23 files changed, 452 insertions, 268 deletions

diff --git a/arch/mips/kernel/Makefile b/arch/mips/kernel/Makefile
index 5c8085b6d7ab..07344cb37596 100644
--- a/arch/mips/kernel/Makefile
+++ b/arch/mips/kernel/Makefile
@@ -71,3 +71,5 @@ obj-$(CONFIG_EARLY_PRINTK)	+= early_printk.o
 CFLAGS_cpu-bugs64.o     = $(shell if $(CC) $(CFLAGS) -Wa,-mdaddi -c -o /dev/null -xc /dev/null >/dev/null 2>&1; then echo "-DHAVE_AS_SET_DADDI"; fi)
 
 obj-$(CONFIG_HAVE_STD_PC_SERIAL_PORT)   += 8250-platform.o
+
+EXTRA_CFLAGS += -Werror
diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c
index 3b27309d54b1..013327286c26 100644
--- a/arch/mips/kernel/asm-offsets.c
+++ b/arch/mips/kernel/asm-offsets.c
@@ -132,7 +132,6 @@ void output_thread_defines(void)
         offset("#define THREAD_ECODE   ", struct task_struct, \
                thread.error_code);
         offset("#define THREAD_TRAPNO  ", struct task_struct, thread.trap_no);
-        offset("#define THREAD_MFLAGS  ", struct task_struct, thread.mflags);
         offset("#define THREAD_TRAMP   ", struct task_struct, \
                thread.irix_trampoline);
         offset("#define THREAD_OLDCTX  ", struct task_struct, \
diff --git a/arch/mips/kernel/head.S b/arch/mips/kernel/head.S
index c15bbc436bbd..e46782b0ebc8 100644
--- a/arch/mips/kernel/head.S
+++ b/arch/mips/kernel/head.S
@@ -138,7 +138,6 @@
         .fill   0x400
 #endif
 
-EXPORT(stext)                                   # used for profiling
 EXPORT(_stext)
 
 #ifndef CONFIG_BOOT_RAW
diff --git a/arch/mips/kernel/kspd.c b/arch/mips/kernel/kspd.c
index c6580018c94b..cb9a14a1ca5b 100644
--- a/arch/mips/kernel/kspd.c
+++ b/arch/mips/kernel/kspd.c
@@ -89,7 +89,7 @@ static int sp_stopping = 0;
 #define MTSP_O_EXCL             0x0800
 #define MTSP_O_BINARY           0x8000
 
-#define SP_VPE 1
+extern int tclimit;
 
 struct apsp_table  {
         int sp;
@@ -225,8 +225,8 @@ void sp_work_handle_request(void)
         /* Run the syscall at the priviledge of the user who loaded the
            SP program */
 
-        if (vpe_getuid(SP_VPE))
-                sp_setfsuidgid( vpe_getuid(SP_VPE), vpe_getgid(SP_VPE));
+        if (vpe_getuid(tclimit))
+                sp_setfsuidgid(vpe_getuid(tclimit), vpe_getgid(tclimit));
 
         switch (sc.cmd) {
         /* needs the flags argument translating from SDE kit to
@@ -245,7 +245,7 @@ void sp_work_handle_request(void)
 
         case MTSP_SYSCALL_EXIT:
                 list_for_each_entry(n, &kspd_notifylist, list)
-                        n->kspd_sp_exit(SP_VPE);
+                        n->kspd_sp_exit(tclimit);
                 sp_stopping = 1;
 
                 printk(KERN_DEBUG "KSPD got exit syscall from SP exitcode %d\n",
@@ -255,7 +255,7 @@ void sp_work_handle_request(void)
         case MTSP_SYSCALL_OPEN:
                 generic.arg1 = translate_open_flags(generic.arg1);
 
-                vcwd = vpe_getcwd(SP_VPE);
+                vcwd = vpe_getcwd(tclimit);
 
                 /* change to the cwd of the process that loaded the SP program */
                 old_fs = get_fs();
@@ -283,7 +283,7 @@ void sp_work_handle_request(void)
                 break;
         } /* switch */
 
-        if (vpe_getuid(SP_VPE))
+        if (vpe_getuid(tclimit))
                 sp_setfsuidgid( 0, 0);
 
         old_fs = get_fs();
@@ -364,10 +364,9 @@ static void startwork(int vpe)
                 }
 
                 INIT_WORK(&work, sp_work);
-                queue_work(workqueue, &work);
-        } else
-                queue_work(workqueue, &work);
+        }
 
+        queue_work(workqueue, &work);
 }
 
 static void stopwork(int vpe)
@@ -389,7 +388,7 @@ static int kspd_module_init(void)
 
         notify.start = startwork;
         notify.stop = stopwork;
-        vpe_notify(SP_VPE, &notify);
+        vpe_notify(tclimit, &notify);
 
         return 0;
 }
diff --git a/arch/mips/kernel/linux32.c b/arch/mips/kernel/linux32.c
index c37568d6fb55..135d9a5fe337 100644
--- a/arch/mips/kernel/linux32.c
+++ b/arch/mips/kernel/linux32.c
@@ -566,6 +566,13 @@ asmlinkage long sys32_fadvise64_64(int fd, int __pad,
                         flags);
 }
 
+asmlinkage long sys32_fallocate(int fd, int mode, unsigned offset_a2,
+        unsigned offset_a3, unsigned len_a4, unsigned len_a5)
+{
+        return sys_fallocate(fd, mode, merge_64(offset_a2, offset_a3),
+                             merge_64(len_a4, len_a5));
+}
+
 save_static_function(sys32_clone);
 static int noinline __used
 _sys32_clone(nabi_no_regargs struct pt_regs regs)
diff --git a/arch/mips/kernel/machine_kexec.c b/arch/mips/kernel/machine_kexec.c
index 8f42fa85ac9e..22960d67cf07 100644
--- a/arch/mips/kernel/machine_kexec.c
+++ b/arch/mips/kernel/machine_kexec.c
@@ -14,7 +14,7 @@
 #include <asm/page.h>
 
 extern const unsigned char relocate_new_kernel[];
-extern const unsigned int relocate_new_kernel_size;
+extern const size_t relocate_new_kernel_size;
 
 extern unsigned long kexec_start_address;
 extern unsigned long kexec_indirection_page;
@@ -40,6 +40,8 @@ machine_crash_shutdown(struct pt_regs *regs)
 {
 }
 
+typedef void (*noretfun_t)(void) __attribute__((noreturn));
+
 void
 machine_kexec(struct kimage *image)
 {
@@ -51,7 +53,8 @@ machine_kexec(struct kimage *image)
           (unsigned long)page_address(image->control_code_page);
 
         kexec_start_address = image->start;
-        kexec_indirection_page = phys_to_virt(image->head & PAGE_MASK);
+        kexec_indirection_page =
+                (unsigned long) phys_to_virt(image->head & PAGE_MASK);
 
         memcpy((void*)reboot_code_buffer, relocate_new_kernel,
                relocate_new_kernel_size);
@@ -67,7 +70,7 @@ machine_kexec(struct kimage *image)
                phys_to_virt(entry & PAGE_MASK) : ptr + 1) {
                 if (*ptr & IND_SOURCE || *ptr & IND_INDIRECTION ||
                     *ptr & IND_DESTINATION)
-                        *ptr = phys_to_virt(*ptr);
+                        *ptr = (unsigned long) phys_to_virt(*ptr);
         }
 
