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Diffstat (limited to 'arch/mips/kernel/mips-mt.c')
-rw-r--r--arch/mips/kernel/mips-mt.c261
1 files changed, 63 insertions, 198 deletions
diff --git a/arch/mips/kernel/mips-mt.c b/arch/mips/kernel/mips-mt.c
index c1373a6e668..88b1ef5f868 100644
--- a/arch/mips/kernel/mips-mt.c
+++ b/arch/mips/kernel/mips-mt.c
@@ -1,162 +1,45 @@
/*
- * General MIPS MT support routines, usable in AP/SP, SMVP, or SMTC kernels
+ * General MIPS MT support routines, usable in AP/SP and SMVP.
* Copyright (C) 2005 Mips Technologies, Inc
*/
+#include <linux/device.h>
#include <linux/kernel.h>
#include <linux/sched.h>
-#include <linux/cpumask.h>
+#include <linux/export.h>
#include <linux/interrupt.h>
#include <linux/security.h>
#include <asm/cpu.h>
#include <asm/processor.h>
-#include <asm/atomic.h>
-#include <asm/system.h>
+#include <linux/atomic.h>
#include <asm/hardirq.h>
#include <asm/mmu_context.h>
-#include <asm/smp.h>
#include <asm/mipsmtregs.h>
#include <asm/r4kcache.h>
#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.
- */
+int vpelimit;
-/*
- * 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)
+static int __init maxvpes(char *str)
{
- return pid ? find_task_by_pid(pid) : current;
-}
-
+ get_option(&str, &vpelimit);
-/*
- * 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;
- }
-
- /* 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);
- }
+ return 1;
+}
+__setup("maxvpes=", maxvpes);
-out_unlock:
- put_task_struct(p);
- unlock_cpu_hotplug();
- return retval;
-}
+int tclimit;
-/*
- * 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)
+static int __init maxtcs(char *str)
{
- 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 = 0;
-
- 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;
+ get_option(&str, &tclimit);
+
+ return 1;
}
-#endif /* CONFIG_MIPS_MT_FPAFF */
+__setup("maxtcs=", maxtcs);
/*
* Dump new MIPS MT state for the core. Does not leave TCs halted.
@@ -174,9 +57,6 @@ void mips_mt_regdump(unsigned long mvpctl)
int tc;
unsigned long haltval;
unsigned long tcstatval;
-#ifdef CONFIG_MIPS_MT_SMTC
- void smtc_soft_dump(void);
-#endif /* CONFIG_MIPT_MT_SMTC */
local_irq_save(flags);
vpflags = dvpe();
@@ -188,27 +68,32 @@ void mips_mt_regdump(unsigned long mvpctl)
nvpe = ((mvpconf0 & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1;
ntc = ((mvpconf0 & MVPCONF0_PTC) >> MVPCONF0_PTC_SHIFT) + 1;
printk("-- per-VPE State --\n");
- for(i = 0; i < nvpe; i++) {
- for(tc = 0; tc < ntc; tc++) {
+ for (i = 0; i < nvpe; i++) {
+ for (tc = 0; tc < ntc; tc++) {
settc(tc);
- if((read_tc_c0_tcbind() & TCBIND_CURVPE) == i) {
- printk(" VPE %d\n", i);
- printk(" VPEControl : %08lx\n", read_vpe_c0_vpecontrol());
- printk(" VPEConf0 : %08lx\n", read_vpe_c0_vpeconf0());
- printk(" VPE%d.Status : %08lx\n",
- i, read_vpe_c0_status());
- printk(" VPE%d.EPC : %08lx\n", i, read_vpe_c0_epc());
- printk(" VPE%d.Cause : %08lx\n", i, read_vpe_c0_cause());
- printk(" VPE%d.Config7 : %08lx\n",
- i, read_vpe_c0_config7());
- break; /* Next VPE */
+ if ((read_tc_c0_tcbind() & TCBIND_CURVPE) == i) {
+ printk(" VPE %d\n", i);
+ printk(" VPEControl : %08lx\n",
+ read_vpe_c0_vpecontrol());
+ printk(" VPEConf0 : %08lx\n",
+ read_vpe_c0_vpeconf0());
+ printk(" VPE%d.Status : %08lx\n",
+ i, read_vpe_c0_status());
+ printk(" VPE%d.EPC : %08lx %pS\n",
