[RFC,1/3] Introduce kvm_vcpu_is_bsp() function.

Message ID	1242910606-29286-2-git-send-email-gleb@redhat.com (mailing list archive)
State	New, archived
Headers	show Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n4LCuvmn006258 for <patchwork-kvm@patchwork.kernel.org>; Thu, 21 May 2009 12:56:57 GMT From: Gleb Natapov <gleb@redhat.com> To: avi@redhat.com Cc: kvm@vger.kernel.org Subject: [PATCH RFC 1/3] Introduce kvm_vcpu_is_bsp() function. Date: Thu, 21 May 2009 15:56:44 +0300 Message-Id: <1242910606-29286-2-git-send-email-gleb@redhat.com> In-Reply-To: <1242910606-29286-1-git-send-email-gleb@redhat.com> References: <1242910606-29286-1-git-send-email-gleb@redhat.com> Sender: kvm-owner@vger.kernel.org Precedence: bulk

diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c index 80c57b0..8a5911c 100644 --- a/arch/ia64/kvm/kvm-ia64.c +++ b/arch/ia64/kvm/kvm-ia64.c @@ -1216,7 +1216,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) if (IS_ERR(vmm_vcpu)) return PTR_ERR(vmm_vcpu); - if (vcpu->vcpu_id == 0) { + if (kvm_vcpu_is_bsp(vcpu)) { vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; /*Set entry address for first run.*/ diff --git a/arch/ia64/kvm/vcpu.c b/arch/ia64/kvm/vcpu.c index a2c6c15..7e7391d 100644 --- a/arch/ia64/kvm/vcpu.c +++ b/arch/ia64/kvm/vcpu.c @@ -830,7 +830,7 @@ static void vcpu_set_itc(struct kvm_vcpu *vcpu, u64 val) kvm = (struct kvm *)KVM_VM_BASE; - if (vcpu->vcpu_id == 0) { + if (kvm_vcpu_is_bsp(vcpu)) { for (i = 0; i < kvm->arch.online_vcpus; i++) { v = (struct kvm_vcpu *)((char *)vcpu + sizeof(struct kvm_vcpu_data) * i); diff --git a/arch/x86/kvm/i8254.c b/arch/x86/kvm/i8254.c index 4d6f0d2..bcf755f 100644 --- a/arch/x86/kvm/i8254.c +++ b/arch/x86/kvm/i8254.c @@ -228,7 +228,7 @@ int pit_has_pending_timer(struct kvm_vcpu *vcpu) { struct kvm_pit *pit = vcpu->kvm->arch.vpit; - if (pit && vcpu->vcpu_id == 0 && pit->pit_state.irq_ack) + if (pit && kvm_vcpu_is_bsp(vcpu) && pit->pit_state.irq_ack) return atomic_read(&pit->pit_state.pit_timer.pending); return 0; } @@ -249,7 +249,7 @@ void __kvm_migrate_pit_timer(struct kvm_vcpu *vcpu) struct kvm_pit *pit = vcpu->kvm->arch.vpit; struct hrtimer *timer; - if (vcpu->vcpu_id != 0 || !pit) + if (!kvm_vcpu_is_bsp(vcpu) || !pit) return; timer = &pit->pit_state.pit_timer.timer; diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c index ae99d83..260d4fa 100644 --- a/arch/x86/kvm/lapic.c +++ b/arch/x86/kvm/lapic.c @@ -787,7 +787,8 @@ void kvm_lapic_set_base(struct kvm_vcpu *vcpu, u64 value) vcpu->arch.apic_base = value; return; } - if (apic->vcpu->vcpu_id) + + if (!kvm_vcpu_is_bsp(apic->vcpu)) value &= ~MSR_IA32_APICBASE_BSP; vcpu->arch.apic_base = value; @@ -844,7 +845,7 @@ void kvm_lapic_reset(struct kvm_vcpu *vcpu) } update_divide_count(apic); atomic_set(&apic->lapic_timer.pending, 0); - if (vcpu->vcpu_id == 0) + if (kvm_vcpu_is_bsp(vcpu)) vcpu->arch.apic_base |= MSR_IA32_APICBASE_BSP; apic_update_ppr(apic); @@ -985,7 +986,7 @@ int kvm_apic_accept_pic_intr(struct kvm_vcpu *vcpu) u32 lvt0 = apic_get_reg(vcpu->arch.apic, APIC_LVT0); int r = 0; - if (vcpu->vcpu_id == 0) { + if (kvm_vcpu_is_bsp(vcpu)) { if (!apic_hw_enabled(vcpu->arch.apic)) r = 1; if ((lvt0 & APIC_LVT_MASKED) == 0 && diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c index dd667dd..8eede3f 100644 --- a/arch/x86/kvm/svm.c +++ b/arch/x86/kvm/svm.c @@ -605,7 +605,7 @@ static int svm_vcpu_reset(struct kvm_vcpu *vcpu) init_vmcb(svm); - if (vcpu->vcpu_id != 0) { + if (!kvm_vcpu_is_bsp(vcpu)) { kvm_rip_write(vcpu, 0); svm->vmcb->save.cs.base = svm->vcpu.arch.sipi_vector << 