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KVM: arm64: vgic: Add a non-locking primitive for kvm_vgic_vcpu_destroy()

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commit d26b9cb33c upstream.

As we are going to need to call into kvm_vgic_vcpu_destroy() without
prior holding of the slots_lock, introduce __kvm_vgic_vcpu_destroy()
as a non-locking primitive of kvm_vgic_vcpu_destroy().

Cc: stable@vger.kernel.org
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20231207151201.3028710-3-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Marc Zyngier 2023-12-07 15:11:58 +00:00 committed by Greg Kroah-Hartman
parent 71c631a9fb
commit 05d47e26c2
1 changed files with 11 additions and 2 deletions
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13
arch/arm64/kvm/vgic/vgic-init.c
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@ -368,7 +368,7 @@ static void kvm_vgic_dist_destroy(struct kvm *kvm)
vgic_v4_teardown(kvm);
}
void kvm_vgic_vcpu_destroy(struct kvm_vcpu *vcpu)
static void __kvm_vgic_vcpu_destroy(struct kvm_vcpu *vcpu)
{
struct vgic_cpu *vgic_cpu = &vcpu->arch.vgic_cpu;
@ -382,6 +382,15 @@ void kvm_vgic_vcpu_destroy(struct kvm_vcpu *vcpu)
vgic_cpu->rd_iodev.base_addr = VGIC_ADDR_UNDEF;
}
void kvm_vgic_vcpu_destroy(struct kvm_vcpu *vcpu)
{
struct kvm *kvm = vcpu->kvm;
mutex_lock(&kvm->slots_lock);
__kvm_vgic_vcpu_destroy(vcpu);
mutex_unlock(&kvm->slots_lock);
}
void kvm_vgic_destroy(struct kvm *kvm)
{
struct kvm_vcpu *vcpu;
@ -392,7 +401,7 @@ void kvm_vgic_destroy(struct kvm *kvm)
vgic_debug_destroy(kvm);
kvm_for_each_vcpu(i, vcpu, kvm)
kvm_vgic_vcpu_destroy(vcpu);
__kvm_vgic_vcpu_destroy(vcpu);
mutex_lock(&kvm->arch.config_lock);