diff options
Diffstat (limited to 'arch/arm64/include/asm/kvm_hyp.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_hyp.h | 107 |
1 files changed, 107 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/kvm_hyp.h b/arch/arm64/include/asm/kvm_hyp.h new file mode 100644 index 000000000..123e67cb8 --- /dev/null +++ b/arch/arm64/include/asm/kvm_hyp.h @@ -0,0 +1,107 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2015 - ARM Ltd + * Author: Marc Zyngier <marc.zyngier@arm.com> + */ + +#ifndef __ARM64_KVM_HYP_H__ +#define __ARM64_KVM_HYP_H__ + +#include <linux/compiler.h> +#include <linux/kvm_host.h> +#include <asm/alternative.h> +#include <asm/sysreg.h> + +DECLARE_PER_CPU(struct kvm_cpu_context, kvm_hyp_ctxt); +DECLARE_PER_CPU(unsigned long, kvm_hyp_vector); + +#define read_sysreg_elx(r,nvh,vh) \ + ({ \ + u64 reg; \ + asm volatile(ALTERNATIVE(__mrs_s("%0", r##nvh), \ + __mrs_s("%0", r##vh), \ + ARM64_HAS_VIRT_HOST_EXTN) \ + : "=r" (reg)); \ + reg; \ + }) + +#define write_sysreg_elx(v,r,nvh,vh) \ + do { \ + u64 __val = (u64)(v); \ + asm volatile(ALTERNATIVE(__msr_s(r##nvh, "%x0"), \ + __msr_s(r##vh, "%x0"), \ + ARM64_HAS_VIRT_HOST_EXTN) \ + : : "rZ" (__val)); \ + } while (0) + +/* + * Unified accessors for registers that have a different encoding + * between VHE and non-VHE. They must be specified without their "ELx" + * encoding, but with the SYS_ prefix, as defined in asm/sysreg.h. + */ + +#define read_sysreg_el0(r) read_sysreg_elx(r, _EL0, _EL02) +#define write_sysreg_el0(v,r) write_sysreg_elx(v, r, _EL0, _EL02) +#define read_sysreg_el1(r) read_sysreg_elx(r, _EL1, _EL12) +#define write_sysreg_el1(v,r) write_sysreg_elx(v, r, _EL1, _EL12) +#define read_sysreg_el2(r) read_sysreg_elx(r, _EL2, _EL1) +#define write_sysreg_el2(v,r) write_sysreg_elx(v, r, _EL2, _EL1) + +/* + * Without an __arch_swab32(), we fall back to ___constant_swab32(), but the + * static inline can allow the compiler to out-of-line this. KVM always wants + * the macro version as its always inlined. + */ +#define __kvm_swab32(x) ___constant_swab32(x) + +int __vgic_v2_perform_cpuif_access(struct kvm_vcpu *vcpu); + +void __vgic_v3_save_state(struct vgic_v3_cpu_if *cpu_if); +void __vgic_v3_restore_state(struct vgic_v3_cpu_if *cpu_if); +void __vgic_v3_activate_traps(struct vgic_v3_cpu_if *cpu_if); +void __vgic_v3_deactivate_traps(struct vgic_v3_cpu_if *cpu_if); +void __vgic_v3_save_aprs(struct vgic_v3_cpu_if *cpu_if); +void __vgic_v3_restore_aprs(struct vgic_v3_cpu_if *cpu_if); +int __vgic_v3_perform_cpuif_access(struct kvm_vcpu *vcpu); + +#ifdef __KVM_NVHE_HYPERVISOR__ +void __timer_enable_traps(struct kvm_vcpu *vcpu); +void __timer_disable_traps(struct kvm_vcpu *vcpu); +#endif + +#ifdef __KVM_NVHE_HYPERVISOR__ +void __sysreg_save_state_nvhe(struct kvm_cpu_context *ctxt); +void __sysreg_restore_state_nvhe(struct kvm_cpu_context *ctxt); +#else +void sysreg_save_host_state_vhe(struct kvm_cpu_context *ctxt); +void sysreg_restore_host_state_vhe(struct kvm_cpu_context *ctxt); +void sysreg_save_guest_state_vhe(struct kvm_cpu_context *ctxt); +void sysreg_restore_guest_state_vhe(struct kvm_cpu_context *ctxt); +#endif + +void __debug_switch_to_guest(struct kvm_vcpu *vcpu); +void __debug_switch_to_host(struct kvm_vcpu *vcpu); + +#ifdef __KVM_NVHE_HYPERVISOR__ +void __debug_save_host_buffers_nvhe(struct kvm_vcpu *vcpu); +void __debug_restore_host_buffers_nvhe(struct kvm_vcpu *vcpu); +#endif + +void __fpsimd_save_state(struct user_fpsimd_state *fp_regs); +void __fpsimd_restore_state(struct user_fpsimd_state *fp_regs); + +#ifndef __KVM_NVHE_HYPERVISOR__ +void activate_traps_vhe_load(struct kvm_vcpu *vcpu); +void deactivate_traps_vhe_put(void); +#endif + +u64 __guest_enter(struct kvm_vcpu *vcpu); + +void __noreturn hyp_panic(void); +#ifdef __KVM_NVHE_HYPERVISOR__ +void __noreturn __hyp_do_panic(struct kvm_cpu_context *host_ctxt, u64 spsr, + u64 elr, u64 par); +#endif + +#endif /* __ARM64_KVM_HYP_H__ */ + |