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From: Sean Christopherson <sean.j.christopherson@intel.com>
To: Marc Zyngier <maz@kernel.org>, James Hogan <jhogan@kernel.org>,
	Paul Mackerras <paulus@ozlabs.org>,
	Christian Borntraeger <borntraeger@de.ibm.com>,
	Janosch Frank <frankja@linux.ibm.com>,
	Paolo Bonzini <pbonzini@redhat.com>
Cc: James Morse <james.morse@arm.com>,
	Julien Thierry <julien.thierry.kdev@gmail.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	David Hildenbrand <david@redhat.com>,
	Cornelia Huck <cohuck@redhat.com>,
	Sean Christopherson <sean.j.christopherson@intel.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Wanpeng Li <wanpengli@tencent.com>,
	Jim Mattson <jmattson@google.com>, Joerg Roedel <joro@8bytes.org>,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, linux-mips@vger.kernel.org,
	kvm-ppc@vger.kernel.org, kvm@vger.kernel.org,
	linux-kernel@vger.kernel.org, Greg Kurz <groug@kaod.org>
Subject: [PATCH v2 38/45] KVM: x86: Move all vcpu init code into kvm_arch_vcpu_create()
Date: Wed, 18 Dec 2019 13:55:23 -0800	[thread overview]
Message-ID: <20191218215530.2280-39-sean.j.christopherson@intel.com> (raw)
In-Reply-To: <20191218215530.2280-1-sean.j.christopherson@intel.com>

Fold init() into create() now that the two are called back-to-back by
common KVM code (kvm_vcpu_init() calls kvm_arch_vcpu_init() as its last
action, and kvm_vm_ioctl_create_vcpu() calls kvm_arch_vcpu_create()
immediately thereafter).  This paves the way for removing
kvm_arch_vcpu_init() entirely.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
---
 arch/x86/kvm/x86.c | 198 +++++++++++++++++++++++----------------------
 1 file changed, 100 insertions(+), 98 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 20f8ac086824..24671f487645 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -9100,11 +9100,78 @@ int kvm_arch_vcpu_precreate(struct kvm *kvm, unsigned int id)
 
 int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 {
-	int ret;
+	struct page *page;
+	int r;
 
-	ret = kvm_x86_ops->vcpu_create(vcpu);
-	if (ret)
-		return ret;
+	vcpu->arch.emulate_ctxt.ops = &emulate_ops;
+	if (!irqchip_in_kernel(vcpu->kvm) || kvm_vcpu_is_reset_bsp(vcpu))
+		vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
+	else
+		vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
+
+	kvm_set_tsc_khz(vcpu, max_tsc_khz);
+
+	r = kvm_mmu_create(vcpu);
+	if (r < 0)
+		return r;
+
+	if (irqchip_in_kernel(vcpu->kvm)) {
+		vcpu->arch.apicv_active = kvm_x86_ops->get_enable_apicv(vcpu->kvm);
+		r = kvm_create_lapic(vcpu, lapic_timer_advance_ns);
+		if (r < 0)
+			goto fail_mmu_destroy;
+	} else
+		static_key_slow_inc(&kvm_no_apic_vcpu);
+
+	r = -ENOMEM;
+
+	page = alloc_page(GFP_KERNEL | __GFP_ZERO);
+	if (!page)
+		goto fail_free_lapic;
+	vcpu->arch.pio_data = page_address(page);
+
+	vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4,
+				       GFP_KERNEL_ACCOUNT);
+	if (!vcpu->arch.mce_banks)
+		goto fail_free_pio_data;
+	vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS;
+
+	if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask,
+				GFP_KERNEL_ACCOUNT))
+		goto fail_free_mce_banks;
+
+	vcpu->arch.user_fpu = kmem_cache_zalloc(x86_fpu_cache,
+						GFP_KERNEL_ACCOUNT);
+	if (!vcpu->arch.user_fpu) {
+		pr_err("kvm: failed to allocate userspace's fpu\n");
+		goto free_wbinvd_dirty_mask;
+	}
+
+	vcpu->arch.guest_fpu = kmem_cache_zalloc(x86_fpu_cache,
+						 GFP_KERNEL_ACCOUNT);
+	if (!vcpu->arch.guest_fpu) {
+		pr_err("kvm: failed to allocate vcpu's fpu\n");
+		goto free_user_fpu;
+	}
+	fx_init(vcpu);
+
+	vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET;
+
+	vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu);
+
+	vcpu->arch.pat = MSR_IA32_CR_PAT_DEFAULT;
+
+	kvm_async_pf_hash_reset(vcpu);
+	kvm_pmu_init(vcpu);
+
+	vcpu->arch.pending_external_vector = -1;
+	vcpu->arch.preempted_in_kernel = false;
+
+	kvm_hv_vcpu_init(vcpu);
+
+	r = kvm_x86_ops->vcpu_create(vcpu);
+	if (r)
+		goto free_guest_fpu;
 
