9 @@ static void rtlx_dispatch(void)
*/
static irqreturn_t rtlx_interrupt(int irq, void *dev_id)
{
+ unsigned int vpeflags;
+ unsigned long flags;
int i;
- unsigned int flags, vpeflags;
/* Ought not to be strictly necessary for SMTC builds */
local_irq_save(flags);
@@ -392,20 +393,12 @@ out:
static int file_open(struct inode *inode, struct file *filp)
{
- int minor = iminor(inode);
- int err;
-
- lock_kernel();
- err = rtlx_open(minor, (filp->f_flags & O_NONBLOCK) ? 0 : 1);
- unlock_kernel();
- return err;
+ return rtlx_open(iminor(inode), (filp->f_flags & O_NONBLOCK) ? 0 : 1);
}
static int file_release(struct inode *inode, struct file *filp)
{
- int minor = iminor(inode);
-
- return rtlx_release(minor);
+ return rtlx_release(iminor(inode));
}
static unsigned int file_poll(struct file *file, poll_table * wait)
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 9bbf9775e0b..14dde4ca932 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -450,7 +450,7 @@ sys_call_table:
PTR sys_io_submit
PTR sys_io_cancel /* 4245 */
PTR sys_exit_group
- PTR sys_lookup_dcookie
+ PTR sys32_lookup_dcookie
PTR sys_epoll_create
PTR sys_epoll_ctl
PTR sys_epoll_wait /* 4250 */
@@ -505,7 +505,7 @@ sys_call_table:
PTR sys_fchmodat
PTR sys_faccessat /* 4300 */
PTR compat_sys_pselect6
- PTR sys_ppoll
+ PTR compat_sys_ppoll
PTR sys_unshare
PTR sys_splice
PTR sys32_sync_file_range /* 4305 */
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 4eb106c6a3e..e72e6844d13 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -32,7 +32,6 @@
#include <linux/cpumask.h>
#include <linux/cpu.h>
#include <linux/err.h>
-#include <linux/smp.h>
#include <asm/atomic.h>
#include <asm/cpu.h>
@@ -128,19 +127,6 @@ asmlinkage __cpuinit void start_secondary(void)
cpu_idle();
}
-void arch_send_call_function_ipi_mask(const struct cpumask *mask)
-{
- mp_ops->send_ipi_mask(mask, SMP_CALL_FUNCTION);
-}
-
-/*
- * We reuse the same vector for the single IPI
- */
-void arch_send_call_function_single_ipi(int cpu)
-{
- mp_ops->send_ipi_mask(cpumask_of_cpu(cpu), SMP_CALL_FUNCTION);
-}
-
/*
* Call into both interrupt handlers, as we share the IPI for them
*/
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c
index 67153a0dc26..24630fd8ef6 100644
--- a/arch/mips/kernel/smtc.c
+++ b/arch/mips/kernel/smtc.c
@@ -75,7 +75,6 @@ unsigned long irq_hwmask[NR_IRQS];
asiduse smtc_live_asid[MAX_SMTC_TLBS][MAX_SMTC_ASIDS];
-
/*
* Number of InterProcessor Interrupt (IPI) message buffers to allocate
*/
@@ -388,6 +387,7 @@ void smtc_prepare_cpus(int cpus)
IPIQ[i].head = IPIQ[i].tail = NULL;
spin_lock_init(&IPIQ[i].lock);
IPIQ[i].depth = 0;
+ IPIQ[i].resched_flag = 0; /* No reschedules queued initially */
}
/* cpu_data index starts at zero */
@@ -741,11 +741,24 @@ void smtc_forward_irq(unsigned int irq)
