From c275ce44929402664902cbb09d4f054b315623d7 Mon Sep 17 00:00:00 2001
From: Sam Ravnborg <sam@ravnborg.org>
Date: Sat, 17 Jan 2009 23:10:35 -0800
Subject: sparc64: fix readout of cpu/fpu type

Meelis reported that on his box /proc/cpuinfo started
to reported "Unknow CPU" and the same did the boot messages.

It was a stupid bug I introduced when merging
cpu.c for 32 and 64 bit.

The code did an array reference where it had to search
for the right index.

Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/cpu.c | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/cpu.c b/arch/sparc/kernel/cpu.c
index f0b825505da..32d32b4824f 100644
--- a/arch/sparc/kernel/cpu.c
+++ b/arch/sparc/kernel/cpu.c
@@ -239,14 +239,26 @@ unsigned int fsr_storage;
 
 static void set_cpu_and_fpu(int psr_impl, int psr_vers, int fpu_vers)
 {
+	const struct manufacturer_info *manuf;
+	int i;
+
 	sparc_cpu_type = NULL;
 	sparc_fpu_type = NULL;
-	if (psr_impl < ARRAY_SIZE(manufacturer_info))
+	manuf = NULL;
+
+	for (i = 0; i < ARRAY_SIZE(manufacturer_info); i++)
+	{
+		if (psr_impl == manufacturer_info[i].psr_impl) {
+			manuf = &manufacturer_info[i];
+			break;
+		}
+	}
+	if (manuf != NULL)
 	{
 		const struct cpu_info *cpu;
 		const struct fpu_info *fpu;
 
-		cpu = &manufacturer_info[psr_impl].cpu_info[0];
+		cpu = &manuf->cpu_info[0];
 		while (cpu->psr_vers != -1)
 		{
 			if (cpu->psr_vers == psr_vers) {
@@ -256,7 +268,7 @@ static void set_cpu_and_fpu(int psr_impl, int psr_vers, int fpu_vers)
 			}
 			cpu++;
 		}
-		fpu =  &manufacturer_info[psr_impl].fpu_info[0];
+		fpu =  &manuf->fpu_info[0];
 		while (fpu->fp_vers != -1)
 		{
 			if (fpu->fp_vers == fpu_vers) {
-- 
cgit v1.2.3


From b7c18c1b2636ecb9ad76759f99dac6efd441fa92 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Sun, 18 Jan 2009 22:42:15 -0800
Subject: sparc64: Initialize FHC/CLOCK LED platform_device 'id' field
 correctly.

There is only one clock board, so use -1 as the 'id' so we get just
the base name as the LED device name string.

There are multiple FHC boards potentially in a system so use the board
number as the 'id' value for that case.

Reported-by: Meelis Roos <mroos@linux.ee>
Tested-by: Meelis Roos <mroos@linux.ee>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/central.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/central.c b/arch/sparc/kernel/central.c
index 05f1c916db0..f3b5466c389 100644
--- a/arch/sparc/kernel/central.c
+++ b/arch/sparc/kernel/central.c
@@ -103,6 +103,7 @@ static int __devinit clock_board_probe(struct of_device *op,
 	p->leds_resource.name = "leds";
 
 	p->leds_pdev.name = "sunfire-clockboard-leds";
+	p->leds_pdev.id = -1;
 	p->leds_pdev.resource = &p->leds_resource;
 	p->leds_pdev.num_resources = 1;
 	p->leds_pdev.dev.parent = &op->dev;
@@ -197,6 +198,7 @@ static int __devinit fhc_probe(struct of_device *op,
 		p->leds_resource.name = "leds";
 
 		p->leds_pdev.name = "sunfire-fhc-leds";
+		p->leds_pdev.id = p->board_num;
 		p->leds_pdev.resource = &p->leds_resource;
 		p->leds_pdev.num_resources = 1;
 		p->leds_pdev.dev.parent = &op->dev;
-- 
cgit v1.2.3


From e42650196df34789c825fa83f8bb37a5d5e52c14 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Mon, 19 Jan 2009 21:11:27 -0800
Subject: sparc64: Annotate sparc64 specific syscalls with SYSCALL_DEFINEx()

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/sys_sparc_64.c | 48 +++++++++++++++++++---------------------
 arch/sparc/kernel/syscalls.S     |  2 +-
 arch/sparc/kernel/systbls.h      |  3 ---
 arch/sparc/kernel/systbls_64.S   | 16 +++++++-------
 4 files changed, 32 insertions(+), 37 deletions(-)

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/sys_sparc_64.c b/arch/sparc/kernel/sys_sparc_64.c
index 09058fc39e7..e2d102447a4 100644
--- a/arch/sparc/kernel/sys_sparc_64.c
+++ b/arch/sparc/kernel/sys_sparc_64.c
@@ -399,7 +399,7 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
 	}
 }
 
-asmlinkage unsigned long sparc_brk(unsigned long brk)
+SYSCALL_DEFINE1(sparc_brk, unsigned long, brk)
 {
 	/* People could try to be nasty and use ta 0x6d in 32bit programs */
 	if (test_thread_flag(TIF_32BIT) && brk >= STACK_TOP32)
@@ -415,7 +415,7 @@ asmlinkage unsigned long sparc_brk(unsigned long brk)
  * sys_pipe() is the normal C calling standard for creating
  * a pipe. It's not the way unix traditionally does this, though.
  */
-asmlinkage long sparc_pipe(struct pt_regs *regs)
+SYSCALL_DEFINE1(sparc_pipe_real, struct pt_regs *, regs)
 {
 	int fd[2];
 	int error;
@@ -435,8 +435,8 @@ out:
  * This is really horribly ugly.
  */
 
-asmlinkage long sys_ipc(unsigned int call, int first, unsigned long second,
-			unsigned long third, void __user *ptr, long fifth)
+SYSCALL_DEFINE6(ipc, unsigned int, call, int, first, unsigned long, second,
+		unsigned long, third, void __user *, ptr, long, fifth)
 {
 	long err;
 
@@ -519,7 +519,7 @@ out:
 	return err;
 }
 
-asmlinkage long sparc64_newuname(struct new_utsname __user *name)
+SYSCALL_DEFINE1(sparc64_newuname, struct new_utsname __user *, name)
 {
 	int ret = sys_newuname(name);
 	
@@ -530,7 +530,7 @@ asmlinkage long sparc64_newuname(struct new_utsname __user *name)
 	return ret;
 }
 
-asmlinkage long sparc64_personality(unsigned long personality)
+SYSCALL_DEFINE1(sparc64_personality, unsigned long, personality)
 {
 	int ret;
 
@@ -564,9 +564,9 @@ int sparc_mmap_check(unsigned long addr, unsigned long len)
 }
 
 /* Linux version of mmap */
-asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
-	unsigned long prot, unsigned long flags, unsigned long fd,
-	unsigned long off)
+SYSCALL_DEFINE6(mmap, unsigned long, addr, unsigned long, len,
+		unsigned long, prot, unsigned long, flags, unsigned long, fd,
+		unsigned long, off)
 {
 	struct file * file = NULL;
 	unsigned long retval = -EBADF;
@@ -589,7 +589,7 @@ out:
 	return retval;
 }
 
