From: Gleb Natapov <gleb@redhat.com>
To: Yang Zhang <yang.z.zhang@intel.com>
Cc: kvm@vger.kernel.org, mtosatti@redhat.com,
xiantao.zhang@intel.com, jun.nakajima@intel.com
Subject: Re: [PATCH v7 4/7] KVM: Call common update function when ioapic entry changed.
Date: Sun, 7 Apr 2013 16:33:38 +0300 [thread overview]
Message-ID: <20130407133338.GU17919@redhat.com> (raw)
In-Reply-To: <1364787155-3208-5-git-send-email-yang.z.zhang@intel.com>
On Mon, Apr 01, 2013 at 11:32:32AM +0800, Yang Zhang wrote:
> From: Yang Zhang <yang.z.zhang@Intel.com>
>
> Both TMR and EOI exit bitmap need to be updated when ioapic changed
> or vcpu's id/ldr/dfr changed. So use common function instead eoi exit
> bitmap specific function.
>
> Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
> ---
> arch/ia64/kvm/lapic.h | 6 ------
> arch/x86/kvm/lapic.c | 2 +-
> arch/x86/kvm/vmx.c | 3 +++
> arch/x86/kvm/x86.c | 11 +++++++----
> include/linux/kvm_host.h | 4 ++--
> virt/kvm/ioapic.c | 26 +++++++++++++++-----------
> virt/kvm/ioapic.h | 7 +++----
> virt/kvm/irq_comm.c | 4 ++--
> virt/kvm/kvm_main.c | 4 ++--
> 9 files changed, 35 insertions(+), 32 deletions(-)
>
> diff --git a/arch/ia64/kvm/lapic.h b/arch/ia64/kvm/lapic.h
> index c3e2935..c5f92a9 100644
> --- a/arch/ia64/kvm/lapic.h
> +++ b/arch/ia64/kvm/lapic.h
> @@ -27,10 +27,4 @@ int kvm_apic_set_irq(struct kvm_vcpu *vcpu, struct kvm_lapic_irq *irq);
> #define kvm_apic_present(x) (true)
> #define kvm_lapic_enabled(x) (true)
>
> -static inline bool kvm_apic_vid_enabled(void)
> -{
> - /* IA64 has no apicv supporting, do nothing here */
> - return false;
> -}
> -
> #endif
> diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
> index e227474..ce8d6f6 100644
> --- a/arch/x86/kvm/lapic.c
> +++ b/arch/x86/kvm/lapic.c
> @@ -209,7 +209,7 @@ out:
> if (old)
> kfree_rcu(old, rcu);
>
> - kvm_ioapic_make_eoibitmap_request(kvm);
> + kvm_vcpu_scan_ioapic(kvm);
> }
>
> static inline void kvm_apic_set_id(struct kvm_lapic *apic, u8 id)
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index b2e95bc..edfc87a 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -6420,6 +6420,9 @@ static void vmx_hwapic_irr_update(struct kvm_vcpu *vcpu, int max_irr)
>
> static void vmx_load_eoi_exitmap(struct kvm_vcpu *vcpu, u64 *eoi_exit_bitmap)
> {
> + if (!vmx_vm_has_apicv(vcpu->kvm))
> + return;
> +
> vmcs_write64(EOI_EXIT_BITMAP0, eoi_exit_bitmap[0]);
> vmcs_write64(EOI_EXIT_BITMAP1, eoi_exit_bitmap[1]);
> vmcs_write64(EOI_EXIT_BITMAP2, eoi_exit_bitmap[2]);
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 4d42fe1..64241b6 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -5647,13 +5647,16 @@ static void kvm_gen_update_masterclock(struct kvm *kvm)
> #endif
> }
>
> -static void update_eoi_exitmap(struct kvm_vcpu *vcpu)
> +static void vcpu_scan_ioapic(struct kvm_vcpu *vcpu)
> {
> u64 eoi_exit_bitmap[4];
>
> + if (!kvm_lapic_enabled(vcpu))
> + return;
> +
Why is this needed here?
