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 | ||
5ae7f87a AP |
30 | #include <kvm/arm_arch_timer.h> |
31 | ||
749cf76c | 32 | /****************************************************************************** |
e8c2d99f | 33 | * Cortex-A15 and Cortex-A7 Reset Values |
749cf76c CD |
34 | */ |
35 | ||
e8c2d99f | 36 | static struct kvm_regs cortexa_regs_reset = { |
749cf76c CD |
37 | .usr_regs.ARM_cpsr = SVC_MODE | PSR_A_BIT | PSR_I_BIT | PSR_F_BIT, |
38 | }; | |
39 | ||
e8c2d99f | 40 | static const struct kvm_irq_level cortexa_vtimer_irq = { |
6833d838 | 41 | { .irq = 27 }, |
5ae7f87a AP |
42 | .level = 1, |
43 | }; | |
44 | ||
749cf76c CD |
45 | |
46 | /******************************************************************************* | |
47 | * Exported reset function | |
48 | */ | |
49 | ||
50 | /** | |
51 | * kvm_reset_vcpu - sets core registers and cp15 registers to reset value | |
52 | * @vcpu: The VCPU pointer | |
53 | * | |
54 | * This function finds the right table above and sets the registers on the | |
55 | * virtual CPU struct to their architectually defined reset values. | |
56 | */ | |
57 | int kvm_reset_vcpu(struct kvm_vcpu *vcpu) | |
58 | { | |
ac570e04 | 59 | struct kvm_regs *reset_regs; |
5ae7f87a | 60 | const struct kvm_irq_level *cpu_vtimer_irq; |
749cf76c CD |
61 | |
62 | switch (vcpu->arch.target) { | |
e8c2d99f | 63 | case KVM_ARM_TARGET_CORTEX_A7: |
749cf76c | 64 | case KVM_ARM_TARGET_CORTEX_A15: |
13acfd57 | 65 | reset_regs = &cortexa_regs_reset; |
749cf76c | 66 | vcpu->arch.midr = read_cpuid_id(); |
e8c2d99f | 67 | cpu_vtimer_irq = &cortexa_vtimer_irq; |
749cf76c CD |
68 | break; |
69 | default: | |
70 | return -ENODEV; | |
71 | } | |
72 | ||
73 | /* Reset core registers */ | |
c2a8dab5 | 74 | memcpy(&vcpu->arch.ctxt.gp_regs, reset_regs, sizeof(vcpu->arch.ctxt.gp_regs)); |
749cf76c CD |
75 | |
76 | /* Reset CP15 registers */ | |
77 | kvm_reset_coprocs(vcpu); | |
78 | ||
5ae7f87a | 79 | /* Reset arch_timer context */ |
f120cd65 | 80 | return kvm_timer_vcpu_reset(vcpu, cpu_vtimer_irq); |
749cf76c | 81 | } |