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-rw-r--r--arch/powerpc/kernel/head_64.S13
-rw-r--r--arch/powerpc/kernel/head_8xx.S30
-rw-r--r--arch/powerpc/kernel/irq.c1
-rw-r--r--arch/powerpc/kernel/kprobes.c9
-rw-r--r--arch/powerpc/kernel/misc_32.S15
-rw-r--r--arch/powerpc/kernel/pci-common.c8
-rw-r--r--arch/powerpc/kernel/ppc_ksyms.c3
-rw-r--r--arch/powerpc/kernel/process.c16
-rw-r--r--arch/powerpc/kernel/prom.c13
-rw-r--r--arch/powerpc/kernel/ptrace.c10
-rw-r--r--arch/powerpc/kernel/rtas_flash.c2
11 files changed, 93 insertions, 27 deletions
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 11b4f6d9ffc..d3aee08e681 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -1387,12 +1387,14 @@ __secondary_start:
#ifdef CONFIG_PPC_ISERIES
BEGIN_FW_FTR_SECTION
ori r4,r4,MSR_EE
+ li r8,1
+ stb r8,PACAHARDIRQEN(r13)
END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
#endif
BEGIN_FW_FTR_SECTION
- stb r7,PACASOFTIRQEN(r13)
stb r7,PACAHARDIRQEN(r13)
END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES)
+ stb r7,PACASOFTIRQEN(r13)
mtspr SPRN_SRR0,r3
mtspr SPRN_SRR1,r4
@@ -1520,15 +1522,14 @@ _INIT_GLOBAL(start_here_common)
#ifdef CONFIG_PPC_ISERIES
BEGIN_FW_FTR_SECTION
mfmsr r5
- ori r5,r5,MSR_EE /* Hard Enabled */
+ ori r5,r5,MSR_EE /* Hard Enabled on iSeries*/
mtmsrd r5
+ li r5,1
END_FW_FTR_SECTION_IFSET(FW_FEATURE_ISERIES)
#endif
-BEGIN_FW_FTR_SECTION
- stb r5,PACAHARDIRQEN(r13)
-END_FW_FTR_SECTION_IFCLR(FW_FEATURE_ISERIES)
+ stb r5,PACAHARDIRQEN(r13) /* Hard Disabled on others */
- bl .start_kernel
+ bl .start_kernel
/* Not reached */
BUG_OPCODE
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index f7458396cd7..3c9452d4308 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -332,8 +332,18 @@ InstructionTLBMiss:
mfspr r11, SPRN_MD_TWC /* ....and get the pte address */
lwz r10, 0(r11) /* Get the pte */
+#ifdef CONFIG_SWAP
+ /* do not set the _PAGE_ACCESSED bit of a non-present page */
+ andi. r11, r10, _PAGE_PRESENT
+ beq 4f
+ ori r10, r10, _PAGE_ACCESSED
+ mfspr r11, SPRN_MD_TWC /* get the pte address again */
+ stw r10, 0(r11)
+4:
+#else
ori r10, r10, _PAGE_ACCESSED
stw r10, 0(r11)
+#endif
/* The Linux PTE won't go exactly into the MMU TLB.
* Software indicator bits 21, 22 and 28 must be clear.
@@ -398,8 +408,17 @@ DataStoreTLBMiss:
DO_8xx_CPU6(0x3b80, r3)
mtspr SPRN_MD_TWC, r11
- mfspr r11, SPRN_MD_TWC /* get the pte address again */
+#ifdef CONFIG_SWAP
+ /* do not set the _PAGE_ACCESSED bit of a non-present page */
+ andi. r11, r10, _PAGE_PRESENT
+ beq 4f
ori r10, r10, _PAGE_ACCESSED
+4:
+ /* and update pte in table */
+#else
+ ori r10, r10, _PAGE_ACCESSED
+#endif
+ mfspr r11, SPRN_MD_TWC /* get the pte address again */
stw r10, 0(r11)
/* The Linux PTE won't go exactly into the MMU TLB.
@@ -507,7 +526,16 @@ DataTLBError:
/* Update 'changed', among others.
