Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752943AbdFZMY7 (ORCPT ); Mon, 26 Jun 2017 08:24:59 -0400 Received: from szxga02-in.huawei.com ([45.249.212.188]:8854 "EHLO szxga02-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752911AbdFZMYi (ORCPT ); Mon, 26 Jun 2017 08:24:38 -0400 From: Dongjiu Geng To: , , , , , , , , , , , , , , , , Subject: [PATCH v4 2/3] arm64: kvm: route synchronous external abort exceptions to el2 Date: Mon, 26 Jun 2017 20:45:56 +0800 Message-ID: <1498481156-23572-1-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=0001.0A0B0207.5950FCEA.019E,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: 6570574e97ae0555c55b008d72498f71 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1670 Lines: 45 In the firmware-first RAS solution, guest OS receives an synchronous external abort, then trapped to EL3 by SCR_EL3.EA. Firmware inspects the HCR_EL2.TEA and chooses the target to send APEI's SEA notification. If the SCR_EL3.EA is set, delegates the error exception to the hypervisor, otherwise it delegates to the guest OS kernel Signed-off-by: Dongjiu Geng --- arch/arm64/include/asm/kvm_arm.h | 2 ++ arch/arm64/include/asm/kvm_emulate.h | 7 +++++++ 2 files changed, 9 insertions(+) diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 61d694c..1188272 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -23,6 +23,8 @@ #include /* Hyp Configuration Register (HCR) bits */ +#define HCR_TEA (UL(1) << 37) +#define HCR_TERR (UL(1) << 36) #define HCR_E2H (UL(1) << 34) #define HCR_ID (UL(1) << 33) #define HCR_CD (UL(1) << 32) diff --git a/arch/arm64/include/asm/kvm_emulate.h b/arch/arm64/include/asm/kvm_emulate.h index f5ea0ba..5f64ab2 100644 --- a/arch/arm64/include/asm/kvm_emulate.h +++ b/arch/arm64/include/asm/kvm_emulate.h @@ -47,6 +47,13 @@ static inline void vcpu_reset_hcr(struct kvm_vcpu *vcpu) vcpu->arch.hcr_el2 = HCR_GUEST_FLAGS; if (is_kernel_in_hyp_mode()) vcpu->arch.hcr_el2 |= HCR_E2H; + if (cpus_have_const_cap(ARM64_HAS_RAS_EXTN)) { + /* route synchronous external abort exceptions to EL2 */ + vcpu->arch.hcr_el2 |= HCR_TEA; + /* trap error record accesses */ + vcpu->arch.hcr_el2 |= HCR_TERR; + } + if (test_bit(KVM_ARM_VCPU_EL1_32BIT, vcpu->arch.features)) vcpu->arch.hcr_el2 &= ~HCR_RW; } -- 2.10.1