static void smtc_ipi_qdump(void)
{
int i;
+ struct smtc_ipi *temp;
for (i = 0; i < NR_CPUS ;i++) {
- printk("IPIQ[%d]: head = 0x%x, tail = 0x%x, depth = %d\n",
+ pr_info("IPIQ[%d]: head = 0x%x, tail = 0x%x, depth = %d\n",
i, (unsigned)IPIQ[i].head, (unsigned)IPIQ[i].tail,
IPIQ[i].depth);
+ temp = IPIQ[i].head;
+
+ while (temp != IPIQ[i].tail) {
+ pr_debug("%d %d %d: ", temp->type, temp->dest,
+ (int)temp->arg);
+#ifdef SMTC_IPI_DEBUG
+ pr_debug("%u %lu\n", temp->sender, temp->stamp);
+#else
+ pr_debug("\n");
+#endif
+ temp = temp->flink;
+ }
}
}
@@ -784,11 +797,16 @@ void smtc_send_ipi(int cpu, int type, unsigned int action)
int mtflags;
unsigned long tcrestart;
extern void r4k_wait_irqoff(void), __pastwait(void);
+ int set_resched_flag = (type == LINUX_SMP_IPI &&
+ action == SMP_RESCHEDULE_YOURSELF);
if (cpu == smp_processor_id()) {
printk("Cannot Send IPI to self!\n");
return;
}
+ if (set_resched_flag && IPIQ[cpu].resched_flag != 0)
+ return; /* There is a reschedule queued already */
+
/* Set up a descriptor, to be delivered either promptly or queued */
pipi = smtc_ipi_dq(&freeIPIq);
if (pipi == NULL) {
@@ -801,6 +819,7 @@ void smtc_send_ipi(int cpu, int type, unsigned int action)
pipi->dest = cpu;
if (cpu_data[cpu].vpe_id != cpu_data[smp_processor_id()].vpe_id) {
/* If not on same VPE, enqueue and send cross-VPE interrupt */
+ IPIQ[cpu].resched_flag |= set_resched_flag;
smtc_ipi_nq(&IPIQ[cpu], pipi);
LOCK_CORE_PRA();
settc(cpu_data[cpu].tc_id);
@@ -847,6 +866,7 @@ void smtc_send_ipi(int cpu, int type, unsigned int action)
*/
write_tc_c0_tchalt(0);
UNLOCK_CORE_PRA();
+ IPIQ[cpu].resched_flag |= set_resched_flag;
smtc_ipi_nq(&IPIQ[cpu], pipi);
} else {
postdirect:
@@ -996,12 +1016,15 @@ void deferred_smtc_ipi(void)
* already enabled.
*/
local_irq_save(flags);
-
spin_lock(&q->lock);
pipi = __smtc_ipi_dq(q);
spin_unlock(&q->lock);
- if (pipi != NULL)
+ if (pipi != NULL) {
+ if (pipi->type == LINUX_SMP_IPI &&
+ (int)pipi->arg == SMP_RESCHEDULE_YOURSELF)
+ IPIQ[cpu].resched_flag = 0;
ipi_decode(pipi);
+ }
/*
* The use of the __raw_local restore isn't
* as obviously necessary here as in smtc_ipi_replay(),
@@ -1082,6 +1105,9 @@ static irqreturn_t ipi_interrupt(int irq, void *dev_idm)
* with interrupts off
*/
local_irq_save(flags);
+ if (pipi->type == LINUX_SMP_IPI &&
+ (int)pipi->arg == SMP_RESCHEDULE_YOURSELF)
+ IPIQ[cpu].resched_flag = 0;
ipi_decode(pipi);
local_irq_restore(flags);
}
@@ -1098,9 +1124,8 @@ static void ipi_irq_dispatch(void)
static struct irqaction irq_ipi = {
.handler = ipi_interrupt,
- .flags = IRQF_DISABLED,
- .name = "SMTC_IPI",
- .flags = IRQF_PERCPU
+ .flags = IRQF_DISABLED | IRQF_PERCPU,
+ .name = "SMTC_IPI"
};
static void setup_cross_vpe_interrupts(unsigned int nvpe)
diff --git a/arch/mips/kernel/spram.c b/arch/mips/kernel/spram.c
