From patchwork Wed Dec 7 21:48:23 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tyler Baicar X-Patchwork-Id: 9465311 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id C2FB1607D3 for ; Wed, 7 Dec 2016 21:50:35 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id AA2F228506 for ; Wed, 7 Dec 2016 21:50:35 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 9E88428595; Wed, 7 Dec 2016 21:50:35 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1FDFE28587 for ; Wed, 7 Dec 2016 21:50:35 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933282AbcLGVuR (ORCPT ); Wed, 7 Dec 2016 16:50:17 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:41174 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933070AbcLGVuN (ORCPT ); Wed, 7 Dec 2016 16:50:13 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 2F36E622E0; Wed, 7 Dec 2016 21:49:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1481147412; bh=86YYD+gPWsFz7R4MuzupFsScR2A6m5z8nhwC2E6eimE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=RO0AcUJloLMGswfT9e0nffSyGO9NdBuvjNo3r0Mgwjxl7GBgHzi6H36dPd+HZgUwh xZkRSQHQ0V5yMaR7H0YoLnXmaobJObIIv6mretV2r8LSTharMNgxbJ0NoMkgn8YCEO oqUNDqCGQ0+7VeTltmqoc6mHqWJRNkFggXhOuNtI= Received: from tbaicar-lnx.qualcomm.com (unknown [129.46.14.132]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: tbaicar@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 940C461714; Wed, 7 Dec 2016 21:49:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1481147372; bh=86YYD+gPWsFz7R4MuzupFsScR2A6m5z8nhwC2E6eimE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=a4bwTvo/+tWPng4qa0o1aq7JZODAIglZz2Ivv00YRmt9fdb7oRLMUL+sNKH944dSh rUGJ4BdJ6r9TOXoKICgU/2lXUCiRtFN4sICMcuIXWiNq4amEFJjKZG82zJJzt2Aqmk +C+5u1xngVOXdjD9WKD/dd/OJiBm+bfdwMSldhxU= DMARC-Filter: OpenDMARC Filter v1.3.1 smtp.codeaurora.org 940C461714 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=pass smtp.mailfrom=tbaicar@codeaurora.org From: Tyler Baicar To: christoffer.dall@linaro.org, marc.zyngier@arm.com, pbonzini@redhat.com, rkrcmar@redhat.com, linux@armlinux.org.uk, catalin.marinas@arm.com, will.deacon@arm.com, rjw@rjwysocki.net, lenb@kernel.org, matt@codeblueprint.co.uk, robert.moore@intel.com, lv.zheng@intel.com, nkaje@codeaurora.org, zjzhang@codeaurora.org, mark.rutland@arm.com, james.morse@arm.com, akpm@linux-foundation.org, eun.taik.lee@samsung.com, sandeepa.s.prabhu@gmail.com, labbott@redhat.com, shijie.huang@arm.com, rruigrok@codeaurora.org, paul.gortmaker@windriver.com, tn@semihalf.com, fu.wei@linaro.org, rostedt@goodmis.org, bristot@redhat.com, linux-arm-kernel@lists.infradead.org, kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, linux-efi@vger.kernel.org, devel@acpica.org, Suzuki.Poulose@arm.com, punit.agrawal@arm.com, astone@redhat.com, harba@codeaurora.org, hanjun.guo@linaro.org, john.garry@huawei.com, shiju.jose@huawei.com Cc: Tyler Baicar Subject: [PATCH V6 10/10] arm/arm64: KVM: add guest SEA support Date: Wed, 7 Dec 2016 14:48:23 -0700 Message-Id: <1481147303-7979-11-git-send-email-tbaicar@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1481147303-7979-1-git-send-email-tbaicar@codeaurora.org> References: <1481147303-7979-1-git-send-email-tbaicar@codeaurora.org> Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Currently external aborts are unsupported by the guest abort handling. Add handling for SEAs so that the host kernel reports SEAs which occur in the guest kernel. Signed-off-by: Tyler Baicar --- arch/arm/include/asm/kvm_arm.h | 1 + arch/arm/include/asm/system_misc.h | 5 +++++ arch/arm/kvm/mmu.c | 18 ++++++++++++++++-- arch/arm64/include/asm/kvm_arm.h | 1 + arch/arm64/include/asm/system_misc.h | 2 ++ arch/arm64/mm/fault.c | 13 +++++++++++++ 