 	vcpu->arch.arch_capabilities = kvm_get_arch_capabilities();
 	vcpu->arch.msr_platform_info = MSR_PLATFORM_INFO_CPUID_FAULT;
@@ -9114,6 +9181,22 @@ int kvm_arch_vcpu_create(struct kvm_vcpu *vcpu)
 	kvm_init_mmu(vcpu, false);
 	vcpu_put(vcpu);
 	return 0;
+
+free_guest_fpu:
+	kmem_cache_free(x86_fpu_cache, vcpu->arch.guest_fpu);
+free_user_fpu:
+	kmem_cache_free(x86_fpu_cache, vcpu->arch.user_fpu);
+free_wbinvd_dirty_mask:
+	free_cpumask_var(vcpu->arch.wbinvd_dirty_mask);
+fail_free_mce_banks:
+	kfree(vcpu->arch.mce_banks);
+fail_free_pio_data:
+	free_page((unsigned long)vcpu->arch.pio_data);
+fail_free_lapic:
+	kvm_free_lapic(vcpu);
+fail_mmu_destroy:
+	kvm_mmu_destroy(vcpu);
+	return r;
 }
 
 void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
@@ -9146,6 +9229,8 @@ void kvm_arch_vcpu_postcreate(struct kvm_vcpu *vcpu)
 
 void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 {
+	int idx;
+
 	kvmclock_reset(vcpu);
 
 	kvm_x86_ops->vcpu_free(vcpu);
@@ -9153,6 +9238,17 @@ void kvm_arch_vcpu_destroy(struct kvm_vcpu *vcpu)
 	free_cpumask_var(vcpu->arch.wbinvd_dirty_mask);
 	kmem_cache_free(x86_fpu_cache, vcpu->arch.user_fpu);
 	kmem_cache_free(x86_fpu_cache, vcpu->arch.guest_fpu);
+
+	kvm_hv_vcpu_uninit(vcpu);
+	kvm_pmu_destroy(vcpu);
+	kfree(vcpu->arch.mce_banks);
+	kvm_free_lapic(vcpu);
+	idx = srcu_read_lock(&vcpu->kvm->srcu);
+	kvm_mmu_destroy(vcpu);
+	srcu_read_unlock(&vcpu->kvm->srcu, idx);
+	free_page((unsigned long)vcpu->arch.pio_data);
+	if (!lapic_in_kernel(vcpu))
+		static_key_slow_dec(&kvm_no_apic_vcpu);
 }
 
 void kvm_vcpu_reset(struct kvm_vcpu *vcpu, bool init_event)
@@ -9391,106 +9487,12 @@ EXPORT_SYMBOL_GPL(kvm_no_apic_vcpu);
 