index 6ddb507a87e..1821d12a641 100644
--- a/arch/mips/kernel/spram.c
+++ b/arch/mips/kernel/spram.c
@@ -13,7 +13,6 @@
#include <linux/ptrace.h>
#include <linux/stddef.h>
-#include <asm/cpu.h>
#include <asm/fpu.h>
#include <asm/mipsregs.h>
#include <asm/system.h>
@@ -198,8 +197,7 @@ static __cpuinit void probe_spram(char *type,
offset += 2 * SPRAM_TAG_STRIDE;
}
}
-
-__cpuinit void spram_config(void)
+void __cpuinit spram_config(void)
{
struct cpuinfo_mips *c = &current_cpu_data;
unsigned int config0;
@@ -208,6 +206,7 @@ __cpuinit void spram_config(void)
case CPU_24K:
case CPU_34K:
case CPU_74K:
+ case CPU_1004K:
config0 = read_c0_config();
/* FIXME: addresses are Malta specific */
if (config0 & (1<<24)) {
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 3fe1fcfa2e7..fe0d7980560 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -306,6 +306,7 @@ static inline int mips_atomic_set(struct pt_regs *regs,
if (cpu_has_llsc && R10000_LLSC_WAR) {
__asm__ __volatile__ (
+ " .set mips3 \n"
" li %[err], 0 \n"
"1: ll %[old], (%[addr]) \n"
" move %[tmp], %[new] \n"
@@ -320,6 +321,7 @@ static inline int mips_atomic_set(struct pt_regs *regs,
" "STR(PTR)" 1b, 4b \n"
" "STR(PTR)" 2b, 4b \n"
" .previous \n"
+ " .set mips0 \n"
: [old] "=&r" (old),
[err] "=&r" (err),
[tmp] "=&r" (tmp)
@@ -329,6 +331,7 @@ static inline int mips_atomic_set(struct pt_regs *regs,
: "memory");
} else if (cpu_has_llsc) {
__asm__ __volatile__ (
+ " .set mips3 \n"
" li %[err], 0 \n"
"1: ll %[old], (%[addr]) \n"
" move %[tmp], %[new] \n"
@@ -347,6 +350,7 @@ static inline int mips_atomic_set(struct pt_regs *regs,
" "STR(PTR)" 1b, 5b \n"
" "STR(PTR)" 2b, 5b \n"
" .previous \n"
+ " .set mips0 \n"
: [old] "=&r" (old),
[err] "=&r" (err),
[tmp] "=&r" (tmp)
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index eb6c4c5b7fb..60477529362 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -144,14 +144,15 @@ struct tc {
};
struct {
- /* Virtual processing elements */
- struct list_head vpe_list;
-
- /* Thread contexts */
- struct list_head tc_list;
+ spinlock_t vpe_list_lock;
+ struct list_head vpe_list; /* Virtual processing elements */
+ spinlock_t tc_list_lock;
+ struct list_head tc_list; /* Thread contexts */
} vpecontrol = {
- .vpe_list = LIST_HEAD_INIT(vpecontrol.vpe_list),
- .tc_list = LIST_HEAD_INIT(vpecontrol.tc_list)
+ .vpe_list_lock = SPIN_LOCK_UNLOCKED,
+ .vpe_list = LIST_HEAD_INIT(vpecontrol.vpe_list),
+ .tc_list_lock = SPIN_LOCK_UNLOCKED,
+ .tc_list = LIST_HEAD_INIT(vpecontrol.tc_list)
};
static void release_progmem(void *ptr);
@@ -159,28 +160,38 @@ static void release_progmem(void *ptr);
/* get the vpe associated with this minor */
static struct vpe *get_vpe(int minor)
{
- struct vpe *v;
+ struct vpe *res, *v;
if (!cpu_has_mipsmt)
return NULL;
+ res = NULL;
+ spin_lock(&vpecontrol.vpe_list_lock);
