[PATCH v1 01/16] powerpc: CONFIG_THREAD_INFO_IN_TASK series
From: Christophe Leroy
Date: Fri Feb 08 2019 - 07:53:37 EST
This patch is a squashed version of the
CONFIG_THREAD_INFO_IN_TASK series to make building robots
happy until that serie appears in powerpc/next.
Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/Makefile | 7 ++
arch/powerpc/include/asm/asm-prototypes.h | 4 +-
arch/powerpc/include/asm/book3s/64/mmu-hash.h | 2 +-
arch/powerpc/include/asm/exception-64s.h | 4 +-
arch/powerpc/include/asm/irq.h | 18 ++--
arch/powerpc/include/asm/livepatch.h | 7 +-
arch/powerpc/include/asm/processor.h | 105 ++---------------------
arch/powerpc/include/asm/ptrace.h | 2 +-
arch/powerpc/include/asm/reg.h | 2 +-
arch/powerpc/include/asm/smp.h | 17 +++-
arch/powerpc/include/asm/task_size_32.h | 21 +++++
arch/powerpc/include/asm/task_size_64.h | 79 +++++++++++++++++
arch/powerpc/include/asm/thread_info.h | 19 -----
arch/powerpc/kernel/asm-offsets.c | 12 ++-
arch/powerpc/kernel/entry_32.S | 80 ++++++-----------
arch/powerpc/kernel/entry_64.S | 12 +--
arch/powerpc/kernel/epapr_hcalls.S | 5 +-
arch/powerpc/kernel/exceptions-64e.S | 13 +--
arch/powerpc/kernel/exceptions-64s.S | 2 +-
arch/powerpc/kernel/head_32.S | 14 +--
arch/powerpc/kernel/head_40x.S | 4 +-
arch/powerpc/kernel/head_44x.S | 8 +-
arch/powerpc/kernel/head_64.S | 1 +
arch/powerpc/kernel/head_8xx.S | 2 +-
arch/powerpc/kernel/head_booke.h | 12 +--
arch/powerpc/kernel/head_fsl_booke.S | 16 ++--
arch/powerpc/kernel/idle_6xx.S | 8 +-
arch/powerpc/kernel/idle_book3e.S | 2 +-
arch/powerpc/kernel/idle_e500.S | 8 +-
arch/powerpc/kernel/idle_power4.S | 2 +-
arch/powerpc/kernel/irq.c | 114 +++----------------------
arch/powerpc/kernel/kgdb.c | 28 ------
arch/powerpc/kernel/machine_kexec_64.c | 6 +-
arch/powerpc/kernel/misc_32.S | 17 ++--
arch/powerpc/kernel/process.c | 63 ++++++++------
arch/powerpc/kernel/setup-common.c | 2 +-
arch/powerpc/kernel/setup_32.c | 26 +++---
arch/powerpc/kernel/setup_64.c | 51 +++--------
arch/powerpc/kernel/smp.c | 16 ++--
arch/powerpc/kernel/stacktrace.c | 29 ++++++-
arch/powerpc/kernel/trace/ftrace_64_mprofile.S | 6 +-
arch/powerpc/kvm/book3s_hv_hmi.c | 1 +
arch/powerpc/mm/hash_low_32.S | 14 ++-
arch/powerpc/net/bpf_jit32.h | 5 +-
arch/powerpc/sysdev/6xx-suspend.S | 5 +-
arch/powerpc/xmon/xmon.c | 2 +-
47 files changed, 367 insertions(+), 507 deletions(-)
create mode 100644 arch/powerpc/include/asm/task_size_32.h
create mode 100644 arch/powerpc/include/asm/task_size_64.h
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 08908219fba9..3f237ffa0649 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -241,6 +241,7 @@ config PPC
select RTC_LIB
select SPARSE_IRQ
select SYSCTL_EXCEPTION_TRACE
+ select THREAD_INFO_IN_TASK
select VIRT_TO_BUS if !PPC64
#
# Please keep this list sorted alphabetically.
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index ac033341ed55..7de49889bd5d 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -427,6 +427,13 @@ else
endif
endif
+ifdef CONFIG_SMP
+prepare: task_cpu_prepare
+
+task_cpu_prepare: prepare0
+ $(eval KBUILD_CFLAGS += -D_TASK_CPU=$(shell awk '{if ($$2 == "TASK_CPU") print $$3;}' include/generated/asm-offsets.h))
+endif
+
# Check toolchain versions:
# - gcc-4.6 is the minimum kernel-wide version so nothing required.
checkbin:
diff --git a/arch/powerpc/include/asm/asm-prototypes.h b/arch/powerpc/include/asm/asm-prototypes.h
index 1d911f68a23b..1484df6779ab 100644
--- a/arch/powerpc/include/asm/asm-prototypes.h
+++ b/arch/powerpc/include/asm/asm-prototypes.h
@@ -23,8 +23,8 @@
#include <uapi/asm/ucontext.h>
/* SMP */
-extern struct thread_info *current_set[NR_CPUS];
-extern struct thread_info *secondary_ti;
+extern struct task_struct *current_set[NR_CPUS];
+extern struct task_struct *secondary_current;
void start_secondary(void *unused);
/* kexec */
diff --git a/arch/powerpc/include/asm/book3s/64/mmu-hash.h b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
index 12e522807f9f..a28a28079edb 100644
--- a/arch/powerpc/include/asm/book3s/64/mmu-hash.h
+++ b/arch/powerpc/include/asm/book3s/64/mmu-hash.h
@@ -23,7 +23,7 @@
*/
#include <asm/book3s/64/pgtable.h>
#include <asm/bug.h>
-#include <asm/processor.h>
+#include <asm/task_size_64.h>
#include <asm/cpu_has_feature.h>
/*
diff --git a/arch/powerpc/include/asm/exception-64s.h b/arch/powerpc/include/asm/exception-64s.h
index 3b4767ed3ec5..f0f0ff192e87 100644
--- a/arch/powerpc/include/asm/exception-64s.h
+++ b/arch/powerpc/include/asm/exception-64s.h
@@ -671,7 +671,7 @@ END_FTR_SECTION_NESTED(ftr,ftr,943)
#define RUNLATCH_ON \
BEGIN_FTR_SECTION \
- CURRENT_THREAD_INFO(r3, r1); \
+ ld r3, PACA_CURRENT_TI(r13); \
ld r4,TI_LOCAL_FLAGS(r3); \
andi. r0,r4,_TLF_RUNLATCH; \
beql ppc64_runlatch_on_trampoline; \
@@ -721,7 +721,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_CTRL)
#ifdef CONFIG_PPC_970_NAP
#define FINISH_NAP \
BEGIN_FTR_SECTION \
- CURRENT_THREAD_INFO(r11, r1); \
+ ld r11, PACA_CURRENT_TI(r13); \
ld r9,TI_LOCAL_FLAGS(r11); \
andi. r10,r9,_TLF_NAPPING; \
bnel power4_fixup_nap; \
diff --git a/arch/powerpc/include/asm/irq.h b/arch/powerpc/include/asm/irq.h
index ee39ce56b2a2..c91a60cda4fa 100644
--- a/arch/powerpc/include/asm/irq.h
+++ b/arch/powerpc/include/asm/irq.h
@@ -48,23 +48,19 @@ struct pt_regs;
* Per-cpu stacks for handling critical, debug and machine check
* level interrupts.
*/
-extern struct thread_info *critirq_ctx[NR_CPUS];
-extern struct thread_info *dbgirq_ctx[NR_CPUS];
-extern struct thread_info *mcheckirq_ctx[NR_CPUS];
-extern void exc_lvl_ctx_init(void);
-#else
-#define exc_lvl_ctx_init()
+extern void *critirq_ctx[NR_CPUS];
+extern void *dbgirq_ctx[NR_CPUS];
+extern void *mcheckirq_ctx[NR_CPUS];
#endif
/*
* Per-cpu stacks for handling hard and soft interrupts.
*/
-extern struct thread_info *hardirq_ctx[NR_CPUS];
-extern struct thread_info *softirq_ctx[NR_CPUS];
+extern void *hardirq_ctx[NR_CPUS];
+extern void *softirq_ctx[NR_CPUS];
-extern void irq_ctx_init(void);
-extern void call_do_softirq(struct thread_info *tp);
-extern void call_do_irq(struct pt_regs *regs, struct thread_info *tp);
+void call_do_softirq(void *sp);
+void call_do_irq(struct pt_regs *regs, void *sp);
extern void do_IRQ(struct pt_regs *regs);
extern void __init init_IRQ(void);
extern void __do_irq(struct pt_regs *regs);
diff --git a/arch/powerpc/include/asm/livepatch.h b/arch/powerpc/include/asm/livepatch.h
index 47a03b9b528b..5070df19d463 100644
--- a/arch/powerpc/include/asm/livepatch.h
+++ b/arch/powerpc/include/asm/livepatch.h
@@ -21,6 +21,7 @@
#include <linux/module.h>
#include <linux/ftrace.h>
+#include <linux/sched/task_stack.h>
#ifdef CONFIG_LIVEPATCH
static inline int klp_check_compiler_support(void)
@@ -43,13 +44,13 @@ static inline unsigned long klp_get_ftrace_location(unsigned long faddr)
return ftrace_location_range(faddr, faddr + 16);
}
-static inline void klp_init_thread_info(struct thread_info *ti)
+static inline void klp_init_thread_info(struct task_struct *p)
{
/* + 1 to account for STACK_END_MAGIC */
- ti->livepatch_sp = (unsigned long *)(ti + 1) + 1;
+ task_thread_info(p)->livepatch_sp = end_of_stack(p) + 1;
}
#else
-static void klp_init_thread_info(struct thread_info *ti) { }
+static inline void klp_init_thread_info(struct task_struct *p) { }
#endif /* CONFIG_LIVEPATCH */
#endif /* _ASM_POWERPC_LIVEPATCH_H */
diff --git a/arch/powerpc/include/asm/processor.h b/arch/powerpc/include/asm/processor.h
index ee58526cb6c2..ba2f0bc680e4 100644
--- a/arch/powerpc/include/asm/processor.h
+++ b/arch/powerpc/include/asm/processor.h
@@ -40,7 +40,7 @@
#ifndef __ASSEMBLY__
#include <linux/types.h>
-#include <asm/thread_info.h>
+#include <linux/thread_info.h>
#include <asm/ptrace.h>
#include <asm/hw_breakpoint.h>
@@ -77,105 +77,15 @@ extern int _chrp_type;
#ifdef __KERNEL__
-struct task_struct;
-void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
-void release_thread(struct task_struct *);
-
-#ifdef CONFIG_PPC32
-
-#if CONFIG_TASK_SIZE > CONFIG_KERNEL_START
-#error User TASK_SIZE overlaps with KERNEL_START address
-#endif
-#define TASK_SIZE (CONFIG_TASK_SIZE)
-
-/* This decides where the kernel will search for a free chunk of vm
- * space during mmap's.
- */
-#define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3)
-#endif
-
#ifdef CONFIG_PPC64
-/*
- * 64-bit user address space can have multiple limits
- * For now supported values are:
- */
-#define TASK_SIZE_64TB (0x0000400000000000UL)
-#define TASK_SIZE_128TB (0x0000800000000000UL)
-#define TASK_SIZE_512TB (0x0002000000000000UL)
-#define TASK_SIZE_1PB (0x0004000000000000UL)
-#define TASK_SIZE_2PB (0x0008000000000000UL)
-/*
- * With 52 bits in the address we can support
- * upto 4PB of range.
