From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.windriver.com (mail.windriver.com [147.11.1.11]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client CN "mail.windriver.com", Issuer "Intel External Basic Issuing CA 3A" (not verified)) by ozlabs.org (Postfix) with ESMTPS id D67012C0441 for ; Wed, 23 Oct 2013 20:31:44 +1100 (EST) From: Tiejun Chen To: Subject: [v6][PATCH 5/5] powerpc/book3e/kgdb: Fix a single stgep case of lazy IRQ Date: Wed, 23 Oct 2013 17:31:25 +0800 Message-ID: <1382520685-11609-6-git-send-email-tiejun.chen@windriver.com> In-Reply-To: <1382520685-11609-1-git-send-email-tiejun.chen@windriver.com> References: <1382520685-11609-1-git-send-email-tiejun.chen@windriver.com> MIME-Version: 1.0 Content-Type: text/plain Cc: linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , In lazy EE magic, we may have a lazy interrupt occured while entering kgdb, but we really don't want to replay that interrupt for kgdb, so we have to clear the PACA_IRQ_HARD_DIS force to make sure we can exit directly from this debug exception. Signed-off-by: Tiejun Chen --- arch/powerpc/kernel/kgdb.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/powerpc/kernel/kgdb.c b/arch/powerpc/kernel/kgdb.c index 447c14b..9872f58 100644 --- a/arch/powerpc/kernel/kgdb.c +++ b/arch/powerpc/kernel/kgdb.c @@ -185,6 +185,14 @@ static int kgdb_singlestep(struct pt_regs *regs) /* Restore current_thread_info lastly. */ memcpy(exception_thread_info, backup_current_thread_info, sizeof *thread_info); +#ifdef CONFIG_PPC64 + /* + * Clear the PACA_IRQ_HARD_DIS from the pending mask + * since we are about to exit this directly from debug + * exception without any replay interrupt in lazy EE case. + */ + local_paca->irq_happened &= ~PACA_IRQ_HARD_DIS; +#endif return 1; } -- 1.7.9.5