projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| c0c2cdbf MZ |
1 | /* |
| 2 | * Copyright (C) 2012-2015 - ARM Ltd | |
| 3 | * Author: Marc Zyngier <marc.zyngier@arm.com> | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License version 2 as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License | |
| 15 | * along with this program. If not, see <http://www.gnu.org/licenses/>. | |
| 16 | */ | |
| 17 | ||
| 18 | #include <linux/compiler.h> | |
| 19 | #include <linux/irqchip/arm-gic.h> | |
| 20 | #include <linux/kvm_host.h> | |
| 21 | ||
| f1c9cad7 | 22 | #include <asm/kvm_hyp.h> |
| c0c2cdbf MZ |
23 | |
| 24 | /* vcpu is already in the HYP VA space */ | |
| 25 | void __hyp_text __vgic_v2_save_state(struct kvm_vcpu *vcpu) | |
| 26 | { | |
| 27 | struct kvm *kvm = kern_hyp_va(vcpu->kvm); | |
| 28 | struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2; | |
| 29 | struct vgic_dist *vgic = &kvm->arch.vgic; | |
| 30 | void __iomem *base = kern_hyp_va(vgic->vctrl_base); | |
| 31 | u32 eisr0, eisr1, elrsr0, elrsr1; | |
| 32 | int i, nr_lr; | |
| 33 | ||
| 34 | if (!base) | |
| 35 | return; | |
| 36 | ||
| 37 | nr_lr = vcpu->arch.vgic_cpu.nr_lr; | |
| 38 | cpu_if->vgic_vmcr = readl_relaxed(base + GICH_VMCR); | |
| 39 | cpu_if->vgic_misr = readl_relaxed(base + GICH_MISR); | |
| 40 | eisr0 = readl_relaxed(base + GICH_EISR0); | |
| 41 | elrsr0 = readl_relaxed(base + GICH_ELRSR0); | |
| 42 | if (unlikely(nr_lr > 32)) { | |
| 43 | eisr1 = readl_relaxed(base + GICH_EISR1); | |
| 44 | elrsr1 = readl_relaxed(base + GICH_ELRSR1); | |
| 45 | } else { | |
| 46 | eisr1 = elrsr1 = 0; | |
| 47 | } | |
| 48 | #ifdef CONFIG_CPU_BIG_ENDIAN | |
| 49 | cpu_if->vgic_eisr = ((u64)eisr0 << 32) | eisr1; | |
| 50 | cpu_if->vgic_elrsr = ((u64)elrsr0 << 32) | elrsr1; | |
| 51 | #else | |
| 52 | cpu_if->vgic_eisr = ((u64)eisr1 << 32) | eisr0; | |
| 53 | cpu_if->vgic_elrsr = ((u64)elrsr1 << 32) | elrsr0; | |
| 54 | #endif | |
| 55 | cpu_if->vgic_apr = readl_relaxed(base + GICH_APR); | |
| 56 | ||
| 57 | writel_relaxed(0, base + GICH_HCR); | |
| 58 | ||
| 59 | for (i = 0; i < nr_lr; i++) | |
| 60 | cpu_if->vgic_lr[i] = readl_relaxed(base + GICH_LR0 + (i * 4)); | |
| 61 | } | |
| 62 | ||
| 63 | /* vcpu is already in the HYP VA space */ | |
| 64 | void __hyp_text __vgic_v2_restore_state(struct kvm_vcpu *vcpu) | |
| 65 | { | |
| 66 | struct kvm *kvm = kern_hyp_va(vcpu->kvm); | |
| 67 | struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2; | |
| 68 | struct vgic_dist *vgic = &kvm->arch.vgic; | |
| 69 | void __iomem *base = kern_hyp_va(vgic->vctrl_base); | |
| 70 | int i, nr_lr; | |
| 71 | ||
| 72 | if (!base) | |
| 73 | return; | |
| 74 | ||
| 75 | writel_relaxed(cpu_if->vgic_hcr, base + GICH_HCR); | |
| 76 | writel_relaxed(cpu_if->vgic_vmcr, base + GICH_VMCR); | |
| 77 | writel_relaxed(cpu_if->vgic_apr, base + GICH_APR); | |
| 78 | ||
| 79 | nr_lr = vcpu->arch.vgic_cpu.nr_lr; | |
| 80 | for (i = 0; i < nr_lr; i++) | |
| 81 | writel_relaxed(cpu_if->vgic_lr[i], base + GICH_LR0 + (i * 4)); | |
| 82 | } |