6 files changed, 38 insertions(+), 2 deletions(-) diff --git a/arch/arm/include/asm/kvm_arm.h b/arch/arm/include/asm/kvm_arm.h index e22089f..33a77509 100644 --- a/arch/arm/include/asm/kvm_arm.h +++ b/arch/arm/include/asm/kvm_arm.h @@ -187,6 +187,7 @@ #define FSC_FAULT (0x04) #define FSC_ACCESS (0x08) #define FSC_PERM (0x0c) +#define FSC_EXTABT (0x10) /* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */ #define HPFAR_MASK (~0xf) diff --git a/arch/arm/include/asm/system_misc.h b/arch/arm/include/asm/system_misc.h index a3d61ad..ea45d94 100644 --- a/arch/arm/include/asm/system_misc.h +++ b/arch/arm/include/asm/system_misc.h @@ -24,4 +24,9 @@ extern unsigned int user_debug; #endif /* !__ASSEMBLY__ */ +static inline int handle_guest_sea(unsigned long addr, unsigned int esr) +{ + return -1; +} + #endif /* __ASM_ARM_SYSTEM_MISC_H */ diff --git a/arch/arm/kvm/mmu.c b/arch/arm/kvm/mmu.c index e9a5c0e..1152966 100644 --- a/arch/arm/kvm/mmu.c +++ b/arch/arm/kvm/mmu.c @@ -29,6 +29,7 @@ #include #include #include +#include #include "trace.h" @@ -1441,8 +1442,21 @@ int kvm_handle_guest_abort(struct kvm_vcpu *vcpu, struct kvm_run *run) /* Check the stage-2 fault is trans. fault or write fault */ fault_status = kvm_vcpu_trap_get_fault_type(vcpu); - if (fault_status != FSC_FAULT && fault_status != FSC_PERM && - fault_status != FSC_ACCESS) { + + /* The host kernel will handle the synchronous external abort. There + * is no need to pass the error into the guest. + */ + if (fault_status == FSC_EXTABT) { + if(handle_guest_sea((unsigned long)fault_ipa, + kvm_vcpu_get_hsr(vcpu))) { + kvm_err("Failed to handle guest SEA, FSC: EC=%#x xFSC=%#lx ESR_EL2=%#lx\n", + kvm_vcpu_trap_get_class(vcpu), + (unsigned long)kvm_vcpu_trap_get_fault(vcpu), + (unsigned long)kvm_vcpu_get_hsr(vcpu)); + return -EFAULT; + } + } else if (fault_status != FSC_FAULT && fault_status != FSC_PERM && + fault_status != FSC_ACCESS) { kvm_err("Unsupported FSC: EC=%#x xFSC=%#lx ESR_EL2=%#lx\n", kvm_vcpu_trap_get_class(vcpu), (unsigned long)kvm_vcpu_trap_get_fault(vcpu), diff --git a/arch/arm64/include/asm/kvm_arm.h b/arch/arm64/include/asm/kvm_arm.h index 4b5c977..be0efb6 100644 --- a/arch/arm64/include/asm/kvm_arm.h +++ b/arch/arm64/include/asm/kvm_arm.h @@ -201,6 +201,7 @@ #define FSC_FAULT ESR_ELx_FSC_FAULT #define FSC_ACCESS ESR_ELx_FSC_ACCESS #define FSC_PERM ESR_ELx_FSC_PERM +#define FSC_EXTABT ESR_ELx_FSC_EXTABT /* Hyp Prefetch Fault Address Register (HPFAR/HDFAR) */ #define HPFAR_MASK (~UL(0xf)) diff --git a/arch/arm64/include/asm/system_misc.h b/arch/arm64/include/asm/system_misc.h index 9040e1d..3a142a5 100644 --- a/arch/arm64/include/asm/system_misc.h +++ b/arch/arm64/include/asm/system_misc.h @@ -77,4 +77,6 @@ extern void (*arm_pm_restart)(enum reboot_mode reboot_mode, const char *cmd); int register_synchronous_ext_abort_notifier(struct notifier_block *nb); void unregister_synchronous_ext_abort_notifier(struct notifier_block *nb); +int handle_guest_sea(unsigned long addr, unsigned int esr); + #endif /* __ASM_SYSTEM_MISC_H */ diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index fcc49f1..691399e 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -597,6 +597,19 @@ static const char *fault_name(unsigned int esr) } /* + * Handle Synchronous External Aborts that occur in a guest kernel. + */ +int handle_guest_sea(unsigned long addr, unsigned int esr) +{ + atomic_notifier_call_chain(&sea_handler_chain, 0, NULL); + + pr_err("Synchronous External Abort: %s (0x%08x) at 0x%016lx\n", + fault_name(esr), esr, addr); + + return 0; +} + +/* * Dispatch a data abort to the relevant handler. */ asmlinkage void __exception do_mem_abort(unsigned long addr, unsigned int esr,