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| author | Marc Zyngier <maz@kernel.org> | 2025-02-25 17:29:24 +0000 |
|---|---|---|
| committer | Oliver Upton <oliver.upton@linux.dev> | 2025-03-03 14:57:10 -0800 |
| commit | 201c8d40dde900719e9dc1548698e18195f46443 (patch) | |
| tree | 6fe6c67ad4932ee87f998049331c0f7a7cc4bc11 /include/kvm | |
| parent | KVM: arm64: nv: Handle L2->L1 transition on interrupt injection (diff) | |
| download | linux-201c8d40dde900719e9dc1548698e18195f46443.tar.gz linux-201c8d40dde900719e9dc1548698e18195f46443.zip | |
KVM: arm64: nv: Add Maintenance Interrupt emulation
Emulating the vGIC means emulating the dreaded Maintenance Interrupt.
This is a two-pronged problem:
- while running L2, getting an MI translates into an MI injected
in the L1 based on the state of the HW.
- while running L1, we must accurately reflect the state of the
MI line, based on the in-memory state.
The MI INTID is added to the distributor, as expected on any
virtualisation-capable implementation, and further patches
will allow its configuration.
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250225172930.1850838-11-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
Diffstat (limited to 'include/kvm')
| -rw-r--r-- | include/kvm/arm_vgic.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h index 1b373cb870fe..714cef854c1c 100644 --- a/include/kvm/arm_vgic.h +++ b/include/kvm/arm_vgic.h @@ -249,6 +249,9 @@ struct vgic_dist { int nr_spis; + /* The GIC maintenance IRQ for nested hypervisors. */ + u32 mi_intid; + /* base addresses in guest physical address space: */ gpa_t vgic_dist_base; /* distributor */ union { @@ -369,6 +372,7 @@ extern struct static_key_false vgic_v3_cpuif_trap; int kvm_set_legacy_vgic_v2_addr(struct kvm *kvm, struct kvm_arm_device_addr *dev_addr); void kvm_vgic_early_init(struct kvm *kvm); int kvm_vgic_vcpu_init(struct kvm_vcpu *vcpu); +int kvm_vgic_vcpu_nv_init(struct kvm_vcpu *vcpu); int kvm_vgic_create(struct kvm *kvm, u32 type); void kvm_vgic_destroy(struct kvm *kvm); void kvm_vgic_vcpu_destroy(struct kvm_vcpu *vcpu); |