Commit f60ad4ed authored by Mark Rutland's avatar Mark Rutland

arm64: clean up irq stack definitions

Before we add yet another stack to the kernel, it would be nice to
ensure that we consistently organise stack definitions and related
helper functions.

This patch moves the basic IRQ stack defintions to <asm/memory.h> to
live with their task stack counterparts. Helpers used for unwinding are
moved into <asm/stacktrace.h>, where subsequent patches will add helpers
for other stacks. Includes are fixed up accordingly.

This patch is a pure refactoring -- there should be no functional
changes as a result of this patch.
Signed-off-by: default avatarMark Rutland <mark.rutland@arm.com>
Reviewed-by: default avatarWill Deacon <will.deacon@arm.com>
Tested-by: default avatarLaura Abbott <labbott@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: James Morse <james.morse@arm.com>
parent dbc9344a
#ifndef __ASM_IRQ_H #ifndef __ASM_IRQ_H
#define __ASM_IRQ_H #define __ASM_IRQ_H
#define IRQ_STACK_SIZE THREAD_SIZE
#ifndef __ASSEMBLER__ #ifndef __ASSEMBLER__
#include <linux/percpu.h>
#include <linux/sched/task_stack.h>
#include <asm-generic/irq.h> #include <asm-generic/irq.h>
#include <asm/thread_info.h>
struct pt_regs; struct pt_regs;
DECLARE_PER_CPU(unsigned long [IRQ_STACK_SIZE/sizeof(long)], irq_stack);
extern void set_handle_irq(void (*handle_irq)(struct pt_regs *)); extern void set_handle_irq(void (*handle_irq)(struct pt_regs *));
static inline int nr_legacy_irqs(void) static inline int nr_legacy_irqs(void)
...@@ -22,21 +14,5 @@ static inline int nr_legacy_irqs(void) ...@@ -22,21 +14,5 @@ static inline int nr_legacy_irqs(void)
return 0; return 0;
} }
static inline bool on_irq_stack(unsigned long sp)
{
unsigned long low = (unsigned long)raw_cpu_ptr(irq_stack);
unsigned long high = low + IRQ_STACK_SIZE;
return (low <= sp && sp < high);
}
static inline bool on_task_stack(struct task_struct *tsk, unsigned long sp)
{
unsigned long low = (unsigned long)task_stack_page(tsk);
unsigned long high = low + THREAD_SIZE;
return (low <= sp && sp < high);
}
#endif /* !__ASSEMBLER__ */ #endif /* !__ASSEMBLER__ */
#endif #endif
...@@ -110,6 +110,8 @@ ...@@ -110,6 +110,8 @@
#define THREAD_SIZE (UL(1) << THREAD_SHIFT) #define THREAD_SIZE (UL(1) << THREAD_SHIFT)
#define IRQ_STACK_SIZE THREAD_SIZE
/* /*
* Memory types available. * Memory types available.
*/ */
......
...@@ -16,7 +16,12 @@ ...@@ -16,7 +16,12 @@
#ifndef __ASM_STACKTRACE_H #ifndef __ASM_STACKTRACE_H
#define __ASM_STACKTRACE_H #define __ASM_STACKTRACE_H
struct task_struct; #include <linux/percpu.h>
#include <linux/sched.h>
#include <linux/sched/task_stack.h>
#include <asm/memory.h>
#include <asm/ptrace.h>
struct stackframe { struct stackframe {
unsigned long fp; unsigned long fp;
...@@ -31,4 +36,22 @@ extern void walk_stackframe(struct task_struct *tsk, struct stackframe *frame, ...@@ -31,4 +36,22 @@ extern void walk_stackframe(struct task_struct *tsk, struct stackframe *frame,
int (*fn)(struct stackframe *, void *), void *data); int (*fn)(struct stackframe *, void *), void *data);
extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk); extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk);
DECLARE_PER_CPU(unsigned long [IRQ_STACK_SIZE/sizeof(long)], irq_stack);
static inline bool on_irq_stack(unsigned long sp)
{
unsigned long low = (unsigned long)raw_cpu_ptr(irq_stack);
unsigned long high = low + IRQ_STACK_SIZE;
return (low <= sp && sp < high);
}
static inline bool on_task_stack(struct task_struct *tsk, unsigned long sp)
{
unsigned long low = (unsigned long)task_stack_page(tsk);
unsigned long high = low + THREAD_SIZE;
return (low <= sp && sp < high);
}
#endif /* __ASM_STACKTRACE_H */ #endif /* __ASM_STACKTRACE_H */
...@@ -42,6 +42,7 @@ ...@@ -42,6 +42,7 @@
#include <asm/compat.h> #include <asm/compat.h>
#include <asm/debug-monitors.h> #include <asm/debug-monitors.h>
#include <asm/pgtable.h> #include <asm/pgtable.h>
#include <asm/stacktrace.h>
#include <asm/syscall.h> #include <asm/syscall.h>
#include <asm/traps.h> #include <asm/traps.h>
#include <asm/system_misc.h> #include <asm/system_misc.h>
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment