4 files changed, 80 insertions, 42 deletions

diff --git a/arch/powerpc/platforms/cell/cpufreq_spudemand.c b/arch/powerpc/platforms/cell/cpufreq_spudemand.c
index 968c1c0..d809836 100644
--- a/arch/powerpc/platforms/cell/cpufreq_spudemand.c
+++ b/arch/powerpc/platforms/cell/cpufreq_spudemand.c
@@ -39,8 +39,6 @@ struct spu_gov_info_struct {
 };
 static DEFINE_PER_CPU(struct spu_gov_info_struct, spu_gov_info);
 
-static struct workqueue_struct *kspugov_wq;
-
 static int calc_freq(struct spu_gov_info_struct *info)
 {
 	int cpu;
@@ -71,14 +69,14 @@ static void spu_gov_work(struct work_struct *work)
 	__cpufreq_driver_target(info->policy, target_freq, CPUFREQ_RELATION_H);
 
 	delay = usecs_to_jiffies(info->poll_int);
-	queue_delayed_work_on(info->policy->cpu, kspugov_wq, &info->work, delay);
+	schedule_delayed_work_on(info->policy->cpu, &info->work, delay);
 }
 
 static void spu_gov_init_work(struct spu_gov_info_struct *info)
 {
 	int delay = usecs_to_jiffies(info->poll_int);
 	INIT_DELAYED_WORK_DEFERRABLE(&info->work, spu_gov_work);
-	queue_delayed_work_on(info->policy->cpu, kspugov_wq, &info->work, delay);
+	schedule_delayed_work_on(info->policy->cpu, &info->work, delay);
 }
 
 static void spu_gov_cancel_work(struct spu_gov_info_struct *info)
@@ -152,27 +150,15 @@ static int __init spu_gov_init(void)
 {
 	int ret;
 
-	kspugov_wq = create_workqueue("kspugov");
-	if (!kspugov_wq) {
-		printk(KERN_ERR "creation of kspugov failed\n");
-		ret = -EFAULT;
-		goto out;
-	}
-
 	ret = cpufreq_register_governor(&spu_governor);
-	if (ret) {
+	if (ret)
 		printk(KERN_ERR "registration of governor failed\n");
-		destroy_workqueue(kspugov_wq);
-		goto out;
-	}
-out:
 	return ret;
 }
 
 static void __exit spu_gov_exit(void)
 {
 	cpufreq_unregister_governor(&spu_governor);
-	destroy_workqueue(kspugov_wq);
 }
 
 
diff --git a/arch/powerpc/platforms/cell/qpace_setup.c b/arch/powerpc/platforms/cell/qpace_setup.c
index 1b57490..d31c594 100644
--- a/arch/powerpc/platforms/cell/qpace_setup.c
+++ b/arch/powerpc/platforms/cell/qpace_setup.c
@@ -145,9 +145,4 @@ define_machine(qpace) {
 	.calibrate_decr		= generic_calibrate_decr,
 	.progress		= qpace_progress,
 	.init_IRQ		= iic_init_IRQ,
-#ifdef CONFIG_KEXEC
-	.machine_kexec		= default_machine_kexec,
-	.machine_kexec_prepare	= default_machine_kexec_prepare,
-	.machine_crash_shutdown	= default_machine_crash_shutdown,
-#endif
 };
diff --git a/arch/powerpc/platforms/cell/spu_base.c b/arch/powerpc/platforms/cell/spu_base.c
index 8547e86..acfacce 100644
--- a/arch/powerpc/platforms/cell/spu_base.c
+++ b/arch/powerpc/platforms/cell/spu_base.c
@@ -37,6 +37,7 @@
 #include <asm/spu_csa.h>
 #include <asm/xmon.h>
 #include <asm/prom.h>
+#include <asm/kexec.h>
 
 const struct spu_management_ops *spu_management_ops;
 EXPORT_SYMBOL_GPL(spu_management_ops);
@@ -727,6 +728,75 @@ static ssize_t spu_stat_show(struct sys_device *sysdev,
 
 static SYSDEV_ATTR(stat, 0644, spu_stat_show, NULL);
 
