[PATCH 02/12] KVM: arm64: Move GICv3 trap configuration to kvm_calculate_traps()

Marc Zyngier
2024-08-20T10:06:13Z

Follow the pattern introduced with vcpu_set_hcr(), and introduce
vcpu_set_ich_hcr(), which configures the GICv3 traps at the same
point.

This will allow future changes to introduce trap configuration on
a per-VM basis.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
arch/arm64/kvm/sys_regs.c | 1 +
arch/arm64/kvm/vgic/vgic-v3.c | 9 +++++++++
arch/arm64/kvm/vgic/vgic.h | 2 ++
3 files changed, 12 insertions(+)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 31e49da867ff..257c8da23a4e 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -4551,6 +4551,7 @@ void kvm_calculate_traps(struct kvm_vcpu *vcpu)

mutex_lock(&kvm->arch.config_lock);
vcpu_set_hcr(vcpu);
+ vcpu_set_ich_hcr(vcpu);

if (cpus_have_final_cap(ARM64_HAS_HCX)) {
/*
diff --git a/arch/arm64/kvm/vgic/vgic-v3.c b/arch/arm64/kvm/vgic/vgic-v3.c
index 3eecdd2f4b8f..11718412921f 100644
--- a/arch/arm64/kvm/vgic/vgic-v3.c
+++ b/arch/arm64/kvm/vgic/vgic-v3.c
@@ -292,6 +292,15 @@ void vgic_v3_enable(struct kvm_vcpu *vcpu)

/* Get the show on the road... */
vgic_v3->vgic_hcr = ICH_HCR_EN;
+}
+
+void vcpu_set_ich_hcr(struct kvm_vcpu *vcpu)
+{
+ struct vgic_v3_cpu_if *vgic_v3 = &vcpu->arch.vgic_cpu.vgic_v3;
+
+ if (!kvm_has_gicv3(vcpu->kvm))
+ return;
+
if (group0_trap)
vgic_v3->vgic_hcr |= ICH_HCR_TALL0;
if (group1_trap)
diff --git a/arch/arm64/kvm/vgic/vgic.h b/arch/arm64/kvm/vgic/vgic.h
index 8532bfe3fed4..c72c38b44234 100644
--- a/arch/arm64/kvm/vgic/vgic.h
+++ b/arch/arm64/kvm/vgic/vgic.h
@@ -346,6 +346,8 @@ void vgic_v4_configure_vsgis(struct kvm *kvm);
void vgic_v4_get_vlpi_state(struct vgic_irq *irq, bool *val);
int vgic_v4_request_vpe_irq(struct kvm_vcpu *vcpu, int irq);

+void vcpu_set_ich_hcr(struct kvm_vcpu *vcpu);
+
static inline bool kvm_has_gicv3(struct kvm *kvm)
{
return (static_branch_unlikely(&kvm_vgic_global_state.gicv3_cpuif) &&
--
2.39.2