Commit a0941a64 authored by Sean Christopherson's avatar Sean Christopherson Committed by Paolo Bonzini
Browse files

KVM: x86: Use static_call() for .vcpu_deliver_sipi_vector() 



Define and use a static_call() for kvm_x86_ops.vcpu_deliver_sipi_vector(),
mostly so that the op is defined in kvm-x86-ops.h.  This will allow using
KVM_X86_OP in vendor code to wire up the implementation.  Any performance
gains eeked out by using static_call() is a happy bonus and not the
primary motiviation.

Signed-off-by: default avatarSean Christopherson <seanjc@google.com>
Message-Id: <20220128005208.4008533-6-seanjc@google.com>
Signed-off-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
parent ef2d488c

arch/x86/include/asm/kvm-x86-ops.h

+1 −0
Original line number Diff line number Diff line
@@ -122,6 +122,7 @@ KVM_X86_OP_NULL(enable_direct_tlbflush) 
KVM_X86_OP_NULL(migrate_timers)

KVM_X86_OP(msr_filter_changed)

KVM_X86_OP_NULL(complete_emulated_msr)

KVM_X86_OP(vcpu_deliver_sipi_vector)



#undef KVM_X86_OP

#undef KVM_X86_OP_NULL

arch/x86/kvm/lapic.c

+1 −1
Original line number Diff line number Diff line
@@ -2933,7 +2933,7 @@ int kvm_apic_accept_events(struct kvm_vcpu *vcpu) 
			/* evaluate pending_events before reading the vector */

			smp_rmb();

			sipi_vector = apic->sipi_vector;

			kvm_x86_ops.vcpu_deliver_sipi_vector(vcpu, sipi_vector);

			static_call(kvm_x86_vcpu_deliver_sipi_vector)(vcpu, sipi_vector);

			vcpu->arch.mp_state = KVM_MP_STATE_RUNNABLE;

		}

	}