| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Guest PC manipulation helpers |
| * |
| * Copyright (C) 2012,2013 - ARM Ltd |
| * Copyright (C) 2020 - Google LLC |
| * Author: Marc Zyngier <maz@kernel.org> |
| */ |
| |
| #ifndef __ARM64_KVM_HYP_ADJUST_PC_H__ |
| #define __ARM64_KVM_HYP_ADJUST_PC_H__ |
| |
| #include <asm/kvm_emulate.h> |
| #include <asm/kvm_host.h> |
| |
| static inline void kvm_skip_instr(struct kvm_vcpu *vcpu) |
| { |
| if (vcpu_mode_is_32bit(vcpu)) { |
| kvm_skip_instr32(vcpu); |
| } else { |
| *vcpu_pc(vcpu) += 4; |
| *vcpu_cpsr(vcpu) &= ~PSR_BTYPE_MASK; |
| } |
| |
| /* advance the singlestep state machine */ |
| *vcpu_cpsr(vcpu) &= ~DBG_SPSR_SS; |
| } |
| |
| /* |
| * Skip an instruction which has been emulated at hyp while most guest sysregs |
| * are live. |
| */ |
| static inline void __kvm_skip_instr(struct kvm_vcpu *vcpu) |
| { |
| *vcpu_pc(vcpu) = read_sysreg_el2(SYS_ELR); |
| vcpu_gp_regs(vcpu)->pstate = read_sysreg_el2(SYS_SPSR); |
| |
| kvm_skip_instr(vcpu); |
| |
| write_sysreg_el2(vcpu_gp_regs(vcpu)->pstate, SYS_SPSR); |
| write_sysreg_el2(*vcpu_pc(vcpu), SYS_ELR); |
| } |
| |
| /* |
| * Skip an instruction while host sysregs are live. |
| * Assumes host is always 64-bit. |
| */ |
| static inline void kvm_skip_host_instr(void) |
| { |
| write_sysreg_el2(read_sysreg_el2(SYS_ELR) + 4, SYS_ELR); |
| } |
| |
| #endif |