         /*
@@ -78,8 +81,8 @@ machine_kexec(struct kimage *image)
         flush_icache_range(reboot_code_buffer,
                            reboot_code_buffer + KEXEC_CONTROL_CODE_SIZE);
 
-        printk("Will call new kernel at %08x\n", image->start);
+        printk("Will call new kernel at %08lx\n", image->start);
         printk("Bye ...\n");
         flush_cache_all();
-        ((void (*)(void))reboot_code_buffer)();
+        ((noretfun_t) reboot_code_buffer)();
 }
diff --git a/arch/mips/kernel/mips-mt-fpaff.c b/arch/mips/kernel/mips-mt-fpaff.c
index ede5d73d652e..892665bb12b1 100644
--- a/arch/mips/kernel/mips-mt-fpaff.c
+++ b/arch/mips/kernel/mips-mt-fpaff.c
@@ -50,6 +50,7 @@ asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
         cpumask_t effective_mask;
         int retval;
         struct task_struct *p;
+        struct thread_info *ti;
 
         if (len < sizeof(new_mask))
                 return -EINVAL;
@@ -93,16 +94,16 @@ asmlinkage long mipsmt_sys_sched_setaffinity(pid_t pid, unsigned int len,
         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)) {
+        ti = task_thread_info(p);
+        if (test_ti_thread_flag(ti, TIF_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;
+                clear_ti_thread_flag(ti, TIF_FPUBOUND);
                 retval = set_cpus_allowed(p, new_mask);
         }
 
-
 out_unlock:
         put_task_struct(p);
         unlock_cpu_hotplug();
diff --git a/arch/mips/kernel/mips-mt.c b/arch/mips/kernel/mips-mt.c
index 1a7d89231299..7169a4db37b8 100644
--- a/arch/mips/kernel/mips-mt.c
+++ b/arch/mips/kernel/mips-mt.c
@@ -21,6 +21,28 @@
 #include <asm/r4kcache.h>
 #include <asm/cacheflush.h>
 
+int vpelimit;
+
+static int __init maxvpes(char *str)
+{
+        get_option(&str, &vpelimit);
+
+        return 1;
+}
+
+__setup("maxvpes=", maxvpes);
+
+int tclimit;
+
+static int __init maxtcs(char *str)
+{
+        get_option(&str, &tclimit);
+
+        return 1;
+}
+
+__setup("maxtcs=", maxtcs);
+
 /*
  * 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.
diff --git a/arch/mips/kernel/process.c b/arch/mips/kernel/process.c
index bd05f5a927ea..e6ce943099a0 100644
--- a/arch/mips/kernel/process.c
+++ b/arch/mips/kernel/process.c
@@ -77,7 +77,7 @@ void start_thread(struct pt_regs * regs, unsigned long pc, unsigned long sp)
         status = regs->cp0_status & ~(ST0_CU0|ST0_CU1|KU_MASK);
 #ifdef CONFIG_64BIT
         status &= ~ST0_FR;
-        status |= (current->thread.mflags & MF_32BIT_REGS) ? 0 : ST0_FR;
+        status |= test_thread_flag(TIF_32BIT_REGS) ? 0 : ST0_FR;
 #endif
         status |= KU_USER;
         regs->cp0_status = status;
diff --git a/arch/mips/kernel/ptrace.c b/arch/mips/kernel/ptrace.c
index 893e7bccf226..bbd57b20b43e 100644
--- a/arch/mips/kernel/ptrace.c
+++ b/arch/mips/kernel/ptrace.c
@@ -20,11 +20,11 @@
 #include <linux/mm.h>
 #include <linux/errno.h>
 #include <linux/ptrace.h>
-#include <linux/audit.h>
 #include <linux/smp.h>
 #include <linux/user.h>
 #include <linux/security.h>
-#include <linux/signal.h>
+#include <linux/audit.h>
+#include <linux/seccomp.h>
 
 #include <asm/byteorder.h>
 #include <asm/cpu.h>
@@ -470,12 +470,17 @@ static inline int audit_arch(void)
  */
 asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit)
 {
+        /* do the secure computing check first */
+        if (!entryexit)
+                secure_computing(regs->regs[0]);
+
         if (unlikely(current->audit_context) && entryexit)
                 audit_syscall_exit(AUDITSC_RESULT(regs->regs[2]),
                                    regs->regs[2]);
 
         if (!(current->ptrace & PT_PTRACED))
                 goto out;
+
         if (!test_thread_flag(TIF_SYSCALL_TRACE))
                 goto out;
 
@@ -493,9 +498,10 @@ asmlinkage void do_syscall_trace(struct pt_regs *regs, int entryexit)
                 send_sig(current->exit_code, current, 1);
                 current->exit_code = 0;
         }
- out:
+
+out:
         if (unlikely(current->audit_context) && !entryexit)
-                audit_syscall_entry(audit_arch(), regs->regs[2],
+                audit_syscall_entry(audit_arch(), regs->regs[0],
                                     regs->regs[4], regs->regs[5],
                                     regs->regs[6], regs->regs[7]);
 }
diff --git a/arch/mips/kernel/relocate_kernel.S b/arch/mips/kernel/relocate_kernel.S
index a3f0d00c1334..87481f916a61 100644
--- a/arch/mips/kernel/relocate_kernel.S
+++ b/arch/mips/kernel/relocate_kernel.S
@@ -14,67 +14,69 @@
 #include <asm/stackframe.h>
 #include <asm/addrspace.h>
 
-        .globl relocate_new_kernel
-relocate_new_kernel:
-
-        PTR_L   s0, kexec_indirection_page
-        PTR_L   s1, kexec_start_address
+LEAF(relocate_new_kernel)
+        PTR_L           s0, kexec_indirection_page
+        PTR_L           s1, kexec_start_address
 
 process_entry:
-        PTR_L   s2, (s0)
-        PTR_ADD s0, s0, SZREG
+        PTR_L           s2, (s0)
+        PTR_ADD         s0, s0, SZREG
 
         /* destination page */
-        and     s3, s2, 0x1
-        beq     s3, zero, 1f
-        and     s4, s2, ~0x1    /* store destination addr in s4 */
-        move    a0, s4
-        b       process_entry
+        and             s3, s2, 0x1
+        beq             s3, zero, 1f
+        and             s4, s2, ~0x1    /* store destination addr in s4 */
+        move            a0, s4
+        b               process_entry
 
 1:
         /* indirection page, update s0  */
-        and     s3, s2, 0x2
-        beq     s3, zero, 1f
-        and     s0, s2, ~0x2
-        b       process_entry
+        and             s3, s2, 0x2
+        beq             s3, zero, 1f
+        and             s0, s2, ~0x2
+        b               process_entry
 
