From patchwork Sat Mar 3 16:09:38 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Dongjiu Geng X-Patchwork-Id: 10256021 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 96D7B602B5 for ; Sat, 3 Mar 2018 08:06:23 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 88DFD2871D for ; Sat, 3 Mar 2018 08:06:23 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7C6B52871F; Sat, 3 Mar 2018 08:06:23 +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=0.0 required=2.0 tests=BAYES_00, DATE_IN_FUTURE_06_12, DKIM_SIGNED,DKIM_VALID autolearn=unavailable version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id C4E972871D for ; Sat, 3 Mar 2018 08:06:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=1kkYpvG08yQMLe9D3lxJiQW2dvhxTG0isIubh4YenDU=; b=ccgFAgw0Cmdp7J CJMDVqdtG0nCegIMjILiM4fwUxc/BOIzhh+s/jX4icC+3MIUFAYAlRygmqLR1wSpdiY6CEO0X4vKV GXqyD1kvrJurhk0JSMPPzMAYfG+rjj/Zfu6qL14GqcaSvQUvF88YvAYFGwr8ffyp2Bfn7AhBBYL5o k5JZiy78rQmy5uqbWToBPcejhMgrqvtFvWLMG6fZaButnQJnEMu1bFEwXwXuFkgtazPaxU2VF+gkS mM99AGnRdimi0T8jYCd0qICuQxtqD192VV39MfstUFHFAjPqjBotoVWgj7B5Q2fWEUeQQEnPpFlRC s+vB6al4kuoYbDf5P1xA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.89 #1 (Red Hat Linux)) id 1es2BJ-0002F6-OK; Sat, 03 Mar 2018 08:06:13 +0000 Received: from [45.249.212.32] (helo=huawei.com) by bombadil.infradead.org with esmtps (Exim 4.89 #1 (Red Hat Linux)) id 1es29L-0008C3-ES for linux-arm-kernel@lists.infradead.org; Sat, 03 Mar 2018 08:04:21 +0000 Received: from DGGEMS402-HUB.china.huawei.com (unknown [172.30.72.59]) by Forcepoint Email with ESMTP id 161A8E4903507; Sat, 3 Mar 2018 16:03:47 +0800 (CST) Received: from localhost.localdomain (10.143.28.90) by DGGEMS402-HUB.china.huawei.com (10.3.19.202) with Microsoft SMTP Server id 14.3.361.1; Sat, 3 Mar 2018 16:03:39 +0800 From: Dongjiu Geng To: , , , , , , , , , , , , , , , , Subject: [PATCH v10 3/5] arm/arm64: KVM: Introduce set and get per-vcpu event Date: Sun, 4 Mar 2018 00:09:38 +0800 Message-ID: <1520093380-42577-4-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 X-Originating-IP: [10.143.28.90] X-CFilter-Loop: Reflected X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20180303_000412_181675_4DE0EB7B X-CRM114-Status: GOOD ( 12.99 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: huangshaoyu@huawei.com, gengdongjiu@huawei.com Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP RAS Extension provides VSESR_EL2 register to specify virtual SError syndrome value, this patch adds a new IOCTL to export user-invisible states related to SError exceptions. User space can setup the kvm_vcpu_events to inject specified SError, also it can support live migration. Signed-off-by: Dongjiu Geng --- Documentation/virtual/kvm/api.txt | 26 ++++++++++++++++++++++++-- arch/arm/include/asm/kvm_host.h | 6 ++++++ arch/arm/kvm/guest.c | 12 ++++++++++++ arch/arm64/include/asm/kvm_host.h | 5 +++++ arch/arm64/include/uapi/asm/kvm.h | 10 ++++++++++ arch/arm64/kvm/guest.c | 26 ++++++++++++++++++++++++++ arch/arm64/kvm/reset.c | 1 + virt/kvm/arm/arm.c | 18 ++++++++++++++++++ 8 files changed, 102 insertions(+), 2 deletions(-) diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt index 8a3d708..26ae151 100644 --- a/Documentation/virtual/kvm/api.txt +++ b/Documentation/virtual/kvm/api.txt @@ -819,11 +819,13 @@ struct kvm_clock_data { Capability: KVM_CAP_VCPU_EVENTS Extended by: KVM_CAP_INTR_SHADOW -Architectures: x86 +Architectures: x86, arm, arm64 Type: vm ioctl Parameters: struct kvm_vcpu_event (out) Returns: 0 on success, -1 on error +X86: + Gets currently pending exceptions, interrupts, and NMIs as well as related states of the vcpu. @@ -865,15 +867,29 @@ Only two fields are defined in the flags field: - KVM_VCPUEVENT_VALID_SMM may be set in the flags field to signal that smi contains a valid state. +ARM, ARM64: + +Gets currently pending SError exceptions as well as related states of the vcpu. + +struct kvm_vcpu_events { + struct { + bool serror_pending; + bool serror_has_esr; + u64 serror_esr; + } exception; +}; + 4.32 KVM_SET_VCPU_EVENTS Capability: KVM_CAP_VCPU_EVENTS Extended by: KVM_CAP_INTR_SHADOW -Architectures: x86 +Architectures: x86, arm, arm64 Type: vm ioctl Parameters: struct kvm_vcpu_event (in) Returns: 0 on success, -1 on error +X86: + Set pending exceptions, interrupts, and NMIs as well as related states of the vcpu. @@ -894,6 +910,12 @@ shall be written into the VCPU. KVM_VCPUEVENT_VALID_SMM can only be set if KVM_CAP_X86_SMM is