/* * Copyright (C) 2012 - Virtual Open Systems and Columbia University * Author: Christoffer Dall * * 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, write to the Free Software * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #include #include #include #include #include #include #include #include #include #include #include /****************************************************************************** * Cortex-A15 and Cortex-A7 Reset Values */ static const int cortexa_max_cpu_idx = 3; static struct kvm_regs cortexa_regs_reset = { .usr_regs.ARM_cpsr = SVC_MODE | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT, }; static const struct kvm_irq_level cortexa_vtimer_irq = { { .irq = 27 }, .level = 1, }; /******************************************************************************* * Exported reset function */ /** * kvm_reset_vcpu - sets core registers and cp15 registers to reset value * @vcpu: The VCPU pointer * * This function finds the right table above and sets the registers on the * virtual CPU struct to their architectually defined reset values. */ int kvm_reset_vcpu(struct kvm_vcpu *vcpu) { struct kvm_regs *cpu_reset; const struct kvm_irq_level *cpu_vtimer_irq; switch (vcpu->arch.target) { case KVM_ARM_TARGET_CORTEX_A7: case KVM_ARM_TARGET_CORTEX_A15: if (vcpu->vcpu_id > cortexa_max_cpu_idx) return -EINVAL; cpu_reset = &cortexa_regs_reset; vcpu->arch.midr = read_cpuid_id(); cpu_vtimer_irq = &cortexa_vtimer_irq; break; default: return -ENODEV; } /* Reset core registers */ memcpy(&vcpu->arch.regs, cpu_reset, sizeof(vcpu->arch.regs)); /* Reset CP15 registers */ kvm_reset_coprocs(vcpu); /* Reset arch_timer context */ kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq); return 0; }