*/
+#ifdef CONFIG_SWAP
+ ori r10, r10, _PAGE_DIRTY|_PAGE_HWWRITE
+ /* do not set the _PAGE_ACCESSED bit of a non-present page */
+ andi. r11, r10, _PAGE_PRESENT
+ beq 4f
+ ori r10, r10, _PAGE_ACCESSED
+4:
+#else
ori r10, r10, _PAGE_DIRTY|_PAGE_ACCESSED|_PAGE_HWWRITE
+#endif
mfspr r11, SPRN_MD_TWC /* Get pte address again */
stw r10, 0(r11) /* and update pte in table */
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index b0e5deb4274..292163f5b39 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -143,7 +143,6 @@ void local_irq_restore(unsigned long en)
*/
if (local_paca->lppaca_ptr->int_dword.any_int)
iseries_handle_interrupts();
- return;
}
/*
diff --git a/arch/powerpc/kernel/kprobes.c b/arch/powerpc/kernel/kprobes.c
index 5338e485571..c176c513566 100644
--- a/arch/powerpc/kernel/kprobes.c
+++ b/arch/powerpc/kernel/kprobes.c
@@ -274,7 +274,7 @@ no_kprobe:
* - When the probed function returns, this probe
* causes the handlers to fire
*/
-void kretprobe_trampoline_holder(void)
+static void __used kretprobe_trampoline_holder(void)
{
asm volatile(".global kretprobe_trampoline\n"
"kretprobe_trampoline:\n"
@@ -284,7 +284,8 @@ void kretprobe_trampoline_holder(void)
/*
* Called when the probe at kretprobe trampoline is hit
*/
-int __kprobes trampoline_probe_handler(struct kprobe *p, struct pt_regs *regs)
+static int __kprobes trampoline_probe_handler(struct kprobe *p,
+ struct pt_regs *regs)
{
struct kretprobe_instance *ri = NULL;
struct hlist_head *head, empty_rp;
@@ -517,12 +518,12 @@ int __kprobes setjmp_pre_handler(struct kprobe *p, struct pt_regs *regs)
return 1;
}
-void __kprobes jprobe_return(void)
+void __used __kprobes jprobe_return(void)
{
asm volatile("trap" ::: "memory");
}
-void __kprobes jprobe_return_end(void)
+static void __used __kprobes jprobe_return_end(void)
{
};
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 5c2e253ddfb..9d2c56621f1 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -785,6 +785,21 @@ _GLOBAL(__lshrdi3)
or r4,r4,r7 # LSW |= t2
blr
+/*
+ * 64-bit comparison: __ucmpdi2(u64 a, u64 b)
+ * Returns 0 if a < b, 1 if a == b, 2 if a > b.
+ */
+_GLOBAL(__ucmpdi2)
+ cmplw r3,r5
+ li r3,1
+ bne 1f
+ cmplw r4,r6
+ beqlr
+1: li r3,0
+ bltlr
+ li r3,2
+ blr
+
_GLOBAL(abs)
srawi r4,r3,31
xor r3,r3,r4
diff --git a/arch/powerpc/kernel/pci-common.c b/arch/powerpc/kernel/pci-common.c
index 980fe32895c..89c83ccb85c 100644
--- a/arch/powerpc/kernel/pci-common.c
+++ b/arch/powerpc/kernel/pci-common.c
@@ -748,7 +748,13 @@ static void __devinit pcibios_fixup_resources(struct pci_dev *dev)
struct resource *res = dev->resource + i;
if (!res->flags)
continue;
- if (res->end == 0xffffffff) {
+ /* On platforms that have PPC_PCI_PROBE_ONLY set, we don't
+ * consider 0 as an unassigned BAR value. It's technically
+ * a valid value, but linux doesn't like it... so when we can
+ * re-assign things, we do so, but if we can't, we keep it
+ * around and hope for the best...
+ */
+ if (res->start == 0 && !(ppc_pci_flags & PPC_PCI_PROBE_ONLY)) {
pr_debug("PCI:%s Resource %d %016llx-%016llx [%x] is unassigned\n",
pci_name(dev), i,
(unsigned long long)res->start,
diff --git a/arch/powerpc/kernel/ppc_ksyms.c b/arch/powerpc/kernel/ppc_ksyms.c
index aa9ff35b0e6..9c98424277a 100644
--- a/arch/powerpc/kernel/ppc_ksyms.c
+++ b/arch/powerpc/kernel/ppc_ksyms.c
@@ -58,6 +58,7 @@ extern void program_check_exception(struct pt_regs *regs);
extern void single_step_exception(struct pt_regs *regs);
extern int sys_sigreturn(struct pt_regs *regs);
+EXPORT_SYMBOL(empty_zero_page);
EXPORT_SYMBOL(clear_pages);
EXPORT_SYMBOL(copy_page);
EXPORT_SYMBOL(ISA_DMA_THRESHOLD);
@@ -149,6 +150,8 @@ long long __lshrdi3(long long, int);
EXPORT_SYMBOL(__ashrdi3);
EXPORT_SYMBOL(__ashldi3);
EXPORT_SYMBOL(__lshrdi3);
+int __ucmpdi2(unsigned long long, unsigned long long);
+EXPORT_SYMBOL(__ucmpdi2);
#endif
EXPORT_SYMBOL(memcpy);
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 4846bf543a8..4ec60552150 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -241,8 +241,12 @@ void discard_lazy_cpu_state(void)
}
#endif /* CONFIG_SMP */
+static DEFINE_PER_CPU(unsigned long, current_dabr);
+
int set_dabr(unsigned long dabr)
{
+ __get_cpu_var(current_dabr) = dabr;
+
#ifdef CONFIG_PPC_MERGE /* XXX for now */
if (ppc_md.set_dabr)
return ppc_md.set_dabr(dabr);
@@ -259,8 +263,6 @@ int set_dabr(unsigned long dabr)
DEFINE_PER_CPU(struct cpu_usage, cpu_usage_array);
#endif
-static DEFINE_PER_CPU(unsigned long, current_dabr);
-
struct task_struct *__switch_to(struct task_struct *prev,
struct task_struct *new)
{
@@ -325,10 +327,8 @@ struct task_struct *__switch_to(struct task_struct *prev,
#endif /* CONFIG_SMP */
- if (unlikely(__get_cpu_var(current_dabr) != new->thread.dabr)) {
+ if (unlikely(__get_cpu_var(current_dabr) != new->thread.dabr))
set_dabr(new->thread.dabr);
- __get_cpu_var(current_dabr) = new->thread.dabr;
- }
new_thread = &new->thread;
old_thread = &current->thread;
@@ -353,6 +353,12 @@ struct task_struct *__switch_to(struct task_struct *prev,
account_process_vtime(current);
calculate_steal_time();
+ /*
+ * We can't take a PMU exception inside _switch() since there is a
+ * window where the kernel stack SLB and the kernel stack are out
+ * of sync. Hard disable here.