- */
-#define TASK_SIZE_4PB (0x0010000000000000UL)
-
-/*
- * For now 512TB is only supported with book3s and 64K linux page size.
- */
-#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_64K_PAGES)
-/*
- * Max value currently used:
- */
-#define TASK_SIZE_USER64 TASK_SIZE_4PB
-#define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_128TB
-#define TASK_CONTEXT_SIZE TASK_SIZE_512TB
-#else
-#define TASK_SIZE_USER64 TASK_SIZE_64TB
-#define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_64TB
-/*
- * We don't need to allocate extended context ids for 4K page size, because
- * we limit the max effective address on this config to 64TB.
- */
-#define TASK_CONTEXT_SIZE TASK_SIZE_64TB
-#endif
-
-/*
- * 32-bit user address space is 4GB - 1 page
- * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT
- */
-#define TASK_SIZE_USER32 (0x0000000100000000UL - (1*PAGE_SIZE))
-
-#define TASK_SIZE_OF(tsk) (test_tsk_thread_flag(tsk, TIF_32BIT) ? \
- TASK_SIZE_USER32 : TASK_SIZE_USER64)
-#define TASK_SIZE TASK_SIZE_OF(current)
-/* This decides where the kernel will search for a free chunk of vm
- * space during mmap's.
- */
-#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))
-#define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(DEFAULT_MAP_WINDOW_USER64 / 4))
-
-#define TASK_UNMAPPED_BASE ((is_32bit_task()) ? \
- TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64 )
-#endif
-
-/*
- * Initial task size value for user applications. For book3s 64 we start
- * with 128TB and conditionally enable upto 512TB
- */
-#ifdef CONFIG_PPC_BOOK3S_64
-#define DEFAULT_MAP_WINDOW ((is_32bit_task()) ? \
- TASK_SIZE_USER32 : DEFAULT_MAP_WINDOW_USER64)
+#include <asm/task_size_64.h>
#else
-#define DEFAULT_MAP_WINDOW TASK_SIZE
+#include <asm/task_size_32.h>
#endif
-#ifdef __powerpc64__
-
-#define STACK_TOP_USER64 DEFAULT_MAP_WINDOW_USER64
-#define STACK_TOP_USER32 TASK_SIZE_USER32
-
-#define STACK_TOP (is_32bit_task() ? \
- STACK_TOP_USER32 : STACK_TOP_USER64)
-
-#define STACK_TOP_MAX TASK_SIZE_USER64
-
-#else /* __powerpc64__ */
-
-#define STACK_TOP TASK_SIZE
-#define STACK_TOP_MAX STACK_TOP
-
-#endif /* __powerpc64__ */
+struct task_struct;
+void start_thread(struct pt_regs *regs, unsigned long fdptr, unsigned long sp);
+void release_thread(struct task_struct *);
typedef struct {
unsigned long seg;
@@ -357,8 +267,7 @@ struct thread_struct {
#define ARCH_MIN_TASKALIGN 16
#define INIT_SP (sizeof(init_stack) + (unsigned long) &init_stack)
-#define INIT_SP_LIMIT \
- (_ALIGN_UP(sizeof(init_thread_info), 16) + (unsigned long) &init_stack)
+#define INIT_SP_LIMIT ((unsigned long)&init_stack)
#ifdef CONFIG_SPE
#define SPEFSCR_INIT \
diff --git a/arch/powerpc/include/asm/ptrace.h b/arch/powerpc/include/asm/ptrace.h
index 0b8a735b6d85..64271e562fed 100644
--- a/arch/powerpc/include/asm/ptrace.h
+++ b/arch/powerpc/include/asm/ptrace.h
@@ -157,7 +157,7 @@ extern int ptrace_put_reg(struct task_struct *task, int regno,
unsigned long data);
#define current_pt_regs() \
- ((struct pt_regs *)((unsigned long)current_thread_info() + THREAD_SIZE) - 1)
+ ((struct pt_regs *)((unsigned long)task_stack_page(current) + THREAD_SIZE) - 1)
/*
* We use the least-significant bit of the trap field to indicate
* whether we have saved the full set of registers, or only a
diff --git a/arch/powerpc/include/asm/reg.h b/arch/powerpc/include/asm/reg.h
index 1c98ef1f2d5b..581e61db2dcf 100644
--- a/arch/powerpc/include/asm/reg.h
+++ b/arch/powerpc/include/asm/reg.h
@@ -1062,7 +1062,7 @@
* - SPRG9 debug exception scratch
*
* All 32-bit:
- * - SPRG3 current thread_info pointer
+ * - SPRG3 current thread_struct physical addr pointer
* (virtual on BookE, physical on others)
*
* 32-bit classic:
diff --git a/arch/powerpc/include/asm/smp.h b/arch/powerpc/include/asm/smp.h
index 41695745032c..0de717e16dd6 100644
--- a/arch/powerpc/include/asm/smp.h
+++ b/arch/powerpc/include/asm/smp.h
@@ -83,7 +83,22 @@ int is_cpu_dead(unsigned int cpu);
/* 32-bit */
extern int smp_hw_index[];
-#define raw_smp_processor_id() (current_thread_info()->cpu)
+/*
+ * This is particularly ugly: it appears we can't actually get the definition
+ * of task_struct here, but we need access to the CPU this task is running on.
+ * Instead of using task_struct we're using _TASK_CPU which is extracted from
+ * asm-offsets.h by kbuild to get the current processor ID.
+ *
+ * This also needs to be safeguarded when building asm-offsets.s because at
+ * that time _TASK_CPU is not defined yet. It could have been guarded by
+ * _TASK_CPU itself, but we want the build to fail if _TASK_CPU is missing
+ * when building something else than asm-offsets.s
+ */
+#ifdef GENERATING_ASM_OFFSETS
+#define raw_smp_processor_id() (0)
+#else
+#define raw_smp_processor_id() (*(unsigned int *)((void *)current + _TASK_CPU))
+#endif
#define hard_smp_processor_id() (smp_hw_index[smp_processor_id()])
static inline int get_hard_smp_processor_id(int cpu)
diff --git a/arch/powerpc/include/asm/task_size_32.h b/arch/powerpc/include/asm/task_size_32.h
new file mode 100644
index 000000000000..de7290ee770f
--- /dev/null
+++ b/arch/powerpc/include/asm/task_size_32.h
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_TASK_SIZE_32_H
+#define _ASM_POWERPC_TASK_SIZE_32_H
+
+#if CONFIG_TASK_SIZE > CONFIG_KERNEL_START
+#error User TASK_SIZE overlaps with KERNEL_START address
+#endif
+
+#define TASK_SIZE (CONFIG_TASK_SIZE)
+
+/*
+ * This decides where the kernel will search for a free chunk of vm space during
+ * mmap's.
+ */
+#define TASK_UNMAPPED_BASE (TASK_SIZE / 8 * 3)
+
+#define DEFAULT_MAP_WINDOW TASK_SIZE
+#define STACK_TOP TASK_SIZE
+#define STACK_TOP_MAX STACK_TOP
+
+#endif /* _ASM_POWERPC_TASK_SIZE_32_H */
diff --git a/arch/powerpc/include/asm/task_size_64.h b/arch/powerpc/include/asm/task_size_64.h
new file mode 100644
index 000000000000..eab4779f6b84
--- /dev/null
+++ b/arch/powerpc/include/asm/task_size_64.h
@@ -0,0 +1,79 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _ASM_POWERPC_TASK_SIZE_64_H
+#define _ASM_POWERPC_TASK_SIZE_64_H
+
+/*
+ * 64-bit user address space can have multiple limits
+ * For now supported values are:
+ */
+#define TASK_SIZE_64TB (0x0000400000000000UL)
+#define TASK_SIZE_128TB (0x0000800000000000UL)
+#define TASK_SIZE_512TB (0x0002000000000000UL)
+#define TASK_SIZE_1PB (0x0004000000000000UL)
+#define TASK_SIZE_2PB (0x0008000000000000UL)
+
+/*
+ * With 52 bits in the address we can support up to 4PB of range.
+ */
+#define TASK_SIZE_4PB (0x0010000000000000UL)
+
+/*
+ * For now 512TB is only supported with book3s and 64K linux page size.
+ */
+#if defined(CONFIG_PPC_BOOK3S_64) && defined(CONFIG_PPC_64K_PAGES)
+/*
+ * Max value currently used:
+ */
+#define TASK_SIZE_USER64 TASK_SIZE_4PB
+#define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_128TB
+#define TASK_CONTEXT_SIZE TASK_SIZE_512TB
+#else
+#define TASK_SIZE_USER64 TASK_SIZE_64TB
+#define DEFAULT_MAP_WINDOW_USER64 TASK_SIZE_64TB
+
+/*
+ * We don't need to allocate extended context ids for 4K page size, because we
+ * limit the max effective address on this config to 64TB.
+ */
+#define TASK_CONTEXT_SIZE TASK_SIZE_64TB
+#endif
+
+/*
+ * 32-bit user address space is 4GB - 1 page
+ * (this 1 page is needed so referencing of 0xFFFFFFFF generates EFAULT
+ */
+#define TASK_SIZE_USER32 (0x0000000100000000UL - (1 * PAGE_SIZE))
+
+#define TASK_SIZE_OF(tsk) \
+ (test_tsk_thread_flag(tsk, TIF_32BIT) ? TASK_SIZE_USER32 : \
+ TASK_SIZE_USER64)
+
+#define TASK_SIZE TASK_SIZE_OF(current)
+
+#define TASK_UNMAPPED_BASE_USER32 (PAGE_ALIGN(TASK_SIZE_USER32 / 4))
+#define TASK_UNMAPPED_BASE_USER64 (PAGE_ALIGN(DEFAULT_MAP_WINDOW_USER64 / 4))
+
+/*
+ * This decides where the kernel will search for a free chunk of vm space during
+ * mmap's.
+ */
+#define TASK_UNMAPPED_BASE \
+ ((is_32bit_task()) ? TASK_UNMAPPED_BASE_USER32 : TASK_UNMAPPED_BASE_USER64)
+
+/*
+ * Initial task size value for user applications. For book3s 64 we start
+ * with 128TB and conditionally enable upto 512TB
+ */
+#ifdef CONFIG_PPC_BOOK3S_64
+#define DEFAULT_MAP_WINDOW \
+ ((is_32bit_task()) ? TASK_SIZE_USER32 : DEFAULT_MAP_WINDOW_USER64)
+#else
+#define DEFAULT_MAP_WINDOW TASK_SIZE
+#endif
+
+#define STACK_TOP_USER64 DEFAULT_MAP_WINDOW_USER64
+#define STACK_TOP_USER32 TASK_SIZE_USER32
+#define STACK_TOP_MAX TASK_SIZE_USER64
+#define STACK_TOP (is_32bit_task() ? STACK_TOP_USER32 : STACK_TOP_USER64)
+
+#endif /* _ASM_POWERPC_TASK_SIZE_64_H */
diff --git a/arch/powerpc/include/asm/thread_info.h b/arch/powerpc/include/asm/thread_info.h
index 544cac0474cb..8e1d0195ac36 100644
--- a/arch/powerpc/include/asm/thread_info.h
+++ b/arch/powerpc/include/asm/thread_info.h
@@ -17,12 +17,6 @@
#define THREAD_SIZE (1 << THREAD_SHIFT)
-#ifdef CONFIG_PPC64
-#define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(clrrdi dest, sp, THREAD_SHIFT)
-#else
-#define CURRENT_THREAD_INFO(dest, sp) stringify_in_c(rlwinm dest, sp, 0, 0, 31-THREAD_SHIFT)
-#endif
-
#ifndef __ASSEMBLY__
#include <linux/cache.h>
#include <asm/processor.h>
@@ -34,8 +28,6 @@
* low level task data.
