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-rw-r--r--arch/powerpc/Kconfig1
-rw-r--r--arch/powerpc/Kconfig.debug21
-rw-r--r--arch/powerpc/boot/dts/mpc8313erdb.dts13
-rw-r--r--arch/powerpc/boot/dts/mpc8572ds.dts13
-rw-r--r--arch/powerpc/boot/dts/p2020ds.dts13
-rw-r--r--arch/powerpc/boot/dts/p2020rdb.dts13
-rw-r--r--arch/powerpc/include/asm/pgalloc.h21
-rw-r--r--arch/powerpc/include/asm/thread_info.h2
-rw-r--r--arch/powerpc/kernel/process.c23
-rw-r--r--arch/powerpc/mm/pgtable.c104
-rw-r--r--arch/powerpc/mm/tlb_hash32.c3
-rw-r--r--arch/powerpc/mm/tlb_hash64.c5
-rw-r--r--arch/powerpc/mm/tlb_nohash.c3
13 files changed, 97 insertions, 138 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index a3128ca0fe1..423145a6f7b 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -140,6 +140,7 @@ config PPC
select IRQ_PER_CPU
select GENERIC_IRQ_SHOW
select GENERIC_IRQ_SHOW_LEVEL
+ select HAVE_RCU_TABLE_FREE if SMP
config EARLY_PRINTK
bool
diff --git a/arch/powerpc/Kconfig.debug b/arch/powerpc/Kconfig.debug
index a597dd77b90..e72dcf6a421 100644
--- a/arch/powerpc/Kconfig.debug
+++ b/arch/powerpc/Kconfig.debug
@@ -35,27 +35,6 @@ config DEBUG_STACKOVERFLOW
This option will cause messages to be printed if free stack space
drops below a certain limit.
-config DEBUG_STACK_USAGE
- bool "Stack utilization instrumentation"
- depends on DEBUG_KERNEL
- help
- Enables the display of the minimum amount of free stack which each
- task has ever had available in the sysrq-T and sysrq-P debug output.
-
- This option will slow down process creation somewhat.
-
-config DEBUG_PER_CPU_MAPS
- bool "Debug access to per_cpu maps"
- depends on DEBUG_KERNEL
- depends on SMP
- default n
- ---help---
- Say Y to verify that the per_cpu map being accessed has
- been setup. Adds a fair amount of code to kernel memory
- and decreases performance.
-
- Say N if unsure.
-
config HCALL_STATS
bool "Hypervisor call instrumentation"
depends on PPC_PSERIES && DEBUG_FS && TRACEPOINTS
diff --git a/arch/powerpc/boot/dts/mpc8313erdb.dts b/arch/powerpc/boot/dts/mpc8313erdb.dts
index 761faa7b696..ac1eb320c7b 100644
--- a/arch/powerpc/boot/dts/mpc8313erdb.dts
+++ b/arch/powerpc/boot/dts/mpc8313erdb.dts
@@ -176,6 +176,19 @@
sleep = <&pmc 0x00300000>;
};
+ ptp_clock@24E00 {
+ compatible = "fsl,etsec-ptp";
+ reg = <0x24E00 0xB0>;
+ interrupts = <12 0x8 13 0x8>;
+ interrupt-parent = < &ipic >;
+ fsl,tclk-period = <10>;
+ fsl,tmr-prsc = <100>;
+ fsl,tmr-add = <0x999999A4>;
+ fsl,tmr-fiper1 = <0x3B9AC9F6>;
+ fsl,tmr-fiper2 = <0x00018696>;
+ fsl,max-adj = <659999998>;
+ };
+
enet0: ethernet@24000 {
#address-cells = <1>;
#size-cells = <1>;
diff --git a/arch/powerpc/boot/dts/mpc8572ds.dts b/arch/powerpc/boot/dts/mpc8572ds.dts
index cafc1285c14..f6c04d25e91 100644
--- a/arch/powerpc/boot/dts/mpc8572ds.dts
+++ b/arch/powerpc/boot/dts/mpc8572ds.dts
@@ -324,6 +324,19 @@
};
};
+ ptp_clock@24E00 {
+ compatible = "fsl,etsec-ptp";
+ reg = <0x24E00 0xB0>;