-asmlinkage long sys64_munmap(unsigned long addr, size_t len)
+SYSCALL_DEFINE2(64_munmap, unsigned long, addr, size_t, len)
 {
 	long ret;
 
@@ -606,9 +606,9 @@ extern unsigned long do_mremap(unsigned long addr,
 	unsigned long old_len, unsigned long new_len,
 	unsigned long flags, unsigned long new_addr);
                 
-asmlinkage unsigned long sys64_mremap(unsigned long addr,
-	unsigned long old_len, unsigned long new_len,
-	unsigned long flags, unsigned long new_addr)
+SYSCALL_DEFINE5(64_mremap, unsigned long, addr,	unsigned long, old_len,
+		unsigned long, new_len, unsigned long, flags,
+		unsigned long, new_addr)
 {
 	unsigned long ret = -EINVAL;
 
@@ -671,7 +671,7 @@ asmlinkage void sparc_breakpoint(struct pt_regs *regs)
 
 extern void check_pending(int signum);
 
-asmlinkage long sys_getdomainname(char __user *name, int len)
+SYSCALL_DEFINE2(getdomainname, char __user *, name, int, len)
 {
         int nlen, err;
 
@@ -694,11 +694,10 @@ out:
 	return err;
 }
 
-asmlinkage long sys_utrap_install(utrap_entry_t type,
-				  utrap_handler_t new_p,
-				  utrap_handler_t new_d,
-				  utrap_handler_t __user *old_p,
-				  utrap_handler_t __user *old_d)
+SYSCALL_DEFINE5(utrap_install, utrap_entry_t, type,
+		utrap_handler_t, new_p, utrap_handler_t, new_d,
+		utrap_handler_t __user *, old_p,
+		utrap_handler_t __user *, old_d)
 {
 	if (type < UT_INSTRUCTION_EXCEPTION || type > UT_TRAP_INSTRUCTION_31)
 		return -EINVAL;
@@ -764,11 +763,9 @@ asmlinkage long sparc_memory_ordering(unsigned long model,
 	return 0;
 }
 
-asmlinkage long sys_rt_sigaction(int sig,
-				 const struct sigaction __user *act,
-				 struct sigaction __user *oact,
-				 void __user *restorer,
-				 size_t sigsetsize)
+SYSCALL_DEFINE5(rt_sigaction, int, sig, const struct sigaction __user *, act,
+		struct sigaction __user *, oact, void __user *, restorer,
+		size_t, sigsetsize)
 {
 	struct k_sigaction new_ka, old_ka;
 	int ret;
@@ -808,7 +805,8 @@ asmlinkage void update_perfctrs(void)
 	reset_pic();
 }
 
-asmlinkage long sys_perfctr(int opcode, unsigned long arg0, unsigned long arg1, unsigned long arg2)
+SYSCALL_DEFINE4(perfctr, int, opcode, unsigned long, arg0,
+		unsigned long, arg1, unsigned long, arg2)
 {
 	int err = 0;
 
diff --git a/arch/sparc/kernel/syscalls.S b/arch/sparc/kernel/syscalls.S
index 87f5a3b8a25..d150c2aa98d 100644
--- a/arch/sparc/kernel/syscalls.S
+++ b/arch/sparc/kernel/syscalls.S
@@ -21,7 +21,7 @@ execve_merge:
 
