summaryrefslogtreecommitdiffstats
path: root/kernel/arch/arm64/include/asm/kvm_host.h
diff options
context:
space:
mode:
Diffstat (limited to 'kernel/arch/arm64/include/asm/kvm_host.h')
-rw-r--r--kernel/arch/arm64/include/asm/kvm_host.h253
1 files changed, 253 insertions, 0 deletions
diff --git a/kernel/arch/arm64/include/asm/kvm_host.h b/kernel/arch/arm64/include/asm/kvm_host.h
new file mode 100644
index 000000000..f0f58c9be
--- /dev/null
+++ b/kernel/arch/arm64/include/asm/kvm_host.h
@@ -0,0 +1,253 @@
+/*
+ * Copyright (C) 2012,2013 - ARM Ltd
+ * Author: Marc Zyngier <marc.zyngier@arm.com>
+ *
+ * Derived from arch/arm/include/asm/kvm_host.h:
+ * Copyright (C) 2012 - Virtual Open Systems and Columbia University
+ * Author: Christoffer Dall <c.dall@virtualopensystems.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/>.
+ */
+
+#ifndef __ARM64_KVM_HOST_H__
+#define __ARM64_KVM_HOST_H__
+
+#include <linux/types.h>
+#include <linux/kvm_types.h>
+#include <asm/kvm.h>
+#include <asm/kvm_asm.h>
+#include <asm/kvm_mmio.h>
+
+#define __KVM_HAVE_ARCH_INTC_INITIALIZED
+
+#if defined(CONFIG_KVM_ARM_MAX_VCPUS)
+#define KVM_MAX_VCPUS CONFIG_KVM_ARM_MAX_VCPUS
+#else
+#define KVM_MAX_VCPUS 0
+#endif
+
+#define KVM_USER_MEM_SLOTS 32
+#define KVM_PRIVATE_MEM_SLOTS 4
+#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
+
+#include <kvm/arm_vgic.h>
+#include <kvm/arm_arch_timer.h>
+
+#define KVM_VCPU_MAX_FEATURES 3
+
+int __attribute_const__ kvm_target_cpu(void);
+int kvm_reset_vcpu(struct kvm_vcpu *vcpu);
+int kvm_arch_dev_ioctl_check_extension(long ext);
+
+struct kvm_arch {
+ /* The VMID generation used for the virt. memory system */
+ u64 vmid_gen;
+ u32 vmid;
+
+ /* 1-level 2nd stage table and lock */
+ spinlock_t pgd_lock;
+ pgd_t *pgd;
+
+ /* VTTBR value associated with above pgd and vmid */
+ u64 vttbr;
+
+ /* The maximum number of vCPUs depends on the used GIC model */
+ int max_vcpus;
+
+ /* Interrupt controller */
+ struct vgic_dist vgic;
+
+ /* Timer */
+ struct arch_timer_kvm timer;
+};
+
+#define KVM_NR_MEM_OBJS 40
+
+/*
+ * We don't want allocation failures within the mmu code, so we preallocate
+ * enough memory for a single page fault in a cache.
+ */
+struct kvm_mmu_memory_cache {
+ int nobjs;
+ void *objects[KVM_NR_MEM_OBJS];
+};
+
+struct kvm_vcpu_fault_info {
+ u32 esr_el2; /* Hyp Syndrom Register */
+ u64 far_el2; /* Hyp Fault Address Register */
+ u64 hpfar_el2; /* Hyp IPA Fault Address Register */
+};
+
+struct kvm_cpu_context {
+ struct kvm_regs gp_regs;
+ union {
+ u64 sys_regs[NR_SYS_REGS];
+ u32 copro[NR_COPRO_REGS];
+ };
+};
+
+typedef struct kvm_cpu_context kvm_cpu_context_t;
+
+struct kvm_vcpu_arch {
+ struct kvm_cpu_context ctxt;
+
+ /* HYP configuration */
+ u64 hcr_el2;
+
+ /* Exception Information */
+ struct kvm_vcpu_fault_info fault;
+
+ /* Debug state */
+ u64 debug_flags;
+
+ /* Pointer to host CPU context */
+ kvm_cpu_context_t *host_cpu_context;
+
+ /* VGIC state */
+ struct vgic_cpu vgic_cpu;
+ struct arch_timer_cpu timer_cpu;
+
+ /*
+ * Anything that is not used directly from assembly code goes
+ * here.