 int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu)
 {
-	struct page *page;
-	int r;
-
-	vcpu->arch.emulate_ctxt.ops = &emulate_ops;
-	if (!irqchip_in_kernel(vcpu->kvm) || kvm_vcpu_is_reset_bsp(vcpu))
-		vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;
-	else
-		vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED;
-
-	kvm_set_tsc_khz(vcpu, max_tsc_khz);
-
-	r = kvm_mmu_create(vcpu);
-	if (r < 0)
-		return r;
-
-	if (irqchip_in_kernel(vcpu->kvm)) {
-		vcpu->arch.apicv_active = kvm_x86_ops->get_enable_apicv(vcpu->kvm);
-		r = kvm_create_lapic(vcpu, lapic_timer_advance_ns);
-		if (r < 0)
-			goto fail_mmu_destroy;
-	} else
-		static_key_slow_inc(&kvm_no_apic_vcpu);
-
-	r = -ENOMEM;
-
-	page = alloc_page(GFP_KERNEL | __GFP_ZERO);
-	if (!page)
-		goto fail_free_lapic;
-	vcpu->arch.pio_data = page_address(page);
-
-	vcpu->arch.mce_banks = kzalloc(KVM_MAX_MCE_BANKS * sizeof(u64) * 4,
-				       GFP_KERNEL_ACCOUNT);
-	if (!vcpu->arch.mce_banks)
-		goto fail_free_pio_data;
-	vcpu->arch.mcg_cap = KVM_MAX_MCE_BANKS;
-
-	if (!zalloc_cpumask_var(&vcpu->arch.wbinvd_dirty_mask,
-				GFP_KERNEL_ACCOUNT))
-		goto fail_free_mce_banks;
-
-	vcpu->arch.user_fpu = kmem_cache_zalloc(x86_fpu_cache,
-						GFP_KERNEL_ACCOUNT);
-	if (!vcpu->arch.user_fpu) {
-		pr_err("kvm: failed to allocate userspace's fpu\n");
-		goto free_wbinvd_dirty_mask;
-	}
-
-	vcpu->arch.guest_fpu = kmem_cache_zalloc(x86_fpu_cache,
-						 GFP_KERNEL_ACCOUNT);
-	if (!vcpu->arch.guest_fpu) {
-		pr_err("kvm: failed to allocate vcpu's fpu\n");
-		goto free_user_fpu;
-	}
-	fx_init(vcpu);
-
-	vcpu->arch.guest_xstate_size = XSAVE_HDR_SIZE + XSAVE_HDR_OFFSET;
-
-	vcpu->arch.maxphyaddr = cpuid_query_maxphyaddr(vcpu);
-
-	vcpu->arch.pat = MSR_IA32_CR_PAT_DEFAULT;
-
-	kvm_async_pf_hash_reset(vcpu);
-	kvm_pmu_init(vcpu);
-
-	vcpu->arch.pending_external_vector = -1;
-	vcpu->arch.preempted_in_kernel = false;
-
-	kvm_hv_vcpu_init(vcpu);
-
 	return 0;
-
-free_user_fpu:
-	kmem_cache_free(x86_fpu_cache, vcpu->arch.user_fpu);
-free_wbinvd_dirty_mask:
-	free_cpumask_var(vcpu->arch.wbinvd_dirty_mask);
-fail_free_mce_banks:
-	kfree(vcpu->arch.mce_banks);
-fail_free_pio_data:
-	free_page((unsigned long)vcpu->arch.pio_data);
-fail_free_lapic:
-	kvm_free_lapic(vcpu);
-fail_mmu_destroy:
-	kvm_mmu_destroy(vcpu);
-	return r;
 }
 
 void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu)
 {
-	int idx;
 
-	kvm_hv_vcpu_uninit(vcpu);
-	kvm_pmu_destroy(vcpu);
-	kfree(vcpu->arch.mce_banks);
-	kvm_free_lapic(vcpu);
-	idx = srcu_read_lock(&vcpu->kvm->srcu);
-	kvm_mmu_destroy(vcpu);
-	srcu_read_unlock(&vcpu->kvm->srcu, idx);
-	free_page((unsigned long)vcpu->arch.pio_data);
-	if (!lapic_in_kernel(vcpu))
-		static_key_slow_dec(&kvm_no_apic_vcpu);
 }
 
 void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu)
-- 
2.24.1


  parent reply	other threads:[~2019-12-18 21:56 UTC|newest]