 	.align	32
 sys_sparc_pipe:
-	ba,pt	%xcc, sparc_pipe
+	ba,pt	%xcc, sys_sparc_pipe_real
 	 add	%sp, PTREGS_OFF, %o0
 sys_nis_syscall:
 	ba,pt	%xcc, c_sys_nis_syscall
diff --git a/arch/sparc/kernel/systbls.h b/arch/sparc/kernel/systbls.h
index bc9f5dac406..15c2d752b2b 100644
--- a/arch/sparc/kernel/systbls.h
+++ b/arch/sparc/kernel/systbls.h
@@ -16,9 +16,6 @@ extern asmlinkage long sys_ipc(unsigned int call, int first,
 			       void __user *ptr, long fifth);
 extern asmlinkage long sparc64_newuname(struct new_utsname __user *name);
 extern asmlinkage long sparc64_personality(unsigned long personality);
-extern asmlinkage unsigned long sys_mmap(unsigned long addr, unsigned long len,
-					 unsigned long prot, unsigned long flags,
-					 unsigned long fd, unsigned long off);
 extern asmlinkage long sys64_munmap(unsigned long addr, size_t len);
 extern asmlinkage unsigned long sys64_mremap(unsigned long addr,
 					     unsigned long old_len,
diff --git a/arch/sparc/kernel/systbls_64.S b/arch/sparc/kernel/systbls_64.S
index e6007bb3704..f93c42a2b52 100644
--- a/arch/sparc/kernel/systbls_64.S
+++ b/arch/sparc/kernel/systbls_64.S
@@ -21,7 +21,7 @@ sys_call_table32:
 /*0*/	.word sys_restart_syscall, sys32_exit, sys_fork, sys_read, sys_write
 /*5*/	.word sys32_open, sys_close, sys32_wait4, sys32_creat, sys_link
 /*10*/  .word sys_unlink, sunos_execv, sys_chdir, sys_chown16, sys32_mknod
-/*15*/	.word sys_chmod, sys_lchown16, sparc_brk, sys32_perfctr, sys32_lseek
+/*15*/	.word sys_chmod, sys_lchown16, sys_sparc_brk, sys32_perfctr, sys32_lseek
 /*20*/	.word sys_getpid, sys_capget, sys_capset, sys_setuid16, sys_getuid16
 /*25*/	.word sys32_vmsplice, compat_sys_ptrace, sys_alarm, sys32_sigaltstack, sys_pause
 /*30*/	.word compat_sys_utime, sys_lchown, sys_fchown, sys32_access, sys32_nice
@@ -55,8 +55,8 @@ sys_call_table32:
 /*170*/	.word sys32_lsetxattr, sys32_fsetxattr, sys_getxattr, sys_lgetxattr, compat_sys_getdents
 	.word sys_setsid, sys_fchdir, sys32_fgetxattr, sys_listxattr, sys_llistxattr
 /*180*/	.word sys32_flistxattr, sys_removexattr, sys_lremovexattr, compat_sys_sigpending, sys_ni_syscall
-	.word sys32_setpgid, sys32_fremovexattr, sys32_tkill, sys32_exit_group, sparc64_newuname
-/*190*/	.word sys32_init_module, sparc64_personality, sys_remap_file_pages, sys32_epoll_create, sys32_epoll_ctl
+	.word sys32_setpgid, sys32_fremovexattr, sys32_tkill, sys32_exit_group, sys_sparc64_newuname
+/*190*/	.word sys32_init_module, sys_sparc64_personality, sys_remap_file_pages, sys32_epoll_create, sys32_epoll_ctl
 	.word sys32_epoll_wait, sys32_ioprio_set, sys_getppid, sys32_sigaction, sys_sgetmask
 /*200*/	.word sys32_ssetmask, sys_sigsuspend, compat_sys_newlstat, sys_uselib, compat_sys_old_readdir
 	.word sys32_readahead, sys32_socketcall, sys32_syslog, sys32_lookup_dcookie, sys32_fadvise64
@@ -95,7 +95,7 @@ sys_call_table:
 /*0*/	.word sys_restart_syscall, sparc_exit, sys_fork, sys_read, sys_write
 /*5*/	.word sys_open, sys_close, sys_wait4, sys_creat, sys_link
 /*10*/  .word sys_unlink, sys_nis_syscall, sys_chdir, sys_chown, sys_mknod
-/*15*/	.word sys_chmod, sys_lchown, sparc_brk, sys_perfctr, sys_lseek
+/*15*/	.word sys_chmod, sys_lchown, sys_sparc_brk, sys_perfctr, sys_lseek
 /*20*/	.word sys_getpid, sys_capget, sys_capset, sys_setuid, sys_getuid
 /*25*/	.word sys_vmsplice, sys_ptrace, sys_alarm, sys_sigaltstack, sys_nis_syscall
 /*30*/	.word sys_utime, sys_nis_syscall, sys_nis_syscall, sys_access, sys_nice
@@ -106,7 +106,7 @@ sys_call_table:
 	.word sys_reboot, sys_nis_syscall, sys_symlink, sys_readlink, sys_execve
 /*60*/	.word sys_umask, sys_chroot, sys_newfstat, sys_fstat64, sys_getpagesize
 	.word sys_msync, sys_vfork, sys_pread64, sys_pwrite64, sys_nis_syscall
-/*70*/	.word sys_nis_syscall, sys_mmap, sys_nis_syscall, sys64_munmap, sys_mprotect
+/*70*/	.word sys_nis_syscall, sys_mmap, sys_nis_syscall, sys_64_munmap, sys_mprotect
 	.word sys_madvise, sys_vhangup, sys_nis_syscall, sys_mincore, sys_getgroups
 /*80*/	.word sys_setgroups, sys_getpgrp, sys_nis_syscall, sys_setitimer, sys_nis_syscall
 	.word sys_swapon, sys_getitimer, sys_nis_syscall, sys_sethostname, sys_nis_syscall
@@ -129,8 +129,8 @@ sys_call_table:
 /*170*/	.word sys_lsetxattr, sys_fsetxattr, sys_getxattr, sys_lgetxattr, sys_getdents
 	.word sys_setsid, sys_fchdir, sys_fgetxattr, sys_listxattr, sys_llistxattr
 /*180*/	.word sys_flistxattr, sys_removexattr, sys_lremovexattr, sys_nis_syscall, sys_ni_syscall
-	.word sys_setpgid, sys_fremovexattr, sys_tkill, sys_exit_group, sparc64_newuname
-/*190*/	.word sys_init_module, sparc64_personality, sys_remap_file_pages, sys_epoll_create, sys_epoll_ctl
+	.word sys_setpgid, sys_fremovexattr, sys_tkill, sys_exit_group, sys_sparc64_newuname
+/*190*/	.word sys_init_module, sys_sparc64_personality, sys_remap_file_pages, sys_epoll_create, sys_epoll_ctl
 	.word sys_epoll_wait, sys_ioprio_set, sys_getppid, sys_nis_syscall, sys_sgetmask
 /*200*/	.word sys_ssetmask, sys_nis_syscall, sys_newlstat, sys_uselib, sys_nis_syscall
 	.word sys_readahead, sys_socketcall, sys_syslog, sys_lookup_dcookie, sys_fadvise64
@@ -142,7 +142,7 @@ sys_call_table:
 	.word sys_fstatfs64, sys_llseek, sys_mlock, sys_munlock, sys_mlockall
 /*240*/	.word sys_munlockall, sys_sched_setparam, sys_sched_getparam, sys_sched_setscheduler, sys_sched_getscheduler
 	.word sys_sched_yield, sys_sched_get_priority_max, sys_sched_get_priority_min, sys_sched_rr_get_interval, sys_nanosleep
-/*250*/	.word sys64_mremap, sys_sysctl, sys_getsid, sys_fdatasync, sys_nfsservctl
+/*250*/	.word sys_64_mremap, sys_sysctl, sys_getsid, sys_fdatasync, sys_nfsservctl
 	.word sys_sync_file_range, sys_clock_settime, sys_clock_gettime, sys_clock_getres, sys_clock_nanosleep
 /*260*/	.word sys_sched_getaffinity, sys_sched_setaffinity, sys_timer_settime, sys_timer_gettime, sys_timer_getoverrun
 	.word sys_timer_delete, sys_timer_create, sys_ni_syscall, sys_io_setup, sys_io_destroy
-- 
cgit v1.2.3


From fcd26f7ae2ea5889134e8b3d60a42ce8b993c95f Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Mon, 19 Jan 2009 22:44:04 -0800
Subject: sparc64: Fix DAX handling via userspace access from kernel.

If we do a userspace access from kernel mode, and get a
data access exception, we need to check the exception
table just like a normal fault does.

The spitfire DAX handler was doing this, but such logic
was missing from the sun4v DAX code.

Reported-by: Dennis Gilmore <dgilmore@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/traps_64.c | 17 ++++++++++++++++-
 1 file changed, 16 insertions(+), 1 deletion(-)

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/traps_64.c b/arch/sparc/kernel/traps_64.c
index c2d153d4658..d809c4ebb48 100644
--- a/arch/sparc/kernel/traps_64.c
+++ b/arch/sparc/kernel/traps_64.c
@@ -1,6 +1,6 @@
 /* arch/sparc64/kernel/traps.c
  *
- * Copyright (C) 1995,1997,2008 David S. Miller (davem@davemloft.net)
+ * Copyright (C) 1995,1997,2008,2009 David S. Miller (davem@davemloft.net)
  * Copyright (C) 1997,1999,2000 Jakub Jelinek (jakub@redhat.com)
  */
 
@@ -314,6 +314,21 @@ void sun4v_data_access_exception(struct pt_regs *regs, unsigned long addr, unsig
 		return;
 
 	if (regs->tstate & TSTATE_PRIV) {
+		/* Test if this comes from uaccess places. */
+		const struct exception_table_entry *entry;
+
+		entry = search_exception_tables(regs->tpc);
+		if (entry) {
+			/* Ouch, somebody is trying VM hole tricks on us... */
+#ifdef DEBUG_EXCEPTIONS
+			printk("Exception: PC<%016lx> faddr<UNKNOWN>\n", regs->tpc);
+			printk("EX_TABLE: insn<%016lx> fixup<%016lx>\n",
+			       regs->tpc, entry->fixup);
+#endif
+			regs->tpc = entry->fixup;
+			regs->tnpc = regs->tpc + 4;
+			return;
+		}
 		printk("sun4v_data_access_exception: ADDR[%016lx] "
 		       "CTX[%04x] TYPE[%04x], going.\n",
 		       addr, ctx, type);
-- 
cgit v1.2.3


From 3eb8057bbafc64dbf09d5c18513aa80c1b7f2fcb Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Wed, 21 Jan 2009 21:30:23 -0800
Subject: sparc64: Move generic PCR support code to seperate file.

