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s390/unwind: add machine check handler stack 

Fixes: b61b159512 ("s390: add stack for machine check handler")
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
This commit is contained in:
Vasily Gorbik 2021-03-31 11:44:50 +02:00 committed by Heiko Carstens
parent 7a2f91441b
commit 08edb9683e
2 changed files with 12 additions and 1 deletions
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1
arch/s390/include/asm/stacktrace.h
View File

@ -12,6 +12,7 @@ enum stack_type {
STACK_TYPE_IRQ,
STACK_TYPE_NODAT,
STACK_TYPE_RESTART,
STACK_TYPE_MCCK,
};
struct stack_info {

12
arch/s390/kernel/dumpstack.c
View File

@ -79,6 +79,15 @@ static bool in_nodat_stack(unsigned long sp, struct stack_info *info)
return in_stack(sp, info, STACK_TYPE_NODAT, top - THREAD_SIZE, top);
}
static bool in_mcck_stack(unsigned long sp, struct stack_info *info)
{
unsigned long frame_size, top;
frame_size = STACK_FRAME_OVERHEAD + sizeof(struct pt_regs);
top = S390_lowcore.mcck_stack + frame_size;
return in_stack(sp, info, STACK_TYPE_MCCK, top - THREAD_SIZE, top);
}
static bool in_restart_stack(unsigned long sp, struct stack_info *info)
{
unsigned long frame_size, top;
@ -108,7 +117,8 @@ int get_stack_info(unsigned long sp, struct task_struct *task,
/* Check per-cpu stacks */
if (!in_irq_stack(sp, info) &&
!in_nodat_stack(sp, info) &&
!in_restart_stack(sp, info))
!in_restart_stack(sp, info) &&
!in_mcck_stack(sp, info))
goto unknown;
recursion_check: