[MIPS] Move FPU affinity code into separate file.
Gets rid of some of the CONFIG_MIPS_MT_FPAFF #ifdefery.
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 73983ee..4b40015 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -37,6 +37,7 @@
obj-$(CONFIG_SMP) += smp.o
obj-$(CONFIG_MIPS_MT) += mips-mt.o
+obj-$(CONFIG_MIPS_MT_FPAFF) += mips-mt-fpaff.o
obj-$(CONFIG_MIPS_MT_SMTC) += smtc.o smtc-asm.o smtc-proc.o
obj-$(CONFIG_MIPS_MT_SMP) += smp-mt.o
diff --git a/arch/mips/kernel/mips-mt-fpaff.c b/arch/mips/kernel/mips-mt-fpaff.c
new file mode 100644
index 0000000..ede5d73d
--- /dev/null
+++ b/arch/mips/kernel/mips-mt-fpaff.c
@@ -0,0 +1,176 @@
+/*
+ * General MIPS MT support routines, usable in AP/SP, SMVP, or SMTC kernels
+ * Copyright (C) 2005 Mips Technologies, Inc
+ */
+#include <linux/cpu.h>
+#include <linux/cpumask.h>
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/sched.h>
+#include <linux/security.h>
+#include <linux/types.h>
+#include <asm/uaccess.h>
+
+/*
+ * CPU mask used to set process affinity for MT VPEs/TCs with FPUs
+ */
+cpumask_t mt_fpu_cpumask;
+
+static int fpaff_threshold = -1;
+unsigned long mt_fpemul_threshold = 0;
+
+/*
+ * Replacement functions for the sys_sched_setaffinity() and
+ * sys_sched_getaffinity() system calls, so that we can integrate
+ * FPU affinity with the user's requested processor affinity.
+ * This code is 98% identical with the sys_sched_setaffinity()
+ * and sys_sched_getaffinity() system calls, and should be
+ * updated when kernel/sched.c changes.
+ */
+
+/*
+ * find_process_by_pid - find a process with a matching PID value.
+ * used in sys_sched_set/getaffinity() in kernel/sched.c, so
+ * cloned here.
+ */
+static inline struct task_struct *find_process_by_pid(pid_t pid)
+{
+ return pid ? find_task_by_pid(pid) : current;
+}
+
+
+/*
+ * mipsmt_sys_sched_setaffinity - set the cpu affinity of a process
+ */
+asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
+ unsigned long __user *user_mask_ptr)
+{
+ cpumask_t new_mask;
+ cpumask_t effective_mask;
+ int retval;
+ struct task_struct *p;
+
+ if (len < sizeof(new_mask))
+ return -EINVAL;
+
+ if (copy_from_user(&new_mask, user_mask_ptr, sizeof(new_mask)))
+ return -EFAULT;
+
+ lock_cpu_hotplug();
+ read_lock(&tasklist_lock);
+
+ p = find_process_by_pid(pid);
+ if (!p) {
+ read_unlock(&tasklist_lock);
+ unlock_cpu_hotplug();
+ return -ESRCH;
+ }
+
+ /*
+ * It is not safe to call set_cpus_allowed with the
+ * tasklist_lock held. We will bump the task_struct's
+ * usage count and drop tasklist_lock before invoking
+ * set_cpus_allowed.