 1:
         /* done page */
-        and     s3, s2, 0x4
-        beq     s3, zero, 1f
-        b       done
+        and             s3, s2, 0x4
+        beq             s3, zero, 1f
+        b               done
 1:
         /* source page */
-        and     s3, s2, 0x8
-        beq     s3, zero, process_entry
-        and     s2, s2, ~0x8
-        li      s6, (1 << PAGE_SHIFT) / SZREG
+        and             s3, s2, 0x8
+        beq             s3, zero, process_entry
+        and             s2, s2, ~0x8
+        li              s6, (1 << PAGE_SHIFT) / SZREG
 
 copy_word:
         /* copy page word by word */
-        REG_L   s5, (s2)
-        REG_S   s5, (s4)
-        INT_ADD s4, s4, SZREG
-        INT_ADD s2, s2, SZREG
-        INT_SUB s6, s6, 1
-        beq     s6, zero, process_entry
-        b       copy_word
-        b       process_entry
+        REG_L           s5, (s2)
+        REG_S           s5, (s4)
+        PTR_ADD         s4, s4, SZREG
+        PTR_ADD         s2, s2, SZREG
+        LONG_SUB        s6, s6, 1
+        beq             s6, zero, process_entry
+        b               copy_word
+        b               process_entry
 
 done:
         /* jump to kexec_start_address */
-        j       s1
+        j               s1
+        END(relocate_new_kernel)
 
-        .globl kexec_start_address
 kexec_start_address:
-        .long   0x0
+        EXPORT(kexec_start_address)
+        PTR             0x0
+        .size           kexec_start_address, PTRSIZE
 
-        .globl kexec_indirection_page
 kexec_indirection_page:
-        .long   0x0
+        EXPORT(kexec_indirection_page)
+        PTR             0
+        .size           kexec_indirection_page, PTRSIZE
 
 relocate_new_kernel_end:
 
-        .globl relocate_new_kernel_size
 relocate_new_kernel_size:
-        .long relocate_new_kernel_end - relocate_new_kernel
+        EXPORT(relocate_new_kernel_size)
+        PTR             relocate_new_kernel_end - relocate_new_kernel
+        .size           relocate_new_kernel_size, PTRSIZE
diff --git a/arch/mips/kernel/rtlx.c b/arch/mips/kernel/rtlx.c
index 8cf24d716d41..aab89e97abb5 100644
--- a/arch/mips/kernel/rtlx.c
+++ b/arch/mips/kernel/rtlx.c
@@ -40,12 +40,11 @@
 #include <asm/atomic.h>
 #include <asm/cpu.h>
 #include <asm/processor.h>
+#include <asm/mips_mt.h>
 #include <asm/system.h>
 #include <asm/vpe.h>
 #include <asm/rtlx.h>
 
-#define RTLX_TARG_VPE 1
-
 static struct rtlx_info *rtlx;
 static int major;
 static char module_name[] = "rtlx";
@@ -165,10 +164,10 @@ int rtlx_open(int index, int can_sleep)
         }
 
         if (rtlx == NULL) {
-                if( (p = vpe_get_shared(RTLX_TARG_VPE)) == NULL) {
+                if( (p = vpe_get_shared(tclimit)) == NULL) {
                         if (can_sleep) {
                                 __wait_event_interruptible(channel_wqs[index].lx_queue,
-                                                           (p = vpe_get_shared(RTLX_TARG_VPE)),
+                                                           (p = vpe_get_shared(tclimit)),
                                                            ret);
                                 if (ret)
                                         goto out_fail;
@@ -472,11 +471,24 @@ static int rtlx_irq_num = MIPS_CPU_IRQ_BASE + MIPS_CPU_RTLX_IRQ;
 static char register_chrdev_failed[] __initdata =
         KERN_ERR "rtlx_module_init: unable to register device\n";
 
-static int rtlx_module_init(void)
+static int __init rtlx_module_init(void)
 {
         struct device *dev;
         int i, err;
 
+        if (!cpu_has_mipsmt) {
+                printk("VPE loader: not a MIPS MT capable processor\n");
+                return -ENODEV;
+        }
+
+        if (tclimit == 0) {
+                printk(KERN_WARNING "No TCs reserved for AP/SP, not "
+                       "initializing RTLX.\nPass maxtcs=<n> argument as kernel "
+                       "argument\n");
+
+                return -ENODEV;
+        }
+
         major = register_chrdev(0, module_name, &rtlx_fops);
         if (major < 0) {
                 printk(register_chrdev_failed);
@@ -501,7 +513,7 @@ static int rtlx_module_init(void)
         /* set up notifiers */
         notify.start = starting;
         notify.stop = stopping;
-        vpe_notify(RTLX_TARG_VPE, &notify);
+        vpe_notify(tclimit, &notify);
 
         if (cpu_has_vint)
                 set_vi_handler(MIPS_CPU_RTLX_IRQ, rtlx_dispatch);
diff --git a/arch/mips/kernel/scall32-o32.S b/arch/mips/kernel/scall32-o32.S
index ae985d1fcca1..82480a1717d8 100644
--- a/arch/mips/kernel/scall32-o32.S
+++ b/arch/mips/kernel/scall32-o32.S
@@ -662,6 +662,7 @@ einval:	li	v0, -EINVAL
         sys     sys_signalfd            3
         sys     sys_timerfd             4
         sys     sys_eventfd             1
+        sys     sys_fallocate           6       /* 4320 */
         .endm
 
         /* We pre-compute the number of _instruction_ bytes needed to
diff --git a/arch/mips/kernel/scall64-64.S b/arch/mips/kernel/scall64-64.S
index 7bcd5a1a85f5..c2c10876da2e 100644
--- a/arch/mips/kernel/scall64-64.S
+++ b/arch/mips/kernel/scall64-64.S
@@ -477,4 +477,5 @@ sys_call_table:
         PTR     sys_signalfd
         PTR     sys_timerfd
         PTR     sys_eventfd
+        PTR     sys_fallocate
         .size   sys_call_table,.-sys_call_table
diff --git a/arch/mips/kernel/scall64-n32.S b/arch/mips/kernel/scall64-n32.S
index 532a2f3b42fc..53d7a977193c 100644
--- a/arch/mips/kernel/scall64-n32.S
+++ b/arch/mips/kernel/scall64-n32.S
@@ -403,4 +403,5 @@ EXPORT(sysn32_call_table)
         PTR     compat_sys_signalfd             /* 5280 */
         PTR     compat_sys_timerfd
         PTR     sys_eventfd
+        PTR     sys_fallocate
         .size   sysn32_call_table,.-sysn32_call_table
diff --git a/arch/mips/kernel/scall64-o32.S b/arch/mips/kernel/scall64-o32.S
index 6bbe0f4ed8ba..b3ed731a24c6 100644
--- a/arch/mips/kernel/scall64-o32.S
+++ b/arch/mips/kernel/scall64-o32.S
@@ -525,4 +525,5 @@ sys_call_table:
         PTR     compat_sys_signalfd
         PTR     compat_sys_timerfd
         PTR     sys_eventfd
+        PTR     sys_fallocate                   /* 4320 */
         .size   sys_call_table,.-sys_call_table
diff --git a/arch/mips/kernel/signal32.c b/arch/mips/kernel/signal32.c
index 486b8e5f52d0..64b612a0a622 100644
--- a/arch/mips/kernel/signal32.c
+++ b/arch/mips/kernel/signal32.c
@@ -18,7 +18,6 @@
 #include <linux/errno.h>
 #include <linux/wait.h>
 #include <linux/ptrace.h>
-#include <linux/compat.h>
 #include <linux/suspend.h>
 #include <linux/compiler.h>
 #include <linux/uaccess.h>
diff --git a/arch/mips/kernel/smp.c b/arch/mips/kernel/smp.c
index 04bbbd8d91ab..73b0dab02668 100644
--- a/arch/mips/kernel/smp.c
+++ b/arch/mips/kernel/smp.c
@@ -194,6 +194,61 @@ void smp_call_function_interrupt(void)
         }
 }
 