*/
struct thread_info {
- struct task_struct *task; /* main task structure */
- int cpu; /* cpu we're on */
int preempt_count; /* 0 => preemptable,
<0 => BUG */
unsigned long local_flags; /* private flags for thread */
@@ -58,8 +50,6 @@ struct thread_info {
*/
#define INIT_THREAD_INFO(tsk) \
{ \
- .task = &tsk, \
- .cpu = 0, \
.preempt_count = INIT_PREEMPT_COUNT, \
.flags = 0, \
}
@@ -67,15 +57,6 @@ struct thread_info {
#define THREAD_SIZE_ORDER (THREAD_SHIFT - PAGE_SHIFT)
/* how to get the thread information struct from C */
-static inline struct thread_info *current_thread_info(void)
-{
- unsigned long val;
-
- asm (CURRENT_THREAD_INFO(%0,1) : "=r" (val));
-
- return (struct thread_info *)val;
-}
-
extern int arch_dup_task_struct(struct task_struct *dst, struct task_struct *src);
#ifdef CONFIG_PPC_BOOK3S_64
diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 9ffc72ded73a..7a1b93c5af63 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -13,6 +13,8 @@
* 2 of the License, or (at your option) any later version.
*/
+#define GENERATING_ASM_OFFSETS /* asm/smp.h */
+
#include <linux/compat.h>
#include <linux/signal.h>
#include <linux/sched.h>
@@ -90,10 +92,12 @@ int main(void)
DEFINE(SIGSEGV, SIGSEGV);
DEFINE(NMI_MASK, NMI_MASK);
#else
- OFFSET(THREAD_INFO, task_struct, stack);
- DEFINE(THREAD_INFO_GAP, _ALIGN_UP(sizeof(struct thread_info), 16));
OFFSET(KSP_LIMIT, thread_struct, ksp_limit);
#endif /* CONFIG_PPC64 */
+ OFFSET(TASK_STACK, task_struct, stack);
+#ifdef CONFIG_SMP
+ OFFSET(TASK_CPU, task_struct, cpu);
+#endif
#ifdef CONFIG_LIVEPATCH
OFFSET(TI_livepatch_sp, thread_info, livepatch_sp);
@@ -161,8 +165,6 @@ int main(void)
OFFSET(TI_FLAGS, thread_info, flags);
OFFSET(TI_LOCAL_FLAGS, thread_info, local_flags);
OFFSET(TI_PREEMPT, thread_info, preempt_count);
- OFFSET(TI_TASK, thread_info, task);
- OFFSET(TI_CPU, thread_info, cpu);
#ifdef CONFIG_PPC64
OFFSET(DCACHEL1BLOCKSIZE, ppc64_caches, l1d.block_size);
@@ -177,6 +179,8 @@ int main(void)
OFFSET(PACAPROCSTART, paca_struct, cpu_start);
OFFSET(PACAKSAVE, paca_struct, kstack);
OFFSET(PACACURRENT, paca_struct, __current);
+ DEFINE(PACA_CURRENT_TI, offsetof(struct paca_struct, __current) +
+ offsetof(struct task_struct, thread_info));
OFFSET(PACASAVEDMSR, paca_struct, saved_msr);
OFFSET(PACAR1, paca_struct, saved_r1);
OFFSET(PACATOC, paca_struct, kernel_toc);
diff --git a/arch/powerpc/kernel/entry_32.S b/arch/powerpc/kernel/entry_32.S
index 0768dfd8a64e..a5e2d5585dcb 100644
--- a/arch/powerpc/kernel/entry_32.S
+++ b/arch/powerpc/kernel/entry_32.S
@@ -97,14 +97,11 @@ crit_transfer_to_handler:
mfspr r0,SPRN_SRR1
stw r0,_SRR1(r11)
- /* set the stack limit to the current stack
- * and set the limit to protect the thread_info
- * struct
- */
+ /* set the stack limit to the current stack */
mfspr r8,SPRN_SPRG_THREAD
lwz r0,KSP_LIMIT(r8)
stw r0,SAVED_KSP_LIMIT(r11)
- rlwimi r0,r1,0,0,(31-THREAD_SHIFT)
+ rlwinm r0,r1,0,0,(31 - THREAD_SHIFT)
stw r0,KSP_LIMIT(r8)
/* fall through */
#endif
@@ -121,14 +118,11 @@ crit_transfer_to_handler:
mfspr r0,SPRN_SRR1
stw r0,crit_srr1@l(0)
- /* set the stack limit to the current stack
- * and set the limit to protect the thread_info
- * struct
- */
+ /* set the stack limit to the current stack */
mfspr r8,SPRN_SPRG_THREAD
lwz r0,KSP_LIMIT(r8)
stw r0,saved_ksp_limit@l(0)
- rlwimi r0,r1,0,0,(31-THREAD_SHIFT)
+ rlwinm r0,r1,0,0,(31 - THREAD_SHIFT)
stw r0,KSP_LIMIT(r8)
/* fall through */
#endif
@@ -157,7 +151,6 @@ transfer_to_handler:
stw r2,_XER(r11)
mfspr r12,SPRN_SPRG_THREAD
addi r2,r12,-THREAD
- tovirt(r2,r2) /* set r2 to current */
beq 2f /* if from user, fix up THREAD.regs */
addi r11,r1,STACK_FRAME_OVERHEAD
stw r11,PT_REGS(r12)
@@ -166,6 +159,9 @@ transfer_to_handler:
internal debug mode bit to do this. */
lwz r12,THREAD_DBCR0(r12)
andis. r12,r12,DBCR0_IDM@h
+#endif
+ ACCOUNT_CPU_USER_ENTRY(r2, r11, r12)
+#if defined(CONFIG_40x) || defined(CONFIG_BOOKE)
beq+ 3f
/* From user and task is ptraced - load up global dbcr0 */
li r12,-1 /* clear all pending debug events */
@@ -174,8 +170,7 @@ transfer_to_handler:
tophys(r11,r11)
addi r11,r11,global_dbcr0@l
#ifdef CONFIG_SMP
- CURRENT_THREAD_INFO(r9, r1)
- lwz r9,TI_CPU(r9)
+ lwz r9,TASK_CPU(r2)
slwi r9,r9,3
add r11,r11,r9
#endif
@@ -185,11 +180,6 @@ transfer_to_handler:
addi r12,r12,-1
stw r12,4(r11)
#endif
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
- CURRENT_THREAD_INFO(r9, r1)
- tophys(r9, r9)
- ACCOUNT_CPU_USER_ENTRY(r9, r11, r12)
-#endif
b 3f
@@ -201,9 +191,7 @@ transfer_to_handler:
ble- stack_ovf /* then the kernel stack overflowed */
5:
#if defined(CONFIG_PPC_BOOK3S_32) || defined(CONFIG_E500)
- CURRENT_THREAD_INFO(r9, r1)
- tophys(r9,r9) /* check local flags */
- lwz r12,TI_LOCAL_FLAGS(r9)
+ lwz r12,TI_LOCAL_FLAGS(r2)
mtcrf 0x01,r12
bt- 31-TLF_NAPPING,4f
bt- 31-TLF_SLEEPING,7f
@@ -212,6 +200,7 @@ transfer_to_handler:
transfer_to_handler_cont:
3:
mflr r9
+ tovirt(r2, r2) /* set r2 to current */
lwz r11,0(r9) /* virtual address of handler */
lwz r9,4(r9) /* where to go when done */
#if defined(CONFIG_PPC_8xx) && defined(CONFIG_PERF_EVENTS)
@@ -275,11 +264,11 @@ reenable_mmu: /* re-enable mmu so we can */
#if defined (CONFIG_PPC_BOOK3S_32) || defined(CONFIG_E500)
4: rlwinm r12,r12,0,~_TLF_NAPPING
- stw r12,TI_LOCAL_FLAGS(r9)
+ stw r12,TI_LOCAL_FLAGS(r2)
b power_save_ppc32_restore
7: rlwinm r12,r12,0,~_TLF_SLEEPING
- stw r12,TI_LOCAL_FLAGS(r9)
+ stw r12,TI_LOCAL_FLAGS(r2)
lwz r9,_MSR(r11) /* if sleeping, clear MSR.EE */
rlwinm r9,r9,0,~MSR_EE
lwz r12,_LINK(r11) /* and return to address in LR */
@@ -351,8 +340,7 @@ _GLOBAL(DoSyscall)
mtmsr r11
1:
#endif /* CONFIG_TRACE_IRQFLAGS */
- CURRENT_THREAD_INFO(r10, r1)
- lwz r11,TI_FLAGS(r10)
+ lwz r11,TI_FLAGS(r2)
andi. r11,r11,_TIF_SYSCALL_DOTRACE
bne- syscall_dotrace
syscall_dotrace_cont:
@@ -385,13 +373,12 @@ ret_from_syscall:
lwz r3,GPR3(r1)
#endif
mr r6,r3
- CURRENT_THREAD_INFO(r12, r1)
/* disable interrupts so current_thread_info()->flags can't change */
LOAD_MSR_KERNEL(r10,MSR_KERNEL) /* doesn't include MSR_EE */
/* Note: We don't bother telling lockdep about it */
SYNC
MTMSRD(r10)
- lwz r9,TI_FLAGS(r12)
+ lwz r9,TI_FLAGS(r2)
li r8,-MAX_ERRNO
andi. r0,r9,(_TIF_SYSCALL_DOTRACE|_TIF_SINGLESTEP|_TIF_USER_WORK_MASK|_TIF_PERSYSCALL_MASK)
bne- syscall_exit_work
@@ -438,8 +425,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_NEED_PAIRED_STWCX)
#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