+ */
+ get_task_struct(p);
+
+ retval = -EPERM;
+ if ((current->euid != p->euid) && (current->euid != p->uid) &&
+ !capable(CAP_SYS_NICE)) {
+ read_unlock(&tasklist_lock);
+ goto out_unlock;
+ }
+
+ retval = security_task_setscheduler(p, 0, NULL);
+ if (retval)
+ goto out_unlock;
+
+ /* Record new user-specified CPU set for future reference */
+ p->thread.user_cpus_allowed = new_mask;
+
+ /* Unlock the task list */
+ read_unlock(&tasklist_lock);
+
+ /* Compute new global allowed CPU set if necessary */
+ if ((p->thread.mflags & MF_FPUBOUND)
+ && cpus_intersects(new_mask, mt_fpu_cpumask)) {
+ cpus_and(effective_mask, new_mask, mt_fpu_cpumask);
+ retval = set_cpus_allowed(p, effective_mask);
+ } else {
+ p->thread.mflags &= ~MF_FPUBOUND;
+ retval = set_cpus_allowed(p, new_mask);
+ }
+
+
+out_unlock:
+ put_task_struct(p);
+ unlock_cpu_hotplug();
+ return retval;
+}
+
+/*
+ * mipsmt_sys_sched_getaffinity - get the cpu affinity of a process
+ */
+asmlinkage long mipsmt_sys_sched_getaffinity(pid_t pid, unsigned int len,
+ unsigned long __user *user_mask_ptr)
+{
+ unsigned int real_len;
+ cpumask_t mask;
+ int retval;
+ struct task_struct *p;
+
+ real_len = sizeof(mask);
+ if (len < real_len)
+ return -EINVAL;
+
+ lock_cpu_hotplug();
+ read_lock(&tasklist_lock);
+
+ retval = -ESRCH;
+ p = find_process_by_pid(pid);
+ if (!p)
+ goto out_unlock;
+ retval = security_task_getscheduler(p);
+ if (retval)
+ goto out_unlock;
+
+ cpus_and(mask, p->thread.user_cpus_allowed, cpu_possible_map);
+
+out_unlock:
+ read_unlock(&tasklist_lock);
+ unlock_cpu_hotplug();
+ if (retval)
+ return retval;
+ if (copy_to_user(user_mask_ptr, &mask, real_len))
+ return -EFAULT;
+ return real_len;
+}
+
+
+static int __init fpaff_thresh(char *str)
+{
+ get_option(&str, &fpaff_threshold);
+ return 1;
+}
+__setup("fpaff=", fpaff_thresh);
+
+/*
+ * FPU Use Factor empirically derived from experiments on 34K
+ */
+#define FPUSEFACTOR 333
+
+static __init int mt_fp_affinity_init(void)
+{
+ if (fpaff_threshold >= 0) {
+ mt_fpemul_threshold = fpaff_threshold;
+ } else {
+ mt_fpemul_threshold =
+ (FPUSEFACTOR * (loops_per_jiffy/(500000/HZ))) / HZ;
+ }
+ printk(KERN_DEBUG "FPU Affinity set after %ld emulations\n",
+ mt_fpemul_threshold);
+
+ return 0;
+}
+arch_initcall(mt_fp_affinity_init);
diff --git a/arch/mips/kernel/mips-mt.c b/arch/mips/kernel/mips-mt.c
index b1b994d..1a7d892 100644
--- a/arch/mips/kernel/mips-mt.c
+++ b/arch/mips/kernel/mips-mt.c
@@ -6,7 +6,6 @@
#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/sched.h>
-#include <linux/cpumask.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/security.h>
@@ -23,149 +22,6 @@
#include <asm/cacheflush.h>
/*
- * CPU mask used to set process affinity for MT VPEs/TCs with FPUs
- */
-
-cpumask_t mt_fpu_cpumask;
-
-#ifdef CONFIG_MIPS_MT_FPAFF
-
-#include <linux/cpu.h>
-#include <linux/delay.h>
-#include <asm/uaccess.h>
-
-unsigned long mt_fpemul_threshold = 0;
-
-/*
- * Replacement functions for the sys_sched_setaffinity() and
- * sys_sched_getaffinity() system calls, so that we can integrate
- * FPU affinity with the user's requested processor affinity.
- * This code is 98% identical with the sys_sched_setaffinity()
- * and sys_sched_getaffinity() system calls, and should be
- * updated when kernel/sched.c changes.
- */
-
-/*
- * find_process_by_pid - find a process with a matching PID value.
- * used in sys_sched_set/getaffinity() in kernel/sched.c, so
- * cloned here.
- */
-static inline struct task_struct *find_process_by_pid(pid_t pid)
-{
- return pid ? find_task_by_pid(pid) : current;
-}
-
-
-/*
- * mipsmt_sys_sched_setaffinity - set the cpu affinity of a process
- */
-asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
- unsigned long __user *user_mask_ptr)
-{
- cpumask_t new_mask;
- cpumask_t effective_mask;
- int retval;
- struct task_struct *p;
-
- if (len < sizeof(new_mask))
- return -EINVAL;
-
- if (copy_from_user(&new_mask, user_mask_ptr, sizeof(new_mask)))
- return -EFAULT;
-
- lock_cpu_hotplug();
- read_lock(&tasklist_lock);
-
- p = find_process_by_pid(pid);
- if (!p) {
- read_unlock(&tasklist_lock);
- unlock_cpu_hotplug();
- return -ESRCH;
- }
-
- /*
- * It is not safe to call set_cpus_allowed with the
- * tasklist_lock held. We will bump the task_struct's
- * usage count and drop tasklist_lock before invoking
- * set_cpus_allowed.
