aa024c2f35
Implement the PSCI specification (ARM DEN 0022A) to control virtual CPUs being "powered" on or off. PSCI/KVM is detected using the KVM_CAP_ARM_PSCI capability. A virtual CPU can now be initialized in a "powered off" state, using the KVM_ARM_VCPU_POWER_OFF feature flag. The guest can use either SMC or HVC to execute a PSCI function. Reviewed-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Marc Zyngier <marc.zyngier@arm.com> Signed-off-by: Christoffer Dall <c.dall@virtualopensystems.com>
72 lines
2.2 KiB
C
72 lines
2.2 KiB
C
/*
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* Copyright (C) 2012 - Virtual Open Systems and Columbia University
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* Author: Christoffer Dall <c.dall@virtualopensystems.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License, version 2, as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __ARM_KVM_EMULATE_H__
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#define __ARM_KVM_EMULATE_H__
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#include <linux/kvm_host.h>
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#include <asm/kvm_asm.h>
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#include <asm/kvm_mmio.h>
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u32 *vcpu_reg(struct kvm_vcpu *vcpu, u8 reg_num);
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u32 *vcpu_spsr(struct kvm_vcpu *vcpu);
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int kvm_handle_wfi(struct kvm_vcpu *vcpu, struct kvm_run *run);
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void kvm_skip_instr(struct kvm_vcpu *vcpu, bool is_wide_instr);
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void kvm_inject_undefined(struct kvm_vcpu *vcpu);
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void kvm_inject_dabt(struct kvm_vcpu *vcpu, unsigned long addr);
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void kvm_inject_pabt(struct kvm_vcpu *vcpu, unsigned long addr);
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static inline bool vcpu_mode_is_32bit(struct kvm_vcpu *vcpu)
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{
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return 1;
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}
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static inline u32 *vcpu_pc(struct kvm_vcpu *vcpu)
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{
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return (u32 *)&vcpu->arch.regs.usr_regs.ARM_pc;
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}
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static inline u32 *vcpu_cpsr(struct kvm_vcpu *vcpu)
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{
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return (u32 *)&vcpu->arch.regs.usr_regs.ARM_cpsr;
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}
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static inline void vcpu_set_thumb(struct kvm_vcpu *vcpu)
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{
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*vcpu_cpsr(vcpu) |= PSR_T_BIT;
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}
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static inline bool mode_has_spsr(struct kvm_vcpu *vcpu)
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{
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unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
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return (cpsr_mode > USR_MODE && cpsr_mode < SYSTEM_MODE);
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}
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static inline bool vcpu_mode_priv(struct kvm_vcpu *vcpu)
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{
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unsigned long cpsr_mode = vcpu->arch.regs.usr_regs.ARM_cpsr & MODE_MASK;
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return cpsr_mode > USR_MODE;;
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}
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static inline bool kvm_vcpu_reg_is_pc(struct kvm_vcpu *vcpu, int reg)
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{
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return reg == 15;
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}
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#endif /* __ARM_KVM_EMULATE_H__ */
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