From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from na01-bl2-obe.outbound.protection.outlook.com (mail-bl2lp0206.outbound.protection.outlook.com [207.46.163.206]) (using TLSv1 with cipher AES128-SHA (128/128 bits)) (No client certificate requested) by ozlabs.org (Postfix) with ESMTPS id C26622C00CD for ; Fri, 14 Mar 2014 11:01:14 +1100 (EST) From: Scott Wood To: Benjamin Herrenschmidt Subject: [PATCH 01/10] powerpc/book3e: initialize crit/mc/dbg kernel stack pointers Date: Thu, 13 Mar 2014 19:00:40 -0500 Message-ID: <1394755249-8856-2-git-send-email-scottwood@freescale.com> In-Reply-To: <1394755249-8856-1-git-send-email-scottwood@freescale.com> References: <1394755249-8856-1-git-send-email-scottwood@freescale.com> MIME-Version: 1.0 Content-Type: text/plain Cc: Scott Wood , Tiejun Chen , linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Tiejun Chen 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: Tiejun Chen Signed-off-by: Scott Wood --- arch/powerpc/kernel/setup_64.c | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/arch/powerpc/kernel/setup_64.c b/arch/powerpc/kernel/setup_64.c index f5f11a7..da9c42f 100644 --- a/arch/powerpc/kernel/setup_64.c +++ b/arch/powerpc/kernel/setup_64.c @@ -552,14 +552,20 @@ static void __init irqstack_early_init(void) static void __init exc_lvl_early_init(void) { unsigned int i; + unsigned long sp; for_each_possible_cpu(i) { - critirq_ctx[i] = (struct thread_info *) - __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE)); - dbgirq_ctx[i] = (struct thread_info *) - __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE)); - mcheckirq_ctx[i] = (struct thread_info *) - __va(memblock_alloc(THREAD_SIZE, THREAD_SIZE)); + sp = memblock_alloc(THREAD_SIZE, THREAD_SIZE); + critirq_ctx[i] = (struct thread_info *)__va(sp); + paca[i].crit_kstack = __va(sp + THREAD_SIZE); + + sp = 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)) -- 1.8.3.2