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Diffstat (limited to 'virt/kvm/arm/vgic-v3.c')
-rw-r--r--virt/kvm/arm/vgic-v3.c279
1 files changed, 0 insertions, 279 deletions
diff --git a/virt/kvm/arm/vgic-v3.c b/virt/kvm/arm/vgic-v3.c
deleted file mode 100644
index 75b02fa86..000000000
--- a/virt/kvm/arm/vgic-v3.c
+++ /dev/null
@@ -1,279 +0,0 @@
-/*
- * Copyright (C) 2013 ARM Limited, All Rights Reserved.
- * Author: Marc Zyngier <marc.zyngier@arm.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
- */
-
-#include <linux/cpu.h>
-#include <linux/kvm.h>
-#include <linux/kvm_host.h>
-#include <linux/interrupt.h>
-#include <linux/io.h>
-
-#include <linux/irqchip/arm-gic-v3.h>
-#include <linux/irqchip/arm-gic-common.h>
-
-#include <asm/kvm_emulate.h>
-#include <asm/kvm_arm.h>
-#include <asm/kvm_asm.h>
-#include <asm/kvm_mmu.h>
-
-static u32 ich_vtr_el2;
-
-static struct vgic_lr vgic_v3_get_lr(const struct kvm_vcpu *vcpu, int lr)
-{
- struct vgic_lr lr_desc;
- u64 val = vcpu->arch.vgic_cpu.vgic_v3.vgic_lr[lr];
-
- if (vcpu->kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3)
- lr_desc.irq = val & ICH_LR_VIRTUAL_ID_MASK;
- else
- lr_desc.irq = val & GICH_LR_VIRTUALID;
-
- lr_desc.source = 0;
- if (lr_desc.irq <= 15 &&
- vcpu->kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V2)
- lr_desc.source = (val >> GICH_LR_PHYSID_CPUID_SHIFT) & 0x7;
-
- lr_desc.state = 0;
-
- if (val & ICH_LR_PENDING_BIT)
- lr_desc.state |= LR_STATE_PENDING;
- if (val & ICH_LR_ACTIVE_BIT)
- lr_desc.state |= LR_STATE_ACTIVE;
- if (val & ICH_LR_EOI)
- lr_desc.state |= LR_EOI_INT;
- if (val & ICH_LR_HW) {
- lr_desc.state |= LR_HW;
- lr_desc.hwirq = (val >> ICH_LR_PHYS_ID_SHIFT) & GENMASK(9, 0);
- }
-
- return lr_desc;
-}
-
-static void vgic_v3_set_lr(struct kvm_vcpu *vcpu, int lr,
- struct vgic_lr lr_desc)
-{
- u64 lr_val;
-
- lr_val = lr_desc.irq;
-
- /*
- * Currently all guest IRQs are Group1, as Group0 would result
- * in a FIQ in the guest, which it wouldn't expect.
- * Eventually we want to make this configurable, so we may revisit
- * this in the future.
