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Diffstat (limited to 'arch/arm64/kvm/hyp/vgic-v2-sr.c')
-rw-r--r--arch/arm64/kvm/hyp/vgic-v2-sr.c84
1 files changed, 84 insertions, 0 deletions
diff --git a/arch/arm64/kvm/hyp/vgic-v2-sr.c b/arch/arm64/kvm/hyp/vgic-v2-sr.c
new file mode 100644
index 000000000000..e71761238cfc
--- /dev/null
+++ b/arch/arm64/kvm/hyp/vgic-v2-sr.c
@@ -0,0 +1,84 @@
+/*
+ * Copyright (C) 2012-2015 - ARM Ltd
+ * 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/compiler.h>
+#include <linux/irqchip/arm-gic.h>
+#include <linux/kvm_host.h>
+
+#include <asm/kvm_mmu.h>
+
+#include "hyp.h"
+
+/* vcpu is already in the HYP VA space */
+void __hyp_text __vgic_v2_save_state(struct kvm_vcpu *vcpu)
+{
+ struct kvm *kvm = kern_hyp_va(vcpu->kvm);
+ struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2;
+ struct vgic_dist *vgic = &kvm->arch.vgic;
+ void __iomem *base = kern_hyp_va(vgic->vctrl_base);
+ u32 eisr0, eisr1, elrsr0, elrsr1;
+ int i, nr_lr;
+
+ if (!base)
+ return;
+
+ nr_lr = vcpu->arch.vgic_cpu.nr_lr;
+ cpu_if->vgic_vmcr = readl_relaxed(base + GICH_VMCR);
+ cpu_if->vgic_misr = readl_relaxed(base + GICH_MISR);
+ eisr0 = readl_relaxed(base + GICH_EISR0);
+ elrsr0 = readl_relaxed(base + GICH_ELRSR0);
+ if (unlikely(nr_lr > 32)) {
+ eisr1 = readl_relaxed(base + GICH_EISR1);
+ elrsr1 = readl_relaxed(base + GICH_ELRSR1);
+ } else {
+ eisr1 = elrsr1 = 0;
+ }
+#ifdef CONFIG_CPU_BIG_ENDIAN
+ cpu_if->vgic_eisr = ((u64)eisr0 << 32) | eisr1;
+ cpu_if->vgic_elrsr = ((u64)elrsr0 << 32) | elrsr1;
+#else
+ cpu_if->vgic_eisr = ((u64)eisr1 << 32) | eisr0;
+ cpu_if->vgic_elrsr = ((u64)elrsr1 << 32) | elrsr0;
+#endif
+ cpu_if->vgic_apr = readl_relaxed(base + GICH_APR);
+
+ writel_relaxed(0, base + GICH_HCR);
+
+ for (i = 0; i < nr_lr; i++)
+ cpu_if->vgic_lr[i] = readl_relaxed(base + GICH_LR0 + (i * 4));
+}
+
+/* vcpu is already in the HYP VA space */
+void __hyp_text __vgic_v2_restore_state(struct kvm_vcpu *vcpu)
+{
+ struct kvm *kvm = kern_hyp_va(vcpu->kvm);
+ struct vgic_v2_cpu_if *cpu_if = &vcpu->arch.vgic_cpu.vgic_v2;
+ struct vgic_dist *vgic = &kvm->arch.vgic;
+ void __iomem *base = kern_hyp_va(vgic->vctrl_base);
+ int i, nr_lr;
+
+ if (!base)
+ return;
+
+ writel_relaxed(cpu_if->vgic_hcr, base + GICH_HCR);
+ writel_relaxed(cpu_if->vgic_vmcr, base + GICH_VMCR);
+ writel_relaxed(cpu_if->vgic_apr, base + GICH_APR);
+
+ nr_lr = vcpu->arch.vgic_cpu.nr_lr;
+ for (i = 0; i < nr_lr; i++)
+ writel_relaxed(cpu_if->vgic_lr[i], base + GICH_LR0 + (i * 4));
+}