It all lives in the oprofile support code currently and we will need
to share this stuff with NMI watchdog and perf_counter support.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/Makefile |   1 +
 arch/sparc/kernel/pcr.c    | 140 +++++++++++++++++++++++++++++++++++++++++++++
 arch/sparc/kernel/ttable.S |   3 +-
 3 files changed, 143 insertions(+), 1 deletion(-)
 create mode 100644 arch/sparc/kernel/pcr.c

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index 53adcaa0348..cb182d9c2f2 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -52,6 +52,7 @@ obj-$(CONFIG_SPARC64)   += visemul.o
 obj-$(CONFIG_SPARC64)   += hvapi.o
 obj-$(CONFIG_SPARC64)   += sstate.o
 obj-$(CONFIG_SPARC64)   += mdesc.o
+obj-$(CONFIG_SPARC64)	+= pcr.o
 
 # sparc32 do not use GENERIC_HARDIRQS but uses the generic devres implementation
 obj-$(CONFIG_SPARC32)     += devres.o
diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
new file mode 100644
index 00000000000..c4f24703b16
--- /dev/null
+++ b/arch/sparc/kernel/pcr.c
@@ -0,0 +1,140 @@
+/* pcr.c: Generic sparc64 performance counter infrastructure.
+ *
+ * Copyright (C) 2009 David S. Miller (davem@davemloft.net)
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/irq.h>
+
+#include <asm/pil.h>
+#include <asm/pcr.h>
+
+/* This code is shared between various users of the performance
+ * counters.  Users will be oprofile, pseudo-NMI watchdog, and the
+ * perf_counter support layer.
+ */
+
+/* Performance counter interrupts run unmasked at PIL level 15.
+ * Therefore we can't do things like wakeups and other work
+ * that expects IRQ disabling to be adhered to in locking etc.
+ *
+ * Therefore in such situations we defer the work by signalling
+ * a lower level cpu IRQ.
+ */
+void deferred_pcr_work_irq(int irq, struct pt_regs *regs)
+{
+	clear_softint(1 << PIL_DEFERRED_PCR_WORK);
+}
+
+void schedule_deferred_pcr_work(void)
+{
+	set_softint(1 << PIL_DEFERRED_PCR_WORK);
+}
+
+const struct pcr_ops *pcr_ops;
+EXPORT_SYMBOL_GPL(pcr_ops);
+
+static u64 direct_pcr_read(void)
+{
+	u64 val;
+
+	read_pcr(val);
+	return val;
+}
+
+static void direct_pcr_write(u64 val)
+{
+	write_pcr(val);
+}
+
+static const struct pcr_ops direct_pcr_ops = {
+	.read	= direct_pcr_read,
+	.write	= direct_pcr_write,
+};
+
+static void n2_pcr_write(u64 val)
+{
+	unsigned long ret;
+
+	ret = sun4v_niagara2_setperf(HV_N2_PERF_SPARC_CTL, val);
+	if (val != HV_EOK)
+		write_pcr(val);
+}
+
+static const struct pcr_ops n2_pcr_ops = {
+	.read	= direct_pcr_read,
+	.write	= n2_pcr_write,
+};
+
+static unsigned long perf_hsvc_group;
+static unsigned long perf_hsvc_major;
+static unsigned long perf_hsvc_minor;
+
+static int __init register_perf_hsvc(void)
+{
+	if (tlb_type == hypervisor) {
+		switch (sun4v_chip_type) {
+		case SUN4V_CHIP_NIAGARA1:
+			perf_hsvc_group = HV_GRP_NIAG_PERF;
+			break;
+
+		case SUN4V_CHIP_NIAGARA2:
+			perf_hsvc_group = HV_GRP_N2_CPU;
+			break;
+
+		default:
+			return -ENODEV;
+		}
+
+
+		perf_hsvc_major = 1;
+		perf_hsvc_minor = 0;
+		if (sun4v_hvapi_register(perf_hsvc_group,
+					 perf_hsvc_major,
+					 &perf_hsvc_minor)) {
+			printk("perfmon: Could not register hvapi.\n");
+			return -ENODEV;
+		}
+	}
+	return 0;
+}
+
+static void __init unregister_perf_hsvc(void)
+{
+	if (tlb_type != hypervisor)
+		return;
+	sun4v_hvapi_unregister(perf_hsvc_group);
+}
+
+int __init pcr_arch_init(void)
+{
+	int err = register_perf_hsvc();
+
+	if (err)
+		return err;
+
+	switch (tlb_type) {
+	case hypervisor:
+		pcr_ops = &n2_pcr_ops;
+		break;
+
+	case spitfire:
+	case cheetah:
+	case cheetah_plus:
+		pcr_ops = &direct_pcr_ops;
+		break;
+
+	default:
+		err = -ENODEV;
+		goto out_unregister;
+	}
+
+	return 0;
+
+out_unregister:
+	unregister_perf_hsvc();
+	return err;
+}
+
+arch_initcall(pcr_arch_init);
diff --git a/arch/sparc/kernel/ttable.S b/arch/sparc/kernel/ttable.S
index ea925503b42..d9bdfb9d5c1 100644
--- a/arch/sparc/kernel/ttable.S
+++ b/arch/sparc/kernel/ttable.S
@@ -63,7 +63,8 @@ tl0_irq6:	TRAP_IRQ(smp_call_function_single_client, 6)
 #else
 tl0_irq6:	BTRAP(0x46)
 #endif
-tl0_irq7:	BTRAP(0x47) BTRAP(0x48) BTRAP(0x49)
+tl0_irq7:	TRAP_IRQ(deferred_pcr_work_irq, 7)
+tl0_irq8:	BTRAP(0x48) BTRAP(0x49)
 tl0_irq10:	BTRAP(0x4a) BTRAP(0x4b) BTRAP(0x4c) BTRAP(0x4d)
 tl0_irq14:	TRAP_IRQ(timer_interrupt, 14)
 tl0_irq15:	TRAP_NMI_IRQ(perfctr_irq, 15)
-- 
cgit v1.2.3


From c3cf5e8cc56d272f828a66610bb78bbb727b2ce1 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Wed, 21 Jan 2009 23:16:40 -0800
Subject: sparc: Probe PMU type and record in sparc_pmu_type.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/cpu.c      | 33 ++++++++++++++++++++++-----------
 arch/sparc/kernel/kernel.h   |  1 +
 arch/sparc/kernel/setup_64.c |  2 ++
 3 files changed, 25 insertions(+), 11 deletions(-)

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/cpu.c b/arch/sparc/kernel/cpu.c
index 32d32b4824f..d85c3dc4953 100644
--- a/arch/sparc/kernel/cpu.c
+++ b/arch/sparc/kernel/cpu.c
@@ -26,6 +26,7 @@ EXPORT_PER_CPU_SYMBOL(__cpu_data);
 struct cpu_info {
 	int psr_vers;
 	const char *name;
+	const char *pmu_name;
 };
 
 struct fpu_info {
@@ -45,6 +46,9 @@ struct manufacturer_info {
 #define CPU(ver, _name) \
 { .psr_vers = ver, .name = _name }
 