andi. r4,r8,MSR_PR
beq 3f
- CURRENT_THREAD_INFO(r4, r1)
- ACCOUNT_CPU_USER_EXIT(r4, r5, r7)
+ ACCOUNT_CPU_USER_EXIT(r2, r5, r7)
3:
#endif
lwz r4,_LINK(r1)
@@ -532,7 +518,7 @@ syscall_exit_work:
/* Clear per-syscall TIF flags if any are set. */
li r11,_TIF_PERSYSCALL_MASK
- addi r12,r12,TI_FLAGS
+ addi r12,r2,TI_FLAGS
3: lwarx r8,0,r12
andc r8,r8,r11
#ifdef CONFIG_IBM405_ERR77
@@ -540,7 +526,6 @@ syscall_exit_work:
#endif
stwcx. r8,0,r12
bne- 3b
- subi r12,r12,TI_FLAGS
4: /* Anything which requires enabling interrupts? */
andi. r0,r9,(_TIF_SYSCALL_DOTRACE|_TIF_SINGLESTEP)
@@ -819,8 +804,7 @@ ret_from_except:
user_exc_return: /* r10 contains MSR_KERNEL here */
/* Check current_thread_info()->flags */
- CURRENT_THREAD_INFO(r9, r1)
- lwz r9,TI_FLAGS(r9)
+ lwz r9,TI_FLAGS(r2)
andi. r0,r9,_TIF_USER_WORK_MASK
bne do_work
@@ -832,18 +816,14 @@ restore_user:
andis. r10,r0,DBCR0_IDM@h
bnel- load_dbcr0
#endif
-#ifdef CONFIG_VIRT_CPU_ACCOUNTING_NATIVE
- CURRENT_THREAD_INFO(r9, r1)
- ACCOUNT_CPU_USER_EXIT(r9, r10, r11)
-#endif
+ ACCOUNT_CPU_USER_EXIT(r2, r10, r11)
b restore
/* N.B. the only way to get here is from the beq following ret_from_except. */
resume_kernel:
/* check current_thread_info, _TIF_EMULATE_STACK_STORE */
- CURRENT_THREAD_INFO(r9, r1)
- lwz r8,TI_FLAGS(r9)
+ lwz r8,TI_FLAGS(r2)
andis. r0,r8,_TIF_EMULATE_STACK_STORE@h
beq+ 1f
@@ -869,7 +849,7 @@ resume_kernel:
/* Clear _TIF_EMULATE_STACK_STORE flag */
lis r11,_TIF_EMULATE_STACK_STORE@h
- addi r5,r9,TI_FLAGS
+ addi r5,r2,TI_FLAGS
0: lwarx r8,0,r5
andc r8,r8,r11
#ifdef CONFIG_IBM405_ERR77
@@ -881,7 +861,7 @@ resume_kernel:
#ifdef CONFIG_PREEMPT
/* check current_thread_info->preempt_count */
- lwz r0,TI_PREEMPT(r9)
+ lwz r0,TI_PREEMPT(r2)
cmpwi 0,r0,0 /* if non-zero, just restore regs and return */
bne restore
andi. r8,r8,_TIF_NEED_RESCHED
@@ -897,8 +877,7 @@ resume_kernel:
bl trace_hardirqs_off
#endif
1: bl preempt_schedule_irq
- CURRENT_THREAD_INFO(r9, r1)
- lwz r3,TI_FLAGS(r9)
+ lwz r3,TI_FLAGS(r2)
andi. r0,r3,_TIF_NEED_RESCHED
bne- 1b
#ifdef CONFIG_TRACE_IRQFLAGS
@@ -1166,10 +1145,6 @@ ret_from_debug_exc:
mfspr r9,SPRN_SPRG_THREAD
lwz r10,SAVED_KSP_LIMIT(r1)
stw r10,KSP_LIMIT(r9)
- lwz r9,THREAD_INFO-THREAD(r9)
- CURRENT_THREAD_INFO(r10, r1)
- lwz r10,TI_PREEMPT(r10)
- stw r10,TI_PREEMPT(r9)
RESTORE_xSRR(SRR0,SRR1);
RESTORE_xSRR(CSRR0,CSRR1);
RESTORE_MMU_REGS;
@@ -1201,8 +1176,7 @@ load_dbcr0:
lis r11,global_dbcr0@ha
addi r11,r11,global_dbcr0@l
#ifdef CONFIG_SMP
- CURRENT_THREAD_INFO(r9, r1)
- lwz r9,TI_CPU(r9)
+ lwz r9,TASK_CPU(r2)
slwi r9,r9,3
add r11,r11,r9
#endif
@@ -1242,8 +1216,7 @@ recheck:
LOAD_MSR_KERNEL(r10,MSR_KERNEL)
SYNC
MTMSRD(r10) /* disable interrupts */
- CURRENT_THREAD_INFO(r9, r1)
- lwz r9,TI_FLAGS(r9)
+ lwz r9,TI_FLAGS(r2)
andi. r0,r9,_TIF_NEED_RESCHED
bne- do_resched
andi. r0,r9,_TIF_USER_WORK_MASK
@@ -1292,10 +1265,13 @@ BEGIN_FTR_SECTION
END_FTR_SECTION_IFSET(CPU_FTR_601)
lwz r3,_TRAP(r1)
andi. r0,r3,1
- beq 4f
+ beq 5f
SAVE_NVGPRS(r1)
rlwinm r3,r3,0,0,30
stw r3,_TRAP(r1)
+5: mfspr r2,SPRN_SPRG_THREAD
+ addi r2,r2,-THREAD
+ tovirt(r2,r2) /* set back r2 to current */
4: addi r3,r1,STACK_FRAME_OVERHEAD
bl unrecoverable_exception
/* shouldn't return */
diff --git a/arch/powerpc/kernel/entry_64.S b/arch/powerpc/kernel/entry_64.S
index a2c168b395d2..56e95ed9b0ab 100644
--- a/arch/powerpc/kernel/entry_64.S
+++ b/arch/powerpc/kernel/entry_64.S
@@ -166,7 +166,7 @@ system_call: /* label this so stack traces look sane */
li r10,IRQS_ENABLED
std r10,SOFTE(r1)
- CURRENT_THREAD_INFO(r11, r1)
+ ld r11, PACA_CURRENT_TI(r13)
ld r10,TI_FLAGS(r11)
andi. r11,r10,_TIF_SYSCALL_DOTRACE
bne .Lsyscall_dotrace /* does not return */
@@ -213,7 +213,7 @@ system_call: /* label this so stack traces look sane */
ld r3,RESULT(r1)
#endif
- CURRENT_THREAD_INFO(r12, r1)
+ ld r12, PACA_CURRENT_TI(r13)
ld r8,_MSR(r1)
#ifdef CONFIG_PPC_BOOK3S
@@ -348,7 +348,7 @@ END_FTR_SECTION_IFSET(CPU_FTR_HAS_PPR)
/* Repopulate r9 and r10 for the syscall path */
addi r9,r1,STACK_FRAME_OVERHEAD
- CURRENT_THREAD_INFO(r10, r1)
+ ld r10, PACA_CURRENT_TI(r13)
ld r10,TI_FLAGS(r10)
cmpldi r0,NR_syscalls
@@ -695,7 +695,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_ARCH_207S)
2:
#endif /* CONFIG_PPC_BOOK3S_64 */
- CURRENT_THREAD_INFO(r7, r8) /* base of new stack */
+ clrrdi r7, r8, THREAD_SHIFT /* base of new stack */
/* Note: this uses SWITCH_FRAME_SIZE rather than INT_FRAME_SIZE
because we don't need to leave the 288-byte ABI gap at the
top of the kernel stack. */
@@ -746,7 +746,7 @@ _GLOBAL(ret_from_except_lite)
mtmsrd r10,1 /* Update machine state */
#endif /* CONFIG_PPC_BOOK3E */
- CURRENT_THREAD_INFO(r9, r1)
+ ld r9, PACA_CURRENT_TI(r13)
ld r3,_MSR(r1)
#ifdef CONFIG_PPC_BOOK3E
ld r10,PACACURRENT(r13)
@@ -860,7 +860,7 @@ resume_kernel:
1: bl preempt_schedule_irq
/* Re-test flags and eventually loop */
- CURRENT_THREAD_INFO(r9, r1)
+ ld r9, PACA_CURRENT_TI(r13)
ld r4,TI_FLAGS(r9)
andi. r0,r4,_TIF_NEED_RESCHED
bne 1b
diff --git a/arch/powerpc/kernel/epapr_hcalls.S b/arch/powerpc/kernel/epapr_hcalls.S
index 52ca2471ee1a..d252f4663a23 100644
--- a/arch/powerpc/kernel/epapr_hcalls.S
+++ b/arch/powerpc/kernel/epapr_hcalls.S
@@ -21,10 +21,9 @@
#ifndef CONFIG_PPC64
/* epapr_ev_idle() was derived from e500_idle() */
_GLOBAL(epapr_ev_idle)
- CURRENT_THREAD_INFO(r3, r1)
- PPC_LL r4, TI_LOCAL_FLAGS(r3) /* set napping bit */
+ PPC_LL r4, TI_LOCAL_FLAGS(r2) /* set napping bit */
ori r4, r4,_TLF_NAPPING /* so when we take an exception */
- PPC_STL r4, TI_LOCAL_FLAGS(r3) /* it will return to our caller */
+ PPC_STL r4, TI_LOCAL_FLAGS(r2) /* it will return to our caller */
wrteei 1
diff --git a/arch/powerpc/kernel/exceptions-64e.S b/arch/powerpc/kernel/exceptions-64e.S
index afb638778f44..92d5ded2b290 100644
--- a/arch/powerpc/kernel/exceptions-64e.S
+++ b/arch/powerpc/kernel/exceptions-64e.S
@@ -77,17 +77,6 @@ special_reg_save:
andi. r3,r3,MSR_PR
bnelr
- /* Copy info into temporary exception thread info */
- ld r11,PACAKSAVE(r13)
- CURRENT_THREAD_INFO(r11, r11)
- CURRENT_THREAD_INFO(r12, r1)
- ld r10,TI_FLAGS(r11)
- std r10,TI_FLAGS(r12)
- ld r10,TI_PREEMPT(r11)
- std r10,TI_PREEMPT(r12)
- ld r10,TI_TASK(r11)
- std r10,TI_TASK(r12)
-
/*
* Advance to the next TLB exception frame for handler
* types that don't do it automatically.
@@ -504,7 +493,7 @@ exc_##n##_bad_stack: \
* interrupts happen before the wait instruction.