Thread overview: 75+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-12-18 21:54 [PATCH v2 00/45] KVM: Refactor vCPU creation Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 01/45] KVM: PPC: Book3S HV: Uninit vCPU if vcore creation fails Sean Christopherson
2020-01-20  2:57   ` Paul Mackerras
2019-12-18 21:54 ` [PATCH v2 02/45] KVM: PPC: Book3S PR: Free shared page if mmu initialization fails Sean Christopherson
2020-01-20  3:00   ` Paul Mackerras
2019-12-18 21:54 ` [PATCH v2 03/45] KVM: x86: Free wbinvd_dirty_mask if vCPU creation fails Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 04/45] KVM: VMX: Allocate VPID after initializing VCPU Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 05/45] KVM: VMX: Use direct vcpu pointer during vCPU create/free Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 06/45] KVM: SVM: " Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 07/45] KVM: x86: Allocate vcpu struct in common x86 code Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 08/45] KVM: x86: Move FPU allocation to " Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 09/45] KVM: x86: Move allocation of pio_data page down a few lines Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 10/45] KVM: x86: Move kvm_vcpu_init() invocation to common code Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 11/45] KVM: PPC: e500mc: Add build-time assert that vcpu is at offset 0 Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 12/45] KVM: PPC: Allocate vcpu struct in common PPC code Sean Christopherson
2020-01-20  4:04   ` Paul Mackerras
2020-01-21 11:05     ` Paolo Bonzini
2020-01-21 23:18       ` Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 13/45] KVM: PPC: Book3S PR: Allocate book3s and shadow vcpu after common init Sean Christopherson
2019-12-18 21:54 ` [PATCH v2 14/45] KVM: PPC: e500mc: Move reset of oldpir below call to kvm_vcpu_init() Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 15/45] KVM: PPC: Move kvm_vcpu_init() invocation to common code Sean Christopherson
2020-01-20  3:34   ` Paul Mackerras
2020-01-21 11:08     ` Paolo Bonzini
2020-01-20  3:56   ` Paul Mackerras
2019-12-18 21:55 ` [PATCH v2 16/45] KVM: MIPS: Use kvm_vcpu_cache to allocate vCPUs Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 17/45] KVM: MIPS: Drop kvm_arch_vcpu_free() Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 18/45] KVM: PPC: " Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 19/45] KVM: arm: " Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 20/45] KVM: x86: Remove spurious kvm_mmu_unload() from vcpu destruction path Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 21/45] KVM: x86: Remove spurious clearing of async #PF MSR Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 22/45] KVM: x86: Drop kvm_arch_vcpu_free() Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 23/45] KVM: Remove kvm_arch_vcpu_free() declaration Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 24/45] KVM: Add kvm_arch_vcpu_precreate() to handle pre-allocation issues Sean Christopherson
2019-12-19 19:28   ` Cornelia Huck
2019-12-18 21:55 ` [PATCH v2 25/45] KVM: s390: Move guts of kvm_arch_vcpu_init() into kvm_arch_vcpu_create() Sean Christopherson
2019-12-19 19:39   ` Cornelia Huck
2019-12-18 21:55 ` [PATCH v2 26/45] KVM: s390: Invoke kvm_vcpu_init() before allocating sie_page Sean Christopherson
2019-12-19 19:47   ` Cornelia Huck
2019-12-18 21:55 ` [PATCH v2 27/45] KVM: MIPS: Invoke kvm_vcpu_uninit() immediately prior to freeing vcpu Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 28/45] KVM: x86: " Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 29/45] KVM: Introduce kvm_vcpu_destroy() Sean Christopherson
2019-12-19 19:51   ` Cornelia Huck
2019-12-18 21:55 ` [PATCH v2 30/45] KVM: Move vcpu alloc and init invocation to common code Sean Christopherson
2019-12-20  9:33   ` Cornelia Huck
2019-12-20 15:53     ` Sean Christopherson
2019-12-20 16:00       ` Cornelia Huck
2020-01-26  3:02   ` Guenter Roeck
2019-12-18 21:55 ` [PATCH v2 31/45] KVM: Unexport kvm_vcpu_cache and kvm_vcpu_{un}init() Sean Christopherson
2019-12-20  9:39   ` Cornelia Huck
2019-12-18 21:55 ` [PATCH v2 32/45] KVM: Move initialization of preempt notifier to kvm_vcpu_init() Sean Christopherson
2019-12-20  9:50   ` Cornelia Huck
2019-12-18 21:55 ` [PATCH v2 33/45] KVM: x86: Move guts of kvm_arch_vcpu_setup() into kvm_arch_vcpu_create() Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 34/45] KVM: MIPS: Move .vcpu_setup() call to kvm_arch_vcpu_create() Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 35/45] KVM: s390: Manually invoke vcpu setup during kvm_arch_vcpu_create() Sean Christopherson
2019-12-20 10:04   ` Cornelia Huck
2019-12-20 15:56     ` Sean Christopherson
2019-12-20 16:02       ` Cornelia Huck
2019-12-20 16:22         ` Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 36/45] KVM: PPC: BookE: Setup vcpu during kvmppc_core_vcpu_create() Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 37/45] KVM: Drop kvm_arch_vcpu_setup() Sean Christopherson
2019-12-20 10:06   ` Cornelia Huck
2019-12-18 21:55 ` Sean Christopherson [this message]
2019-12-18 21:55 ` [PATCH v2 39/45] KVM: MIPS: Move all vcpu init code into kvm_arch_vcpu_create() Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 40/45] KVM: ARM: " Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 41/45] KVM: PPC: " Sean Christopherson
2020-01-20  3:46   ` Paul Mackerras
2020-01-21 11:12     ` Paolo Bonzini
2019-12-18 21:55 ` [PATCH v2 42/45] KVM: arm64: Free sve_state via arm specific hook Sean Christopherson
2019-12-18 21:55 ` [PATCH v2 43/45] KVM: Drop kvm_arch_vcpu_init() and kvm_arch_vcpu_uninit() Sean Christopherson
2019-12-20 10:13   ` Cornelia Huck
2019-12-18 21:55 ` [PATCH v2 44/45] KVM: Move putting of vcpu->pid to kvm_vcpu_destroy() Sean Christopherson
2019-12-20 10:16   ` Cornelia Huck
2019-12-18 21:55 ` [PATCH v2 45/45] KVM: Move vcpu->run page allocation out of kvm_vcpu_init() Sean Christopherson
2019-12-20 10:30   ` Cornelia Huck
2020-01-18 20:01 ` [PATCH v2 00/45] KVM: Refactor vCPU creation Paolo Bonzini

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