+ interrupts = <68 2 69 2 70 2 71 2>;
+ interrupt-parent = < &mpic >;
+ fsl,tclk-period = <5>;
+ fsl,tmr-prsc = <200>;
+ fsl,tmr-add = <0xAAAAAAAB>;
+ fsl,tmr-fiper1 = <0x3B9AC9FB>;
+ fsl,tmr-fiper2 = <0x3B9AC9FB>;
+ fsl,max-adj = <499999999>;
+ };
+
enet0: ethernet@24000 {
#address-cells = <1>;
#size-cells = <1>;
diff --git a/arch/powerpc/boot/dts/p2020ds.dts b/arch/powerpc/boot/dts/p2020ds.dts
index 2bcf3683d22..dae403100f2 100644
--- a/arch/powerpc/boot/dts/p2020ds.dts
+++ b/arch/powerpc/boot/dts/p2020ds.dts
@@ -178,6 +178,19 @@
};
+ ptp_clock@24E00 {
+ compatible = "fsl,etsec-ptp";
+ reg = <0x24E00 0xB0>;
+ interrupts = <68 2 69 2 70 2>;
+ interrupt-parent = < &mpic >;
+ fsl,tclk-period = <5>;
+ fsl,tmr-prsc = <200>;
+ fsl,tmr-add = <0xCCCCCCCD>;
+ fsl,tmr-fiper1 = <0x3B9AC9FB>;
+ fsl,tmr-fiper2 = <0x0001869B>;
+ fsl,max-adj = <249999999>;
+ };
+
enet0: ethernet@24000 {
tbi-handle = <&tbi0>;
phy-handle = <&phy0>;
diff --git a/arch/powerpc/boot/dts/p2020rdb.dts b/arch/powerpc/boot/dts/p2020rdb.dts
index 3782a58f13b..1d7a05f3021 100644
--- a/arch/powerpc/boot/dts/p2020rdb.dts
+++ b/arch/powerpc/boot/dts/p2020rdb.dts
@@ -224,6 +224,19 @@
status = "disabled";
};
+ ptp_clock@24E00 {
+ compatible = "fsl,etsec-ptp";
+ reg = <0x24E00 0xB0>;
+ interrupts = <68 2 69 2 70 2>;
+ interrupt-parent = < &mpic >;
+ fsl,tclk-period = <5>;
+ fsl,tmr-prsc = <200>;
+ fsl,tmr-add = <0xCCCCCCCD>;
+ fsl,tmr-fiper1 = <0x3B9AC9FB>;
+ fsl,tmr-fiper2 = <0x0001869B>;
+ fsl,max-adj = <249999999>;
+ };
+
enet0: ethernet@24000 {
fixed-link = <1 1 1000 0 0>;
phy-connection-type = "rgmii-id";
diff --git a/arch/powerpc/include/asm/pgalloc.h b/arch/powerpc/include/asm/pgalloc.h
index abe8532bd14..bf301ac62f3 100644
--- a/arch/powerpc/include/asm/pgalloc.h
+++ b/arch/powerpc/include/asm/pgalloc.h
@@ -31,14 +31,29 @@ static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
#endif
#ifdef CONFIG_SMP
-extern void pgtable_free_tlb(struct mmu_gather *tlb, void *table, unsigned shift);
-extern void pte_free_finish(void);
+struct mmu_gather;
+extern void tlb_remove_table(struct mmu_gather *, void *);
+
+static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift)
+{
+ unsigned long pgf = (unsigned long)table;
+ BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
+ pgf |= shift;
+ tlb_remove_table(tlb, (void *)pgf);
+}
+
+static inline void __tlb_remove_table(void *_table)
+{
+ void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
+ unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
+
+ pgtable_free(table, shift);
+}
#else /* CONFIG_SMP */
static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, unsigned shift)
{
pgtable_free(table, shift);
}
-static inline void pte_free_finish(void) { }
#endif /* !CONFIG_SMP */
static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage,
diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h
index d8529ef13b2..37c353e8af7 100644
--- a/arch/powerpc/include/asm/thread_info.h
+++ b/arch/powerpc/include/asm/thread_info.h