*/
#define CHECK_NAPPING() \
- CURRENT_THREAD_INFO(r11, r1); \
+ ld r11, PACA_CURRENT_TI(r13); \
ld r10,TI_LOCAL_FLAGS(r11); \
andi. r9,r10,_TLF_NAPPING; \
beq+ 1f; \
diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S
index 9e253ce27e08..83be18d478b8 100644
--- a/arch/powerpc/kernel/exceptions-64s.S
+++ b/arch/powerpc/kernel/exceptions-64s.S
@@ -1629,7 +1629,7 @@ do_hash_page:
ori r0,r0,DSISR_BAD_FAULT_64S@l
and. r0,r4,r0 /* weird error? */
bne- handle_page_fault /* if not, try to insert a HPTE */
- CURRENT_THREAD_INFO(r11, r1)
+ ld r11, PACA_CURRENT_TI(r13)
lwz r0,TI_PREEMPT(r11) /* If we're in an "NMI" */
andis. r0,r0,NMI_MASK@h /* (i.e. an irq when soft-disabled) */
bne 77f /* then don't call hash_page now */
diff --git a/arch/powerpc/kernel/head_32.S b/arch/powerpc/kernel/head_32.S
index 05b08db3901d..146385b1c2da 100644
--- a/arch/powerpc/kernel/head_32.S
+++ b/arch/powerpc/kernel/head_32.S
@@ -261,7 +261,7 @@ __secondary_hold_acknowledge:
tophys(r11,r1); /* use tophys(r1) if kernel */ \
beq 1f; \
mfspr r11,SPRN_SPRG_THREAD; \
- lwz r11,THREAD_INFO-THREAD(r11); \
+ lwz r11,TASK_STACK-THREAD(r11); \
addi r11,r11,THREAD_SIZE; \
tophys(r11,r11); \
1: subi r11,r11,INT_FRAME_SIZE /* alloc exc. frame */
@@ -845,12 +845,12 @@ __secondary_start:
bl init_idle_6xx
#endif /* CONFIG_PPC_BOOK3S_32 */
- /* get current_thread_info and current */
- lis r1,secondary_ti@ha
- tophys(r1,r1)
- lwz r1,secondary_ti@l(r1)
- tophys(r2,r1)
- lwz r2,TI_TASK(r2)
+ /* get current's stack and current */
+ lis r2,secondary_current@ha
+ tophys(r2,r2)
+ lwz r2,secondary_current@l(r2)
+ tophys(r1,r2)
+ lwz r1,TASK_STACK(r1)
/* stack */
addi r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD
diff --git a/arch/powerpc/kernel/head_40x.S b/arch/powerpc/kernel/head_40x.S
index b19d78410511..3088c9f29f5e 100644
--- a/arch/powerpc/kernel/head_40x.S
+++ b/arch/powerpc/kernel/head_40x.S
@@ -115,7 +115,7 @@ _ENTRY(saved_ksp_limit)
andi. r11,r11,MSR_PR; \
beq 1f; \
mfspr r1,SPRN_SPRG_THREAD; /* if from user, start at top of */\
- lwz r1,THREAD_INFO-THREAD(r1); /* this thread's kernel stack */\
+ lwz r1,TASK_STACK-THREAD(r1); /* this thread's kernel stack */\
addi r1,r1,THREAD_SIZE; \
1: subi r1,r1,INT_FRAME_SIZE; /* Allocate an exception frame */\
tophys(r11,r1); \
@@ -158,7 +158,7 @@ _ENTRY(saved_ksp_limit)
beq 1f; \
/* COMING FROM USER MODE */ \
mfspr r11,SPRN_SPRG_THREAD; /* if from user, start at top of */\
- lwz r11,THREAD_INFO-THREAD(r11); /* this thread's kernel stack */\
+ lwz r11,TASK_STACK-THREAD(r11); /* this thread's kernel stack */\
1: addi r11,r11,THREAD_SIZE-INT_FRAME_SIZE; /* Alloc an excpt frm */\
tophys(r11,r11); \
stw r10,_CCR(r11); /* save various registers */\
diff --git a/arch/powerpc/kernel/head_44x.S b/arch/powerpc/kernel/head_44x.S
index bf23c19c92d6..37117ab11584 100644
--- a/arch/powerpc/kernel/head_44x.S
+++ b/arch/powerpc/kernel/head_44x.S
@@ -1019,10 +1019,10 @@ _GLOBAL(start_secondary_47x)
/* Now we can get our task struct and real stack pointer */
- /* Get current_thread_info and current */
- lis r1,secondary_ti@ha
- lwz r1,secondary_ti@l(r1)
- lwz r2,TI_TASK(r1)
+ /* Get current's stack and current */
+ lis r2,secondary_current@ha
+ lwz r2,secondary_current@l(r2)
+ lwz r1,TASK_STACK(r2)
/* Current stack pointer */
addi r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD
diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 4898e9491a1c..c6a9bf7b34bf 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -805,6 +805,7 @@ __secondary_start:
LOAD_REG_ADDR(r3, current_set)
sldi r28,r24,3 /* get current_set[cpu#] */
ldx r14,r3,r28
+ ld r14,TASK_STACK(r14)
addi r14,r14,THREAD_SIZE-STACK_FRAME_OVERHEAD
std r14,PACAKSAVE(r13)
diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index 20cc816b3508..ca9207013579 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -142,7 +142,7 @@ instruction_counter:
tophys(r11,r1); /* use tophys(r1) if kernel */ \
beq 1f; \
mfspr r11,SPRN_SPRG_THREAD; \
- lwz r11,THREAD_INFO-THREAD(r11); \
+ lwz r11,TASK_STACK-THREAD(r11); \
addi r11,r11,THREAD_SIZE; \
tophys(r11,r11); \
1: subi r11,r11,INT_FRAME_SIZE /* alloc exc. frame */
diff --git a/arch/powerpc/kernel/head_booke.h b/arch/powerpc/kernel/head_booke.h
index 306e26c073a0..1b22a8dea399 100644
--- a/arch/powerpc/kernel/head_booke.h
+++ b/arch/powerpc/kernel/head_booke.h
@@ -55,7 +55,7 @@ END_BTB_FLUSH_SECTION
beq 1f; \
BOOKE_CLEAR_BTB(r11) \
/* if from user, start at top of this thread's kernel stack */ \
- lwz r11, THREAD_INFO-THREAD(r10); \
+ lwz r11, TASK_STACK - THREAD(r10); \
ALLOC_STACK_FRAME(r11, THREAD_SIZE); \
1 : subi r11, r11, INT_FRAME_SIZE; /* Allocate exception frame */ \
stw r13, _CCR(r11); /* save various registers */ \
@@ -142,7 +142,7 @@ END_BTB_FLUSH_SECTION
BOOKE_CLEAR_BTB(r10) \
andi. r11,r11,MSR_PR; \
mfspr r11,SPRN_SPRG_THREAD; /* if from user, start at top of */\
- lwz r11,THREAD_INFO-THREAD(r11); /* this thread's kernel stack */\
+ lwz r11, TASK_STACK - THREAD(r11); /* this thread's kernel stack */\
addi r11,r11,EXC_LVL_FRAME_OVERHEAD; /* allocate stack frame */\
beq 1f; \
/* COMING FROM USER MODE */ \
@@ -155,13 +155,7 @@ END_BTB_FLUSH_SECTION
stw r10,GPR11(r11); \
b 2f; \
/* COMING FROM PRIV MODE */ \
-1: lwz r9,TI_FLAGS-EXC_LVL_FRAME_OVERHEAD(r11); \
- lwz r10,TI_PREEMPT-EXC_LVL_FRAME_OVERHEAD(r11); \
- stw r9,TI_FLAGS-EXC_LVL_FRAME_OVERHEAD(r8); \
- stw r10,TI_PREEMPT-EXC_LVL_FRAME_OVERHEAD(r8); \
- lwz r9,TI_TASK-EXC_LVL_FRAME_OVERHEAD(r11); \
- stw r9,TI_TASK-EXC_LVL_FRAME_OVERHEAD(r8); \
- mr r11,r8; \
+1: mr r11, r8; \
2: mfspr r8,SPRN_SPRG_RSCRATCH_##exc_level; \
stw r12,GPR12(r11); /* save various registers */\
mflr r10; \
diff --git a/arch/powerpc/kernel/head_fsl_booke.S b/arch/powerpc/kernel/head_fsl_booke.S
index 2386ce2a9c6e..1881127682e9 100644
--- a/arch/powerpc/kernel/head_fsl_booke.S
+++ b/arch/powerpc/kernel/head_fsl_booke.S
@@ -243,8 +243,9 @@ set_ivor:
li r0,0
stwu r0,THREAD_SIZE-STACK_FRAME_OVERHEAD(r1)
- CURRENT_THREAD_INFO(r22, r1)
- stw r24, TI_CPU(r22)
+#ifdef CONFIG_SMP
+ stw r24, TASK_CPU(r2)
+#endif
bl early_init
@@ -717,8 +718,7 @@ finish_tlb_load:
/* Get the next_tlbcam_idx percpu var */
#ifdef CONFIG_SMP
- lwz r12, THREAD_INFO-THREAD(r12)
- lwz r15, TI_CPU(r12)
+ lwz r15, TASK_CPU-THREAD(r12)
lis r14, __per_cpu_offset@h
ori r14, r14, __per_cpu_offset@l
rlwinm r15, r15, 2, 0, 29
@@ -1089,10 +1089,10 @@ __secondary_start:
mr r4,r24 /* Why? */
bl call_setup_cpu
- /* get current_thread_info and current */
- lis r1,secondary_ti@ha
- lwz r1,secondary_ti@l(r1)
- lwz r2,TI_TASK(r1)
+ /* get current's stack and current */
+ lis r2,secondary_current@ha
+ lwz r2,secondary_current@l(r2)
+ lwz r1,TASK_STACK(r2)
/* stack */
addi r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD
diff --git a/arch/powerpc/kernel/idle_6xx.S b/arch/powerpc/kernel/idle_6xx.S
index ff026c9d3cab..5afd2e236990 100644
--- a/arch/powerpc/kernel/idle_6xx.S
+++ b/arch/powerpc/kernel/idle_6xx.S
@@ -136,10 +136,9 @@ BEGIN_FTR_SECTION
DSSALL
sync
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
- CURRENT_THREAD_INFO(r9, r1)
- lwz r8,TI_LOCAL_FLAGS(r9) /* set napping bit */
+ lwz r8,TI_LOCAL_FLAGS(r2) /* set napping bit */
ori r8,r8,_TLF_NAPPING /* so when we take an exception */
- stw r8,TI_LOCAL_FLAGS(r9) /* it will return to our caller */
+ stw r8,TI_LOCAL_FLAGS(r2) /* it will return to our caller */
mfmsr r7
ori r7,r7,MSR_EE
oris r7,r7,MSR_POW@h
@@ -159,8 +158,7 @@ _GLOBAL(power_save_ppc32_restore)
stw r9,_NIP(r11) /* make it do a blr */
#ifdef CONFIG_SMP
- CURRENT_THREAD_INFO(r12, r11)
- lwz r11,TI_CPU(r12) /* get cpu number * 4 */
+ lwz r11,TASK_CPU(r2) /* get cpu number * 4 */
slwi r11,r11,2
#else
li r11,0
diff --git a/arch/powerpc/kernel/idle_book3e.S b/arch/powerpc/kernel/idle_book3e.S
index 4e0d94d02030..31e732c378ad 100644
--- a/arch/powerpc/kernel/idle_book3e.S
+++ b/arch/powerpc/kernel/idle_book3e.S
@@ -63,7 +63,7 @@ _GLOBAL(\name)
1: /* Let's set the _TLF_NAPPING flag so interrupts make us return
* to the right spot
*/
- CURRENT_THREAD_INFO(r11, r1)
+ ld r11, PACACURRENT(r13)
ld r10,TI_LOCAL_FLAGS(r11)
ori r10,r10,_TLF_NAPPING
std r10,TI_LOCAL_FLAGS(r11)
diff --git a/arch/powerpc/kernel/idle_e500.S b/arch/powerpc/kernel/idle_e500.S
index 583e55ac7d26..69dfcd2ca011 100644
--- a/arch/powerpc/kernel/idle_e500.S
+++ b/arch/powerpc/kernel/idle_e500.S
@@ -22,10 +22,9 @@
.text
_GLOBAL(e500_idle)
- CURRENT_THREAD_INFO(r3, r1)
- lwz r4,TI_LOCAL_FLAGS(r3) /* set napping bit */
+ lwz r4,TI_LOCAL_FLAGS(r2) /* set napping bit */
ori r4,r4,_TLF_NAPPING /* so when we take an exception */
- stw r4,TI_LOCAL_FLAGS(r3) /* it will return to our caller */
+ stw r4,TI_LOCAL_FLAGS(r2) /* it will return to our caller */
#ifdef CONFIG_PPC_E500MC
wrteei 1
@@ -88,8 +87,7 @@ _GLOBAL(power_save_ppc32_restore)
stw r9,_NIP(r11) /* make it do a blr */
#ifdef CONFIG_SMP
- CURRENT_THREAD_INFO(r12, r1)
- lwz r11,TI_CPU(r12) /* get cpu number * 4 */
+ lwz r11,TASK_CPU(r2) /* get cpu number * 4 */
slwi r11,r11,2
#else
li r11,0
diff --git a/arch/powerpc/kernel/idle_power4.S b/arch/powerpc/kernel/idle_power4.S
index a09b3c7ca176..b4c849f9f0e2 100644
