linux-kernel - [PATCH v12 4/4] arm64: handle NOTIFY_SEI notification by the APEI driver

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <1526417887-25843-5-git-send-email-gengdongjiu@huawei.com>
Date:   Wed, 16 May 2018 04:58:07 +0800
From:   Dongjiu Geng <gengdongjiu@...wei.com>
To:     <rkrcmar@...hat.com>, <corbet@....net>, <christoffer.dall@....com>,
        <marc.zyngier@....com>, <james.morse@....com>,
        <linux@...linux.org.uk>, <catalin.marinas@....com>,
        <rjw@...ysocki.net>, <bp@...en8.de>, <lenb@...nel.org>,
        <kvm@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <kvmarm@...ts.cs.columbia.edu>, <linux-acpi@...r.kernel.org>,
        <devel@...ica.org>
CC:     <gengdongjiu@...wei.com>, <huangshaoyu@...wei.com>,
        <zhengxiang9@...wei.com>
Subject: [PATCH v12 4/4] arm64: handle NOTIFY_SEI notification by the APEI driver

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 <gengdongjiu@...wei.com>
---
 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 bbb0fde..d888eb2 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