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-rw-r--r--arch/powerpc/kernel/Makefile1
-rw-r--r--arch/powerpc/kernel/asm-offsets.c7
-rw-r--r--arch/powerpc/kernel/entry_32.S5
-rw-r--r--arch/powerpc/kernel/head_64.S11
-rw-r--r--arch/powerpc/kernel/irq.c10
-rw-r--r--arch/powerpc/kernel/lparcfg.c6
-rw-r--r--arch/powerpc/kernel/misc_32.S25
-rw-r--r--arch/powerpc/kernel/proc_ppc64.c5
-rw-r--r--arch/powerpc/kernel/process.c2
-rw-r--r--arch/powerpc/kernel/rio.c52
-rw-r--r--arch/powerpc/kernel/rtas-proc.c45
-rw-r--r--arch/powerpc/kernel/rtas_flash.c13
-rw-r--r--arch/powerpc/kernel/setup_32.c21
13 files changed, 94 insertions, 109 deletions
diff --git a/arch/powerpc/kernel/Makefile b/arch/powerpc/kernel/Makefile
index 9177b21b1a9..d14cebf62bb 100644
--- a/arch/powerpc/kernel/Makefile
+++ b/arch/powerpc/kernel/Makefile
@@ -73,7 +73,6 @@ pci64-$(CONFIG_PPC64) += pci_dn.o isa-bridge.o
obj-$(CONFIG_PCI) += pci_$(CONFIG_WORD_SIZE).o $(pci64-y) \
pci-common.o
obj-$(CONFIG_PCI_MSI) += msi.o
-obj-$(CONFIG_RAPIDIO) += rio.o
obj-$(CONFIG_KEXEC) += machine_kexec.o crash.o \
machine_kexec_$(CONFIG_WORD_SIZE).o
obj-$(CONFIG_AUDIT) += audit.o
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 62134845af0..ec9228d687b 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -30,6 +30,7 @@
#include <linux/time.h>
#include <linux/hardirq.h>
#endif
+#include <linux/kbuild.h>
#include <asm/io.h>
#include <asm/page.h>
@@ -51,11 +52,6 @@
#include <asm/iseries/alpaca.h>
#endif
-#define DEFINE(sym, val) \
- asm volatile("\n->" #sym " %0 " #val : : "i" (val))
-
-#define BLANK() asm volatile("\n->" : : )
-
int main(void)
{
DEFINE(THREAD, offsetof(struct task_struct, thread));
@@ -67,6 +63,7 @@ int main(void)
#endif /* CONFIG_PPC64 */
DEFINE(KSP, offsetof(struct thread_struct, ksp));
+ DEFINE(KSP_LIMIT, offsetof(struct thread_struct, ksp_limit));
DEFINE(PT_REGS, offsetof(struct thread_struct, regs));
DEFINE(THREAD_FPEXC_MODE, offsetof(struct thread_struct, fpexc_mode));
DEFINE(THREAD_FPR0, offsetof(struct thread_struct, fpr[0]));
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 84c86863306..0c8614d9875 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -137,11 +137,12 @@ transfer_to_handler:
2: /* if from kernel, check interrupted DOZE/NAP mode and
* check for stack overflow
*/
- lwz r9,THREAD_INFO-THREAD(r12)
- cmplw r1,r9 /* if r1 <= current->thread_info */
+ lwz r9,KSP_LIMIT(r12)
+ cmplw r1,r9 /* if r1 <= ksp_limit */
ble- stack_ovf /* then the kernel stack overflowed */
5:
#ifdef CONFIG_6xx
+ rlwinm r9,r1,0,0,31-THREAD_SHIFT
tophys(r9,r9) /* check local flags */
lwz r12,TI_LOCAL_FLAGS(r9)
mtcrf 0x01,r12
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 215973a2c8d..024805e1747 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -239,6 +239,10 @@ instruction_access_slb_pSeries:
.globl system_call_pSeries
system_call_pSeries:
HMT_MEDIUM
+BEGIN_FTR_SECTION
+ cmpdi r0,0x1ebe
+ beq- 1f
+END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE)
mr r9,r13
mfmsr r10
mfspr r13,SPRN_SPRG3
@@ -253,6 +257,13 @@ system_call_pSeries:
rfid
b . /* prevent speculative execution */
+/* Fast LE/BE switch system call */
+1: mfspr r12,SPRN_SRR1
+ xori r12,r12,MSR_LE
+ mtspr SPRN_SRR1,r12
+ rfid /* return to userspace */
+ b .