--- a/arch/powerpc/kernel/idle_power4.S
+++ b/arch/powerpc/kernel/idle_power4.S
@@ -68,7 +68,7 @@ BEGIN_FTR_SECTION
DSSALL
sync
END_FTR_SECTION_IFSET(CPU_FTR_ALTIVEC)
- CURRENT_THREAD_INFO(r9, r1)
+ ld r9, PACA_CURRENT_TI(r13)
ld r8,TI_LOCAL_FLAGS(r9) /* set napping bit */
ori r8,r8,_TLF_NAPPING /* so when we take an exception */
std r8,TI_LOCAL_FLAGS(r9) /* it will return to our caller */
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index bb299613a462..8a936723c791 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -618,9 +618,8 @@ static inline void check_stack_overflow(void)
sp = current_stack_pointer() & (THREAD_SIZE-1);
/* check for stack overflow: is there less than 2KB free? */
- if (unlikely(sp < (sizeof(struct thread_info) + 2048))) {
- pr_err("do_IRQ: stack overflow: %ld\n",
- sp - sizeof(struct thread_info));
+ if (unlikely(sp < 2048)) {
+ pr_err("do_IRQ: stack overflow: %ld\n", sp);
dump_stack();
}
#endif
@@ -660,36 +659,21 @@ void __do_irq(struct pt_regs *regs)
void do_IRQ(struct pt_regs *regs)
{
struct pt_regs *old_regs = set_irq_regs(regs);
- struct thread_info *curtp, *irqtp, *sirqtp;
+ void *cursp, *irqsp, *sirqsp;
/* Switch to the irq stack to handle this */
- curtp = current_thread_info();
- irqtp = hardirq_ctx[raw_smp_processor_id()];
- sirqtp = softirq_ctx[raw_smp_processor_id()];
+ cursp = (void *)(current_stack_pointer() & ~(THREAD_SIZE - 1));
+ irqsp = hardirq_ctx[raw_smp_processor_id()];
+ sirqsp = softirq_ctx[raw_smp_processor_id()];
/* Already there ? */
- if (unlikely(curtp == irqtp || curtp == sirqtp)) {
+ if (unlikely(cursp == irqsp || cursp == sirqsp)) {
__do_irq(regs);
set_irq_regs(old_regs);
return;
}
-
- /* Prepare the thread_info in the irq stack */
- irqtp->task = curtp->task;
- irqtp->flags = 0;
-
- /* Copy the preempt_count so that the [soft]irq checks work. */
- irqtp->preempt_count = curtp->preempt_count;
-
/* Switch stack and call */
- call_do_irq(regs, irqtp);
-
- /* Restore stack limit */
- irqtp->task = NULL;
-
- /* Copy back updates to the thread_info */
- if (irqtp->flags)
- set_bits(irqtp->flags, &curtp->flags);
+ call_do_irq(regs, irqsp);
set_irq_regs(old_regs);
}
@@ -698,90 +682,20 @@ void __init init_IRQ(void)
{
if (ppc_md.init_IRQ)
ppc_md.init_IRQ();
-
- exc_lvl_ctx_init();
-
- irq_ctx_init();
}
#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
-struct thread_info *critirq_ctx[NR_CPUS] __read_mostly;
-struct thread_info *dbgirq_ctx[NR_CPUS] __read_mostly;
-struct thread_info *mcheckirq_ctx[NR_CPUS] __read_mostly;
-
-void exc_lvl_ctx_init(void)
-{
- struct thread_info *tp;
- int i, cpu_nr;
-
- for_each_possible_cpu(i) {
-#ifdef CONFIG_PPC64
- cpu_nr = i;
-#else
-#ifdef CONFIG_SMP
- cpu_nr = get_hard_smp_processor_id(i);
-#else
- cpu_nr = 0;
-#endif
+void *critirq_ctx[NR_CPUS] __read_mostly;
+void *dbgirq_ctx[NR_CPUS] __read_mostly;
+void *mcheckirq_ctx[NR_CPUS] __read_mostly;
#endif
- memset((void *)critirq_ctx[cpu_nr], 0, THREAD_SIZE);
- tp = critirq_ctx[cpu_nr];
- tp->cpu = cpu_nr;
- tp->preempt_count = 0;
-
-#ifdef CONFIG_BOOKE
- memset((void *)dbgirq_ctx[cpu_nr], 0, THREAD_SIZE);
- tp = dbgirq_ctx[cpu_nr];
- tp->cpu = cpu_nr;
- tp->preempt_count = 0;
-
- memset((void *)mcheckirq_ctx[cpu_nr], 0, THREAD_SIZE);
- tp = mcheckirq_ctx[cpu_nr];
- tp->cpu = cpu_nr;
- tp->preempt_count = HARDIRQ_OFFSET;
-#endif
- }
-}
-#endif
-
-struct thread_info *softirq_ctx[NR_CPUS] __read_mostly;
-struct thread_info *hardirq_ctx[NR_CPUS] __read_mostly;
-
-void irq_ctx_init(void)
-{
- struct thread_info *tp;
- int i;
-
- for_each_possible_cpu(i) {
- memset((void *)softirq_ctx[i], 0, THREAD_SIZE);
- tp = softirq_ctx[i];
- tp->cpu = i;
- klp_init_thread_info(tp);
-
- memset((void *)hardirq_ctx[i], 0, THREAD_SIZE);
- tp = hardirq_ctx[i];
- tp->cpu = i;
- klp_init_thread_info(tp);
- }
-}
+void *softirq_ctx[NR_CPUS] __read_mostly;
+void *hardirq_ctx[NR_CPUS] __read_mostly;
void do_softirq_own_stack(void)
{
- struct thread_info *curtp, *irqtp;
-
- curtp = current_thread_info();
- irqtp = softirq_ctx[smp_processor_id()];
- irqtp->task = curtp->task;
- irqtp->flags = 0;
- call_do_softirq(irqtp);
- irqtp->task = NULL;
-
- /* Set any flag that may have been set on the
- * alternate stack
- */
- if (irqtp->flags)
- set_bits(irqtp->flags, &curtp->flags);
+ call_do_softirq(softirq_ctx[smp_processor_id()]);
}
irq_hw_number_t virq_to_hw(unsigned int virq)
diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c
index e1865565f0ae..7dd55eb1259d 100644
--- a/arch/powerpc/kernel/kgdb.c
+++ b/arch/powerpc/kernel/kgdb.c
@@ -151,41 +151,13 @@ static int kgdb_handle_breakpoint(struct pt_regs *regs)
return 1;
}
-static DEFINE_PER_CPU(struct thread_info, kgdb_thread_info);
static int kgdb_singlestep(struct pt_regs *regs)
{
- struct thread_info *thread_info, *exception_thread_info;
- struct thread_info *backup_current_thread_info =
- this_cpu_ptr(&kgdb_thread_info);
-
if (user_mode(regs))
return 0;
- /*
- * On Book E and perhaps other processors, singlestep is handled on
- * the critical exception stack. This causes current_thread_info()
- * to fail, since it it locates the thread_info by masking off
- * the low bits of the current stack pointer. We work around
- * this issue by copying the thread_info from the kernel stack
- * before calling kgdb_handle_exception, and copying it back
- * afterwards. On most processors the copy is avoided since
- * exception_thread_info == thread_info.
- */
- thread_info = (struct thread_info *)(regs->gpr[1] & ~(THREAD_SIZE-1));
- exception_thread_info = current_thread_info();
-
- if (thread_info != exception_thread_info) {
- /* Save the original current_thread_info. */
- memcpy(backup_current_thread_info, exception_thread_info, sizeof *thread_info);
- memcpy(exception_thread_info, thread_info, sizeof *thread_info);
- }
-
kgdb_handle_exception(0, SIGTRAP, 0, regs);
- if (thread_info != exception_thread_info)
- /* Restore current_thread_info lastly. */
- memcpy(exception_thread_info, backup_current_thread_info, sizeof *thread_info);
-
return 1;
}
diff --git a/arch/powerpc/kernel/machine_kexec_64.c b/arch/powerpc/kernel/machine_kexec_64.c
index a0f6f45005bd..75692c327ba0 100644
--- a/arch/powerpc/kernel/machine_kexec_64.c
+++ b/arch/powerpc/kernel/machine_kexec_64.c
@@ -317,10 +317,8 @@ void default_machine_kexec(struct kimage *image)
* We setup preempt_count to avoid using VMX in memcpy.
* XXX: the task struct will likely be invalid once we do the copy!
*/
- kexec_stack.thread_info.task = current_thread_info()->task;
- kexec_stack.thread_info.flags = 0;
- kexec_stack.thread_info.preempt_count = HARDIRQ_OFFSET;
- kexec_stack.thread_info.cpu = current_thread_info()->cpu;
+ current_thread_info()->flags = 0;
+ current_thread_info()->preempt_count = HARDIRQ_OFFSET;
/* We need a static PACA, too; copy this CPU's PACA over and switch to
* it. Also poison per_cpu_offset and NULL lppaca to catch anyone using
diff --git a/arch/powerpc/kernel/misc_32.S b/arch/powerpc/kernel/misc_32.S
index 57d2ffb2d45c..0dda4f8e3d7a 100644
--- a/arch/powerpc/kernel/misc_32.S
+++ b/arch/powerpc/kernel/misc_32.S
@@ -46,11 +46,10 @@ _GLOBAL(call_do_softirq)
mflr r0
stw r0,4(r1)
lwz r10,THREAD+KSP_LIMIT(r2)
- addi r11,r3,THREAD_INFO_GAP
+ stw r3, THREAD+KSP_LIMIT(r2)
stwu r1,THREAD_SIZE-STACK_FRAME_OVERHEAD(r3)
mr r1,r3
stw r10,8(r1)
- stw r11,THREAD+KSP_LIMIT(r2)
bl __do_softirq
lwz r10,8(r1)
lwz r1,0(r1)
@@ -60,17 +59,16 @@ _GLOBAL(call_do_softirq)
blr
/*
- * void call_do_irq(struct pt_regs *regs, struct thread_info *irqtp);
+ * void call_do_irq(struct pt_regs *regs, void *sp);
*/
_GLOBAL(call_do_irq)
mflr r0
stw r0,4(r1)
lwz r10,THREAD+KSP_LIMIT(r2)
- addi r11,r4,THREAD_INFO_GAP
+ stw r4, THREAD+KSP_LIMIT(r2)
stwu r1,THREAD_SIZE-STACK_FRAME_OVERHEAD(r4)
mr r1,r4
stw r10,8(r1)
- stw r11,THREAD+KSP_LIMIT(r2)
bl __do_irq
lwz r10,8(r1)
lwz r1,0(r1)
@@ -183,10 +181,13 @@ _GLOBAL(low_choose_750fx_pll)
or r4,r4,r5
mtspr SPRN_HID1,r4
+#ifdef CONFIG_SMP
/* Store new HID1 image */
- CURRENT_THREAD_INFO(r6, r1)
- lwz r6,TI_CPU(r6)
+ lwz r6,TASK_CPU(r2)
slwi r6,r6,2
+#else
+ li r6, 0
+#endif
addis r6,r6,nap_save_hid1@ha
stw r4,nap_save_hid1@l(r6)
@@ -599,7 +600,7 @@ EXPORT_SYMBOL(__bswapdi2)
#ifdef CONFIG_SMP
_GLOBAL(start_secondary_resume)
/* Reset stack */
- CURRENT_THREAD_INFO(r1, r1)
+ rlwinm r1, r1, 0, 0, 31 - THREAD_SHIFT
addi r1,r1,THREAD_SIZE-STACK_FRAME_OVERHEAD
li r3,0
stw r3,0(r1) /* Zero the stack frame pointer */
diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index ce393df243aa..da82ab5dd743 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1231,8 +1231,8 @@ struct task_struct *__switch_to(struct task_struct *prev,
batch->active = 1;
}
- if (current_thread_info()->task->thread.regs) {
- restore_math(current_thread_info()->task->thread.regs);
+ if (current->thread.regs) {
+ restore_math(current->thread.regs);
/*
* The copy-paste buffer can only store into foreign real
@@ -1242,7 +1242,7 @@ struct task_struct *__switch_to(struct task_struct *prev,
* mappings, we must issue a cp_abort to clear any state and
* prevent snooping, corruption or a covert channel.