+ */
+
+ /* Don't run the guest */
+ bool pause;
+
+ /* IO related fields */
+ struct kvm_decode mmio_decode;
+
+ /* Interrupt related fields */
+ u64 irq_lines; /* IRQ and FIQ levels */
+
+ /* Cache some mmu pages needed inside spinlock regions */
+ struct kvm_mmu_memory_cache mmu_page_cache;
+
+ /* Target CPU and feature flags */
+ int target;
+ DECLARE_BITMAP(features, KVM_VCPU_MAX_FEATURES);
+
+ /* Detect first run of a vcpu */
+ bool has_run_once;
+};
+
+#define vcpu_gp_regs(v) (&(v)->arch.ctxt.gp_regs)
+#define vcpu_sys_reg(v,r) ((v)->arch.ctxt.sys_regs[(r)])
+/*
+ * CP14 and CP15 live in the same array, as they are backed by the
+ * same system registers.
+ */
+#define vcpu_cp14(v,r) ((v)->arch.ctxt.copro[(r)])
+#define vcpu_cp15(v,r) ((v)->arch.ctxt.copro[(r)])
+
+#ifdef CONFIG_CPU_BIG_ENDIAN
+#define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r))
+#define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r) + 1)
+#else
+#define vcpu_cp15_64_high(v,r) vcpu_cp15((v),(r) + 1)
+#define vcpu_cp15_64_low(v,r) vcpu_cp15((v),(r))
+#endif
+
+struct kvm_vm_stat {
+ u32 remote_tlb_flush;
+};
+
+struct kvm_vcpu_stat {
+ u32 halt_successful_poll;
+ u32 halt_wakeup;
+};
+
+int kvm_vcpu_preferred_target(struct kvm_vcpu_init *init);
+unsigned long kvm_arm_num_regs(struct kvm_vcpu *vcpu);
+int kvm_arm_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices);
+int kvm_arm_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
+int kvm_arm_set_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg);
+
+#define KVM_ARCH_WANT_MMU_NOTIFIER
+int kvm_unmap_hva(struct kvm *kvm, unsigned long hva);
+int kvm_unmap_hva_range(struct kvm *kvm,
+ unsigned long start, unsigned long end);
+void kvm_set_spte_hva(struct kvm *kvm, unsigned long hva, pte_t pte);
+int kvm_age_hva(struct kvm *kvm, unsigned long start, unsigned long end);
+int kvm_test_age_hva(struct kvm *kvm, unsigned long hva);
+
+/* We do not have shadow page tables, hence the empty hooks */
+static inline void kvm_arch_mmu_notifier_invalidate_page(struct kvm *kvm,
+ unsigned long address)
+{
+}
+
+struct kvm_vcpu *kvm_arm_get_running_vcpu(void);
+struct kvm_vcpu * __percpu *kvm_get_running_vcpus(void);
+
+u64 kvm_call_hyp(void *hypfn, ...);
+void force_vm_exit(const cpumask_t *mask);
+void kvm_mmu_wp_memory_region(struct kvm *kvm, int slot);
+
+int handle_exit(struct kvm_vcpu *vcpu, struct kvm_run *run,
+ int exception_index);
+
+int kvm_perf_init(void);
+int kvm_perf_teardown(void);
+
+struct kvm_vcpu *kvm_mpidr_to_vcpu(struct kvm *kvm, unsigned long mpidr);
+
+static inline void __cpu_init_hyp_mode(phys_addr_t boot_pgd_ptr,
+ phys_addr_t pgd_ptr,
+ unsigned long hyp_stack_ptr,
+ unsigned long vector_ptr)
+{
+ /*
+ * Call initialization code, and switch to the full blown
+ * HYP code.
+ */
+ kvm_call_hyp((void *)boot_pgd_ptr, pgd_ptr,
+ hyp_stack_ptr, vector_ptr);
+}
+
+struct vgic_sr_vectors {
+ void *save_vgic;
+ void *restore_vgic;
+};
+
+static inline void vgic_arch_setup(const struct vgic_params *vgic)
+{
+ extern struct vgic_sr_vectors __vgic_sr_vectors;
+
+ switch(vgic->type)
+ {
+ case VGIC_V2:
+ __vgic_sr_vectors.save_vgic = __save_vgic_v2_state;
+ __vgic_sr_vectors.restore_vgic = __restore_vgic_v2_state;
+ break;
+
+#ifdef CONFIG_ARM_GIC_V3
+ case VGIC_V3:
+ __vgic_sr_vectors.save_vgic = __save_vgic_v3_state;
+ __vgic_sr_vectors.restore_vgic = __restore_vgic_v3_state;
+ break;
+#endif
+
+ default:
+ BUG();
+ }
+}
+
+static inline void kvm_arch_hardware_disable(void) {}
+static inline void kvm_arch_hardware_unsetup(void) {}
+static inline void kvm_arch_sync_events(struct kvm *kvm) {}
+static inline void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu) {}
+static inline void kvm_arch_sched_in(struct kvm_vcpu *vcpu, int cpu) {}
+
+#endif /* __ARM64_KVM_HOST_H__ */