From 909777324588b40d431e6e3af0911ee62e0d00e3 Mon Sep 17 00:00:00 2001 From: Eric Auger Date: Tue, 1 Dec 2015 15:02:35 +0100 Subject: KVM: arm/arm64: vgic-new: vgic_init: implement kvm_vgic_hyp_init Implements kvm_vgic_hyp_init and vgic_probe function. This uses the new firmware independent VGIC probing to support both ACPI and DT based systems (code from Marc Zyngier). The vgic_global struct is enriched with new fields populated by those functions. Signed-off-by: Eric Auger Signed-off-by: Andre Przywara Reviewed-by: Christoffer Dall --- virt/kvm/arm/vgic/vgic-v3.c | 49 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) (limited to 'virt/kvm/arm/vgic/vgic-v3.c') diff --git a/virt/kvm/arm/vgic/vgic-v3.c b/virt/kvm/arm/vgic/vgic-v3.c index 8548297c6f76..de0e8e0b2625 100644 --- a/virt/kvm/arm/vgic/vgic-v3.c +++ b/virt/kvm/arm/vgic/vgic-v3.c @@ -15,6 +15,9 @@ #include #include #include +#include +#include +#include #include "vgic.h" @@ -182,3 +185,49 @@ void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcrp) vmcrp->bpr = (vmcr & ICH_VMCR_BPR0_MASK) >> ICH_VMCR_BPR0_SHIFT; vmcrp->pmr = (vmcr & ICH_VMCR_PMR_MASK) >> ICH_VMCR_PMR_SHIFT; } + +/** + * vgic_v3_probe - probe for a GICv3 compatible interrupt controller in DT + * @node: pointer to the DT node + * + * Returns 0 if a GICv3 has been found, returns an error code otherwise + */ +int vgic_v3_probe(const struct gic_kvm_info *info) +{ + u32 ich_vtr_el2 = kvm_call_hyp(__vgic_v3_get_ich_vtr_el2); + + /* + * The ListRegs field is 5 bits, but there is a architectural + * maximum of 16 list registers. Just ignore bit 4... + */ + kvm_vgic_global_state.nr_lr = (ich_vtr_el2 & 0xf) + 1; + kvm_vgic_global_state.can_emulate_gicv2 = false; + + if (!info->vcpu.start) { + kvm_info("GICv3: no GICV resource entry\n"); + kvm_vgic_global_state.vcpu_base = 0; + } else if (!PAGE_ALIGNED(info->vcpu.start)) { + pr_warn("GICV physical address 0x%llx not page aligned\n", + (unsigned long long)info->vcpu.start); + kvm_vgic_global_state.vcpu_base = 0; + } else if (!PAGE_ALIGNED(resource_size(&info->vcpu))) { + pr_warn("GICV size 0x%llx not a multiple of page size 0x%lx\n", + (unsigned long long)resource_size(&info->vcpu), + PAGE_SIZE); + kvm_vgic_global_state.vcpu_base = 0; + } else { + kvm_vgic_global_state.vcpu_base = info->vcpu.start; + kvm_vgic_global_state.can_emulate_gicv2 = true; + kvm_register_vgic_device(KVM_DEV_TYPE_ARM_VGIC_V2); + kvm_info("vgic-v2@%llx\n", info->vcpu.start); + } + if (kvm_vgic_global_state.vcpu_base == 0) + kvm_info("disabling GICv2 emulation\n"); + kvm_register_vgic_device(KVM_DEV_TYPE_ARM_VGIC_V3); + + kvm_vgic_global_state.vctrl_base = NULL; + kvm_vgic_global_state.type = VGIC_V3; + kvm_vgic_global_state.max_gic_vcpus = VGIC_V3_MAX_CPUS; + + return 0; +} -- cgit v1.2.3