+#define CPU_PMU(ver, _name, _pmu_name)	\
+{ .psr_vers = ver, .name = _name, .pmu_name = _pmu_name }
+
 #define FPU(ver, _name) \
 { .fp_vers = ver, .name = _name }
 
@@ -183,10 +187,10 @@ static const struct manufacturer_info __initconst manufacturer_info[] = {
 },{
 	0x17,
 	.cpu_info = {
-		CPU(0x10, "TI UltraSparc I   (SpitFire)"),
-		CPU(0x11, "TI UltraSparc II  (BlackBird)"),
-		CPU(0x12, "TI UltraSparc IIi (Sabre)"),
-		CPU(0x13, "TI UltraSparc IIe (Hummingbird)"),
+		CPU_PMU(0x10, "TI UltraSparc I   (SpitFire)", "ultra12"),
+		CPU_PMU(0x11, "TI UltraSparc II  (BlackBird)", "ultra12"),
+		CPU_PMU(0x12, "TI UltraSparc IIi (Sabre)", "ultra12"),
+		CPU_PMU(0x13, "TI UltraSparc IIe (Hummingbird)", "ultra12"),
 		CPU(-1, NULL)
 	},
 	.fpu_info = {
@@ -199,7 +203,7 @@ static const struct manufacturer_info __initconst manufacturer_info[] = {
 },{
 	0x22,
 	.cpu_info = {
-		CPU(0x10, "TI UltraSparc I   (SpitFire)"),
+		CPU_PMU(0x10, "TI UltraSparc I   (SpitFire)", "ultra12"),
 		CPU(-1, NULL)
 	},
 	.fpu_info = {
@@ -209,12 +213,12 @@ static const struct manufacturer_info __initconst manufacturer_info[] = {
 },{
 	0x3e,
 	.cpu_info = {
-		CPU(0x14, "TI UltraSparc III (Cheetah)"),
-		CPU(0x15, "TI UltraSparc III+ (Cheetah+)"),
-		CPU(0x16, "TI UltraSparc IIIi (Jalapeno)"),
-		CPU(0x18, "TI UltraSparc IV (Jaguar)"),
-		CPU(0x19, "TI UltraSparc IV+ (Panther)"),
-		CPU(0x22, "TI UltraSparc IIIi+ (Serrano)"),
+		CPU_PMU(0x14, "TI UltraSparc III (Cheetah)", "ultra3"),
+		CPU_PMU(0x15, "TI UltraSparc III+ (Cheetah+)", "ultra3+"),
+		CPU_PMU(0x16, "TI UltraSparc IIIi (Jalapeno)", "ultra3i"),
+		CPU_PMU(0x18, "TI UltraSparc IV (Jaguar)", "ultra3+"),
+		CPU_PMU(0x19, "TI UltraSparc IV+ (Panther)", "ultra4+"),
+		CPU_PMU(0x22, "TI UltraSparc IIIi+ (Serrano)", "ultra3i"),
 		CPU(-1, NULL)
 	},
 	.fpu_info = {
@@ -234,6 +238,7 @@ static const struct manufacturer_info __initconst manufacturer_info[] = {
 
 const char *sparc_cpu_type;
 const char *sparc_fpu_type;
+const char *sparc_pmu_type;
 
 unsigned int fsr_storage;
 
@@ -244,6 +249,7 @@ static void set_cpu_and_fpu(int psr_impl, int psr_vers, int fpu_vers)
 
 	sparc_cpu_type = NULL;
 	sparc_fpu_type = NULL;
+	sparc_pmu_type = NULL;
 	manuf = NULL;
 
 	for (i = 0; i < ARRAY_SIZE(manufacturer_info); i++)
@@ -263,6 +269,7 @@ static void set_cpu_and_fpu(int psr_impl, int psr_vers, int fpu_vers)
 		{
 			if (cpu->psr_vers == psr_vers) {
 				sparc_cpu_type = cpu->name;
+				sparc_pmu_type = cpu->pmu_name;
 				sparc_fpu_type = "No FPU";
 				break;
 			}
@@ -290,6 +297,8 @@ static void set_cpu_and_fpu(int psr_impl, int psr_vers, int fpu_vers)
 		       psr_impl, fpu_vers);
 		sparc_fpu_type = "Unknown FPU";
 	}
+	if (sparc_pmu_type == NULL)
+		sparc_pmu_type = "Unknown PMU";
 }
 
 #ifdef CONFIG_SPARC32
@@ -315,11 +324,13 @@ static void __init sun4v_cpu_probe(void)
 	case SUN4V_CHIP_NIAGARA1:
 		sparc_cpu_type = "UltraSparc T1 (Niagara)";
 		sparc_fpu_type = "UltraSparc T1 integrated FPU";
+		sparc_pmu_type = "niagara";
 		break;
 
 	case SUN4V_CHIP_NIAGARA2:
 		sparc_cpu_type = "UltraSparc T2 (Niagara2)";
 		sparc_fpu_type = "UltraSparc T2 integrated FPU";
+		sparc_pmu_type = "niagara2";
 		break;
 
 	default:
diff --git a/arch/sparc/kernel/kernel.h b/arch/sparc/kernel/kernel.h
index 81a972e8d8e..15d8a3f645c 100644
--- a/arch/sparc/kernel/kernel.h
+++ b/arch/sparc/kernel/kernel.h
@@ -5,6 +5,7 @@
 
 /* cpu.c */
 extern const char *sparc_cpu_type;
+extern const char *sparc_pmu_type;
 extern const char *sparc_fpu_type;
 
 extern unsigned int fsr_storage;
diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
index 49d061f4ae9..f2bcfd2967d 100644
--- a/arch/sparc/kernel/setup_64.c
+++ b/arch/sparc/kernel/setup_64.c
@@ -354,6 +354,7 @@ static int show_cpuinfo(struct seq_file *m, void *__unused)
 	seq_printf(m, 
 		   "cpu\t\t: %s\n"
 		   "fpu\t\t: %s\n"
+		   "pmu\t\t: %s\n"
 		   "prom\t\t: %s\n"
 		   "type\t\t: %s\n"
 		   "ncpus probed\t: %d\n"
@@ -366,6 +367,7 @@ static int show_cpuinfo(struct seq_file *m, void *__unused)
 		   ,
 		   sparc_cpu_type,
 		   sparc_fpu_type,
+		   sparc_pmu_type,
 		   prom_version,
 		   ((tlb_type == hypervisor) ?
 		    "sun4v" :
-- 
cgit v1.2.3


From e5553a6d04421eec326a629571d696e8e745a0e4 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Thu, 29 Jan 2009 21:22:47 -0800
Subject: sparc64: Implement NMI watchdog on capable cpus.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/Makefile |   1 +
 arch/sparc/kernel/irq_64.c |  68 +-------------
 arch/sparc/kernel/nmi.c    | 224 +++++++++++++++++++++++++++++++++++++++++++++
 arch/sparc/kernel/pcr.c    |  17 +++-
 4 files changed, 245 insertions(+), 65 deletions(-)
 create mode 100644 arch/sparc/kernel/nmi.c