@@ -139,10 +139,12 @@ static inline struct thread_info *current_thread_info(void)
#define TLF_NAPPING 0 /* idle thread enabled NAP mode */
#define TLF_SLEEPING 1 /* suspend code enabled SLEEP mode */
#define TLF_RESTORE_SIGMASK 2 /* Restore signal mask in do_signal */
+#define TLF_LAZY_MMU 3 /* tlb_batch is active */
#define _TLF_NAPPING (1 << TLF_NAPPING)
#define _TLF_SLEEPING (1 << TLF_SLEEPING)
#define _TLF_RESTORE_SIGMASK (1 << TLF_RESTORE_SIGMASK)
+#define _TLF_LAZY_MMU (1 << TLF_LAZY_MMU)
#ifndef __ASSEMBLY__
#define HAVE_SET_RESTORE_SIGMASK 1
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 095043d7994..91e52df3d81 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -395,6 +395,9 @@ struct task_struct *__switch_to(struct task_struct *prev,
struct thread_struct *new_thread, *old_thread;
unsigned long flags;
struct task_struct *last;
+#ifdef CONFIG_PPC_BOOK3S_64
+ struct ppc64_tlb_batch *batch;
+#endif
#ifdef CONFIG_SMP
/* avoid complexity of lazy save/restore of fpu
@@ -513,7 +516,17 @@ struct task_struct *__switch_to(struct task_struct *prev,
old_thread->accum_tb += (current_tb - start_tb);
new_thread->start_tb = current_tb;
}
-#endif
+#endif /* CONFIG_PPC64 */
+
+#ifdef CONFIG_PPC_BOOK3S_64
+ batch = &__get_cpu_var(ppc64_tlb_batch);
+ if (batch->active) {
+ current_thread_info()->local_flags |= _TLF_LAZY_MMU;
+ if (batch->index)
+ __flush_tlb_pending(batch);
+ batch->active = 0;
+ }
+#endif /* CONFIG_PPC_BOOK3S_64 */
local_irq_save(flags);
@@ -528,6 +541,14 @@ struct task_struct *__switch_to(struct task_struct *prev,
hard_irq_disable();
last = _switch(old_thread, new_thread);
+#ifdef CONFIG_PPC_BOOK3S_64
+ if (current_thread_info()->local_flags & _TLF_LAZY_MMU) {
+ current_thread_info()->local_flags &= ~_TLF_LAZY_MMU;
+ batch = &__get_cpu_var(ppc64_tlb_batch);
+ batch->active = 1;
+ }
+#endif /* CONFIG_PPC_BOOK3S_64 */
+
local_irq_restore(flags);
return last;
diff --git a/arch/powerpc/mm/pgtable.c b/arch/powerpc/mm/pgtable.c
index 6a3997f98df..af40c8768a7 100644
--- a/arch/powerpc/mm/pgtable.c
+++ b/arch/powerpc/mm/pgtable.c
@@ -33,110 +33,6 @@
#include "mmu_decl.h"
-DEFINE_PER_CPU(struct mmu_gather, mmu_gathers);
-
-#ifdef CONFIG_SMP
-
-/*
- * Handle batching of page table freeing on SMP. Page tables are
- * queued up and send to be freed later by RCU in order to avoid
- * freeing a page table page that is being walked without locks
- */
-
-static DEFINE_PER_CPU(struct pte_freelist_batch *, pte_freelist_cur);
-static unsigned long pte_freelist_forced_free;
-
-struct pte_freelist_batch
-{
- struct rcu_head rcu;
- unsigned int index;
- unsigned long tables[0];
-};
-
-#define PTE_FREELIST_SIZE \
- ((PAGE_SIZE - sizeof(struct pte_freelist_batch)) \
- / sizeof(unsigned long))
-
-static void pte_free_smp_sync(void *arg)
-{
- /* Do nothing, just ensure we sync with all CPUs */
-}
-
-/* This is only called when we are critically out of memory
- * (and fail to get a page in pte_free_tlb).
