1 /*
2 * Original code:
3 * Copyright (C) 2012 - Virtual Open Systems and Columbia University
4 * Author: Christoffer Dall <c.dall@virtualopensystems.com>
5 *
6 * Mostly rewritten in C by Marc Zyngier <marc.zyngier@arm.com>
7 *
8 * This program is free software; you can redistribute it and/or modify
9 * it under the terms of the GNU General Public License version 2 as
10 * published by the Free Software Foundation.
11 *
12 * This program is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
19 */
20
21 #include <asm/kvm_hyp.h>
22
23 /*
24 * gcc before 4.9 doesn't understand -march=armv7ve, so we have to
25 * trick the assembler.
26 */
27 __asm__(".arch_extension virt");
28
__banked_save_state(struct kvm_cpu_context * ctxt)29 void __hyp_text __banked_save_state(struct kvm_cpu_context *ctxt)
30 {
31 ctxt->gp_regs.usr_regs.ARM_sp = read_special(SP_usr);
32 ctxt->gp_regs.usr_regs.ARM_pc = read_special(ELR_hyp);
33 ctxt->gp_regs.usr_regs.ARM_cpsr = read_special(SPSR);
34 ctxt->gp_regs.KVM_ARM_SVC_sp = read_special(SP_svc);
35 ctxt->gp_regs.KVM_ARM_SVC_lr = read_special(LR_svc);
36 ctxt->gp_regs.KVM_ARM_SVC_spsr = read_special(SPSR_svc);
37 ctxt->gp_regs.KVM_ARM_ABT_sp = read_special(SP_abt);
38 ctxt->gp_regs.KVM_ARM_ABT_lr = read_special(LR_abt);
39 ctxt->gp_regs.KVM_ARM_ABT_spsr = read_special(SPSR_abt);
40 ctxt->gp_regs.KVM_ARM_UND_sp = read_special(SP_und);
41 ctxt->gp_regs.KVM_ARM_UND_lr = read_special(LR_und);
42 ctxt->gp_regs.KVM_ARM_UND_spsr = read_special(SPSR_und);
43 ctxt->gp_regs.KVM_ARM_IRQ_sp = read_special(SP_irq);
44 ctxt->gp_regs.KVM_ARM_IRQ_lr = read_special(LR_irq);
45 ctxt->gp_regs.KVM_ARM_IRQ_spsr = read_special(SPSR_irq);
46 ctxt->gp_regs.KVM_ARM_FIQ_r8 = read_special(R8_fiq);
47 ctxt->gp_regs.KVM_ARM_FIQ_r9 = read_special(R9_fiq);
48 ctxt->gp_regs.KVM_ARM_FIQ_r10 = read_special(R10_fiq);
49 ctxt->gp_regs.KVM_ARM_FIQ_fp = read_special(R11_fiq);
50 ctxt->gp_regs.KVM_ARM_FIQ_ip = read_special(R12_fiq);
51 ctxt->gp_regs.KVM_ARM_FIQ_sp = read_special(SP_fiq);
52 ctxt->gp_regs.KVM_ARM_FIQ_lr = read_special(LR_fiq);
53 ctxt->gp_regs.KVM_ARM_FIQ_spsr = read_special(SPSR_fiq);
54 }
55
__banked_restore_state(struct kvm_cpu_context * ctxt)56 void __hyp_text __banked_restore_state(struct kvm_cpu_context *ctxt)
57 {
58 write_special(ctxt->gp_regs.usr_regs.ARM_sp, SP_usr);
59 write_special(ctxt->gp_regs.usr_regs.ARM_pc, ELR_hyp);
60 write_special(ctxt->gp_regs.usr_regs.ARM_cpsr, SPSR_cxsf);
61 write_special(ctxt->gp_regs.KVM_ARM_SVC_sp, SP_svc);
62 write_special(ctxt->gp_regs.KVM_ARM_SVC_lr, LR_svc);
63 write_special(ctxt->gp_regs.KVM_ARM_SVC_spsr, SPSR_svc);
64 write_special(ctxt->gp_regs.KVM_ARM_ABT_sp, SP_abt);
65 write_special(ctxt->gp_regs.KVM_ARM_ABT_lr, LR_abt);
66 write_special(ctxt->gp_regs.KVM_ARM_ABT_spsr, SPSR_abt);
67 write_special(ctxt->gp_regs.KVM_ARM_UND_sp, SP_und);
68 write_special(ctxt->gp_regs.KVM_ARM_UND_lr, LR_und);
69 write_special(ctxt->gp_regs.KVM_ARM_UND_spsr, SPSR_und);
70 write_special(ctxt->gp_regs.KVM_ARM_IRQ_sp, SP_irq);
71 write_special(ctxt->gp_regs.KVM_ARM_IRQ_lr, LR_irq);
72 write_special(ctxt->gp_regs.KVM_ARM_IRQ_spsr, SPSR_irq);
73 write_special(ctxt->gp_regs.KVM_ARM_FIQ_r8, R8_fiq);
74 write_special(ctxt->gp_regs.KVM_ARM_FIQ_r9, R9_fiq);
75 write_special(ctxt->gp_regs.KVM_ARM_FIQ_r10, R10_fiq);
76 write_special(ctxt->gp_regs.KVM_ARM_FIQ_fp, R11_fiq);
77 write_special(ctxt->gp_regs.KVM_ARM_FIQ_ip, R12_fiq);
78 write_special(ctxt->gp_regs.KVM_ARM_FIQ_sp, SP_fiq);
79 write_special(ctxt->gp_regs.KVM_ARM_FIQ_lr, LR_fiq);
80 write_special(ctxt->gp_regs.KVM_ARM_FIQ_spsr, SPSR_fiq);
81 }
82