+
STD_EXCEPTION_PSERIES(0xd00, single_step)
STD_EXCEPTION_PSERIES(0xe00, trap_0e)
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index 425616f92d1..2f73f705d56 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -307,6 +307,7 @@ void do_IRQ(struct pt_regs *regs)
if (curtp != irqtp) {
struct irq_desc *desc = irq_desc + irq;
void *handler = desc->handle_irq;
+ unsigned long saved_sp_limit = current->thread.ksp_limit;
if (handler == NULL)
handler = &__do_IRQ;
irqtp->task = curtp->task;
@@ -319,7 +320,10 @@ void do_IRQ(struct pt_regs *regs)
(irqtp->preempt_count & ~SOFTIRQ_MASK) |
(curtp->preempt_count & SOFTIRQ_MASK);
+ current->thread.ksp_limit = (unsigned long)irqtp +
+ _ALIGN_UP(sizeof(struct thread_info), 16);
call_handle_irq(irq, desc, irqtp, handler);
+ current->thread.ksp_limit = saved_sp_limit;
irqtp->task = NULL;
@@ -352,9 +356,7 @@ void __init init_IRQ(void)
{
if (ppc_md.init_IRQ)
ppc_md.init_IRQ();
-#ifdef CONFIG_PPC64
irq_ctx_init();
-#endif
}
@@ -383,11 +385,15 @@ void irq_ctx_init(void)
static inline void do_softirq_onstack(void)
{
struct thread_info *curtp, *irqtp;
+ unsigned long saved_sp_limit = current->thread.ksp_limit;
curtp = current_thread_info();
irqtp = softirq_ctx[smp_processor_id()];
irqtp->task = curtp->task;
+ current->thread.ksp_limit = (unsigned long)irqtp +
+ _ALIGN_UP(sizeof(struct thread_info), 16);
call_do_softirq(irqtp);
+ current->thread.ksp_limit = saved_sp_limit;
irqtp->task = NULL;
}
diff --git a/arch/powerpc/kernel/lparcfg.c b/arch/powerpc/kernel/lparcfg.c
index 1ffacc698ff..1e656b43ad7 100644
--- a/arch/powerpc/kernel/lparcfg.c
+++ b/arch/powerpc/kernel/lparcfg.c
@@ -591,10 +591,8 @@ int __init lparcfg_init(void)
!firmware_has_feature(FW_FEATURE_ISERIES))
mode |= S_IWUSR;
- ent = create_proc_entry("ppc64/lparcfg", mode, NULL);
- if (ent) {
- ent->proc_fops = &lparcfg_fops;
- } else {
+ ent = proc_create("ppc64/lparcfg", mode, NULL, &lparcfg_fops);
+ if (!ent) {
printk(KERN_ERR "Failed to create ppc64/lparcfg\n");
return -EIO;
}
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 92ccc6fcc5b..89aaaa6f356 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -32,6 +32,31 @@
.text
+#ifdef CONFIG_IRQSTACKS
+_GLOBAL(call_do_softirq)
+ mflr r0
+ stw r0,4(r1)
+ stwu r1,THREAD_SIZE-STACK_FRAME_OVERHEAD(r3)
+ mr r1,r3
+ bl __do_softirq
+ lwz r1,0(r1)
+ lwz r0,4(r1)
+ mtlr r0
+ blr
+
+_GLOBAL(call_handle_irq)
+ mflr r0
+ stw r0,4(r1)
+ mtctr r6
+ stwu r1,THREAD_SIZE-STACK_FRAME_OVERHEAD(r5)
+ mr r1,r5
+ bctrl
+ lwz r1,0(r1)
+ lwz r0,4(r1)
+ mtlr r0
+ blr
+#endif /* CONFIG_IRQSTACKS */
+
/*
* This returns the high 64 bits of the product of two 64-bit numbers.
