From patchwork Thu Mar 28 10:37:25 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Murray X-Patchwork-Id: 10874771 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 5CE8B13B5 for ; Thu, 28 Mar 2019 10:38:09 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 42720285DC for ; Thu, 28 Mar 2019 10:38:09 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3616928A8B; Thu, 28 Mar 2019 10:38:09 +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=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham 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 652F1287FA for ; Thu, 28 Mar 2019 10:38:05 +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=vpeD2zFwdy9eBFD88Ens5b82xRhadEbN/4Dwi+K7CNM=; b=GrdPdHv71KFgHj Rm6qZ+fAbdCtHs95y2cR70AwnNi5g7XmMhRmX4whHWYwnpQp8ULXr/Y71YdDZRuolvzbH1GMsqtw/ VMnS9EIviWYuU+/DmDpDHt4BSBV1soSEObpfdB+SkJBFK236hfCeJuyeyYXnGAtA56+ID05P+Um48 DSOoOyS5ML3m9a6SRJ2kkzIOcDPA0cpTMjWZR8jNOn96ni72apWu0yeoOvnJJdy3tSL4hwISzsref qB9dtNMoWVKzK3Bcl7x2lBAdbf0ZOaDafKXXOOJObLe84epDem0uuzrmDpolB5qIup2weij1i7ehM dvDfyZiGWVPbZm07wJRQ==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h9SQ6-0006xc-Tw; Thu, 28 Mar 2019 10:38:02 +0000 Received: from usa-sjc-mx-foss1.foss.arm.com ([217.140.101.70] helo=foss.arm.com) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1h9SPn-0006UA-64 for linux-arm-kernel@lists.infradead.org; Thu, 28 Mar 2019 10:37:48 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 4516F165C; Thu, 28 Mar 2019 03:37:42 -0700 (PDT) Received: from e119886-lin.cambridge.arm.com (unknown [10.37.6.20]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id 2E06A3F59C; Thu, 28 Mar 2019 03:37:40 -0700 (PDT) From: Andrew Murray To: Christoffer Dall , Marc Zyngier , Catalin Marinas , Will Deacon , Mark Rutland Subject: [PATCH v12 2/8] arm64: KVM: encapsulate kvm_cpu_context in kvm_host_data Date: Thu, 28 Mar 2019 10:37:25 +0000 Message-Id: <20190328103731.27264-3-andrew.murray@arm.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190328103731.27264-1-andrew.murray@arm.com> References: <20190328103731.27264-1-andrew.murray@arm.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190328_033743_539513_C2432001 X-CRM114-Status: GOOD ( 15.76 ) 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: Julien Thierry , kvmarm@lists.cs.columbia.edu, linux-arm-kernel@lists.infradead.org, Suzuki K Poulose 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 The virt/arm core allocates a kvm_cpu_context_t percpu, at present this is a typedef to kvm_cpu_context and is used to store host cpu context. The kvm_cpu_context structure is also used elsewhere to hold vcpu context. In order to use the percpu to hold additional future host information we encapsulate kvm_cpu_context in a new structure and rename the typedef and percpu to match. Signed-off-by: Andrew Murray Reviewed-by: Suzuki K Poulose --- arch/arm/include/asm/kvm_host.h | 8 ++++++-- arch/arm64/include/asm/kvm_asm.h | 3 ++- arch/arm64/include/asm/kvm_host.h | 16 ++++++++++------ arch/arm64/kernel/asm-offsets.c | 1 + virt/kvm/arm/arm.c | 14 ++++++++------ 5 files changed, 27 insertions(+), 15 deletions(-) diff --git a/arch/arm/include/asm/kvm_host.h b/arch/arm/include/asm/kvm_host.h index 770d73257ad9..427c28be6452 100644 --- a/arch/arm/include/asm/kvm_host.h +++ b/arch/arm/include/asm/kvm_host.h @@ -150,7 +150,11 @@ struct kvm_cpu_context { u32 cp15[NR_CP15_REGS]; }; -typedef struct kvm_cpu_context kvm_cpu_context_t; +struct kvm_host_data { + struct kvm_cpu_context host_ctxt; +}; + +typedef struct kvm_host_data kvm_host_data_t; static inline void kvm_init_host_cpu_context(kvm_cpu_context_t *cpu_ctxt, int cpu) @@ -182,7 +186,7 @@ struct kvm_vcpu_arch { struct kvm_vcpu_fault_info fault; /* Host FP context */ - kvm_cpu_context_t *host_cpu_context; + struct kvm_cpu_context *host_cpu_context; /* VGIC state */ struct vgic_cpu vgic_cpu; diff --git a/arch/arm64/include/asm/kvm_asm.h b/arch/arm64/include/asm/kvm_asm.h index f5b79e995f40..ff73f5462aca 100644 --- a/arch/arm64/include/asm/kvm_asm.h +++ b/arch/arm64/include/asm/kvm_asm.h @@ -108,7 +108,8 @@ extern u32 __kvm_get_mdcr_el2(void); .endm .macro get_host_ctxt reg, tmp - hyp_adr_this_cpu \reg, kvm_host_cpu_state, \tmp + hyp_adr_this_cpu \reg, kvm_host_data, \tmp + add \reg, \reg, #HOST_DATA_CONTEXT .endm .macro get_vcpu_ptr vcpu, ctxt diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index a01fe087e022..6530ad522a16 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -212,7 +212,11 @@ struct kvm_cpu_context { struct kvm_vcpu *__hyp_running_vcpu; }; -typedef struct kvm_cpu_context kvm_cpu_context_t; +struct kvm_host_data { + struct kvm_cpu_context host_ctxt; +}; + +typedef struct kvm_host_data kvm_host_data_t; struct vcpu_reset_state { unsigned long pc; @@ -255,7 +259,7 @@ struct kvm_vcpu_arch { struct kvm_guest_debug_arch external_debug_state; /* Pointer to host CPU context */ - kvm_cpu_context_t *host_cpu_context; + struct kvm_cpu_context *host_cpu_context; struct thread_info *host_thread_info; /* hyp VA */ struct user_fpsimd_state *host_fpsimd_state; /* hyp VA */ @@ -432,9 +436,9 @@ void kvm_set_sei_esr(struct kvm_vcpu *vcpu, u64 syndrome); struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr); -DECLARE_PER_CPU(kvm_cpu_context_t, kvm_host_cpu_state); +DECLARE_PER_CPU(kvm_host_data_t, kvm_host_data); -static inline void kvm_init_host_cpu_context(kvm_cpu_context_t *cpu_ctxt, +static inline void kvm_init_host_cpu_context(struct kvm_cpu_context *cpu_ctxt, int cpu) { /* The host's MPIDR is immutable, so let's set it up at boot time */ @@ -452,8 +456,8 @@ static inline void __cpu_init_hyp_mode(phys_addr_t pgd_ptr, * kernel's mapping to the linear mapping, and store it in tpidr_el2 * so that we can use adr_l to access per-cpu variables in EL2. */ - u64 tpidr_el2 = ((u64)this_cpu_ptr(&kvm_host_cpu_state) - - (u64)kvm_ksym_ref(kvm_host_cpu_state)); + u64 tpidr_el2 = ((u64)this_cpu_ptr(&kvm_host_data) - + (u64)kvm_ksym_ref(kvm_host_data)); /* * Call initialization code, and switch to the full blown HYP code. diff --git a/arch/arm64/kernel/asm-offsets.c b/arch/arm64/kernel/asm-offsets.c index 7f40dcbdd51d..fbf0409cc2be 100644 --- a/arch/arm64/kernel/asm-offsets.c +++ b/arch/arm64/kernel/asm-offsets.c @@ -128,6 +128,7 @@ int main(void) DEFINE(CPU_GP_REGS, offsetof(struct kvm_cpu_context, gp_regs)); DEFINE(CPU_USER_PT_REGS, offsetof(struct kvm_regs, regs)); DEFINE(HOST_CONTEXT_VCPU, offsetof(struct kvm_cpu_context, __hyp_running_vcpu)); + DEFINE(HOST_DATA_CONTEXT, offsetof(struct kvm_host_data, host_ctxt)); #endif #ifdef CONFIG_CPU_PM DEFINE(CPU_CTX_SP, offsetof(struct cpu_suspend_ctx, sp)); diff --git a/virt/kvm/arm/arm.c b/virt/kvm/arm/arm.c index 99c37384ba7b..6bcda52c0ea6 100644 --- a/virt/kvm/arm/arm.c +++ b/virt/kvm/arm/arm.c @@ -56,7 +56,7 @@ __asm__(".arch_extension virt"); #endif -DEFINE_PER_CPU(kvm_cpu_context_t, kvm_host_cpu_state); +DEFINE_PER_CPU(kvm_host_data_t, kvm_host_data); static DEFINE_PER_CPU(unsigned long, kvm_arm_hyp_stack_page); /* Per-CPU variable containing the currently running vcpu. */ @@ -360,8 +360,10 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) { int *last_ran; + kvm_host_data_t *cpu_data; last_ran = this_cpu_ptr(vcpu->kvm->arch.last_vcpu_ran); + cpu_data = this_cpu_ptr(&kvm_host_data); /* * We might get preempted before the vCPU actually runs, but @@ -373,7 +375,7 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) } vcpu->cpu = cpu; - vcpu->arch.host_cpu_context = this_cpu_ptr(&kvm_host_cpu_state); + vcpu->arch.host_cpu_context = &cpu_data->host_ctxt; kvm_arm_set_running_vcpu(vcpu); kvm_vgic_load(vcpu); @@ -1549,11 +1551,11 @@ static int init_hyp_mode(void) } for_each_possible_cpu(cpu) { - kvm_cpu_context_t *cpu_ctxt; + kvm_host_data_t *cpu_data; - cpu_ctxt = per_cpu_ptr(&kvm_host_cpu_state, cpu); - kvm_init_host_cpu_context(cpu_ctxt, cpu); - err = create_hyp_mappings(cpu_ctxt, cpu_ctxt + 1, PAGE_HYP); + cpu_data = per_cpu_ptr(&kvm_host_data, cpu); + kvm_init_host_cpu_context(&cpu_data->host_ctxt, cpu); + err = create_hyp_mappings(cpu_data, cpu_data + 1, PAGE_HYP); if (err) { kvm_err("Cannot map host CPU state: %d\n", err);