Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753439AbdHRNt4 (ORCPT ); Fri, 18 Aug 2017 09:49:56 -0400 Received: from szxga04-in.huawei.com ([45.249.212.190]:4503 "EHLO szxga04-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753365AbdHRNtj (ORCPT ); Fri, 18 Aug 2017 09:49:39 -0400 From: Dongjiu Geng To: , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , CC: , , , , Subject: [PATCH v5 0/7] Add RAS virtualization support to SEA/SEI notification type Date: Fri, 18 Aug 2017 22:11:50 +0800 Message-ID: <1503065517-7920-1-git-send-email-gengdongjiu@huawei.com> X-Mailer: git-send-email 1.7.7 MIME-Version: 1.0 Content-Type: text/plain X-Originating-IP: [10.67.187.203] X-CFilter-Loop: Reflected X-Mirapoint-Virus-RAPID-Raw: score=unknown(0), refid=str=0001.0A090203.5996F034.0104,ss=1,re=0.000,recu=0.000,reip=0.000,cl=1,cld=1,fgs=0, ip=0.0.0.0, so=2014-11-16 11:51:01, dmn=2013-03-21 17:37:32 X-Mirapoint-Loop-Id: 81cf970c033c1b68a9dd534256e58d06 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2588 Lines: 60 In the firmware-first RAS solution, corrupt data is detected in a memory location when guest OS application software executing at EL0 or guest OS kernel El1 software are reading from the memory. The memory node records errors in an error record accessible using system registers. Because SCR_EL3.EA is 1, then CPU will trap to El3 firmware, EL3 firmware records the error to APEI table through reading system register. Because the error was taken from a lower Exception leve, if the exception is SEA/SEI and HCR_EL2.TEA/HCR_EL2.AMO is 1, firmware sets ESR_EL2/FAR_El to fake a exception trap to EL2, then transfers to hypervisor. Hypervisor calls the momory failure to deal with this error, momory failure read the APEI table and decide whether it needs to deliver SIGBUS signal to user space, the advantage of using SIGBUS signal to notify user space is that it can be compatible Non-Kvm users. Dongjiu Geng (5): acpi: apei: Add SEI notification type support for ARMv8 support user space to query RAS extension feature arm64: kvm: route synchronous external abort exceptions to el2 KVM: arm/arm64: Allow get exception syndrome and arm64: kvm: handle SEI notification and inject virtual SError James Morse (1): KVM: arm64: Save ESR_EL2 on guest SError Xie XiuQi (1): arm64: cpufeature: Detect CPU RAS Extentions arch/arm/include/asm/kvm_host.h | 2 ++ arch/arm/kvm/guest.c | 5 +++ arch/arm64/Kconfig | 16 ++++++++++ arch/arm64/include/asm/barrier.h | 1 + arch/arm64/include/asm/cpucaps.h | 3 +- arch/arm64/include/asm/kvm_arm.h | 2 ++ arch/arm64/include/asm/kvm_emulate.h | 17 ++++++++++ arch/arm64/include/asm/kvm_host.h | 2 ++ arch/arm64/include/asm/sysreg.h | 5 +++ arch/arm64/include/asm/system_misc.h | 1 + arch/arm64/include/uapi/asm/kvm.h | 5 +++ arch/arm64/kernel/cpufeature.c | 13 ++++++++ arch/arm64/kernel/process.c | 3 ++ arch/arm64/kvm/guest.c | 48 +++++++++++++++++++++++++++++ arch/arm64/kvm/handle_exit.c | 21 +++++++++++-- arch/arm64/kvm/hyp/switch.c | 29 +++++++++++++++-- arch/arm64/kvm/reset.c | 3 ++ arch/arm64/mm/fault.c | 21 +++++++++++-- drivers/acpi/apei/Kconfig | 15 +++++++++ drivers/acpi/apei/ghes.c | 60 +++++++++++++++++++++++------------- include/acpi/ghes.h | 2 +- include/uapi/linux/kvm.h | 3 ++ virt/kvm/arm/arm.c | 7 +++++ 23 files changed, 254 insertions(+), 30 deletions(-) -- 2.14.0