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softirq: Move __ARCH_HAS_DO_SOFTIRQ to Kconfig

Browse Source 
To prepare for inlining do_softirq_own_stack() replace
__ARCH_HAS_DO_SOFTIRQ with a Kconfig switch and select it in the affected
architectures.

This allows in the next step to move the function prototype and the inline
stub into a seperate asm-generic header file which is required to avoid
include recursion.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Kees Cook <keescook@chromium.org>
Link: https://lore.kernel.org/r/20210210002513.181713427@linutronix.de
This commit is contained in:
Thomas Gleixner 2021-02-10 00:40:52 +01:00
parent 624db9eabc
commit cd1a41ceba
14 changed files with 13 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/Kconfig
View File

@ -759,6 +759,12 @@ config HAVE_IRQ_EXIT_ON_IRQ_STACK
This spares a stack switch and improves cache usage on softirq
processing.
config HAVE_SOFTIRQ_ON_OWN_STACK
bool
help
Architecture provides a function to run __do_softirq() on a
seperate stack.
config PGTABLE_LEVELS
int
default 2

1
arch/parisc/Kconfig
View File

@ -63,6 +63,7 @@ config PARISC
select HAVE_FTRACE_MCOUNT_RECORD if HAVE_DYNAMIC_FTRACE
select HAVE_KPROBES_ON_FTRACE
select HAVE_DYNAMIC_FTRACE_WITH_REGS
select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS
select SET_FS
help

4
arch/parisc/include/asm/hardirq.h
View File

@ -12,10 +12,6 @@
#include <linux/threads.h>
#include <linux/irq.h>
#ifdef CONFIG_IRQSTACKS
#define __ARCH_HAS_DO_SOFTIRQ
#endif
typedef struct {
unsigned int __softirq_pending;
unsigned int kernel_stack_usage;

1
arch/powerpc/Kconfig
View File

@ -237,6 +237,7 @@ config PPC
select MMU_GATHER_PAGE_SIZE
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RELIABLE_STACKTRACE if PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
select HAVE_SOFTIRQ_ON_OWN_STACK
select HAVE_SYSCALL_TRACEPOINTS
select HAVE_VIRT_CPU_ACCOUNTING
select HAVE_IRQ_TIME_ACCOUNTING

2
arch/powerpc/include/asm/irq.h
View File

@ -37,8 +37,6 @@ extern int distribute_irqs;
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

1
arch/s390/Kconfig
View File

@ -182,6 +182,7 @@ config S390
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RELIABLE_STACKTRACE
select HAVE_RSEQ
select HAVE_SOFTIRQ_ON_OWN_STACK
select HAVE_SYSCALL_TRACEPOINTS
select HAVE_VIRT_CPU_ACCOUNTING
select HAVE_VIRT_CPU_ACCOUNTING_IDLE

1
arch/s390/include/asm/hardirq.h
View File

@ -18,7 +18,6 @@
#define or_softirq_pending(x) (S390_lowcore.softirq_pending |= (x))
#define __ARCH_IRQ_STAT
#define __ARCH_HAS_DO_SOFTIRQ
#define __ARCH_IRQ_EXIT_IRQS_DISABLED
static inline void ack_bad_irq(unsigned int irq)

1
arch/sh/Kconfig
View File

@ -56,6 +56,7 @@ config SUPERH
select HAVE_PERF_EVENTS
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_UID16
select HAVE_SOFTIRQ_ON_OWN_STACK if IRQSTACKS
select HAVE_STACKPROTECTOR
select HAVE_SYSCALL_TRACEPOINTS
select IRQ_FORCED_THREADING

1
arch/sh/include/asm/irq.h
View File

@ -51,7 +51,6 @@ asmlinkage int do_IRQ(unsigned int irq, struct pt_regs *regs);
#ifdef CONFIG_IRQSTACKS
extern void irq_ctx_init(int cpu);
extern void irq_ctx_exit(int cpu);
# define __ARCH_HAS_DO_SOFTIRQ
#else
# define irq_ctx_init(cpu) do { } while (0)
# define irq_ctx_exit(cpu) do { } while (0)

1
arch/sparc/Kconfig
View File

@ -97,6 +97,7 @@ config SPARC64
select ARCH_HAS_PTE_SPECIAL
select PCI_DOMAINS if PCI
select ARCH_HAS_GIGANTIC_PAGE
select HAVE_SOFTIRQ_ON_OWN_STACK
config ARCH_PROC_KCORE_TEXT
def_bool y

1
arch/sparc/include/asm/irq_64.h
View File

@ -93,7 +93,6 @@ void arch_trigger_cpumask_backtrace(const struct cpumask *mask,
extern void *hardirq_stack[NR_CPUS];
extern void *softirq_stack[NR_CPUS];
#define __ARCH_HAS_DO_SOFTIRQ
#define NO_IRQ 0xffffffff

1
arch/x86/Kconfig
View File

@ -221,6 +221,7 @@ config X86
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_RELIABLE_STACKTRACE if X86_64 && (UNWINDER_FRAME_POINTER || UNWINDER_ORC) && STACK_VALIDATION
select HAVE_FUNCTION_ARG_ACCESS_API
select HAVE_SOFTIRQ_ON_OWN_STACK
select HAVE_STACKPROTECTOR if CC_HAS_SANE_STACKPROTECTOR
select HAVE_STACK_VALIDATION if X86_64
select HAVE_STATIC_CALL

2
arch/x86/include/asm/irq.h
View File

@ -25,8 +25,6 @@ static inline int irq_canonicalize(int irq)
extern int irq_init_percpu_irqstack(unsigned int cpu);
#define __ARCH_HAS_DO_SOFTIRQ
struct irq_desc;
extern void fixup_irqs(void);

2
include/linux/interrupt.h
View File

@ -569,7 +569,7 @@ struct softirq_action
asmlinkage void do_softirq(void);
asmlinkage void __do_softirq(void);
#ifdef __ARCH_HAS_DO_SOFTIRQ
#ifdef CONFIG_HAVE_SOFTIRQ_ON_OWN_STACK
void do_softirq_own_stack(void);
#else
static inline void do_softirq_own_stack(void)