*/
- if (current_thread_info()->task->thread.used_vas)
+ if (current->thread.used_vas)
asm volatile(PPC_CP_ABORT);
}
#endif /* CONFIG_PPC_BOOK3S_64 */
@@ -1634,7 +1634,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
unsigned long sp = (unsigned long)task_stack_page(p) + THREAD_SIZE;
struct thread_info *ti = task_thread_info(p);
- klp_init_thread_info(ti);
+ klp_init_thread_info(p);
/* Copy registers */
sp -= sizeof(struct pt_regs);
@@ -1691,8 +1691,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp,
sp -= STACK_FRAME_OVERHEAD;
p->thread.ksp = sp;
#ifdef CONFIG_PPC32
- p->thread.ksp_limit = (unsigned long)task_stack_page(p) +
- _ALIGN_UP(sizeof(struct thread_info), 16);
+ p->thread.ksp_limit = (unsigned long)end_of_stack(p);
#endif
#ifdef CONFIG_HAVE_HW_BREAKPOINT
p->thread.ptrace_bps[0] = NULL;
@@ -1995,21 +1994,14 @@ static inline int valid_irq_stack(unsigned long sp, struct task_struct *p,
unsigned long stack_page;
unsigned long cpu = task_cpu(p);
- /*
- * Avoid crashing if the stack has overflowed and corrupted
- * task_cpu(p), which is in the thread_info struct.
- */
- if (cpu < NR_CPUS && cpu_possible(cpu)) {
- stack_page = (unsigned long) hardirq_ctx[cpu];
- if (sp >= stack_page + sizeof(struct thread_struct)
- && sp <= stack_page + THREAD_SIZE - nbytes)
- return 1;
-
- stack_page = (unsigned long) softirq_ctx[cpu];
- if (sp >= stack_page + sizeof(struct thread_struct)
- && sp <= stack_page + THREAD_SIZE - nbytes)
- return 1;
- }
+ stack_page = (unsigned long)hardirq_ctx[cpu];
+ if (sp >= stack_page && sp <= stack_page + THREAD_SIZE - nbytes)
+ return 1;
+
+ stack_page = (unsigned long)softirq_ctx[cpu];
+ if (sp >= stack_page && sp <= stack_page + THREAD_SIZE - nbytes)
+ return 1;
+
return 0;
}
@@ -2018,8 +2010,10 @@ int validate_sp(unsigned long sp, struct task_struct *p,
{
unsigned long stack_page = (unsigned long)task_stack_page(p);
- if (sp >= stack_page + sizeof(struct thread_struct)
- && sp <= stack_page + THREAD_SIZE - nbytes)
+ if (sp < THREAD_SIZE)
+ return 0;
+
+ if (sp >= stack_page && sp <= stack_page + THREAD_SIZE - nbytes)
return 1;
return valid_irq_stack(sp, p, nbytes);
@@ -2027,7 +2021,7 @@ int validate_sp(unsigned long sp, struct task_struct *p,
EXPORT_SYMBOL(validate_sp);
-unsigned long get_wchan(struct task_struct *p)
+static unsigned long __get_wchan(struct task_struct *p)
{
unsigned long ip, sp;
int count = 0;
@@ -2053,6 +2047,20 @@ unsigned long get_wchan(struct task_struct *p)
return 0;
}
+unsigned long get_wchan(struct task_struct *p)
+{
+ unsigned long ret;
+
+ if (!try_get_task_stack(p))
+ return 0;
+
+ ret = __get_wchan(p);
+
+ put_task_stack(p);
+
+ return ret;
+}
+
static int kstack_depth_to_print = CONFIG_PRINT_STACK_DEPTH;
void show_stack(struct task_struct *tsk, unsigned long *stack)
@@ -2067,6 +2075,9 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
int curr_frame = 0;
#endif
+ if (!try_get_task_stack(tsk))
+ return;
+
sp = (unsigned long) stack;
if (tsk == NULL)
tsk = current;
@@ -2081,7 +2092,7 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
printk("Call Trace:\n");
do {
if (!validate_sp(sp, tsk, STACK_FRAME_OVERHEAD))
- return;
+ break;
stack = (unsigned long *) sp;
newsp = stack[0];
@@ -2121,6 +2132,8 @@ void show_stack(struct task_struct *tsk, unsigned long *stack)
sp = newsp;
} while (count++ < kstack_depth_to_print);
+
+ put_task_stack(tsk);
}
#ifdef CONFIG_PPC64
diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index ca00fbb97cf8..3d0dab1647fe 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -938,7 +938,7 @@ void __init setup_arch(char **cmdline_p)
/* Reserve large chunks of memory for use by CMA for KVM. */
kvm_cma_reserve();
- klp_init_thread_info(&init_thread_info);
+ klp_init_thread_info(&init_task);
init_mm.start_code = (unsigned long)_stext;
init_mm.end_code = (unsigned long) _etext;
diff --git a/arch/powerpc/kernel/setup_32.c b/arch/powerpc/kernel/setup_32.c
index 947f904688b0..1f0b7629c1a6 100644
--- a/arch/powerpc/kernel/setup_32.c
+++ b/arch/powerpc/kernel/setup_32.c
@@ -196,6 +196,17 @@ static int __init ppc_init(void)
}
arch_initcall(ppc_init);
+static void *__init alloc_stack(void)
+{
+ void *ptr = memblock_alloc(THREAD_SIZE, THREAD_SIZE);
+
+ if (!ptr)
+ panic("cannot allocate %d bytes for stack at %pS\n",
+ THREAD_SIZE, (void *)_RET_IP_);
+
+ return ptr;
+}
+
void __init irqstack_early_init(void)
{
unsigned int i;
@@ -203,10 +214,8 @@ void __init irqstack_early_init(void)
/* interrupt stacks must be in lowmem, we get that for free on ppc32
* as the memblock is limited to lowmem by default */
for_each_possible_cpu(i) {
- softirq_ctx[i] = (struct thread_info *)
- __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
- hardirq_ctx[i] = (struct thread_info *)
- __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
+ softirq_ctx[i] = alloc_stack();
+ hardirq_ctx[i] = alloc_stack();
}
}
@@ -224,13 +233,10 @@ void __init exc_lvl_early_init(void)
hw_cpu = 0;
#endif
- critirq_ctx[hw_cpu] = (struct thread_info *)
- __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
+ critirq_ctx[hw_cpu] = alloc_stack();
#ifdef CONFIG_BOOKE
- dbgirq_ctx[hw_cpu] = (struct thread_info *)
- __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
- mcheckirq_ctx[hw_cpu] = (struct thread_info *)
- __va(memblock_phys_alloc(THREAD_SIZE, THREAD_SIZE));
+ dbgirq_ctx[hw_cpu] = alloc_stack();
+ mcheckirq_ctx[hw_cpu] = alloc_stack();
#endif
}
}
diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c
index 236c1151a3a7..daa361fc6a24 100644
--- a/arch/powerpc/kernel/setup_64.c
+++ b/arch/powerpc/kernel/setup_64.c
@@ -634,19 +634,17 @@ __init u64 ppc64_bolted_size(void)
static void *__init alloc_stack(unsigned long limit, int cpu)
{
- unsigned long pa;
+ void *ptr;
BUILD_BUG_ON(STACK_INT_FRAME_SIZE % 16);
- pa = memblock_alloc_base_nid(THREAD_SIZE, THREAD_SIZE, limit,
- early_cpu_to_node(cpu), MEMBLOCK_NONE);
- if (!pa) {
- pa = memblock_alloc_base(THREAD_SIZE, THREAD_SIZE, limit);
- if (!pa)
- panic("cannot allocate stacks");
- }
+ ptr = memblock_alloc_try_nid(THREAD_SIZE, THREAD_SIZE,
+ MEMBLOCK_LOW_LIMIT, limit,
+ early_cpu_to_node(cpu));
+ if (!ptr)
+ panic("cannot allocate stacks");
- return __va(pa);
+ return ptr;
}
void __init irqstack_early_init(void)
@@ -692,24 +690,6 @@ void __init exc_lvl_early_init(void)
#endif
/*
- * Emergency stacks are used for a range of things, from asynchronous
- * NMIs (system reset, machine check) to synchronous, process context.
- * We set preempt_count to zero, even though that isn't necessarily correct. To
- * get the right value we'd need to copy it from the previous thread_info, but
- * doing that might fault causing more problems.
- * TODO: what to do with accounting?
- */
-static void emerg_stack_init_thread_info(struct thread_info *ti, int cpu)
-{
- ti->task = NULL;
- ti->cpu = cpu;
- ti->preempt_count = 0;
- ti->local_flags = 0;
- ti->flags = 0;
- klp_init_thread_info(ti);
-}
-
-/*
* Stack space used when we detect a bad kernel stack pointer, and
* early in SMP boots before relocation is enabled. Exclusive emergency
* stack for machine checks.