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/Makefile b/arch/sparc/kernel/Makefile
index cb182d9c2f2..54742e58831 100644
--- a/arch/sparc/kernel/Makefile
+++ b/arch/sparc/kernel/Makefile
@@ -53,6 +53,7 @@ obj-$(CONFIG_SPARC64)   += hvapi.o
 obj-$(CONFIG_SPARC64)   += sstate.o
 obj-$(CONFIG_SPARC64)   += mdesc.o
 obj-$(CONFIG_SPARC64)	+= pcr.o
+obj-$(CONFIG_SPARC64)	+= nmi.o
 
 # sparc32 do not use GENERIC_HARDIRQS but uses the generic devres implementation
 obj-$(CONFIG_SPARC32)     += devres.o
diff --git a/arch/sparc/kernel/irq_64.c b/arch/sparc/kernel/irq_64.c
index cab8e028687..e289376198e 100644
--- a/arch/sparc/kernel/irq_64.c
+++ b/arch/sparc/kernel/irq_64.c
@@ -196,6 +196,11 @@ int show_interrupts(struct seq_file *p, void *v)
 		seq_putc(p, '\n');
 skip:
 		spin_unlock_irqrestore(&irq_desc[i].lock, flags);
+	} else if (i == NR_IRQS) {
+		seq_printf(p, "NMI: ");
+		for_each_online_cpu(j)
+			seq_printf(p, "%10u ", cpu_data(j).__nmi_count);
+		seq_printf(p, "     Non-maskable interrupts\n");
 	}
 	return 0;
 }
@@ -778,69 +783,6 @@ void do_softirq(void)
 	local_irq_restore(flags);
 }
 
-static void unhandled_perf_irq(struct pt_regs *regs)
-{
-	unsigned long pcr, pic;
-
-	read_pcr(pcr);
-	read_pic(pic);
-
-	write_pcr(0);
-
-	printk(KERN_EMERG "CPU %d: Got unexpected perf counter IRQ.\n",
-	       smp_processor_id());
-	printk(KERN_EMERG "CPU %d: PCR[%016lx] PIC[%016lx]\n",
-	       smp_processor_id(), pcr, pic);
-}
-
-/* Almost a direct copy of the powerpc PMC code.  */
-static DEFINE_SPINLOCK(perf_irq_lock);
-static void *perf_irq_owner_caller; /* mostly for debugging */
-static void (*perf_irq)(struct pt_regs *regs) = unhandled_perf_irq;
-
-/* Invoked from level 15 PIL handler in trap table.  */
-void perfctr_irq(int irq, struct pt_regs *regs)
-{
-	clear_softint(1 << irq);
-	perf_irq(regs);
-}
-
-int register_perfctr_intr(void (*handler)(struct pt_regs *))
-{
-	int ret;
-
-	if (!handler)
-		return -EINVAL;
-
-	spin_lock(&perf_irq_lock);
-	if (perf_irq != unhandled_perf_irq) {
-		printk(KERN_WARNING "register_perfctr_intr: "
-		       "perf IRQ busy (reserved by caller %p)\n",
-		       perf_irq_owner_caller);
-		ret = -EBUSY;
-		goto out;
-	}
-
-	perf_irq_owner_caller = __builtin_return_address(0);
-	perf_irq = handler;
-
-	ret = 0;
-out:
-	spin_unlock(&perf_irq_lock);
-
-	return ret;
-}
-EXPORT_SYMBOL_GPL(register_perfctr_intr);
-
-void release_perfctr_intr(void (*handler)(struct pt_regs *))
-{
-	spin_lock(&perf_irq_lock);
-	perf_irq_owner_caller = NULL;
-	perf_irq = unhandled_perf_irq;
-	spin_unlock(&perf_irq_lock);
-}
-EXPORT_SYMBOL_GPL(release_perfctr_intr);
-
 #ifdef CONFIG_HOTPLUG_CPU
 void fixup_irqs(void)
 {
diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c
new file mode 100644
index 00000000000..ffc69009334
--- /dev/null
+++ b/arch/sparc/kernel/nmi.c
@@ -0,0 +1,224 @@
+/* Pseudo NMI support on sparc64 systems.
+ *
+ * Copyright (C) 2009 David S. Miller <davem@davemloft.net>
+ *
+ * The NMI watchdog support and infrastructure is based almost
+ * entirely upon the x86 NMI support code.
+ */
+#include <linux/kernel.h>
+#include <linux/param.h>
+#include <linux/init.h>
+#include <linux/percpu.h>
+#include <linux/nmi.h>
+#include <linux/module.h>
+#include <linux/kprobes.h>
+#include <linux/kernel_stat.h>
+#include <linux/slab.h>
+#include <linux/kdebug.h>
+#include <linux/delay.h>
+#include <linux/smp.h>
+
+#include <asm/ptrace.h>
+#include <asm/local.h>
+#include <asm/pcr.h>
+
+/* We don't have a real NMI on sparc64, but we can fake one
+ * up using profiling counter overflow interrupts and interrupt
+ * levels.
+ *
+ * The profile overflow interrupts at level 15, so we use
+ * level 14 as our IRQ off level.
+ */
+
+static int nmi_watchdog_active;
+static int panic_on_timeout;
+
+int nmi_usable;
+EXPORT_SYMBOL_GPL(nmi_usable);
+
+static unsigned int nmi_hz = HZ;
+
+static DEFINE_PER_CPU(unsigned int, last_irq_sum);
+static DEFINE_PER_CPU(local_t, alert_counter);
+static DEFINE_PER_CPU(int, nmi_touch);
+
+void touch_nmi_watchdog(void)
+{
+	if (nmi_watchdog_active) {
+		int cpu;
+
+		for_each_present_cpu(cpu) {
+			if (per_cpu(nmi_touch, cpu) != 1)
+				per_cpu(nmi_touch, cpu) = 1;
+		}
+	}
+
+	touch_softlockup_watchdog();
+}
+EXPORT_SYMBOL(touch_nmi_watchdog);
+
+static void die_nmi(const char *str, struct pt_regs *regs, int do_panic)
+{
+	if (notify_die(DIE_NMIWATCHDOG, str, regs, 0,
+		       pt_regs_trap_type(regs), SIGINT) == NOTIFY_STOP)
+		return;
+
+	console_verbose();
+	bust_spinlocks(1);
+
+	printk(KERN_EMERG "%s", str);
+	printk(" on CPU%d, ip %08lx, registers:\n",
+	       smp_processor_id(), regs->tpc);
+	show_regs(regs);
+
+	bust_spinlocks(0);
+
+	if (do_panic || panic_on_oops)
+		panic("Non maskable interrupt");
+
+	local_irq_enable();
+	do_exit(SIGBUS);
+}
+
+notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs)
+{
+	unsigned int sum, touched = 0;
+	int cpu = smp_processor_id();
+
+	clear_softint(1 << irq);
+	pcr_ops->write(PCR_PIC_PRIV);
+
+	local_cpu_data().__nmi_count++;
+
+	if (notify_die(DIE_NMI, "nmi", regs, 0,
+		       pt_regs_trap_type(regs), SIGINT) == NOTIFY_STOP)
+		touched = 1;
+
+	sum = kstat_cpu(cpu).irqs[0];
+	if (__get_cpu_var(nmi_touch)) {
+		__get_cpu_var(nmi_touch) = 0;
+		touched = 1;
+	}
+	if (!touched && __get_cpu_var(last_irq_sum) == sum) {
+		local_inc(&__get_cpu_var(alert_counter));
+		if (local_read(&__get_cpu_var(alert_counter)) == 5 * nmi_hz)
+			die_nmi("BUG: NMI Watchdog detected LOCKUP",
+				regs, panic_on_timeout);
+	} else {
+		__get_cpu_var(last_irq_sum) = sum;
+		local_set(&__get_cpu_var(alert_counter), 0);
+	}
+	if (nmi_usable) {
+		write_pic(picl_value(nmi_hz));
+		pcr_ops->write(pcr_enable);
+	}
+}
+
+static inline unsigned int get_nmi_count(int cpu)
+{
+	return cpu_data(cpu).__nmi_count;
+}
+
+static int endflag __initdata;
+
+static __init void nmi_cpu_busy(void *data)
+{
+	local_irq_enable_in_hardirq();
+	while (endflag == 0)
+		mb();
+}
+
+static void report_broken_nmi(int cpu, int *prev_nmi_count)
+{
+	printk(KERN_CONT "\n");
+
+	printk(KERN_WARNING
+		"WARNING: CPU#%d: NMI appears to be stuck (%d->%d)!\n",
+			cpu, prev_nmi_count[cpu], get_nmi_count(cpu));
+
+	printk(KERN_WARNING
+		"Please report this to bugzilla.kernel.org,\n");
+	printk(KERN_WARNING
+		"and attach the output of the 'dmesg' command.\n");
+
+	nmi_usable = 0;
+}
+
+static void stop_watchdog(void *unused)
+{
+	pcr_ops->write(PCR_PIC_PRIV);
+}
+
+static int __init check_nmi_watchdog(void)
+{
+	unsigned int *prev_nmi_count;
+	int cpu, err;
+
+	prev_nmi_count = kmalloc(nr_cpu_ids * sizeof(unsigned int), GFP_KERNEL);
+	if (!prev_nmi_count) {
+		err = -ENOMEM;
+		goto error;
+	}
+
+	printk(KERN_INFO "Testing NMI watchdog ... ");
+
+	smp_call_function(nmi_cpu_busy, (void *)&endflag, 0);
+
+	for_each_possible_cpu(cpu)
+		prev_nmi_count[cpu] = get_nmi_count(cpu);
+	local_irq_enable();
+	mdelay((20 * 1000) / nmi_hz); /* wait 20 ticks */
+
+	for_each_online_cpu(cpu) {
+		if (get_nmi_count(cpu) - prev_nmi_count[cpu] <= 5)
+			report_broken_nmi(cpu, prev_nmi_count);
+	}
+	endflag = 1;
+	if (!nmi_usable) {
+		kfree(prev_nmi_count);
+		err = -ENODEV;
+		goto error;
+	}
+	printk("OK.\n");
+
+	nmi_hz = 1;
+
+	kfree(prev_nmi_count);
+	return 0;
+error:
+	on_each_cpu(stop_watchdog, NULL, 1);
+	return err;
+}
+
+static void start_watchdog(void *unused)
+{
+	pcr_ops->write(PCR_PIC_PRIV);
+	write_pic(picl_value(nmi_hz));
+
+	pcr_ops->write(pcr_enable);
+}
+
+void nmi_adjust_hz(unsigned int new_hz)
+{
+	nmi_hz = new_hz;
+	on_each_cpu(start_watchdog, NULL, 1);
+}
+EXPORT_SYMBOL_GPL(nmi_adjust_hz);
+
+int __init nmi_init(void)
+{
+	nmi_usable = 1;
+
+	on_each_cpu(start_watchdog, NULL, 1);
+
+	return check_nmi_watchdog();
+}
+
+static int __init setup_nmi_watchdog(char *str)
+{
+	if (!strncmp(str, "panic", 5))
+		panic_on_timeout = 1;
+
+	return 0;
+}
+__setup("nmi_watchdog=", setup_nmi_watchdog);
diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
index c4f24703b16..92e0dda141a 100644
--- a/arch/sparc/kernel/pcr.c
+++ b/arch/sparc/kernel/pcr.c
@@ -9,12 +9,22 @@
 