+int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
+                             int retry, int wait)
+{
+        struct call_data_struct data;
+        int me;
+
+        /*
+         * Can die spectacularly if this CPU isn't yet marked online
+         */
+        if (!cpu_online(cpu))
+                return 0;
+
+        me = get_cpu();
+        BUG_ON(!cpu_online(me));
+
+        if (cpu == me) {
+                local_irq_disable();
+                func(info);
+                local_irq_enable();
+                put_cpu();
+                return 0;
+        }
+
+        /* Can deadlock when called with interrupts disabled */
+        WARN_ON(irqs_disabled());
+
+        data.func = func;
+        data.info = info;
+        atomic_set(&data.started, 0);
+        data.wait = wait;
+        if (wait)
+                atomic_set(&data.finished, 0);
+
+        spin_lock(&smp_call_lock);
+        call_data = &data;
+        smp_mb();
+
+        /* Send a message to the other CPU */
+        core_send_ipi(cpu, SMP_CALL_FUNCTION);
+
+        /* Wait for response */
+        /* FIXME: lock-up detection, backtrace on lock-up */
+        while (atomic_read(&data.started) != 1)
+                barrier();
+
+        if (wait)
+                while (atomic_read(&data.finished) != 1)
+                        barrier();
+        call_data = NULL;
+        spin_unlock(&smp_call_lock);
+
+        put_cpu();
+        return 0;
+}
+
 static void stop_this_cpu(void *dummy)
 {
         /*
diff --git a/arch/mips/kernel/smtc.c b/arch/mips/kernel/smtc.c
index 342d873b2ecc..16aa5d37117c 100644
--- a/arch/mips/kernel/smtc.c
+++ b/arch/mips/kernel/smtc.c
@@ -86,25 +86,11 @@ unsigned int smtc_status = 0;
 
 /* Boot command line configuration overrides */
 
-static int vpelimit = 0;
-static int tclimit = 0;
 static int ipibuffers = 0;
 static int nostlb = 0;
 static int asidmask = 0;
 unsigned long smtc_asid_mask = 0xff;
 
-static int __init maxvpes(char *str)
-{
-        get_option(&str, &vpelimit);
-        return 1;
-}
-
-static int __init maxtcs(char *str)
-{
-        get_option(&str, &tclimit);
-        return 1;
-}
-
 static int __init ipibufs(char *str)
 {
         get_option(&str, &ipibuffers);
@@ -137,8 +123,6 @@ static int __init asidmask_set(char *str)
         return 1;
 }
 
-__setup("maxvpes=", maxvpes);
-__setup("maxtcs=", maxtcs);
 __setup("ipibufs=", ipibufs);
 __setup("nostlb", stlb_disable);
 __setup("asidmask=", asidmask_set);
@@ -168,9 +152,9 @@ static int __init tintq(char *str)
 
 __setup("tintq=", tintq);
 
-int imstuckcount[2][8];
+static int imstuckcount[2][8];
 /* vpemask represents IM/IE bits of per-VPE Status registers, low-to-high */
-int vpemask[2][8] = {
+static int vpemask[2][8] = {
         {0, 0, 1, 0, 0, 0, 0, 1},
         {0, 0, 0, 0, 0, 0, 0, 1}
 };
@@ -540,7 +524,7 @@ void mipsmt_prepare_cpus(void)
  * (unsigned long)idle->thread_info the gp
  *
  */
-void smtc_boot_secondary(int cpu, struct task_struct *idle)
+void __cpuinit smtc_boot_secondary(int cpu, struct task_struct *idle)
 {
         extern u32 kernelsp[NR_CPUS];
         long flags;
@@ -876,7 +860,7 @@ void deferred_smtc_ipi(void)
  * Send clock tick to all TCs except the one executing the funtion
  */
 
-void smtc_timer_broadcast(int vpe)
+void smtc_timer_broadcast(void)
 {
         int cpu;
         int myTC = cpu_data[smp_processor_id()].tc_id;
@@ -975,7 +959,12 @@ static void ipi_irq_dispatch(void)
         do_IRQ(cpu_ipi_irq);
 }
 
-static struct irqaction irq_ipi;
+static struct irqaction irq_ipi = {
+        .handler        = ipi_interrupt,
+        .flags          = IRQF_DISABLED,
+        .name           = "SMTC_IPI",
+        .flags          = IRQF_PERCPU
+};
 
 static void setup_cross_vpe_interrupts(unsigned int nvpe)
 {
@@ -987,13 +976,8 @@ static void setup_cross_vpe_interrupts(unsigned int nvpe)
 
         set_vi_handler(MIPS_CPU_IPI_IRQ, ipi_irq_dispatch);
 
-        irq_ipi.handler = ipi_interrupt;
-        irq_ipi.flags = IRQF_DISABLED;
-        irq_ipi.name = "SMTC_IPI";
-
         setup_irq_smtc(cpu_ipi_irq, &irq_ipi, (0x100 << MIPS_CPU_IPI_IRQ));
 
-        irq_desc[cpu_ipi_irq].status |= IRQ_PER_CPU;
         set_irq_handler(cpu_ipi_irq, handle_percpu_irq);
 }
 
diff --git a/arch/mips/kernel/syscall.c b/arch/mips/kernel/syscall.c
index 541b5005957e..7c800ec3ff55 100644
--- a/arch/mips/kernel/syscall.c
+++ b/arch/mips/kernel/syscall.c
@@ -281,16 +281,24 @@ asmlinkage int sys_set_thread_area(unsigned long addr)
 
 asmlinkage int _sys_sysmips(int cmd, long arg1, int arg2, int arg3)
 {
-        int     tmp;
-
-        switch(cmd) {
+        switch (cmd) {
         case MIPS_ATOMIC_SET:
                 printk(KERN_CRIT "How did I get here?\n");
                 return -EINVAL;
 
