mirror of
https://github.com/Fishwaldo/Star64_linux.git
synced 2025-07-23 23:32:14 +00:00
ed1cd6deb0
This patch activates CONFIG_THREAD_INFO_IN_TASK which
moves the thread_info into task_struct.
Moving thread_info into task_struct has the following advantages:
- It protects thread_info from corruption in the case of stack
overflows.
- Its address is harder to determine if stack addresses are leaked,
making a number of attacks more difficult.
This has the following consequences:
- thread_info is now located at the beginning of task_struct.
- The 'cpu' field is now in task_struct, and only exists when
CONFIG_SMP is active.
- thread_info doesn't have anymore the 'task' field.
This patch:
- Removes all recopy of thread_info struct when the stack changes.
- Changes the CURRENT_THREAD_INFO() macro to point to current.
- Selects CONFIG_THREAD_INFO_IN_TASK.
- Modifies raw_smp_processor_id() to get ->cpu from current without
including linux/sched.h to avoid circular inclusion and without
including asm/asm-offsets.h to avoid symbol names duplication
between ASM constants and C constants.
- Modifies klp_init_thread_info() to take a task_struct pointer
argument.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Reviewed-by: Nicholas Piggin <npiggin@gmail.com>
[mpe: Add task_stack.h to livepatch.h to fix build fails]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
71 lines
1.7 KiB
C
71 lines
1.7 KiB
C
#ifdef __KERNEL__
|
|
#ifndef _ASM_POWERPC_IRQ_H
|
|
#define _ASM_POWERPC_IRQ_H
|
|
|
|
/*
|
|
* 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/irqdomain.h>
|
|
#include <linux/threads.h>
|
|
#include <linux/list.h>
|
|
#include <linux/radix-tree.h>
|
|
|
|
#include <asm/types.h>
|
|
#include <linux/atomic.h>
|
|
|
|
|
|
extern atomic_t ppc_n_lost_interrupts;
|
|
|
|
/* This number is used when no interrupt has been assigned */
|
|
#define NO_IRQ (0)
|
|
|
|
/* Total number of virq in the platform */
|
|
#define NR_IRQS CONFIG_NR_IRQS
|
|
|
|
/* Same thing, used by the generic IRQ code */
|
|
#define NR_IRQS_LEGACY NUM_ISA_INTERRUPTS
|
|
|
|
extern irq_hw_number_t virq_to_hw(unsigned int virq);
|
|
|
|
static __inline__ int irq_canonicalize(int irq)
|
|
{
|
|
return irq;
|
|
}
|
|
|
|
extern int distribute_irqs;
|
|
|
|
struct irqaction;
|
|
struct pt_regs;
|
|
|
|
#define __ARCH_HAS_DO_SOFTIRQ
|
|
|
|
#if defined(CONFIG_BOOKE) || defined(CONFIG_40x)
|
|
/*
|
|
* 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];
|
|
#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];
|
|
|
|
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);
|
|
|
|
int irq_choose_cpu(const struct cpumask *mask);
|
|
|
|
#endif /* _ASM_IRQ_H */
|
|
#endif /* __KERNEL__ */
|