- */
- switch (vcpu->kvm->arch.vgic.vgic_model) {
- case KVM_DEV_TYPE_ARM_VGIC_V3:
- lr_val |= ICH_LR_GROUP;
- break;
- case KVM_DEV_TYPE_ARM_VGIC_V2:
- if (lr_desc.irq < VGIC_NR_SGIS)
- lr_val |= (u32)lr_desc.source << GICH_LR_PHYSID_CPUID_SHIFT;
- break;
- default:
- BUG();
- }
-
- if (lr_desc.state & LR_STATE_PENDING)
- lr_val |= ICH_LR_PENDING_BIT;
- if (lr_desc.state & LR_STATE_ACTIVE)
- lr_val |= ICH_LR_ACTIVE_BIT;
- if (lr_desc.state & LR_EOI_INT)
- lr_val |= ICH_LR_EOI;
- if (lr_desc.state & LR_HW) {
- lr_val |= ICH_LR_HW;
- lr_val |= ((u64)lr_desc.hwirq) << ICH_LR_PHYS_ID_SHIFT;
- }
-
- vcpu->arch.vgic_cpu.vgic_v3.vgic_lr[lr] = lr_val;
-
- if (!(lr_desc.state & LR_STATE_MASK))
- vcpu->arch.vgic_cpu.vgic_v3.vgic_elrsr |= (1U << lr);
- else
- vcpu->arch.vgic_cpu.vgic_v3.vgic_elrsr &= ~(1U << lr);
-}
-
-static u64 vgic_v3_get_elrsr(const struct kvm_vcpu *vcpu)
-{
- return vcpu->arch.vgic_cpu.vgic_v3.vgic_elrsr;
-}
-
-static u64 vgic_v3_get_eisr(const struct kvm_vcpu *vcpu)
-{
- return vcpu->arch.vgic_cpu.vgic_v3.vgic_eisr;
-}
-
-static void vgic_v3_clear_eisr(struct kvm_vcpu *vcpu)
-{
- vcpu->arch.vgic_cpu.vgic_v3.vgic_eisr = 0;
-}
-
-static u32 vgic_v3_get_interrupt_status(const struct kvm_vcpu *vcpu)
-{
- u32 misr = vcpu->arch.vgic_cpu.vgic_v3.vgic_misr;
- u32 ret = 0;
-
- if (misr & ICH_MISR_EOI)
- ret |= INT_STATUS_EOI;
- if (misr & ICH_MISR_U)
- ret |= INT_STATUS_UNDERFLOW;
-
- return ret;
-}
-
-static void vgic_v3_get_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcrp)
-{
- u32 vmcr = vcpu->arch.vgic_cpu.vgic_v3.vgic_vmcr;
-
- vmcrp->ctlr = (vmcr & ICH_VMCR_CTLR_MASK) >> ICH_VMCR_CTLR_SHIFT;
- vmcrp->abpr = (vmcr & ICH_VMCR_BPR1_MASK) >> ICH_VMCR_BPR1_SHIFT;
- vmcrp->bpr = (vmcr & ICH_VMCR_BPR0_MASK) >> ICH_VMCR_BPR0_SHIFT;
- vmcrp->pmr = (vmcr & ICH_VMCR_PMR_MASK) >> ICH_VMCR_PMR_SHIFT;
-}
-
-static void vgic_v3_enable_underflow(struct kvm_vcpu *vcpu)
-{
- vcpu->arch.vgic_cpu.vgic_v3.vgic_hcr |= ICH_HCR_UIE;
-}
-
-static void vgic_v3_disable_underflow(struct kvm_vcpu *vcpu)
-{
- vcpu->arch.vgic_cpu.vgic_v3.vgic_hcr &= ~ICH_HCR_UIE;
-}
-
-static void vgic_v3_set_vmcr(struct kvm_vcpu *vcpu, struct vgic_vmcr *vmcrp)
-{
- u32 vmcr;
-
- vmcr = (vmcrp->ctlr << ICH_VMCR_CTLR_SHIFT) & ICH_VMCR_CTLR_MASK;
- vmcr |= (vmcrp->abpr << ICH_VMCR_BPR1_SHIFT) & ICH_VMCR_BPR1_MASK;
- vmcr |= (vmcrp->bpr << ICH_VMCR_BPR0_SHIFT) & ICH_VMCR_BPR0_MASK;
- vmcr |= (vmcrp->pmr << ICH_VMCR_PMR_SHIFT) & ICH_VMCR_PMR_MASK;
-
- vcpu->arch.vgic_cpu.vgic_v3.vgic_vmcr = vmcr;
-}
-
-static void vgic_v3_enable(struct kvm_vcpu *vcpu)
-{
- struct vgic_v3_cpu_if *vgic_v3 = &vcpu->arch.vgic_cpu.vgic_v3;
-
- /*
- * By forcing VMCR to zero, the GIC will restore the binary
- * points to their reset values. Anything else resets to zero
- * anyway.
- */
- vgic_v3->vgic_vmcr = 0;
- vgic_v3->vgic_elrsr = ~0;
-
- /*
- * If we are emulating a GICv3, we do it in an non-GICv2-compatible
- * way, so we force SRE to 1 to demonstrate this to the guest.