 #include <asm/pil.h>
 #include <asm/pcr.h>
+#include <asm/nmi.h>
 
 /* This code is shared between various users of the performance
  * counters.  Users will be oprofile, pseudo-NMI watchdog, and the
  * perf_counter support layer.
  */
 
+#define PCR_SUN4U_ENABLE	(PCR_PIC_PRIV | PCR_STRACE | PCR_UTRACE)
+#define PCR_N2_ENABLE		(PCR_PIC_PRIV | PCR_STRACE | PCR_UTRACE | \
+				 PCR_N2_TOE_OV1 | \
+				 (2 << PCR_N2_SL1_SHIFT) | \
+				 (0xff << PCR_N2_MASK1_SHIFT))
+
+u64 pcr_enable;
+unsigned int picl_shift;
+
 /* Performance counter interrupts run unmasked at PIL level 15.
  * Therefore we can't do things like wakeups and other work
  * that expects IRQ disabling to be adhered to in locking etc.
@@ -117,12 +127,15 @@ int __init pcr_arch_init(void)
 	switch (tlb_type) {
 	case hypervisor:
 		pcr_ops = &n2_pcr_ops;
+		pcr_enable = PCR_N2_ENABLE;
+		picl_shift = 2;
 		break;
 
-	case spitfire:
 	case cheetah:
 	case cheetah_plus:
+	case spitfire:
 		pcr_ops = &direct_pcr_ops;
+		pcr_enable = PCR_SUN4U_ENABLE;
 		break;
 
 	default:
@@ -130,7 +143,7 @@ int __init pcr_arch_init(void)
 		goto out_unregister;
 	}
 
-	return 0;
+	return nmi_init();
 
 out_unregister:
 	unregister_perf_hsvc();
-- 
cgit v1.2.3


From 802c64b310e5b9dfda6cb50b850b962ed96a9e81 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Mon, 2 Feb 2009 21:57:48 -0800
Subject: sparc64: On non-Niagara, need to touch NMI watchdog in NOHZ mode.

When we're idling in NOHZ mode, timer interrupts are not running.

Evidence of processing timer interrupts is what the NMI watchdog
uses to determine if the CPU is stuck.

On Niagara, we'll yield the cpu.  This will make the cpu, at
worst, hang out in the hypervisor until an interrupt arrives.
This will prevent the NMI watchdog timer from firing.

However on non-Niagara we just loop executing instructions
which will cause the NMI watchdog to keep firing.  It won't
see timer interrupts happening so it will think the cpu is
stuck.

