arch/arm/kvm/hyp/banked-sr.c

   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
  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
  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 }