available. +ARM, ARM64: + +Set pending SError exceptions as well as related states of the vcpu. + +See KVM_GET_VCPU_EVENTS for the data structure. + 4.33 KVM_GET_DEBUGREGS diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index ef54013..d81621e 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -211,6 +211,12 @@ struct kvm_vcpu_stat { int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); +int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events); + +int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events); + unsigned long kvm_call_hyp(void *hypfn, ...); void force_vm_exit(const cpumask_t *mask); diff --git a/arch/arm/kvm/guest.c b/arch/arm/kvm/guest.c index 1e0784e..39f895d 100644 --- a/arch/arm/kvm/guest.c +++ b/arch/arm/kvm/guest.c @@ -248,6 +248,18 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, return -EINVAL; } +int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events) +{ + return -EINVAL; +} + +int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events) +{ + return -EINVAL; +} + int __attribute_const__ kvm_target_cpu(void) { switch (read_cpuid_part()) { diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 3dc49b7..1125540 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -326,6 +326,11 @@ struct kvm_vcpu_stat { int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices); int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg); +int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events); + +int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events); #define KVM_ARCH_WANT_MMU_NOTIFIER int kvm_unmap_hva(struct kvm *kvm, unsigned long hva); diff --git a/arch/arm64/include/uapi/asm/kvm.h b/arch/arm64/include/uapi/asm/kvm.h index 9abbf30..32c0eae 100644 --- a/arch/arm64/include/uapi/asm/kvm.h +++ b/arch/arm64/include/uapi/asm/kvm.h @@ -39,6 +39,7 @@ #define __KVM_HAVE_GUEST_DEBUG #define __KVM_HAVE_IRQ_LINE #define __KVM_HAVE_READONLY_MEM +#define __KVM_HAVE_VCPU_EVENTS #define KVM_COALESCED_MMIO_PAGE_OFFSET 1 @@ -153,6 +154,15 @@ struct kvm_sync_regs { struct kvm_arch_memory_slot { }; +/* for KVM_GET/SET_VCPU_EVENTS */ +struct kvm_vcpu_events { + struct { + bool serror_pending; + bool serror_has_esr; + u64 serror_esr; + } exception; +}; + /* If you need to interpret the index values, here is the key: */ #define KVM_REG_ARM_COPROC_MASK 0x000000000FFF0000 #define KVM_REG_ARM_COPROC_SHIFT 16 diff --git a/arch/arm64/kvm/guest.c b/arch/arm64/kvm/guest.c index 5c7f657..62d49c2 100644 --- a/arch/arm64/kvm/guest.c +++ b/arch/arm64/kvm/guest.c @@ -277,6 +277,32 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, return -EINVAL; } +int kvm_arm_vcpu_get_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events) +{ + events->exception.serror_pending = (vcpu_get_hcr(vcpu) & HCR_VSE); + events->exception.serror_has_esr = + cpus_have_const_cap(ARM64_HAS_RAS_EXTN) && + (!!vcpu_get_vsesr(vcpu)); + events->exception.serror_esr = vcpu_get_vsesr(vcpu); + + return 0; +} + +int kvm_arm_vcpu_set_events(struct kvm_vcpu *vcpu, + struct kvm_vcpu_events *events) +{ + bool injected = events->exception.serror_pending; + bool has_esr = events->exception.serror_has_esr; + + if (injected && has_esr) + kvm_set_sei_esr(vcpu, events->exception.serror_esr); + else if (injected) + kvm_inject_vabt(vcpu); + + return 0; +} + int __attribute_const__ kvm_target_cpu(void) { unsigned long implementor = read_cpuid_implementor(); diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c index 38c8a64..20e919a 100644 --- a/arch/arm64/kvm/reset.c +++ b/arch/arm64/kvm/reset.c @@ -82,6 +82,7 @@ int kvm_arch_dev_ioctl_check_extension(struct kvm *kvm, long ext) break; case KVM_CAP_SET_GUEST_DEBUG: case KVM_CAP_VCPU_ATTRIBUTES: + case KVM_CAP_VCPU_EVENTS: r = 1; break; default: diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 7e3941f..30c56e0 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -1051,6 +1051,24 @@ long kvm_arch_vcpu_ioctl(struct file *filp, return -EFAULT; return kvm_arm_vcpu_has_attr(vcpu, &attr); } + case KVM_GET_VCPU_EVENTS: { + struct kvm_vcpu_events events; + + kvm_arm_vcpu_get_events(vcpu, &events); + + if (copy_to_user(argp, &events, sizeof(struct kvm_vcpu_events))) + return -EFAULT; + + return 0; + } + case KVM_SET_VCPU_EVENTS: { + struct kvm_vcpu_events events; + + if (copy_from_user(&events, argp, sizeof(struct kvm_vcpu_events))) + return -EFAULT; + + return kvm_arm_vcpu_set_events(vcpu, &events); + } default: return -EINVAL; }