Fix this by touching the NMI watchdog in the cpu idle loop
on non-Niagara machines.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/process_64.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/process_64.c b/arch/sparc/kernel/process_64.c
index cc8b5604442..a73954b87f0 100644
--- a/arch/sparc/kernel/process_64.c
+++ b/arch/sparc/kernel/process_64.c
@@ -29,6 +29,7 @@
 #include <linux/cpu.h>
 #include <linux/elfcore.h>
 #include <linux/sysrq.h>
+#include <linux/nmi.h>
 
 #include <asm/uaccess.h>
 #include <asm/system.h>
@@ -52,8 +53,10 @@
 
 static void sparc64_yield(int cpu)
 {
-	if (tlb_type != hypervisor)
+	if (tlb_type != hypervisor) {
+		touch_nmi_watchdog();
 		return;
+	}
 
 	clear_thread_flag(TIF_POLLING_NRFLAG);
 	smp_mb__after_clear_bit();
-- 
cgit v1.2.3


From 47a4a0e766e3152dee667ea8fcca8465c8a0759f Mon Sep 17 00:00:00 2001
From: Stephen Rothwell <sfr@canb.auug.org.au>
Date: Mon, 2 Feb 2009 22:14:28 -0800
Subject: sparc: fixup for sparseirq changes

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/nmi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c
index ffc69009334..09f088ed4a6 100644
--- a/arch/sparc/kernel/nmi.c
+++ b/arch/sparc/kernel/nmi.c
@@ -94,7 +94,7 @@ notrace __kprobes void perfctr_irq(int irq, struct pt_regs *regs)
 		       pt_regs_trap_type(regs), SIGINT) == NOTIFY_STOP)
 		touched = 1;
 
-	sum = kstat_cpu(cpu).irqs[0];
+	sum = kstat_irqs_cpu(0, cpu);
 	if (__get_cpu_var(nmi_touch)) {
 		__get_cpu_var(nmi_touch) = 0;
 		touched = 1;
-- 
cgit v1.2.3


From dc4ff585ffbc6cb0c872697b2d5f42293a32e5c8 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Wed, 4 Feb 2009 13:48:11 -0800
Subject: sparc64: Call dump_stack() in die_nmi().

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/nmi.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/nmi.c b/arch/sparc/kernel/nmi.c
index 09f088ed4a6..f3577223c86 100644
--- a/arch/sparc/kernel/nmi.c
+++ b/arch/sparc/kernel/nmi.c
@@ -70,6 +70,7 @@ static void die_nmi(const char *str, struct pt_regs *regs, int do_panic)
 	printk(" on CPU%d, ip %08lx, registers:\n",
 	       smp_processor_id(), regs->tpc);
 	show_regs(regs);
+	dump_stack();
 
 	bust_spinlocks(0);
 
-- 
cgit v1.2.3


From 1c2f61d40b691789626489fa947a3e003c9a84be Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Thu, 5 Feb 2009 23:59:04 -0800
Subject: sparc64: Don't hook up pcr_ops on spitfire chips.

They can't be used for profiling and NMI watchdog currently
since they lack the counter overflow interrupt.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/pcr.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
index 92e0dda141a..1ae8cdd7e70 100644
--- a/arch/sparc/kernel/pcr.c
+++ b/arch/sparc/kernel/pcr.c
@@ -133,11 +133,16 @@ int __init pcr_arch_init(void)
 
 	case cheetah:
 	case cheetah_plus:
-	case spitfire:
 		pcr_ops = &direct_pcr_ops;
 		pcr_enable = PCR_SUN4U_ENABLE;
 		break;
 
+	case spitfire:
+		/* UltraSPARC-I/II and derivatives lack a profile
+		 * counter overflow interrupt so we can't make use of
+		 * their hardware currently.
+		 */
+		/* fallthrough */
 	default:
 		err = -ENODEV;
 		goto out_unregister;
-- 
cgit v1.2.3


From 40bdac7dbc161639a498697f34fbd1ee800e51f4 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Sun, 8 Feb 2009 22:00:55 -0800
Subject: sparc64: Kill .fixup section bloat.

This is an implementation of a suggestion made by Chris Torek:
--------------------
Something else I noticed in passing: the EX and EX_LD/EX_ST macros
scattered throughout the various .S files make a fair bit of .fixup
code, all of which does the same thing.  At the cost of one symbol
in copy_in_user.S, you could just have one common two-instruction
retl-and-mov-1 fixup that they all share.
--------------------

The following is with a defconfig build:

   text	   data	    bss	    dec	    hex	filename
3972767	 344024	 584449	4901240	 4ac978	vmlinux.orig
3968887	 344024	 584449	4897360	 4aba50	vmlinux

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/head_64.S | 31 ++++++++++++++++++++++++++++---
 1 file changed, 28 insertions(+), 3 deletions(-)

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/head_64.S b/arch/sparc/kernel/head_64.S
index 8ffee714f93..a46c3a21e26 100644
--- a/arch/sparc/kernel/head_64.S
+++ b/arch/sparc/kernel/head_64.S
@@ -891,10 +891,35 @@ prom_tba:	.xword	0
 tlb_type:	.word	0	/* Must NOT end up in BSS */
 	.section	".fixup",#alloc,#execinstr
 
-	.globl	__ret_efault, __retl_efault
-__ret_efault:
+	.globl	__ret_efault, __retl_efault, __ret_one, __retl_one
+ENTRY(__ret_efault)
 	ret
 	 restore %g0, -EFAULT, %o0
-__retl_efault:
+ENDPROC(__ret_efault)
+
+ENTRY(__retl_efault)
 	retl
 	 mov	-EFAULT, %o0
+ENDPROC(__retl_efault)
+
+ENTRY(__retl_one)
+	retl
+	 mov	1, %o0
+ENDPROC(__retl_one)
+
+ENTRY(__ret_one_asi)
+	wr	%g0, ASI_AIUS, %asi
+	ret
+	 restore %g0, 1, %o0
+ENDPROC(__ret_one_asi)
+
+ENTRY(__retl_one_asi)
+	wr	%g0, ASI_AIUS, %asi
+	retl
+	 mov	1, %o0
+ENDPROC(__retl_one_asi)
+
+ENTRY(__retl_o1)
+	retl
+	 mov	%o1, %o0
+ENDPROC(__retl_o1)
-- 
cgit v1.2.3


From 1b0e235cc9bfae4bc0f5cd0cba929206fb0f6a64 Mon Sep 17 00:00:00 2001
From: "David S. Miller" <davem@davemloft.net>
Date: Wed, 11 Feb 2009 00:54:07 -0800
Subject: sparc64: Fix crashes in jbusmc_print_dimm()

Return was missing for the case where there is no dimm
info match.

Signed-off-by: David S. Miller <davem@davemloft.net>
---
 arch/sparc/kernel/chmc.c | 1 +
 1 file changed, 1 insertion(+)

(limited to 'arch/sparc/kernel')

diff --git a/arch/sparc/kernel/chmc.c b/arch/sparc/kernel/chmc.c
index 3b9f4d6e14a..e1a9598e2a4 100644
--- a/arch/sparc/kernel/chmc.c
+++ b/arch/sparc/kernel/chmc.c
@@ -306,6 +306,7 @@ static int jbusmc_print_dimm(int syndrome_code,
 		buf[1] = '?';
 		buf[2] = '?';
 		buf[3] = '\0';
+		return 0;
 	}
 	p = dp->controller;
 	prop = &p->layout;
-- 
cgit v1.2.3