projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 749cf76c CD |
1 | /* |
| 2 | * Copyright (C) 2012 - Virtual Open Systems and Columbia University | |
| 3 | * Author: Christoffer Dall <c.dall@virtualopensystems.com> | |
| 4 | * | |
| 5 | * This program is free software; you can redistribute it and/or modify | |
| 6 | * it under the terms of the GNU General Public License, version 2, as | |
| 7 | * published by the Free Software Foundation. | |
| 8 | * | |
| 9 | * This program is distributed in the hope that it will be useful, | |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 12 | * GNU General Public License for more details. | |
| 13 | * | |
| 14 | * You should have received a copy of the GNU General Public License | |
| 15 | * along with this program; if not, write to the Free Software | |
| 16 | * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. | |
| 17 | */ | |
| 18 | #include <linux/compiler.h> | |
| 19 | #include <linux/errno.h> | |
| 20 | #include <linux/sched.h> | |
| 21 | #include <linux/kvm_host.h> | |
| 22 | #include <linux/kvm.h> | |
| 23 | ||
| 24 | #include <asm/unified.h> | |
| 25 | #include <asm/ptrace.h> | |
| 26 | #include <asm/cputype.h> | |
| 27 | #include <asm/kvm_arm.h> | |
| 28 | #include <asm/kvm_coproc.h> | |
| 29 | ||
| 30 | /****************************************************************************** | |
| 31 | * Cortex-A15 Reset Values | |
| 32 | */ | |
| 33 | ||
| 34 | static const int a15_max_cpu_idx = 3; | |
| 35 | ||
| 36 | static struct kvm_regs a15_regs_reset = { | |
| 37 | .usr_regs.ARM_cpsr = SVC_MODE | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT, | |
| 38 | }; | |
| 39 | ||
| 40 | ||
| 41 | /******************************************************************************* | |
| 42 | * Exported reset function | |
| 43 | */ | |
| 44 | ||
| 45 | /** | |
| 46 | * kvm_reset_vcpu - sets core registers and cp15 registers to reset value | |
| 47 | * @vcpu: The VCPU pointer | |
| 48 | * | |
| 49 | * This function finds the right table above and sets the registers on the | |
| 50 | * virtual CPU struct to their architectually defined reset values. | |
| 51 | */ | |
| 52 | int kvm_reset_vcpu(struct kvm_vcpu *vcpu) | |
| 53 | { | |
| 54 | struct kvm_regs *cpu_reset; | |
| 55 | ||
| 56 | switch (vcpu->arch.target) { | |
| 57 | case KVM_ARM_TARGET_CORTEX_A15: | |
| 58 | if (vcpu->vcpu_id > a15_max_cpu_idx) | |
| 59 | return -EINVAL; | |
| 60 | cpu_reset = &a15_regs_reset; | |
| 61 | vcpu->arch.midr = read_cpuid_id(); | |
| 62 | break; | |
| 63 | default: | |
| 64 | return -ENODEV; | |
| 65 | } | |
| 66 | ||
| 67 | /* Reset core registers */ | |
| 68 | memcpy(&vcpu->arch.regs, cpu_reset, sizeof(vcpu->arch.regs)); | |
| 69 | ||
| 70 | /* Reset CP15 registers */ | |
| 71 | kvm_reset_coprocs(vcpu); | |
| 72 | ||
| 73 | return 0; | |
| 74 | } |