+#ifdef CONFIG_KEXEC
+
+struct crash_spu_info {
+	struct spu *spu;
+	u32 saved_spu_runcntl_RW;
+	u32 saved_spu_status_R;
+	u32 saved_spu_npc_RW;
+	u64 saved_mfc_sr1_RW;
+	u64 saved_mfc_dar;
+	u64 saved_mfc_dsisr;
+};
+
+#define CRASH_NUM_SPUS	16	/* Enough for current hardware */
+static struct crash_spu_info crash_spu_info[CRASH_NUM_SPUS];
+
+static void crash_kexec_stop_spus(void)
+{
+	struct spu *spu;
+	int i;
+	u64 tmp;
+
+	for (i = 0; i < CRASH_NUM_SPUS; i++) {
+		if (!crash_spu_info[i].spu)
+			continue;
+
+		spu = crash_spu_info[i].spu;
+
+		crash_spu_info[i].saved_spu_runcntl_RW =
+			in_be32(&spu->problem->spu_runcntl_RW);
+		crash_spu_info[i].saved_spu_status_R =
+			in_be32(&spu->problem->spu_status_R);
+		crash_spu_info[i].saved_spu_npc_RW =
+			in_be32(&spu->problem->spu_npc_RW);
+
+		crash_spu_info[i].saved_mfc_dar    = spu_mfc_dar_get(spu);
+		crash_spu_info[i].saved_mfc_dsisr  = spu_mfc_dsisr_get(spu);
+		tmp = spu_mfc_sr1_get(spu);
+		crash_spu_info[i].saved_mfc_sr1_RW = tmp;
+
+		tmp &= ~MFC_STATE1_MASTER_RUN_CONTROL_MASK;
+		spu_mfc_sr1_set(spu, tmp);
+
+		__delay(200);
+	}
+}
+
+static void crash_register_spus(struct list_head *list)
+{
+	struct spu *spu;
+	int ret;
+
+	list_for_each_entry(spu, list, full_list) {
+		if (WARN_ON(spu->number >= CRASH_NUM_SPUS))
+			continue;
+
+		crash_spu_info[spu->number].spu = spu;
+	}
+
+	ret = crash_shutdown_register(&crash_kexec_stop_spus);
+	if (ret)
+		printk(KERN_ERR "Could not register SPU crash handler");
+}
+
+#else
+static inline void crash_register_spus(struct list_head *list)
+{
+}
+#endif
+
 static int __init init_spu_base(void)
 {
 	int i, ret = 0;
diff --git a/arch/powerpc/platforms/cell/spufs/file.c b/arch/powerpc/platforms/cell/spufs/file.c
index 02f7b11..3c7c3f8 100644
--- a/arch/powerpc/platforms/cell/spufs/file.c
+++ b/arch/powerpc/platforms/cell/spufs/file.c
@@ -219,24 +219,17 @@ spufs_mem_write(struct file *file, const char __user *buffer,
 	loff_t pos = *ppos;
 	int ret;
 
-	if (pos < 0)
-		return -EINVAL;
 	if (pos > LS_SIZE)
 		return -EFBIG;
-	if (size > LS_SIZE - pos)
-		size = LS_SIZE - pos;
 
 	ret = spu_acquire(ctx);
 	if (ret)
 		return ret;
 
 	local_store = ctx->ops->get_ls(ctx);
-	ret = copy_from_user(local_store + pos, buffer, size);
+	size = simple_write_to_buffer(local_store, LS_SIZE, ppos, buffer, size);
 	spu_release(ctx);
 
-	if (ret)
-		return -EFAULT;
-	*ppos = pos + size;
 	return size;
 }
 
@@ -574,18 +567,15 @@ spufs_regs_write(struct file *file, const char __user *buffer,
 	if (*pos >= sizeof(lscsa->gprs))
 		return -EFBIG;
 
-	size = min_t(ssize_t, sizeof(lscsa->gprs) - *pos, size);
-	*pos += size;
-
 	ret = spu_acquire_saved(ctx);
 	if (ret)
 		return ret;
 
-	ret = copy_from_user((char *)lscsa->gprs + *pos - size,
-			     buffer, size) ? -EFAULT : size;
+	size = simple_write_to_buffer(lscsa->gprs, sizeof(lscsa->gprs), pos,
+					buffer, size);
 
 	spu_release_saved(ctx);
-	return ret;
+	return size;
 }
 
 static const struct file_operations spufs_regs_fops = {
@@ -630,18 +620,15 @@ spufs_fpcr_write(struct file *file, const char __user * buffer,
 	if (*pos >= sizeof(lscsa->fpcr))
 		return -EFBIG;
 
-	size = min_t(ssize_t, sizeof(lscsa->fpcr) - *pos, size);
-
 	ret = spu_acquire_saved(ctx);
 	if (ret)
 		return ret;
 
-	*pos += size;
-	ret = copy_from_user((char *)&lscsa->fpcr + *pos - size,
-			     buffer, size) ? -EFAULT : size;
+	size = simple_write_to_buffer(&lscsa->fpcr, sizeof(lscsa->fpcr), pos,
+					buffer, size);
 
 	spu_release_saved(ctx);
-	return ret;
+	return size;
 }
 
 static const struct file_operations spufs_fpcr_fops = {