*/
diff --git a/arch/powerpc/kernel/proc_ppc64.c b/arch/powerpc/kernel/proc_ppc64.c
index f78dfce1b77..c647ddef40d 100644
--- a/arch/powerpc/kernel/proc_ppc64.c
+++ b/arch/powerpc/kernel/proc_ppc64.c
@@ -68,12 +68,11 @@ static int __init proc_ppc64_init(void)
{
struct proc_dir_entry *pde;
- pde = create_proc_entry("ppc64/systemcfg", S_IFREG|S_IRUGO, NULL);
+ pde = proc_create_data("ppc64/systemcfg", S_IFREG|S_IRUGO, NULL,
+ &page_map_fops, vdso_data);
if (!pde)
return 1;
- pde->data = vdso_data;
pde->size = PAGE_SIZE;
- pde->proc_fops = &page_map_fops;
return 0;
}
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 6caad17ea72..7de41c3948e 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -589,6 +589,8 @@ int copy_thread(int nr, unsigned long clone_flags, unsigned long usp,
kregs = (struct pt_regs *) sp;
sp -= STACK_FRAME_OVERHEAD;
p->thread.ksp = sp;
+ p->thread.ksp_limit = (unsigned long)task_stack_page(p) +
+ _ALIGN_UP(sizeof(struct thread_info), 16);
#ifdef CONFIG_PPC64
if (cpu_has_feature(CPU_FTR_SLB)) {
diff --git a/arch/powerpc/kernel/rio.c b/arch/powerpc/kernel/rio.c
deleted file mode 100644
index 29487fedfc7..00000000000
--- a/arch/powerpc/kernel/rio.c
+++ /dev/null
@@ -1,52 +0,0 @@
-/*
- * RapidIO PPC32 support
- *
- * Copyright 2005 MontaVista Software, Inc.
- * Matt Porter <mporter@kernel.crashing.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- */
-
-#include <linux/init.h>
-#include <linux/kernel.h>
-#include <linux/rio.h>
-
-#include <asm/rio.h>
-
-/**
- * platform_rio_init - Do platform specific RIO init
- *
- * Any platform specific initialization of RapdIO
- * hardware is done here as well as registration
- * of any active master ports in the system.
- */
-void __attribute__ ((weak))
- platform_rio_init(void)
-{
- printk(KERN_WARNING "RIO: No platform_rio_init() present\n");
-}
-
-/**
- * ppc_rio_init - Do PPC32 RIO init
- *
- * Calls platform-specific RIO init code and then calls
- * rio_init_mports() to initialize any master ports that
- * have been registered with the RIO subsystem.
- */
-static int __init ppc_rio_init(void)
-{
- printk(KERN_INFO "RIO: RapidIO init\n");
-
- /* Platform specific initialization */
- platform_rio_init();
-
- /* Enumerate all registered ports */
- rio_init_mports();
-
- return 0;
-}
-
-subsys_initcall(ppc_rio_init);
diff --git a/arch/powerpc/kernel/rtas-proc.c b/arch/powerpc/kernel/rtas-proc.c
index f2e3bc714d7..f9c6abc84a9 100644
--- a/arch/powerpc/kernel/rtas-proc.c
+++ b/arch/powerpc/kernel/rtas-proc.c
@@ -255,8 +255,6 @@ static void check_location(struct seq_file *m, const char *c);
static int __init proc_rtas_init(void)
{
- struct proc_dir_entry *entry;
-
if (!machine_is(pseries))
return -ENODEV;
@@ -264,35 +262,20 @@ static int __init proc_rtas_init(void)
if (rtas_node == NULL)
return -ENODEV;
- entry = create_proc_entry("ppc64/rtas/progress", S_IRUGO|S_IWUSR, NULL);
- if (entry)
- entry->proc_fops = &ppc_rtas_progress_operations;
-
- entry = create_proc_entry("ppc64/rtas/clock", S_IRUGO|S_IWUSR, NULL);
- if (entry)
- entry->proc_fops = &ppc_rtas_clock_operations;
-
- entry = create_proc_entry("ppc64/rtas/poweron", S_IWUSR|S_IRUGO, NULL);
- if (entry)
- entry->proc_fops = &ppc_rtas_poweron_operations;
-
- entry = create_proc_entry("ppc64/rtas/sensors", S_IRUGO, NULL);
- if (entry)
- entry->proc_fops = &ppc_rtas_sensors_operations;
-
- entry = create_proc_entry("ppc64/rtas/frequency", S_IWUSR|S_IRUGO,
- NULL);
- if (entry)
- entry->proc_fops = &ppc_rtas_tone_freq_operations;
-