@@ -736,25 +716,14 @@ void __init emergency_stack_init(void)
limit = min(ppc64_bolted_size(), ppc64_rma_size);
for_each_possible_cpu(i) {
- struct thread_info *ti;
-
- ti = alloc_stack(limit, i);
- memset(ti, 0, THREAD_SIZE);
- emerg_stack_init_thread_info(ti, i);
- paca_ptrs[i]->emergency_sp = (void *)ti + THREAD_SIZE;
+ paca_ptrs[i]->emergency_sp = alloc_stack(limit, i) + THREAD_SIZE;
#ifdef CONFIG_PPC_BOOK3S_64
/* emergency stack for NMI exception handling. */
- ti = alloc_stack(limit, i);
- memset(ti, 0, THREAD_SIZE);
- emerg_stack_init_thread_info(ti, i);
- paca_ptrs[i]->nmi_emergency_sp = (void *)ti + THREAD_SIZE;
+ paca_ptrs[i]->nmi_emergency_sp = alloc_stack(limit, i) + THREAD_SIZE;
/* emergency stack for machine check exception handling. */
- ti = alloc_stack(limit, i);
- memset(ti, 0, THREAD_SIZE);
- emerg_stack_init_thread_info(ti, i);
- paca_ptrs[i]->mc_emergency_sp = (void *)ti + THREAD_SIZE;
+ paca_ptrs[i]->mc_emergency_sp = alloc_stack(limit, i) + THREAD_SIZE;
#endif
}
}
diff --git a/arch/powerpc/kernel/smp.c b/arch/powerpc/kernel/smp.c
index 3f15edf25a0d..a41fa8924004 100644
--- a/arch/powerpc/kernel/smp.c
+++ b/arch/powerpc/kernel/smp.c
@@ -20,6 +20,7 @@
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/sched/mm.h>
+#include <linux/sched/task_stack.h>
#include <linux/sched/topology.h>
#include <linux/smp.h>
#include <linux/interrupt.h>
@@ -75,7 +76,7 @@
static DEFINE_PER_CPU(int, cpu_state) = { 0 };
#endif
-struct thread_info *secondary_ti;
+struct task_struct *secondary_current;
bool has_big_cores;
DEFINE_PER_CPU(cpumask_var_t, cpu_sibling_map);
@@ -663,7 +664,7 @@ void smp_send_stop(void)
}
#endif /* CONFIG_NMI_IPI */
-struct thread_info *current_set[NR_CPUS];
+struct task_struct *current_set[NR_CPUS];
static void smp_store_cpu_info(int id)
{
@@ -928,7 +929,7 @@ void smp_prepare_boot_cpu(void)
paca_ptrs[boot_cpuid]->__current = current;
#endif
set_numa_node(numa_cpu_lookup_table[boot_cpuid]);
- current_set[boot_cpuid] = task_thread_info(current);
+ current_set[boot_cpuid] = current;
}
#ifdef CONFIG_HOTPLUG_CPU
@@ -1013,14 +1014,13 @@ static bool secondaries_inhibited(void)
static void cpu_idle_thread_init(unsigned int cpu, struct task_struct *idle)
{
- struct thread_info *ti = task_thread_info(idle);
-
#ifdef CONFIG_PPC64
paca_ptrs[cpu]->__current = idle;
- paca_ptrs[cpu]->kstack = (unsigned long)ti + THREAD_SIZE - STACK_FRAME_OVERHEAD;
+ paca_ptrs[cpu]->kstack = (unsigned long)task_stack_page(idle) +
+ THREAD_SIZE - STACK_FRAME_OVERHEAD;
#endif
- ti->cpu = cpu;
- secondary_ti = current_set[cpu] = ti;
+ idle->cpu = cpu;
+ secondary_current = current_set[cpu] = idle;
}
int __cpu_up(unsigned int cpu, struct task_struct *tidle)
diff --git a/arch/powerpc/kernel/stacktrace.c b/arch/powerpc/kernel/stacktrace.c
index cf31ce6c1f53..f958f3bcba04 100644
--- a/arch/powerpc/kernel/stacktrace.c
+++ b/arch/powerpc/kernel/stacktrace.c
@@ -67,12 +67,17 @@ void save_stack_trace_tsk(struct task_struct *tsk, struct stack_trace *trace)
{
unsigned long sp;
+ if (!try_get_task_stack(tsk))
+ return;
+
if (tsk == current)
sp = current_stack_pointer();
else
sp = tsk->thread.ksp;
save_context_stack(trace, sp, tsk, 0);
+
+ put_task_stack(tsk);
}
EXPORT_SYMBOL_GPL(save_stack_trace_tsk);
@@ -90,9 +95,8 @@ EXPORT_SYMBOL_GPL(save_stack_trace_regs);
*
* If the task is not 'current', the caller *must* ensure the task is inactive.
*/
-int
-save_stack_trace_tsk_reliable(struct task_struct *tsk,
- struct stack_trace *trace)
+static int __save_stack_trace_tsk_reliable(struct task_struct *tsk,
+ struct stack_trace *trace)
{
unsigned long sp;
unsigned long newsp;
@@ -197,6 +201,25 @@ save_stack_trace_tsk_reliable(struct task_struct *tsk,
}
return 0;
}
+
+int save_stack_trace_tsk_reliable(struct task_struct *tsk,
+ struct stack_trace *trace)
+{
+ int ret;
+
+ /*
+ * If the task doesn't have a stack (e.g., a zombie), the stack is
+ * "reliably" empty.
+ */
+ if (!try_get_task_stack(tsk))
+ return 0;
+
+ ret = __save_stack_trace_tsk_reliable(tsk, trace);
+
+ put_task_stack(tsk);
+
+ return ret;
+}
EXPORT_SYMBOL_GPL(save_stack_trace_tsk_reliable);
#endif /* CONFIG_HAVE_RELIABLE_STACKTRACE */
diff --git a/arch/powerpc/kernel/trace/ftrace_64_mprofile.S b/arch/powerpc/kernel/trace/ftrace_64_mprofile.S
index 32476a6e4e9c..17ec02cb2f58 100644
--- a/arch/powerpc/kernel/trace/ftrace_64_mprofile.S
+++ b/arch/powerpc/kernel/trace/ftrace_64_mprofile.S
@@ -229,7 +229,7 @@ ftrace_call:
* - r0, r11 & r12 are free
*/
livepatch_handler:
- CURRENT_THREAD_INFO(r12, r1)
+ ld r12, PACA_CURRENT_TI(r13)
/* Allocate 3 x 8 bytes */
ld r11, TI_livepatch_sp(r12)
@@ -256,7 +256,7 @@ livepatch_handler:
* restore it.
*/
- CURRENT_THREAD_INFO(r12, r1)
+ ld r12, PACA_CURRENT_TI(r13)
ld r11, TI_livepatch_sp(r12)
@@ -273,7 +273,7 @@ livepatch_handler:
ld r2, -24(r11)
/* Pop livepatch stack frame */
- CURRENT_THREAD_INFO(r12, r1)
+ ld r12, PACA_CURRENT_TI(r13)
subi r11, r11, 24
std r11, TI_livepatch_sp(r12)
diff --git a/arch/powerpc/kvm/book3s_hv_hmi.c b/arch/powerpc/kvm/book3s_hv_hmi.c
index e3f738eb1cac..64b5011475c7 100644
--- a/arch/powerpc/kvm/book3s_hv_hmi.c
+++ b/arch/powerpc/kvm/book3s_hv_hmi.c
@@ -24,6 +24,7 @@
#include <linux/compiler.h>
#include <asm/paca.h>
#include <asm/hmi.h>
+#include <asm/processor.h>
void wait_for_subcore_guest_exit(void)
{
diff --git a/arch/powerpc/mm/hash_low_32.S b/arch/powerpc/mm/hash_low_32.S
index 1e2df3e9f9ea..5bee2d982959 100644
--- a/arch/powerpc/mm/hash_low_32.S
+++ b/arch/powerpc/mm/hash_low_32.S
@@ -186,8 +186,7 @@ _GLOBAL(add_hash_page)
add r3,r3,r0 /* note create_hpte trims to 24 bits */
#ifdef CONFIG_SMP
- CURRENT_THREAD_INFO(r8, r1) /* use cpu number to make tag */
- lwz r8,TI_CPU(r8) /* to go in mmu_hash_lock */
+ lwz r8,TASK_CPU(r2) /* to go in mmu_hash_lock */
oris r8,r8,12
#endif /* CONFIG_SMP */
@@ -549,9 +548,8 @@ _GLOBAL(flush_hash_pages)
#ifdef CONFIG_SMP
addis r9,r7,mmu_hash_lock@ha
addi r9,r9,mmu_hash_lock@l
- CURRENT_THREAD_INFO(r8, r1)
- add r8,r8,r7
- lwz r8,TI_CPU(r8)
+ add r8,r2,r7
+ lwz r8,TASK_CPU(r8)
oris r8,r8,9
10: lwarx r0,0,r9
cmpi 0,r0,0
@@ -646,8 +644,7 @@ EXPORT_SYMBOL(flush_hash_pages)
*/
_GLOBAL(_tlbie)
#ifdef CONFIG_SMP
- CURRENT_THREAD_INFO(r8, r1)
- lwz r8,TI_CPU(r8)
+ lwz r8,TASK_CPU(r2)
oris r8,r8,11
mfmsr r10
SYNC
@@ -684,8 +681,7 @@ _GLOBAL(_tlbie)
*/
_GLOBAL(_tlbia)
#if defined(CONFIG_SMP)
- CURRENT_THREAD_INFO(r8, r1)
- lwz r8,TI_CPU(r8)
+ lwz r8,TASK_CPU(r2)
oris r8,r8,10
mfmsr r10
SYNC
diff --git a/arch/powerpc/net/bpf_jit32.h b/arch/powerpc/net/bpf_jit32.h
index 6f4daacad296..dc50a8d4b3b9 100644
--- a/arch/powerpc/net/bpf_jit32.h
+++ b/arch/powerpc/net/bpf_jit32.h
@@ -106,9 +106,8 @@ DECLARE_LOAD_FUNC(sk_load_byte_msh);
} while (0)
#else
#define PPC_BPF_LOAD_CPU(r) \
- do { BUILD_BUG_ON(FIELD_SIZEOF(struct thread_info, cpu) != 4); \
- PPC_LHZ_OFFS(r, (1 & ~(THREAD_SIZE - 1)), \
- offsetof(struct thread_info, cpu)); \
+ do { BUILD_BUG_ON(FIELD_SIZEOF(struct task_struct, cpu) != 4); \
+ PPC_LHZ_OFFS(r, 2, offsetof(struct task_struct, cpu)); \
} while(0)
#endif
#else
diff --git a/arch/powerpc/sysdev/6xx-suspend.S b/arch/powerpc/sysdev/6xx-suspend.S
index cf48e9cb2575..6c4aec25c4ba 100644
--- a/arch/powerpc/sysdev/6xx-suspend.S
+++ b/arch/powerpc/sysdev/6xx-suspend.S
@@ -29,10 +29,9 @@ _GLOBAL(mpc6xx_enter_standby)
ori r5, r5, ret_from_standby@l
mtlr r5
- CURRENT_THREAD_INFO(r5, r1)
- lwz r6, TI_LOCAL_FLAGS(r5)
+ lwz r6, TI_LOCAL_FLAGS(r2)
ori r6, r6, _TLF_SLEEPING
- stw r6, TI_LOCAL_FLAGS(r5)
+ stw r6, TI_LOCAL_FLAGS(r2)
mfmsr r5
ori r5, r5, MSR_EE
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 757b8499aba2..a0f44f992360 100644
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -2997,7 +2997,7 @@ static void show_task(struct task_struct *tsk)
printf("%px %016lx %6d %6d %c %2d %s\n", tsk,
tsk->thread.ksp,
tsk->pid, rcu_dereference(tsk->parent)->pid,
- state, task_thread_info(tsk)->cpu,
+ state, task_cpu(tsk),
tsk->comm);
}
--
2.13.3