github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-05-27 00:22:00 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: arm64: GICv2: Always trap GICV_DIR register

Browse Source 
Since we can't decide to trap the DIR register on a per-vcpu basis,
always trap the second page of the GIC CPU interface. Yes, this is
costly. On the bright side, no sane SW should use EOImode==1 on
GICv2...

Tested-by: Fuad Tabba <tabba@google.com>
Signed-off-by: Marc Zyngier <maz@kernel.org>
Tested-by: Mark Brown <broonie@kernel.org>
Link: https://msgid.link/20251120172540.2267180-40-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>
This commit is contained in:
Marc Zyngier 2025-11-20 17:25:29 +00:00 committed by Oliver Upton
parent 255de897e7
commit 07bb1c5622
2 changed files with 5 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/arm64/kvm/hyp/vgic-v2-cpuif-proxy.c
View File

@ -63,6 +63,10 @@ int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu)
return -1;
}
/* Handle deactivation as a normal exit */
if ((fault_ipa - vgic->vgic_cpu_base) >= GIC_CPU_DEACTIVATE)
return 0;
rd = kvm_vcpu_dabt_get_rd(vcpu);
addr = kvm_vgic_global_state.vcpu_hyp_va;
addr += fault_ipa - vgic->vgic_cpu_base;

2
arch/arm64/kvm/vgic/vgic-v2.c
View File

@ -457,7 +457,7 @@ int vgic_v2_map_resources(struct kvm *kvm)
if (!static_branch_unlikely(&vgic_v2_cpuif_trap)) {
ret = kvm_phys_addr_ioremap(kvm, dist->vgic_cpu_base,
kvm_vgic_global_state.vcpu_base,
KVM_VGIC_V2_CPU_SIZE, true);
KVM_VGIC_V2_CPU_SIZE - SZ_4K, true);
if (ret) {
kvm_err("Unable to remap VGIC CPU to VCPU\n");
return ret;