tjh.dev / kernel
Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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KVM: arm64: Use MI to detect groups being enabled/disabled

Add the maintenance interrupt to force an exit when the guest
enables/disables individual groups, so that we can resort the
ap_list accordingly.

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/20251120172540.2267180-27-maz@kernel.org
Signed-off-by: Oliver Upton <oupton@kernel.org>

authored by

Marc Zyngier and committed by
Oliver Upton a69e2d6f 33c1f60b

+10
+5
arch/arm64/kvm/vgic/vgic-v2.c
··· 39 39 cpuif->vgic_hcr |= GICH_HCR_LRENPIE; 40 40 if (irqs_outside_lrs(als)) 41 41 cpuif->vgic_hcr |= GICH_HCR_UIE; 42 + 43 + cpuif->vgic_hcr |= (cpuif->vgic_vmcr & GICH_VMCR_ENABLE_GRP0_MASK) ? 44 + GICH_HCR_VGrp0DIE : GICH_HCR_VGrp0EIE; 45 + cpuif->vgic_hcr |= (cpuif->vgic_vmcr & GICH_VMCR_ENABLE_GRP1_MASK) ? 46 + GICH_HCR_VGrp1DIE : GICH_HCR_VGrp1EIE; 42 47 } 43 48 44 49 static bool lr_signals_eoi_mi(u32 lr_val)
+5
arch/arm64/kvm/vgic/vgic-v3.c
··· 39 39 40 40 if (!als->nr_sgi) 41 41 cpuif->vgic_hcr |= ICH_HCR_EL2_vSGIEOICount; 42 + 43 + cpuif->vgic_hcr |= (cpuif->vgic_vmcr & ICH_VMCR_ENG0_MASK) ? 44 + ICH_HCR_EL2_VGrp0DIE : ICH_HCR_EL2_VGrp0EIE; 45 + cpuif->vgic_hcr |= (cpuif->vgic_vmcr & ICH_VMCR_ENG1_MASK) ? 46 + ICH_HCR_EL2_VGrp1DIE : ICH_HCR_EL2_VGrp1EIE; 42 47 } 43 48 44 49 static bool lr_signals_eoi_mi(u64 lr_val)