From: Marcelo Tosatti <mtosatti@redhat.com>
To: kvm@vger.kernel.org
Cc: Paolo Bonzini <pbonzini@redhat.com>,
Alex Williamson <alex.williamson@redhat.com>,
Sean Christopherson <seanjc@google.com>,
Peter Xu <peterx@redhat.com>,
Marcelo Tosatti <mtosatti@redhat.com>
Subject: [patch 1/4] KVM: x86: add start_assignment hook to kvm_x86_ops
Date: Tue, 11 May 2021 20:57:39 -0300 [thread overview]
Message-ID: <20210512000101.895392564@redhat.com> (raw)
In-Reply-To: 20210511235738.333950860@redhat.com
Add a start_assignment hook to kvm_x86_ops, which is called when
kvm_arch_start_assignment is done.
The hook is required to update the wakeup vector of a sleeping vCPU
when a device is assigned to the guest.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Index: kvm/arch/x86/include/asm/kvm_host.h
===================================================================
--- kvm.orig/arch/x86/include/asm/kvm_host.h
+++ kvm/arch/x86/include/asm/kvm_host.h
@@ -1322,6 +1322,7 @@ struct kvm_x86_ops {
int (*update_pi_irte)(struct kvm *kvm, unsigned int host_irq,
uint32_t guest_irq, bool set);
+ void (*start_assignment)(struct kvm *kvm);
void (*apicv_post_state_restore)(struct kvm_vcpu *vcpu);
bool (*dy_apicv_has_pending_interrupt)(struct kvm_vcpu *vcpu);
Index: kvm/arch/x86/kvm/x86.c
===================================================================
--- kvm.orig/arch/x86/kvm/x86.c
+++ kvm/arch/x86/kvm/x86.c
@@ -11295,7 +11295,8 @@ bool kvm_arch_can_dequeue_async_page_pre
void kvm_arch_start_assignment(struct kvm *kvm)
{
- atomic_inc(&kvm->arch.assigned_device_count);
+ if (atomic_inc_return(&kvm->arch.assigned_device_count) == 1)
+ static_call_cond(kvm_x86_start_assignment)(kvm);
}
EXPORT_SYMBOL_GPL(kvm_arch_start_assignment);
Index: kvm/arch/x86/include/asm/kvm-x86-ops.h
===================================================================
--- kvm.orig/arch/x86/include/asm/kvm-x86-ops.h
+++ kvm/arch/x86/include/asm/kvm-x86-ops.h
@@ -99,6 +99,7 @@ KVM_X86_OP_NULL(post_block)
KVM_X86_OP_NULL(vcpu_blocking)
KVM_X86_OP_NULL(vcpu_unblocking)
KVM_X86_OP_NULL(update_pi_irte)
+KVM_X86_OP_NULL(start_assignment)
KVM_X86_OP_NULL(apicv_post_state_restore)
KVM_X86_OP_NULL(dy_apicv_has_pending_interrupt)
KVM_X86_OP_NULL(set_hv_timer)
next prev parent reply other threads:[~2021-05-12 0:01 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-11 23:57 [patch 0/4] VMX: configure posted interrupt descriptor when assigning device (v4) Marcelo Tosatti
2021-05-11 23:57 ` Marcelo Tosatti [this message]
2021-05-12 15:30 ` [patch 1/4] KVM: x86: add start_assignment hook to kvm_x86_ops Peter Xu
2021-05-11 23:57 ` [patch 2/4] KVM: add arch specific vcpu_check_block callback Marcelo Tosatti
2021-05-11 23:57 ` [patch 3/4] KVM: x86: implement kvm_arch_vcpu_check_block callback Marcelo Tosatti
2021-05-11 23:57 ` [patch 4/4] KVM: VMX: update vcpu posted-interrupt descriptor when assigning device Marcelo Tosatti
-- strict thread matches above, loose matches on Subject: below --
2021-05-10 17:26 [patch 0/4] VMX: configure posted interrupt descriptor when assigning device (v3) Marcelo Tosatti
2021-05-10 17:26 ` [patch 1/4] KVM: x86: add start_assignment hook to kvm_x86_ops Marcelo Tosatti
2021-05-11 16:26 ` Peter Xu
2021-05-11 17:29 ` Marcelo Tosatti
2021-05-07 13:06 [patch 0/4] VMX: configure posted interrupt descriptor when assigning device Marcelo Tosatti
2021-05-07 13:06 ` [patch 1/4] KVM: x86: add start_assignment hook to kvm_x86_ops Marcelo Tosatti
2021-05-07 19:16 ` Peter Xu
2021-05-10 17:53 ` Marcelo Tosatti
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