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Commit 160c7324 authored by Tiejun Chen's avatar Tiejun Chen Committed by Scott Wood
Browse files

powerpc/book3e: initialize crit/mc/dbg kernel stack pointers 



We already allocated critical/machine/debug check exceptions, but
we also should initialize those associated kernel stack pointers
for use by special exceptions in the PACA.

Signed-off-by: default avatarTiejun Chen <tiejun.chen@windriver.com>
Signed-off-by: default avatarScott Wood <scottwood@freescale.com>
parent b0b7dcbd

arch/powerpc/kernel/setup_64.c

+12 −6
Original line number Original line Diff line number Diff line
@@ -552,14 +552,20 @@ static void __init irqstack_early_init(void) 
static void __init exc_lvl_early_init(void)

static void __init exc_lvl_early_init(void)

{

{

	unsigned int i;

	unsigned int i;

	unsigned long sp;





	for_each_possible_cpu(i) {

	for_each_possible_cpu(i) {

		critirq_ctx[i] = (struct thread_info *)

		sp = memblock_alloc(THREAD_SIZE, THREAD_SIZE);

			__va(memblock_alloc(THREAD_SIZE, THREAD_SIZE));

		critirq_ctx[i] = (struct thread_info *)__va(sp);

		dbgirq_ctx[i] = (struct thread_info *)

		paca[i].crit_kstack = __va(sp + THREAD_SIZE);

			__va(memblock_alloc(THREAD_SIZE, THREAD_SIZE));



		mcheckirq_ctx[i] = (struct thread_info *)

		sp = memblock_alloc(THREAD_SIZE, THREAD_SIZE);

			__va(memblock_alloc(THREAD_SIZE, THREAD_SIZE));

		dbgirq_ctx[i] = (struct thread_info *)__va(sp);

		paca[i].dbg_kstack = __va(sp + THREAD_SIZE);



		sp = memblock_alloc(THREAD_SIZE, THREAD_SIZE);

		mcheckirq_ctx[i] = (struct thread_info *)__va(sp);

		paca[i].mc_kstack = __va(sp + THREAD_SIZE);

	}

	}





	if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC))

	if (cpu_has_feature(CPU_FTR_DEBUG_LVL_EXC))