         case MIPS_FIXADE:
-                tmp = current->thread.mflags & ~3;
-                current->thread.mflags = tmp | (arg1 & 3);
+                if (arg1 & ~3)
+                        return -EINVAL;
+
+                if (arg1 & 1)
+                        set_thread_flag(TIF_FIXADE);
+                else
+                        clear_thread_flag(TIF_FIXADE);
+                if (arg1 & 2)
+                        set_thread_flag(TIF_LOGADE);
+                else
+                        clear_thread_flag(TIF_FIXADE);
+
                 return 0;
 
         case FLUSH_CACHE:
diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c
index ce277cb34dd0..c8e291c83057 100644
--- a/arch/mips/kernel/traps.c
+++ b/arch/mips/kernel/traps.c
@@ -775,7 +775,7 @@ static void mt_ase_fp_affinity(void)
                         cpus_and(tmask, current->thread.user_cpus_allowed,
                                  mt_fpu_cpumask);
                         set_cpus_allowed(current, tmask);
-                        current->thread.mflags |= MF_FPUBOUND;
+                        set_thread_flag(TIF_FPUBOUND);
                 }
         }
 #endif /* CONFIG_MIPS_MT_FPAFF */
diff --git a/arch/mips/kernel/unaligned.c b/arch/mips/kernel/unaligned.c
index 8b9c34ffae18..d34b1fb3665d 100644
--- a/arch/mips/kernel/unaligned.c
+++ b/arch/mips/kernel/unaligned.c
@@ -101,16 +101,14 @@ static u32 unaligned_action;
 #endif
 extern void show_registers(struct pt_regs *regs);
 
-static inline int emulate_load_store_insn(struct pt_regs *regs,
-        void __user *addr, unsigned int __user *pc,
-        unsigned long **regptr, unsigned long *newvalue)
+static void emulate_load_store_insn(struct pt_regs *regs,
+        void __user *addr, unsigned int __user *pc)
 {
         union mips_instruction insn;
         unsigned long value;
         unsigned int res;
 
         regs->regs[0] = 0;
-        *regptr=NULL;
 
         /*
          * This load never faults.
@@ -179,8 +177,8 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
                         : "r" (addr), "i" (-EFAULT));
                 if (res)
                         goto fault;
-                *newvalue = value;
-                *regptr = &regs->regs[insn.i_format.rt];
+                compute_return_epc(regs);
+                regs->regs[insn.i_format.rt] = value;
                 break;
 
         case lw_op:
@@ -209,8 +207,8 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
                         : "r" (addr), "i" (-EFAULT));
                 if (res)
                         goto fault;
-                *newvalue = value;
-                *regptr = &regs->regs[insn.i_format.rt];
+                compute_return_epc(regs);
+                regs->regs[insn.i_format.rt] = value;
                 break;
 
         case lhu_op:
@@ -243,8 +241,8 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
                         : "r" (addr), "i" (-EFAULT));
                 if (res)
                         goto fault;
-                *newvalue = value;
-                *regptr = &regs->regs[insn.i_format.rt];
+                compute_return_epc(regs);
+                regs->regs[insn.i_format.rt] = value;
                 break;
 
         case lwu_op:
@@ -283,8 +281,8 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
                         : "r" (addr), "i" (-EFAULT));
                 if (res)
                         goto fault;
-                *newvalue = value;
-                *regptr = &regs->regs[insn.i_format.rt];
+                compute_return_epc(regs);
+                regs->regs[insn.i_format.rt] = value;
                 break;
 #endif /* CONFIG_64BIT */
 
@@ -325,8 +323,8 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
                         : "r" (addr), "i" (-EFAULT));
                 if (res)
                         goto fault;
-                *newvalue = value;
-                *regptr = &regs->regs[insn.i_format.rt];
+                compute_return_epc(regs);
+                regs->regs[insn.i_format.rt] = value;
                 break;
 #endif /* CONFIG_64BIT */
 
@@ -367,6 +365,7 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
                         : "r" (value), "r" (addr), "i" (-EFAULT));
                 if (res)
                         goto fault;
+                compute_return_epc(regs);
                 break;
 
         case sw_op:
@@ -397,6 +396,7 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
                 : "r" (value), "r" (addr), "i" (-EFAULT));
                 if (res)
                         goto fault;
+                compute_return_epc(regs);
                 break;
 
         case sd_op:
@@ -435,6 +435,7 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
                 : "r" (value), "r" (addr), "i" (-EFAULT));
                 if (res)
                         goto fault;
+                compute_return_epc(regs);
                 break;
 #endif /* CONFIG_64BIT */
 
@@ -473,34 +474,31 @@ static inline int emulate_load_store_insn(struct pt_regs *regs,
         unaligned_instructions++;
 #endif
 
-        return 0;
+        return;
 
 fault:
         /* Did we have an exception handler installed? */
         if (fixup_exception(regs))
-                return 1;
+                return;
 
         die_if_kernel ("Unhandled kernel unaligned access", regs);
         send_sig(SIGSEGV, current, 1);
 
-        return 0;
+        return;
 
 sigbus:
         die_if_kernel("Unhandled kernel unaligned access", regs);
         send_sig(SIGBUS, current, 1);
 
-        return 0;
+        return;
 
 sigill:
         die_if_kernel("Unhandled kernel unaligned access or invalid instruction", regs);
         send_sig(SIGILL, current, 1);
-
-        return 0;
 }
 
 asmlinkage void do_ade(struct pt_regs *regs)
 {
-        unsigned long *regptr, newval;
         extern int do_dsemulret(struct pt_regs *);
         unsigned int __user *pc;
         mm_segment_t seg;
@@ -524,7 +522,7 @@ asmlinkage void do_ade(struct pt_regs *regs)
                 goto sigbus;
 
         pc = (unsigned int __user *) exception_epc(regs);
-        if (user_mode(regs) && (current->thread.mflags & MF_FIXADE) == 0)
+        if (user_mode(regs) && !test_thread_flag(TIF_FIXADE))
                 goto sigbus;
         if (unaligned_action == UNALIGNED_ACTION_SIGNAL)
                 goto sigbus;
@@ -538,16 +536,7 @@ asmlinkage void do_ade(struct pt_regs *regs)
         seg = get_fs();
         if (!user_mode(regs))
                 set_fs(KERNEL_DS);
-        if (!emulate_load_store_insn(regs, (void __user *)regs->cp0_badvaddr, pc,
-                                     &regptr, &newval)) {
-                compute_return_epc(regs);
-                /*
-                 * Now that branch is evaluated, update the dest
-                 * register if necessary
-                 */
-                if (regptr)
-                        *regptr = newval;
-        }
+        emulate_load_store_insn(regs, (void __user *)regs->cp0_badvaddr, pc);
         set_fs(seg);
 
         return;
diff --git a/arch/mips/kernel/vpe.c b/arch/mips/kernel/vpe.c
index a2bee10f04cf..3c09b9785f4c 100644
--- a/arch/mips/kernel/vpe.c
+++ b/arch/mips/kernel/vpe.c
@@ -27,7 +27,6 @@
  * To load and run, simply cat a SP 'program file' to /dev/vpe1.
  * i.e cat spapp >/dev/vpe1.
  */
-
 #include <linux/kernel.h>
 #include <linux/device.h>
 #include <linux/module.h>
@@ -54,6 +53,7 @@
 #include <asm/system.h>
 #include <asm/vpe.h>
 #include <asm/kspd.h>
+#include <asm/mips_mt.h>
 
 typedef void *vpe_handle;
 
@@ -64,6 +64,10 @@ typedef void *vpe_handle;
 /* If this is set, the section belongs in the init part of the module */
 #define INIT_OFFSET_MASK (1UL << (BITS_PER_LONG-1))
 
+/*
+ * The number of TCs and VPEs physically available on the core
+ */
+static int hw_tcs, hw_vpes;
 static char module_name[] = "vpe";
 static int major;
 static const int minor = 1;     /* fixed for now  */
@@ -126,20 +130,17 @@ struct vpe {
 
         /* the list of who wants to know when something major happens */
         struct list_head notify;
+
+        unsigned int ntcs;
 };
 
 struct tc {
         enum tc_state state;
         int index;
 
-        /* parent VPE */
-        struct vpe *pvpe;
-
-        /* The list of TC's with this VPE */
-        struct list_head tc;
-
-        /* The global list of tc's */
-        struct list_head list;
+        struct vpe *pvpe;       /* parent VPE */
+        struct list_head tc;    /* The list of TC's with this VPE */
+        struct list_head list;  /* The global list of tc's */
 };
 
 struct {
@@ -217,18 +218,17 @@ struct vpe *alloc_vpe(int minor)
 /* allocate a tc. At startup only tc0 is running, all other can be halted. */
 struct tc *alloc_tc(int index)
 {
-        struct tc *t;
+        struct tc *tc;
 
-        if ((t = kzalloc(sizeof(struct tc), GFP_KERNEL)) == NULL) {
-                return NULL;
-        }
-
-        INIT_LIST_HEAD(&t->tc);
-        list_add_tail(&t->list, &vpecontrol.tc_list);
+        if ((tc = kzalloc(sizeof(struct tc), GFP_KERNEL)) == NULL)
+                goto out;
 
-        t->index = index;
+        INIT_LIST_HEAD(&tc->tc);
+        tc->index = index;
+        list_add_tail(&tc->list, &vpecontrol.tc_list);
 
-        return t;
+out:
+        return tc;
 }
 
 /* clean up and free everything */
@@ -663,66 +663,48 @@ static void dump_elfsymbols(Elf_Shdr * sechdrs, unsigned int symindex,
 }
 #endif
 
-static void dump_tc(struct tc *t)
-{
-        unsigned long val;
-
-        settc(t->index);
-        printk(KERN_DEBUG "VPE loader: TC index %d targtc %ld "
-               "TCStatus 0x%lx halt 0x%lx\n",
-               t->index, read_c0_vpecontrol() & VPECONTROL_TARGTC,
-               read_tc_c0_tcstatus(), read_tc_c0_tchalt());
-
-        printk(KERN_DEBUG " tcrestart 0x%lx\n", read_tc_c0_tcrestart());
-        printk(KERN_DEBUG " tcbind 0x%lx\n", read_tc_c0_tcbind());
-
-        val = read_c0_vpeconf0();
-        printk(KERN_DEBUG " VPEConf0 0x%lx MVP %ld\n", val,
-               (val & VPECONF0_MVP) >> VPECONF0_MVP_SHIFT);
-
-        printk(KERN_DEBUG " c0 status 0x%lx\n", read_vpe_c0_status());
-        printk(KERN_DEBUG " c0 cause 0x%lx\n", read_vpe_c0_cause());
-
-        printk(KERN_DEBUG " c0 badvaddr 0x%lx\n", read_vpe_c0_badvaddr());
-        printk(KERN_DEBUG " c0 epc 0x%lx\n", read_vpe_c0_epc());
-}
-
-static void dump_tclist(void)
-{
-        struct tc *t;
-
-        list_for_each_entry(t, &vpecontrol.tc_list, list) {
-                dump_tc(t);
-        }
-}
-
 /* We are prepared so configure and start the VPE... */
 static int vpe_run(struct vpe * v)
 {
+        unsigned long flags, val, dmt_flag;
         struct vpe_notifications *n;
-        unsigned long val, dmt_flag;
+        unsigned int vpeflags;
         struct tc *t;
 
         /* check we are the Master VPE */
+        local_irq_save(flags);
         val = read_c0_vpeconf0();
         if (!(val & VPECONF0_MVP)) {
                 printk(KERN_WARNING
                        "VPE loader: only Master VPE's are allowed to configure MT\n");
+                local_irq_restore(flags);
+
                 return -1;
         }
 
-        /* disable MT (using dvpe) */
-        dvpe();
+        dmt_flag = dmt();
+        vpeflags = dvpe();
 
         if (!list_empty(&v->tc)) {
                 if ((t = list_entry(v->tc.next, struct tc, tc)) == NULL) {
-                        printk(KERN_WARNING "VPE loader: TC %d is already in use.\n",
-                               t->index);
+                        evpe(vpeflags);
+                        emt(dmt_flag);
+                        local_irq_restore(flags);
+
+                        printk(KERN_WARNING
+                               "VPE loader: TC %d is already in use.\n",
+                               t->index);
                         return -ENOEXEC;
                 }
         } else {
-                printk(KERN_WARNING "VPE loader: No TC's associated with VPE %d\n",
+                evpe(vpeflags);
+                emt(dmt_flag);
+                local_irq_restore(flags);
+
+                printk(KERN_WARNING
+                       "VPE loader: No TC's associated with VPE %d\n",
                        v->minor);
+
                 return -ENOEXEC;
         }
 
@@ -733,21 +715,20 @@ static int vpe_run(struct vpe * v)
 
         /* should check it is halted, and not activated */
         if ((read_tc_c0_tcstatus() & TCSTATUS_A) || !(read_tc_c0_tchalt() & TCHALT_H)) {
-                printk(KERN_WARNING "VPE loader: TC %d is already doing something!\n",
+                evpe(vpeflags);
+                emt(dmt_flag);
+                local_irq_restore(flags);
+
+                printk(KERN_WARNING "VPE loader: TC %d is already active!\n",
                        t->index);
-                dump_tclist();
+
                 return -ENOEXEC;
         }
 
-        /*
-         * Disable multi-threaded execution whilst we activate, clear the
-         * halt bit and bound the tc to the other VPE...
-         */
-        dmt_flag = dmt();
-
         /* Write the address we want it to start running from in the TCPC register. */
         write_tc_c0_tcrestart((unsigned long)v->__start);
         write_tc_c0_tccontext((unsigned long)0);
+
         /*
          * Mark the TC as activated, not interrupt exempt and not dynamically
          * allocatable
@@ -763,15 +744,15 @@ static int vpe_run(struct vpe * v)
          * here...  Or set $a3 to zero and define DFLT_STACK_SIZE and
          * DFLT_HEAP_SIZE when you compile your program
          */
-        mttgpr(7, physical_memsize);
-
+        mttgpr(6, v->ntcs);
+        mttgpr(7, physical_memsize);
 
