bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 06:44:00 -04:00
Code Issues Packages Projects Releases Wiki Activity

KVM: arm64: nv: Add Maintenance Interrupt emulation

Browse Source 
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>
This commit is contained in:
Marc Zyngier
2025-02-25 17:29:24 +00:00
committed by Oliver Upton
parent 4b1b97f0d7
commit 201c8d40dd
6 changed files with 95 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
include/kvm/arm_vgic.h
View File

@@ -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);