12; svm->vmcb->save.cs.selector = svm->vcpu.arch.sipi_vector << 8; @@ -669,7 +669,7 @@ static struct kvm_vcpu *svm_create_vcpu(struct kvm *kvm, unsigned int id) fx_init(&svm->vcpu); svm->vcpu.fpu_active = 1; svm->vcpu.arch.apic_base = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; - if (svm->vcpu.vcpu_id == 0) + if (kvm_vcpu_is_bsp(&svm->vcpu)) svm->vcpu.arch.apic_base |= MSR_IA32_APICBASE_BSP; return &svm->vcpu; diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c index 25f1239..fda57e9 100644 --- a/arch/x86/kvm/vmx.c +++ b/arch/x86/kvm/vmx.c @@ -2325,7 +2325,7 @@ static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) vmx->vcpu.arch.regs[VCPU_REGS_RDX] = get_rdx_init_val(); kvm_set_cr8(&vmx->vcpu, 0); msr = 0xfee00000 | MSR_IA32_APICBASE_ENABLE; - if (vmx->vcpu.vcpu_id == 0) + if (kvm_vcpu_is_bsp(&vmx->vcpu)) msr |= MSR_IA32_APICBASE_BSP; kvm_set_apic_base(&vmx->vcpu, msr); @@ -2336,7 +2336,7 @@ static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) * GUEST_CS_BASE should really be 0xffff0000, but VT vm86 mode * insists on having GUEST_CS_BASE == GUEST_CS_SELECTOR << 4. Sigh. */ - if (vmx->vcpu.vcpu_id == 0) { + if (kvm_vcpu_is_bsp(&vmx->vcpu)) { vmcs_write16(GUEST_CS_SELECTOR, 0xf000); vmcs_writel(GUEST_CS_BASE, 0x000f0000); } else { @@ -2365,7 +2365,7 @@ static int vmx_vcpu_reset(struct kvm_vcpu *vcpu) vmcs_writel(GUEST_SYSENTER_EIP, 0); vmcs_writel(GUEST_RFLAGS, 0x02); - if (vmx->vcpu.vcpu_id == 0) + if (kvm_vcpu_is_bsp(&vmx->vcpu)) kvm_rip_write(vcpu, 0xfff0); else kvm_rip_write(vcpu, 0); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 98c2434..701d646 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -4272,7 +4272,7 @@ int kvm_arch_vcpu_ioctl_set_sregs(struct kvm_vcpu *vcpu, kvm_set_segment(vcpu, &sregs->ldt, VCPU_SREG_LDTR); /* Older userspace won't unhalt the vcpu on reset. */ - if (vcpu->vcpu_id == 0 && kvm_rip_read(vcpu) == 0xfff0 && + if (kvm_vcpu_is_bsp(vcpu) && kvm_rip_read(vcpu) == 0xfff0 && sregs->cs.selector == 0xf000 && sregs->cs.base == 0xffff0000 && !(vcpu->arch.cr0 & X86_CR0_PE)) vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; @@ -4543,7 +4543,7 @@ int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu) kvm = vcpu->kvm; vcpu->arch.mmu.root_hpa = INVALID_PAGE; - if (!irqchip_in_kernel(kvm) || vcpu->vcpu_id == 0) + if (!irqchip_in_kernel(kvm) || kvm_vcpu_is_bsp(vcpu)) vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE; else vcpu->arch.mp_state = KVM_MP_STATE_UNINITIALIZED; diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 3b6caf5..0902655 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -130,6 +130,7 @@ struct kvm { int nmemslots; struct kvm_memory_slot memslots[KVM_MEMORY_SLOTS + KVM_PRIVATE_MEM_SLOTS]; + struct kvm_vcpu *bsp_vcpu; struct kvm_vcpu *vcpus[KVM_MAX_VCPUS]; struct list_head vm_list; struct kvm_io_bus mmio_bus; @@ -532,4 +533,8 @@ static inline void kvm_free_irq_routing(struct kvm *kvm) {} int kvm_irqfd(struct kvm *kvm, int fd, int gsi, int flags); void kvm_irqfd_release(struct kvm *kvm); +static inline bool kvm_vcpu_is_bsp(struct kvm_vcpu *vcpu) +{ + return vcpu->kvm->bsp_vcpu == vcpu; +} #endif diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index b58837d..c1ce031 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -1737,6 +1737,8 @@ static int kvm_vm_ioctl_create_vcpu(struct kvm *kvm, int n) goto vcpu_destroy; } kvm->vcpus[n] = vcpu; + if (n == 0) + kvm->bsp_vcpu = vcpu; mutex_unlock(&kvm->lock); /* Now it's all set up, let userspace reach it */

[RFC,1/3] Introduce kvm_vcpu_is_bsp() function.

Commit Message

Patch