         /* set up VPE1 */
         /*
          * bind the TC to VPE 1 as late as possible so we only have the final
          * VPE registers to set up, and so an EJTAG probe can trigger on it
          */
-        write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | v->minor);
+        write_tc_c0_tcbind((read_tc_c0_tcbind() & ~TCBIND_CURVPE) | 1);
 
         write_vpe_c0_vpeconf0(read_vpe_c0_vpeconf0() & ~(VPECONF0_VPA));
 
@@ -793,15 +774,16 @@ static int vpe_run(struct vpe * v)
         /* take system out of configuration state */
         clear_c0_mvpcontrol(MVPCONTROL_VPC);
 
-        /* now safe to re-enable multi-threading */
-        emt(dmt_flag);
-
-        /* set it running */
+#ifdef CONFIG_SMP
         evpe(EVPE_ENABLE);
+#else
+        evpe(vpeflags);
+#endif
+        emt(dmt_flag);
+        local_irq_restore(flags);
 
-        list_for_each_entry(n, &v->notify, list) {
-                n->start(v->minor);
-        }
+        list_for_each_entry(n, &v->notify, list)
+                n->start(minor);
 
         return 0;
 }
@@ -1023,23 +1005,15 @@ static int vpe_elfload(struct vpe * v)
         return 0;
 }
 
-void __used dump_vpe(struct vpe * v)
-{
-        struct tc *t;
-
-        settc(v->minor);
-
-        printk(KERN_DEBUG "VPEControl 0x%lx\n", read_vpe_c0_vpecontrol());
-        printk(KERN_DEBUG "VPEConf0 0x%lx\n", read_vpe_c0_vpeconf0());
-
-        list_for_each_entry(t, &vpecontrol.tc_list, list)
-                dump_tc(t);
-}
-
 static void cleanup_tc(struct tc *tc)
 {
+        unsigned long flags;
+        unsigned int mtflags, vpflags;
         int tmp;
 
+        local_irq_save(flags);
+        mtflags = dmt();
+        vpflags = dvpe();
         /* Put MVPE's into 'configuration state' */
         set_c0_mvpcontrol(MVPCONTROL_VPC);
 
@@ -1054,9 +1028,12 @@ static void cleanup_tc(struct tc *tc)
         write_tc_c0_tchalt(TCHALT_H);
 
         /* bind it to anything other than VPE1 */
-        write_tc_c0_tcbind(read_tc_c0_tcbind() & ~TCBIND_CURVPE); // | TCBIND_CURVPE
+//      write_tc_c0_tcbind(read_tc_c0_tcbind() & ~TCBIND_CURVPE); // | TCBIND_CURVPE
 
         clear_c0_mvpcontrol(MVPCONTROL_VPC);
+        evpe(vpflags);
+        emt(mtflags);
+        local_irq_restore(flags);
 }
 
 static int getcwd(char *buff, int size)
@@ -1077,36 +1054,32 @@ static int getcwd(char *buff, int size)
 /* checks VPE is unused and gets ready to load program  */
 static int vpe_open(struct inode *inode, struct file *filp)
 {
-        int minor, ret;
         enum vpe_state state;
-        struct vpe *v;
         struct vpe_notifications *not;
+        struct vpe *v;
+        int ret;
 
-        /* assume only 1 device at the mo. */
-        if ((minor = iminor(inode)) != 1) {
+        if (minor != iminor(inode)) {
+                /* assume only 1 device at the moment. */
                 printk(KERN_WARNING "VPE loader: only vpe1 is supported\n");
                 return -ENODEV;
         }
 
-        if ((v = get_vpe(minor)) == NULL) {
+        if ((v = get_vpe(tclimit)) == NULL) {
                 printk(KERN_WARNING "VPE loader: unable to get vpe\n");
                 return -ENODEV;
         }
 
         state = xchg(&v->state, VPE_STATE_INUSE);
         if (state != VPE_STATE_UNUSED) {
-                dvpe();
-
                 printk(KERN_DEBUG "VPE loader: tc in use dumping regs\n");
 
-                dump_tc(get_tc(minor));
-
                 list_for_each_entry(not, &v->notify, list) {
-                        not->stop(minor);
+                        not->stop(tclimit);
                 }
 
                 release_progmem(v->load_addr);
-                cleanup_tc(get_tc(minor));
+                cleanup_tc(get_tc(tclimit));
         }
 
         /* this of-course trashes what was there before... */
@@ -1133,26 +1106,25 @@ static int vpe_open(struct inode *inode, struct file *filp)
 
         v->shared_ptr = NULL;
         v->__start = 0;
+
         return 0;
 }
 
 static int vpe_release(struct inode *inode, struct file *filp)
 {
-        int minor, ret = 0;
         struct vpe *v;
         Elf_Ehdr *hdr;
+        int ret = 0;
 
-        minor = iminor(inode);
-        if ((v = get_vpe(minor)) == NULL)
+        v = get_vpe(tclimit);
+        if (v == NULL)
                 return -ENODEV;
 
-        // simple case of fire and forget, so tell the VPE to run...
-
         hdr = (Elf_Ehdr *) v->pbuffer;
         if (memcmp(hdr->e_ident, ELFMAG, 4) == 0) {
-                if (vpe_elfload(v) >= 0)
+                if (vpe_elfload(v) >= 0) {
                         vpe_run(v);
-                else {
+                } else {
                         printk(KERN_WARNING "VPE loader: ELF load failed.\n");
                         ret = -ENOEXEC;
                 }
@@ -1179,12 +1151,14 @@ static int vpe_release(struct inode *inode, struct file *filp)
 static ssize_t vpe_write(struct file *file, const char __user * buffer,
                          size_t count, loff_t * ppos)
 {
-        int minor;
         size_t ret = count;
         struct vpe *v;
 
-        minor = iminor(file->f_path.dentry->d_inode);
-        if ((v = get_vpe(minor)) == NULL)
+        if (iminor(file->f_path.dentry->d_inode) != minor)
+                return -ENODEV;
+
+        v = get_vpe(tclimit);
+        if (v == NULL)
                 return -ENODEV;
 
         if (v->pbuffer == NULL) {
@@ -1366,62 +1340,173 @@ static void kspd_sp_exit( int sp_id)
 }
 #endif
 