- entry = create_proc_entry("ppc64/rtas/volume", S_IWUSR|S_IRUGO, NULL);
- if (entry)
- entry->proc_fops = &ppc_rtas_tone_volume_operations;
-
- entry = create_proc_entry("ppc64/rtas/rmo_buffer", S_IRUSR, NULL);
- if (entry)
- entry->proc_fops = &ppc_rtas_rmo_buf_ops;
-
+ proc_create("ppc64/rtas/progress", S_IRUGO|S_IWUSR, NULL,
+ &ppc_rtas_progress_operations);
+ proc_create("ppc64/rtas/clock", S_IRUGO|S_IWUSR, NULL,
+ &ppc_rtas_clock_operations);
+ proc_create("ppc64/rtas/poweron", S_IWUSR|S_IRUGO, NULL,
+ &ppc_rtas_poweron_operations);
+ proc_create("ppc64/rtas/sensors", S_IRUGO, NULL,
+ &ppc_rtas_sensors_operations);
+ proc_create("ppc64/rtas/frequency", S_IWUSR|S_IRUGO, NULL,
+ &ppc_rtas_tone_freq_operations);
+ proc_create("ppc64/rtas/volume", S_IWUSR|S_IRUGO, NULL,
+ &ppc_rtas_tone_volume_operations);
+ proc_create("ppc64/rtas/rmo_buffer", S_IRUSR, NULL,
+ &ppc_rtas_rmo_buf_ops);
return 0;
}
diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c
index 627f126d184..0a5e22b2272 100644
--- a/arch/powerpc/kernel/rtas_flash.c
+++ b/arch/powerpc/kernel/rtas_flash.c
@@ -704,18 +704,11 @@ static int initialize_flash_pde_data(const char *rtas_call_name,
static struct proc_dir_entry *create_flash_pde(const char *filename,
const struct file_operations *fops)
{
- struct proc_dir_entry *ent = NULL;
-
- ent = create_proc_entry(filename, S_IRUSR | S_IWUSR, NULL);
- if (ent != NULL) {
- ent->proc_fops = fops;
- ent->owner = THIS_MODULE;
- }
-
- return ent;
+ return proc_create(filename, S_IRUSR | S_IWUSR, NULL, fops);
}
static const struct file_operations rtas_flash_operations = {
+ .owner = THIS_MODULE,
.read = rtas_flash_read,
.write = rtas_flash_write,
.open = rtas_excl_open,
@@ -723,6 +716,7 @@ static const struct file_operations rtas_flash_operations = {
};
static const struct file_operations manage_flash_operations = {
+ .owner = THIS_MODULE,
.read = manage_flash_read,
.write = manage_flash_write,
.open = rtas_excl_open,
@@ -730,6 +724,7 @@ static const struct file_operations manage_flash_operations = {
};
static const struct file_operations validate_flash_operations = {
+ .owner = THIS_MODULE,
.read = validate_flash_read,
.write = validate_flash_write,
.open = rtas_excl_open,
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 36f6779c88d..5112a4aa801 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -16,6 +16,7 @@
#include <linux/root_dev.h>
#include <linux/cpu.h>
#include <linux/console.h>
+#include <linux/lmb.h>
#include <asm/io.h>
#include <asm/prom.h>
@@ -229,6 +230,24 @@ int __init ppc_init(void)
arch_initcall(ppc_init);
+#ifdef CONFIG_IRQSTACKS
+static void __init irqstack_early_init(void)
+{
+ unsigned int i;
+
+ /* interrupt stacks must be in lowmem, we get that for free on ppc32
+ * as the lmb is limited to lowmem by LMB_REAL_LIMIT */
+ for_each_possible_cpu(i) {
+ softirq_ctx[i] = (struct thread_info *)
+ __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
+ hardirq_ctx[i] = (struct thread_info *)
+ __va(lmb_alloc(THREAD_SIZE, THREAD_SIZE));
+ }
+}
+#else
+#define irqstack_early_init()
+#endif
+
/* Warning, IO base is not yet inited */
void __init setup_arch(char **cmdline_p)
{
@@ -286,6 +305,8 @@ void __init setup_arch(char **cmdline_p)
init_mm.end_data = (unsigned long) _edata;
init_mm.brk = klimit;
+ irqstack_early_init();
+
/* set up the bootmem stuff with available memory */
do_init_bootmem();
if ( ppc_md.progress ) ppc_md.progress("setup_arch: bootmem", 0x3eab);
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-13 11:58:39 +0000