- */
- get_task_struct(p);
-
- retval = -EPERM;
- if ((current->euid != p->euid) && (current->euid != p->uid) &&
- !capable(CAP_SYS_NICE)) {
- read_unlock(&tasklist_lock);
- goto out_unlock;
- }
-
- retval = security_task_setscheduler(p, 0, NULL);
- if (retval)
- goto out_unlock;
-
- /* Record new user-specified CPU set for future reference */
- p->thread.user_cpus_allowed = new_mask;
-
- /* Unlock the task list */
- read_unlock(&tasklist_lock);
-
- /* Compute new global allowed CPU set if necessary */
- if ((p->thread.mflags & MF_FPUBOUND)
- && cpus_intersects(new_mask, mt_fpu_cpumask)) {
- cpus_and(effective_mask, new_mask, mt_fpu_cpumask);
- retval = set_cpus_allowed(p, effective_mask);
- } else {
- p->thread.mflags &= ~MF_FPUBOUND;
- retval = set_cpus_allowed(p, new_mask);
- }
-
-
-out_unlock:
- put_task_struct(p);
- unlock_cpu_hotplug();
- return retval;
-}
-
-/*
- * mipsmt_sys_sched_getaffinity - get the cpu affinity of a process
- */
-asmlinkage long mipsmt_sys_sched_getaffinity(pid_t pid, unsigned int len,
- unsigned long __user *user_mask_ptr)
-{
- unsigned int real_len;
- cpumask_t mask;
- int retval;
- struct task_struct *p;
-
- real_len = sizeof(mask);
- if (len < real_len)
- return -EINVAL;
-
- lock_cpu_hotplug();
- read_lock(&tasklist_lock);
-
- retval = -ESRCH;
- p = find_process_by_pid(pid);
- if (!p)
- goto out_unlock;
- retval = security_task_getscheduler(p);
- if (retval)
- goto out_unlock;
-
- cpus_and(mask, p->thread.user_cpus_allowed, cpu_possible_map);
-
-out_unlock:
- read_unlock(&tasklist_lock);
- unlock_cpu_hotplug();
- if (retval)
- return retval;
- if (copy_to_user(user_mask_ptr, &mask, real_len))
- return -EFAULT;
- return real_len;
-}
-
-#endif /* CONFIG_MIPS_MT_FPAFF */
-
-/*
* Dump new MIPS MT state for the core. Does not leave TCs halted.
* Takes an argument which taken to be a pre-call MVPControl value.
*/
@@ -314,17 +170,6 @@
return 1;
}
__setup("ndflush=", ndflush);
-#ifdef CONFIG_MIPS_MT_FPAFF
-static int fpaff_threshold = -1;
-
-static int __init fpaff_thresh(char *str)
-{
- get_option(&str, &fpaff_threshold);
- return 1;
-}
-
-__setup("fpaff=", fpaff_thresh);
-#endif /* CONFIG_MIPS_MT_FPAFF */
static unsigned int itc_base = 0;
@@ -380,20 +225,6 @@
if (mt_n_dflushes != 1)
printk("D-Cache Flushes Repeated %d times\n", mt_n_dflushes);
-#ifdef CONFIG_MIPS_MT_FPAFF
- /* FPU Use Factor empirically derived from experiments on 34K */
-#define FPUSEFACTOR 333
-
- if (fpaff_threshold >= 0) {
- mt_fpemul_threshold = fpaff_threshold;
- } else {
- mt_fpemul_threshold =
- (FPUSEFACTOR * (loops_per_jiffy / (500000 / HZ))) / HZ;
- }
- printk("FPU Affinity set after %ld emulations\n",
- mt_fpemul_threshold);
-#endif /* CONFIG_MIPS_MT_FPAFF */
-
if (itc_base != 0) {
/*
* Configure ITC mapping. This code is very
