From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932165AbeCCIFJ (ORCPT ); Sat, 3 Mar 2018 03:05:09 -0500 Received: from szxga07-in.huawei.com ([45.249.212.35]:43926 "EHLO huawei.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1751821AbeCCIDv (ORCPT ); Sat, 3 Mar 2018 03:03:51 -0500 From: Dongjiu Geng To: , , , , , , , , , , , , , , , , CC: , Subject: [PATCH v10 5/5] arm64: handle NOTIFY_SEI notification by the APEI driver Date: Sun, 4 Mar 2018 00:09:40 +0800 Message-ID: <1520093380-42577-6-git-send-email-gengdongjiu@huawei.com> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1520093380-42577-1-git-send-email-gengdongjiu@huawei.com> References: <1520093380-42577-1-git-send-email-gengdongjiu@huawei.com> MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.143.28.90] X-CFilter-Loop: Reflected Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Add a helper to handle the NOTIFY_SEI notification, when kernel gets the NOTIFY_SEI notification, call this helper and let APEI driver to handle this notification. Signed-off-by: Dongjiu Geng --- arch/arm64/include/asm/system_misc.h | 1 + arch/arm64/kernel/traps.c | 4 ++++ arch/arm64/mm/fault.c | 10 ++++++++++ 3 files changed, 15 insertions(+) diff --git a/arch/arm64/include/asm/system_misc.h b/arch/arm64/include/asm/system_misc.h index 07aa8e3..9ee13ad 100644 --- a/arch/arm64/include/asm/system_misc.h +++ b/arch/arm64/include/asm/system_misc.h @@ -57,6 +57,7 @@ void hook_debug_fault_code(int nr, int (*fn)(unsigned long, unsigned int, }) int handle_guest_sea(phys_addr_t addr, unsigned int esr); +int handle_guest_sei(void); #endif /* __ASSEMBLY__ */ diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index e88096a..6cb280f 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -681,6 +681,10 @@ bool arm64_is_fatal_ras_serror(struct pt_regs *regs, unsigned int esr) { u32 aet = arm64_ras_serror_get_severity(esr); + /* The APEI driver may handle this RAS error. */ + if (!handle_guest_sei()) + return false; + switch (aet) { case ESR_ELx_AET_CE: /* corrected error */ case ESR_ELx_AET_UEO: /* restartable, not yet consumed */ diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index f76bb2c..8f29bd8 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -683,6 +683,16 @@ int handle_guest_sea(phys_addr_t addr, unsigned int esr) return ret; } +int handle_guest_sei(void) +{ + int ret = -ENOENT; + + if (IS_ENABLED(CONFIG_ACPI_APEI_SEI)) + ret = ghes_notify_sei(); + + return ret; +} + asmlinkage void __exception do_mem_abort(unsigned long addr, unsigned int esr, struct pt_regs *regs) { -- 1.9.1