> memset(eoi_exit_bitmap, 0, 32);
>
> - kvm_ioapic_calculate_eoi_exitmap(vcpu, eoi_exit_bitmap);
> + kvm_ioapic_scan_entry(vcpu, (unsigned long *)eoi_exit_bitmap);
> kvm_x86_ops->load_eoi_exitmap(vcpu, eoi_exit_bitmap);
> }
>
> @@ -5710,8 +5713,8 @@ static int vcpu_enter_guest(struct kvm_vcpu *vcpu)
> kvm_handle_pmu_event(vcpu);
> if (kvm_check_request(KVM_REQ_PMI, vcpu))
> kvm_deliver_pmi(vcpu);
> - if (kvm_check_request(KVM_REQ_EOIBITMAP, vcpu))
> - update_eoi_exitmap(vcpu);
> + if (kvm_check_request(KVM_REQ_SCAN_IOAPIC, vcpu))
> + vcpu_scan_ioapic(vcpu);
> }
>
> if (kvm_check_request(KVM_REQ_EVENT, vcpu) || req_int_win) {
> diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
> index 1c0be23..ef1b3e3 100644
> --- a/include/linux/kvm_host.h
> +++ b/include/linux/kvm_host.h
> @@ -126,7 +126,7 @@ static inline bool is_error_page(struct page *page)
> #define KVM_REQ_MASTERCLOCK_UPDATE 19
> #define KVM_REQ_MCLOCK_INPROGRESS 20
> #define KVM_REQ_EPR_EXIT 21
> -#define KVM_REQ_EOIBITMAP 22
> +#define KVM_REQ_SCAN_IOAPIC 22
>
> #define KVM_USERSPACE_IRQ_SOURCE_ID 0
> #define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1
> @@ -571,7 +571,7 @@ void kvm_put_guest_fpu(struct kvm_vcpu *vcpu);
> void kvm_flush_remote_tlbs(struct kvm *kvm);
> void kvm_reload_remote_mmus(struct kvm *kvm);
> void kvm_make_mclock_inprogress_request(struct kvm *kvm);
> -void kvm_make_update_eoibitmap_request(struct kvm *kvm);
> +void kvm_make_scan_ioapic_request(struct kvm *kvm);
>
> long kvm_arch_dev_ioctl(struct file *filp,
> unsigned int ioctl, unsigned long arg);
> diff --git a/virt/kvm/ioapic.c b/virt/kvm/ioapic.c
> index fbd0556..f37c889 100644
> --- a/virt/kvm/ioapic.c
> +++ b/virt/kvm/ioapic.c
> @@ -119,8 +119,8 @@ static void update_handled_vectors(struct kvm_ioapic *ioapic)
> smp_wmb();
> }
>
> -void kvm_ioapic_calculate_eoi_exitmap(struct kvm_vcpu *vcpu,
> - u64 *eoi_exit_bitmap)
> +void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
> + unsigned long *eoi_exit_bitmap)
> {
> struct kvm_ioapic *ioapic = vcpu->kvm->arch.vioapic;
> union kvm_ioapic_redirect_entry *e;
> @@ -128,7 +128,6 @@ void kvm_ioapic_calculate_eoi_exitmap(struct kvm_vcpu *vcpu,
> int index;
>
> spin_lock(&ioapic->lock);
> - /* traverse ioapic entry to set eoi exit bitmap*/
> for (index = 0; index < IOAPIC_NUM_PINS; index++) {
> e = &ioapic->redirtbl[index];
> if (!e->fields.mask &&
> @@ -137,22 +136,27 @@ void kvm_ioapic_calculate_eoi_exitmap(struct kvm_vcpu *vcpu,
> index))) {
> if (kvm_apic_match_dest(vcpu, NULL, 0,
> e->fields.dest_id, e->fields.dest_mode))
> - __set_bit(irqe.vector,
> - (unsigned long *)eoi_exit_bitmap);
> + __set_bit(irqe.vector, eoi_exit_bitmap);
I prefer the old way of casting as deep in the call chain as possible.
> }
> }
> spin_unlock(&ioapic->lock);
> }
> -EXPORT_SYMBOL_GPL(kvm_ioapic_calculate_eoi_exitmap);
>
> -void kvm_ioapic_make_eoibitmap_request(struct kvm *kvm)
> +#ifdef CONFIG_X86
> +void kvm_vcpu_scan_ioapic(struct kvm *kvm)
The name is too similar to vcpu_scan_ioapic and does not describe well
that the function does not actually scan anything, but only makes a
request. Call it kvm_vcpu_request_scan_ioapic();
> {
> struct kvm_ioapic *ioapic = kvm->arch.vioapic;
>
> - if (!kvm_apic_vid_enabled(kvm) || !ioapic)
> + if (!ioapic)
> return;
> - kvm_make_update_eoibitmap_request(kvm);
> + kvm_make_scan_ioapic_request(kvm);
> }
> +#else
> +void kvm_vcpu_scan_ioapic(struct kvm *kvm)
> +{
> + return;
> +}
> +#endif
>
> static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
> {
> @@ -195,7 +199,7 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
> if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG
> && ioapic->irr & (1 << index))
> ioapic_service(ioapic, index);