+ */
+ hard_irq_disable();
last = _switch(old_thread, new_thread);
local_irq_restore(flags);
diff --git a/arch/powerpc/kernel/prom.c b/arch/powerpc/kernel/prom.c
index 8b5efbce8d9..eac97f48b9b 100644
--- a/arch/powerpc/kernel/prom.c
+++ b/arch/powerpc/kernel/prom.c
@@ -865,12 +865,12 @@ static int __init early_init_dt_scan_root(unsigned long node,
return 1;
}
-static unsigned long __init dt_mem_next_cell(int s, cell_t **cellp)
+static u64 __init dt_mem_next_cell(int s, cell_t **cellp)
{
cell_t *p = *cellp;
*cellp = p + s;
- return of_read_ulong(p, s);
+ return of_read_number(p, s);
}
#ifdef CONFIG_PPC_PSERIES
@@ -883,8 +883,8 @@ static unsigned long __init dt_mem_next_cell(int s, cell_t **cellp)
static int __init early_init_dt_scan_drconf_memory(unsigned long node)
{
cell_t *dm, *ls;
- unsigned long l, n;
- unsigned long base, size, lmb_size, flags;
+ unsigned long l, n, flags;
+ u64 base, size, lmb_size;
ls = (cell_t *)of_get_flat_dt_prop(node, "ibm,lmb-size", &l);
if (ls == NULL || l < dt_root_size_cells * sizeof(cell_t))
@@ -959,14 +959,15 @@ static int __init early_init_dt_scan_memory(unsigned long node,
uname, l, reg[0], reg[1], reg[2], reg[3]);
while ((endp - reg) >= (dt_root_addr_cells + dt_root_size_cells)) {
- unsigned long base, size;
+ u64 base, size;
base = dt_mem_next_cell(dt_root_addr_cells, &reg);
size = dt_mem_next_cell(dt_root_size_cells, &reg);
if (size == 0)
continue;
- DBG(" - %lx , %lx\n", base, size);
+ DBG(" - %llx , %llx\n", (unsigned long long)base,
+ (unsigned long long)size);
#ifdef CONFIG_PPC64
if (iommu_is_off) {
if (base >= 0x80000000ul)
diff --git a/arch/powerpc/kernel/ptrace.c b/arch/powerpc/kernel/ptrace.c
index 7673e986573..2a9fe97e452 100644
--- a/arch/powerpc/kernel/ptrace.c
+++ b/arch/powerpc/kernel/ptrace.c
@@ -530,15 +530,21 @@ static int gpr32_set(struct task_struct *target,
--count;
}
- if (kbuf)
+ if (kbuf) {
for (; count > 0 && pos <= PT_MAX_PUT_REG; --count)
regs[pos++] = *k++;
- else
+ for (; count > 0 && pos < PT_TRAP; --count, ++pos)
+ ++k;
+ } else {
for (; count > 0 && pos <= PT_MAX_PUT_REG; --count) {
if (__get_user(reg, u++))
return -EFAULT;
regs[pos++] = reg;
}
+ for (; count > 0 && pos < PT_TRAP; --count, ++pos)
+ if (__get_user(reg, u++))
+ return -EFAULT;
+ }
if (count > 0 && pos == PT_TRAP) {
if (kbuf)
diff --git a/arch/powerpc/kernel/rtas_flash.c b/arch/powerpc/kernel/rtas_flash.c
index f2276593f41..538baf46f15 100644
--- a/arch/powerpc/kernel/rtas_flash.c
+++ b/arch/powerpc/kernel/rtas_flash.c
@@ -356,7 +356,7 @@ static int rtas_excl_open(struct inode *inode, struct file *file)
/* Enforce exclusive open with use count of PDE */
spin_lock(&flash_file_open_lock);
- if (atomic_read(&dp->count) > 1) {
+ if (atomic_read(&dp->count) > 2) {
spin_unlock(&flash_file_open_lock);
return -EBUSY;
}
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-03-27 12:14:04 +0000