-static struct device *vpe_dev;
+static ssize_t store_kill(struct class_device *dev, const char *buf, size_t len)
+{
+        struct vpe *vpe = get_vpe(tclimit);
+        struct vpe_notifications *not;
+
+        list_for_each_entry(not, &vpe->notify, list) {
+                not->stop(tclimit);
+        }
+
+        release_progmem(vpe->load_addr);
+        cleanup_tc(get_tc(tclimit));
+        vpe_stop(vpe);
+        vpe_free(vpe);
+
+        return len;
+}
+
+static ssize_t show_ntcs(struct class_device *cd, char *buf)
+{
+        struct vpe *vpe = get_vpe(tclimit);
+
+        return sprintf(buf, "%d\n", vpe->ntcs);
+}
+
+static ssize_t store_ntcs(struct class_device *dev, const char *buf, size_t len)
+{
+        struct vpe *vpe = get_vpe(tclimit);
+        unsigned long new;
+        char *endp;
+
+        new = simple_strtoul(buf, &endp, 0);
+        if (endp == buf)
+                goto out_einval;
+
+        if (new == 0 || new > (hw_tcs - tclimit))
+                goto out_einval;
+
+        vpe->ntcs = new;
+
+        return len;
+
+out_einval:
+        return -EINVAL;;
+}
+
+static struct class_device_attribute vpe_class_attributes[] = {
+        __ATTR(kill, S_IWUSR, NULL, store_kill),
+        __ATTR(ntcs, S_IRUGO | S_IWUSR, show_ntcs, store_ntcs),
+        {}
+};
+
+static void vpe_class_device_release(struct class_device *cd)
+{
+        kfree(cd);
+}
+
+struct class vpe_class = {
+        .name = "vpe",
+        .owner = THIS_MODULE,
+        .release = vpe_class_device_release,
+        .class_dev_attrs = vpe_class_attributes,
+};
+
+struct class_device vpe_device;
 
 static int __init vpe_module_init(void)
 {
+        unsigned int mtflags, vpflags;
+        unsigned long flags, val;
         struct vpe *v = NULL;
-        struct device *dev;
         struct tc *t;
-        unsigned long val;
-        int i, err;
+        int tc, err;
 
         if (!cpu_has_mipsmt) {
                 printk("VPE loader: not a MIPS MT capable processor\n");
                 return -ENODEV;
         }
 
+        if (vpelimit == 0) {
+                printk(KERN_WARNING "No VPEs reserved for AP/SP, not "
+                       "initializing VPE loader.\nPass maxvpes=<n> argument as "
+                       "kernel argument\n");
+
+                return -ENODEV;
+        }
+
+        if (tclimit == 0) {
+                printk(KERN_WARNING "No TCs reserved for AP/SP, not "
+                       "initializing VPE loader.\nPass maxtcs=<n> argument as "
+                       "kernel argument\n");
+
+                return -ENODEV;
+        }
+
         major = register_chrdev(0, module_name, &vpe_fops);
         if (major < 0) {
                 printk("VPE loader: unable to register character device\n");
                 return major;
         }
 
-        dev = device_create(mt_class, NULL, MKDEV(major, minor),
-                            "tc%d", minor);
-        if (IS_ERR(dev)) {
-                err = PTR_ERR(dev);
+        err = class_register(&vpe_class);
+        if (err) {
+                printk(KERN_ERR "vpe_class registration failed\n");
                 goto out_chrdev;
         }
-        vpe_dev = dev;
 
-        dmt();
-        dvpe();
+        class_device_initialize(&vpe_device);
+        vpe_device.class        = &vpe_class,
+        vpe_device.parent       = NULL,
+        strlcpy(vpe_device.class_id, "vpe1", BUS_ID_SIZE);
+        vpe_device.devt = MKDEV(major, minor);
+        err = class_device_add(&vpe_device);
+        if (err) {
+                printk(KERN_ERR "Adding vpe_device failed\n");
+                goto out_class;
+        }
+
+        local_irq_save(flags);
+        mtflags = dmt();
+        vpflags = dvpe();
 
         /* Put MVPE's into 'configuration state' */
         set_c0_mvpcontrol(MVPCONTROL_VPC);
 
         /* dump_mtregs(); */
 
-
         val = read_c0_mvpconf0();
-        for (i = 0; i < ((val & MVPCONF0_PTC) + 1); i++) {
-                t = alloc_tc(i);
+        hw_tcs = (val & MVPCONF0_PTC) + 1;
+        hw_vpes = ((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1;
+
+        for (tc = tclimit; tc < hw_tcs; tc++) {
+                /*
+                 * Must re-enable multithreading temporarily or in case we
+                 * reschedule send IPIs or similar we might hang.
+                 */
+                clear_c0_mvpcontrol(MVPCONTROL_VPC);
+                evpe(vpflags);
+                emt(mtflags);
+                local_irq_restore(flags);
+                t = alloc_tc(tc);
+                if (!t) {
+                        err = -ENOMEM;
+                        goto out;
+                }
+
+                local_irq_save(flags);
+                mtflags = dmt();
+                vpflags = dvpe();
+                set_c0_mvpcontrol(MVPCONTROL_VPC);
 
                 /* VPE's */
-                if (i < ((val & MVPCONF0_PVPE) >> MVPCONF0_PVPE_SHIFT) + 1) {
-                        settc(i);
+                if (tc < hw_tcs) {
+                        settc(tc);
 
-                        if ((v = alloc_vpe(i)) == NULL) {
+                        if ((v = alloc_vpe(tc)) == NULL) {
                                 printk(KERN_WARNING "VPE: unable to allocate VPE\n");
-                                return -ENODEV;
+
+                                goto out_reenable;
                         }
 
+                        v->ntcs = hw_tcs - tclimit;
+
                         /* add the tc to the list of this vpe's tc's. */
                         list_add(&t->tc, &v->tc);
 
                         /* deactivate all but vpe0 */
-                        if (i != 0) {
+                        if (tc >= tclimit) {
                                 unsigned long tmp = read_vpe_c0_vpeconf0();
 
                                 tmp &= ~VPECONF0_VPA;
@@ -1434,7 +1519,7 @@ static int __init vpe_module_init(void)
                         /* disable multi-threading with TC's */
                         write_vpe_c0_vpecontrol(read_vpe_c0_vpecontrol() & ~VPECONTROL_TE);
 
-                        if (i != 0) {
+                        if (tc >= vpelimit) {
                                 /*
                                  * Set config to be the same as vpe0,
                                  * particularly kseg0 coherency alg
@@ -1446,10 +1531,10 @@ static int __init vpe_module_init(void)
                 /* TC's */
                 t->pvpe = v;    /* set the parent vpe */
 
-                if (i != 0) {
+                if (tc >= tclimit) {
                         unsigned long tmp;
 
-                        settc(i);
+                        settc(tc);
 
                         /* Any TC that is bound to VPE0 gets left as is - in case
                            we are running SMTC on VPE0. A TC that is bound to any
@@ -1479,17 +1564,25 @@ static int __init vpe_module_init(void)
                 }
         }
 
+out_reenable:
         /* release config state */
         clear_c0_mvpcontrol(MVPCONTROL_VPC);
 
+        evpe(vpflags);
+        emt(mtflags);
+        local_irq_restore(flags);
+
 #ifdef CONFIG_MIPS_APSP_KSPD
         kspd_events.kspd_sp_exit = kspd_sp_exit;
 #endif
         return 0;
 
+out_class:
+        class_unregister(&vpe_class);
 out_chrdev:
         unregister_chrdev(major, module_name);
 
+out:
         return err;
 }
 
@@ -1503,7 +1596,7 @@ static void __exit vpe_module_exit(void)
                 }
         }
 
-        device_destroy(mt_class, MKDEV(major, minor));
+        class_device_del(&vpe_device);
         unregister_chrdev(major, module_name);
 }