- * This goes with the spec allowing the value to be RAO/WI.
- */
- if (vcpu->kvm->arch.vgic.vgic_model == KVM_DEV_TYPE_ARM_VGIC_V3)
- vgic_v3->vgic_sre = ICC_SRE_EL1_SRE;
- else
- vgic_v3->vgic_sre = 0;
-
- /* Get the show on the road... */
- vgic_v3->vgic_hcr = ICH_HCR_EN;
-}
-
-static const struct vgic_ops vgic_v3_ops = {
- .get_lr = vgic_v3_get_lr,
- .set_lr = vgic_v3_set_lr,
- .get_elrsr = vgic_v3_get_elrsr,
- .get_eisr = vgic_v3_get_eisr,
- .clear_eisr = vgic_v3_clear_eisr,
- .get_interrupt_status = vgic_v3_get_interrupt_status,
- .enable_underflow = vgic_v3_enable_underflow,
- .disable_underflow = vgic_v3_disable_underflow,
- .get_vmcr = vgic_v3_get_vmcr,
- .set_vmcr = vgic_v3_set_vmcr,
- .enable = vgic_v3_enable,
-};
-
-static struct vgic_params vgic_v3_params;
-
-static void vgic_cpu_init_lrs(void *params)
-{
- kvm_call_hyp(__vgic_v3_init_lrs);
-}
-
-/**
- * vgic_v3_probe - probe for a GICv3 compatible interrupt controller
- * @gic_kvm_info: pointer to the GIC description
- * @ops: address of a pointer to the GICv3 operations
- * @params: address of a pointer to HW-specific parameters
- *
- * Returns 0 if a GICv3 has been found, with the low level operations
- * in *ops and the HW parameters in *params. Returns an error code
- * otherwise.
- */
-int vgic_v3_probe(const struct gic_kvm_info *gic_kvm_info,
- const struct vgic_ops **ops,
- const struct vgic_params **params)
-{
- int ret = 0;
- struct vgic_params *vgic = &vgic_v3_params;
- const struct resource *vcpu_res = &gic_kvm_info->vcpu;
-
- vgic->maint_irq = gic_kvm_info->maint_irq;
-
- 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...
- */
- vgic->nr_lr = (ich_vtr_el2 & 0xf) + 1;
- vgic->can_emulate_gicv2 = false;
-
- if (!vcpu_res->start) {
- kvm_info("GICv3: no GICV resource entry\n");
- vgic->vcpu_base = 0;
- } else if (!PAGE_ALIGNED(vcpu_res->start)) {
- pr_warn("GICV physical address 0x%llx not page aligned\n",
- (unsigned long long)vcpu_res->start);
- vgic->vcpu_base = 0;
- } else if (!PAGE_ALIGNED(resource_size(vcpu_res))) {
- pr_warn("GICV size 0x%llx not a multiple of page size 0x%lx\n",
- (unsigned long long)resource_size(vcpu_res),
- PAGE_SIZE);
- } else {
- vgic->vcpu_base = vcpu_res->start;
- vgic->can_emulate_gicv2 = true;
- kvm_register_device_ops(&kvm_arm_vgic_v2_ops,
- KVM_DEV_TYPE_ARM_VGIC_V2);
- }
- if (vgic->vcpu_base == 0)
- kvm_info("disabling GICv2 emulation\n");
- kvm_register_device_ops(&kvm_arm_vgic_v3_ops, KVM_DEV_TYPE_ARM_VGIC_V3);
-
- vgic->vctrl_base = NULL;
- vgic->type = VGIC_V3;
- vgic->max_gic_vcpus = VGIC_V3_MAX_CPUS;
-
- kvm_info("GICV base=0x%llx, IRQ=%d\n",
- vgic->vcpu_base, vgic->maint_irq);
-
- on_each_cpu(vgic_cpu_init_lrs, vgic, 1);
-
- *ops = &vgic_v3_ops;
- *params = vgic;
-
- return ret;
-}
generated by cgit v1.2.3 (git 2.25.1) at 2024-05-06 02:26:54 +0000