- */
-static void pgtable_free_now(void *table, unsigned shift)
-{
- pte_freelist_forced_free++;
-
- smp_call_function(pte_free_smp_sync, NULL, 1);
-
- pgtable_free(table, shift);
-}
-
-static void pte_free_rcu_callback(struct rcu_head *head)
-{
- struct pte_freelist_batch *batch =
- container_of(head, struct pte_freelist_batch, rcu);
- unsigned int i;
-
- for (i = 0; i < batch->index; i++) {
- void *table = (void *)(batch->tables[i] & ~MAX_PGTABLE_INDEX_SIZE);
- unsigned shift = batch->tables[i] & MAX_PGTABLE_INDEX_SIZE;
-
- pgtable_free(table, shift);
- }
-
- free_page((unsigned long)batch);
-}
-
-static void pte_free_submit(struct pte_freelist_batch *batch)
-{
- call_rcu_sched(&batch->rcu, pte_free_rcu_callback);
-}
-
-void pgtable_free_tlb(struct mmu_gather *tlb, void *table, unsigned shift)
-{
- /* This is safe since tlb_gather_mmu has disabled preemption */
- struct pte_freelist_batch **batchp = &__get_cpu_var(pte_freelist_cur);
- unsigned long pgf;
-
- if (atomic_read(&tlb->mm->mm_users) < 2 ||
- cpumask_equal(mm_cpumask(tlb->mm), cpumask_of(smp_processor_id()))){
- pgtable_free(table, shift);
- return;
- }
-
- if (*batchp == NULL) {
- *batchp = (struct pte_freelist_batch *)__get_free_page(GFP_ATOMIC);
- if (*batchp == NULL) {
- pgtable_free_now(table, shift);
- return;
- }
- (*batchp)->index = 0;
- }
- BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
- pgf = (unsigned long)table | shift;
- (*batchp)->tables[(*batchp)->index++] = pgf;
- if ((*batchp)->index == PTE_FREELIST_SIZE) {
- pte_free_submit(*batchp);
- *batchp = NULL;
- }
-}
-
-void pte_free_finish(void)
-{
- /* This is safe since tlb_gather_mmu has disabled preemption */
- struct pte_freelist_batch **batchp = &__get_cpu_var(pte_freelist_cur);
-
- if (*batchp == NULL)
- return;
- pte_free_submit(*batchp);
- *batchp = NULL;
-}
-
-#endif /* CONFIG_SMP */
-
static inline int is_exec_fault(void)
{
return current->thread.regs && TRAP(current->thread.regs) == 0x400;
diff --git a/arch/powerpc/mm/tlb_hash32.c b/arch/powerpc/mm/tlb_hash32.c
index 690566b66e8..27b863c1494 100644
--- a/arch/powerpc/mm/tlb_hash32.c
+++ b/arch/powerpc/mm/tlb_hash32.c
@@ -71,9 +71,6 @@ void tlb_flush(struct mmu_gather *tlb)
*/
_tlbia();
}
-
- /* Push out batch of freed page tables */
- pte_free_finish();
}
/*
diff --git a/arch/powerpc/mm/tlb_hash64.c b/arch/powerpc/mm/tlb_hash64.c
index c14d09f614f..31f18207970 100644
--- a/arch/powerpc/mm/tlb_hash64.c
+++ b/arch/powerpc/mm/tlb_hash64.c
@@ -155,7 +155,7 @@ void __flush_tlb_pending(struct ppc64_tlb_batch *batch)
void tlb_flush(struct mmu_gather *tlb)
{
- struct ppc64_tlb_batch *tlbbatch = &__get_cpu_var(ppc64_tlb_batch);
+ struct ppc64_tlb_batch *tlbbatch = &get_cpu_var(ppc64_tlb_batch);
/* If there's a TLB batch pending, then we must flush it because the
* pages are going to be freed and we really don't want to have a CPU
@@ -164,8 +164,7 @@ void tlb_flush(struct mmu_gather *tlb)
if (tlbbatch->index)
__flush_tlb_pending(tlbbatch);
- /* Push out batch of freed page tables */
- pte_free_finish();
+ put_cpu_var(ppc64_tlb_batch);
}
/**
diff --git a/arch/powerpc/mm/tlb_nohash.c b/arch/powerpc/mm/tlb_nohash.c
index 2a030d89bbc..0bdad3aecc6 100644
--- a/arch/powerpc/mm/tlb_nohash.c
+++ b/arch/powerpc/mm/tlb_nohash.c
@@ -299,9 +299,6 @@ EXPORT_SYMBOL(flush_tlb_range);
void tlb_flush(struct mmu_gather *tlb)
{
flush_tlb_mm(tlb->mm);
-
- /* Push out batch of freed page tables */
- pte_free_finish();
}
/*
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-30 23:25:41 +0000