list_for_each_entry(v, &vpecontrol.vpe_list, list) {
- if (v->minor == minor)
- return v;
+ if (v->minor == minor) {
+ res = v;
+ break;
+ }
}
+ spin_unlock(&vpecontrol.vpe_list_lock);
- return NULL;
+ return res;
}
/* get the vpe associated with this minor */
static struct tc *get_tc(int index)
{
- struct tc *t;
+ struct tc *res, *t;
+ res = NULL;
+ spin_lock(&vpecontrol.tc_list_lock);
list_for_each_entry(t, &vpecontrol.tc_list, list) {
- if (t->index == index)
- return t;
+ if (t->index == index) {
+ res = t;
+ break;
+ }
}
+ spin_unlock(&vpecontrol.tc_list_lock);
return NULL;
}
@@ -190,15 +201,17 @@ static struct vpe *alloc_vpe(int minor)
{
struct vpe *v;
- if ((v = kzalloc(sizeof(struct vpe), GFP_KERNEL)) == NULL) {
+ if ((v = kzalloc(sizeof(struct vpe), GFP_KERNEL)) == NULL)
return NULL;
- }
INIT_LIST_HEAD(&v->tc);
+ spin_lock(&vpecontrol.vpe_list_lock);
list_add_tail(&v->list, &vpecontrol.vpe_list);
+ spin_unlock(&vpecontrol.vpe_list_lock);
INIT_LIST_HEAD(&v->notify);
v->minor = minor;
+
return v;
}
@@ -212,7 +225,10 @@ static struct tc *alloc_tc(int index)
INIT_LIST_HEAD(&tc->tc);
tc->index = index;
+
+ spin_lock(&vpecontrol.tc_list_lock);
list_add_tail(&tc->list, &vpecontrol.tc_list);
+ spin_unlock(&vpecontrol.tc_list_lock);
out:
return tc;
@@ -227,7 +243,7 @@ static void release_vpe(struct vpe *v)
kfree(v);
}
-static void dump_mtregs(void)
+static void __maybe_unused dump_mtregs(void)
{
unsigned long val;
@@ -1048,20 +1064,19 @@ static int vpe_open(struct inode *inode, struct file *filp)
enum vpe_state state;
struct vpe_notifications *not;
struct vpe *v;
- int ret, err = 0;
+ int ret;
- lock_kernel();
if (minor != iminor(inode)) {
/* assume only 1 device at the moment. */
- printk(KERN_WARNING "VPE loader: only vpe1 is supported\n");
- err = -ENODEV;
- goto out;
+ pr_warning("VPE loader: only vpe1 is supported\n");
+
+ return -ENODEV;
}
if ((v = get_vpe(tclimit)) == NULL) {
- printk(KERN_WARNING "VPE loader: unable to get vpe\n");
- err = -ENODEV;
- goto out;
+ pr_warning("VPE loader: unable to get vpe\n");
+
+ return -ENODEV;
}
state = xchg(&v->state, VPE_STATE_INUSE);
@@ -1101,8 +1116,6 @@ static int vpe_open(struct inode *inode, struct file *filp)
v->shared_ptr = NULL;
v->__start = 0;
-out:
- unlock_kernel();
return 0;
}
@@ -1594,14 +1607,14 @@ static void __exit vpe_module_exit(void)
{
struct vpe *v, *n;
+ device_del(&vpe_device);
+ unregister_chrdev(major, module_name);
+
+ /* No locking needed here */
list_for_each_entry_safe(v, n, &vpecontrol.vpe_list, list) {
- if (v->state != VPE_STATE_UNUSED) {
+ if (v->state != VPE_STATE_UNUSED)
release_vpe(v);
- }
}
-
- device_del(&vpe_device);
- unregister_chrdev(major, module_name);
}
module_init(vpe_module_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2024-12-26 21:29:13 +0000