> - kvm_ioapic_make_eoibitmap_request(ioapic->kvm);
> + kvm_vcpu_scan_ioapic(ioapic->kvm);
> break;
> }
> }
> @@ -495,7 +499,7 @@ int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state)
> spin_lock(&ioapic->lock);
> memcpy(ioapic, state, sizeof(struct kvm_ioapic_state));
> update_handled_vectors(ioapic);
> - kvm_ioapic_make_eoibitmap_request(kvm);
> + kvm_vcpu_scan_ioapic(kvm);
> spin_unlock(&ioapic->lock);
> return 0;
> }
> diff --git a/virt/kvm/ioapic.h b/virt/kvm/ioapic.h
> index 0400a46..e3538ba 100644
> --- a/virt/kvm/ioapic.h
> +++ b/virt/kvm/ioapic.h
> @@ -82,9 +82,8 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
> struct kvm_lapic_irq *irq);
> int kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
> int kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
> -void kvm_ioapic_make_eoibitmap_request(struct kvm *kvm);
> -void kvm_ioapic_calculate_eoi_exitmap(struct kvm_vcpu *vcpu,
> - u64 *eoi_exit_bitmap);
> -
> +void kvm_vcpu_scan_ioapic(struct kvm *kvm);
> +void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
> + unsigned long *eoi_exit_bitmap);
>
> #endif
> diff --git a/virt/kvm/irq_comm.c b/virt/kvm/irq_comm.c
> index e9073cf..b5cc1e1 100644
> --- a/virt/kvm/irq_comm.c
> +++ b/virt/kvm/irq_comm.c
> @@ -280,7 +280,7 @@ void kvm_register_irq_ack_notifier(struct kvm *kvm,
> mutex_lock(&kvm->irq_lock);
> hlist_add_head_rcu(&kian->link, &kvm->irq_ack_notifier_list);
> mutex_unlock(&kvm->irq_lock);
> - kvm_ioapic_make_eoibitmap_request(kvm);
> + kvm_vcpu_scan_ioapic(kvm);
> }
>
> void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
> @@ -290,7 +290,7 @@ void kvm_unregister_irq_ack_notifier(struct kvm *kvm,
> hlist_del_init_rcu(&kian->link);
> mutex_unlock(&kvm->irq_lock);
> synchronize_rcu();
> - kvm_ioapic_make_eoibitmap_request(kvm);
> + kvm_vcpu_scan_ioapic(kvm);
> }
>
> int kvm_request_irq_source_id(struct kvm *kvm)
> diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
> index ff71541..2d44013 100644
> --- a/virt/kvm/kvm_main.c
> +++ b/virt/kvm/kvm_main.c
> @@ -217,9 +217,9 @@ void kvm_make_mclock_inprogress_request(struct kvm *kvm)
> make_all_cpus_request(kvm, KVM_REQ_MCLOCK_INPROGRESS);
> }
>
> -void kvm_make_update_eoibitmap_request(struct kvm *kvm)
> +void kvm_make_scan_ioapic_request(struct kvm *kvm)
> {
> - make_all_cpus_request(kvm, KVM_REQ_EOIBITMAP);
> + make_all_cpus_request(kvm, KVM_REQ_SCAN_IOAPIC);
> }
>
> int kvm_vcpu_init(struct kvm_vcpu *vcpu, struct kvm *kvm, unsigned id)
> --
> 1.7.1
--
Gleb.
next prev parent reply other threads:[~2013-04-07 13:33 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-04-01 3:32 [PATCH v7 0/7] KVM: VMX: Add Posted Interrupt supporting Yang Zhang
2013-04-01 3:32 ` [PATCH v7 1/7] KVM: VMX: Enable acknowledge interupt on vmexit Yang Zhang
2013-04-01 3:32 ` [PATCH v7 2/7] KVM: VMX: Register a new IPI for posted interrupt Yang Zhang
2013-04-01 3:32 ` [PATCH v7 3/7] KVM: VMX: Check the posted interrupt capability Yang Zhang
2013-04-07 14:14 ` Gleb Natapov
2013-04-08 2:57 ` Zhang, Yang Z
2013-04-01 3:32 ` [PATCH v7 4/7] KVM: Call common update function when ioapic entry changed Yang Zhang
2013-04-07 13:33 ` Gleb Natapov [this message]
2013-04-07 14:00 ` Zhang, Yang Z
2013-04-07 14:05 ` Gleb Natapov
2013-04-08 4:10 ` Zhang, Yang Z
2013-04-01 3:32 ` [PATCH v7 5/7] KVM: Set TMR when programming ioapic entry Yang Zhang
2013-04-07 14:10 ` Gleb Natapov
2013-04-01 3:32 ` [PATCH v7 6/7] KVM: VMX: Add the algorithm of deliver posted interrupt Yang Zhang
2013-04-07 14:55 ` Gleb Natapov
2013-04-08 5:38 ` Zhang, Yang Z
2013-04-01 3:32 ` [PATCH v7 7/7] KVM: VMX: Use posted interrupt to deliver virtual interrupt Yang Zhang
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