+ i, read_vpe_c0_epc(),
+ (void *) read_vpe_c0_epc());
+ printk(" VPE%d.Cause : %08lx\n",
+ i, read_vpe_c0_cause());
+ printk(" VPE%d.Config7 : %08lx\n",
+ i, read_vpe_c0_config7());
+ break; /* Next VPE */
+ }
}
- }
}
printk("-- per-TC State --\n");
- for(tc = 0; tc < ntc; tc++) {
+ for (tc = 0; tc < ntc; tc++) {
settc(tc);
- if(read_tc_c0_tcbind() == read_c0_tcbind()) {
+ if (read_tc_c0_tcbind() == read_c0_tcbind()) {
/* Are we dumping ourself? */
haltval = 0; /* Then we're not halted, and mustn't be */
tcstatval = flags; /* And pre-dump TCStatus is flags */
@@ -221,24 +106,22 @@ void mips_mt_regdump(unsigned long mvpctl)
}
printk(" TCStatus : %08lx\n", tcstatval);
printk(" TCBind : %08lx\n", read_tc_c0_tcbind());
- printk(" TCRestart : %08lx\n", read_tc_c0_tcrestart());
+ printk(" TCRestart : %08lx %pS\n",
+ read_tc_c0_tcrestart(), (void *) read_tc_c0_tcrestart());
printk(" TCHalt : %08lx\n", haltval);
printk(" TCContext : %08lx\n", read_tc_c0_tccontext());
if (!haltval)
write_tc_c0_tchalt(0);
}
-#ifdef CONFIG_MIPS_MT_SMTC
- smtc_soft_dump();
-#endif /* CONFIG_MIPT_MT_SMTC */
printk("===========================\n");
evpe(vpflags);
local_irq_restore(flags);
}
-static int mt_opt_norps = 0;
+static int mt_opt_norps;
static int mt_opt_rpsctl = -1;
static int mt_opt_nblsu = -1;
-static int mt_opt_forceconfig7 = 0;
+static int mt_opt_forceconfig7;
static int mt_opt_config7 = -1;
static int __init rps_disable(char *s)
@@ -271,8 +154,8 @@ static int __init config7_set(char *str)
__setup("config7=", config7_set);
/* Experimental cache flush control parameters that should go away some day */
-int mt_protiflush = 0;
-int mt_protdflush = 0;
+int mt_protiflush;
+int mt_protdflush;
int mt_n_iflushes = 1;
int mt_n_dflushes = 1;
@@ -303,19 +186,8 @@ static int __init ndflush(char *s)
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;
+static unsigned int itc_base;
static int __init set_itc_base(char *str)
{
@@ -331,7 +203,7 @@ void mips_mt_set_cpuoptions(void)
unsigned int nconfig7 = oconfig7;
if (mt_opt_norps) {
- printk("\"norps\" option deprectated: use \"rpsctl=\"\n");
+ printk("\"norps\" option deprecated: use \"rpsctl=\"\n");
}
if (mt_opt_rpsctl >= 0) {
printk("34K return prediction stack override set to %d.\n",
@@ -355,7 +227,7 @@ void mips_mt_set_cpuoptions(void)
if (oconfig7 != nconfig7) {
__asm__ __volatile("sync");
write_c0_config7(nconfig7);
- ehb ();
+ ehb();
printk("Config7: 0x%08x\n", read_c0_config7());
}
@@ -369,20 +241,6 @@ void mips_mt_set_cpuoptions(void)
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
@@ -431,20 +289,27 @@ void mips_mt_set_cpuoptions(void)
void mt_cflush_lockdown(void)
{
-#ifdef CONFIG_MIPS_MT_SMTC
- void smtc_cflush_lockdown(void);
-
- smtc_cflush_lockdown();
-#endif /* CONFIG_MIPS_MT_SMTC */
/* FILL IN VSMP and AP/SP VERSIONS HERE */
}
void mt_cflush_release(void)
{
-#ifdef CONFIG_MIPS_MT_SMTC
- void smtc_cflush_release(void);
-
- smtc_cflush_release();
-#endif /* CONFIG_MIPS_MT_SMTC */
/* FILL IN VSMP and AP/SP VERSIONS HERE */
}
+
+struct class *mt_class;
+
+static int __init mt_init(void)
+{
+ struct class *mtc;
+
+ mtc = class_create(THIS_MODULE, "mt");
+ if (IS_ERR(mtc))
+ return PTR_ERR(mtc);
+
+ mt_class = mtc;
+
+ return 0;
+}
+
+subsys_initcall(mt_init);
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-12-06 11:40:25 +0000