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

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Original code:
   4  * Copyright (C) 2012 - Virtual Open Systems and Columbia University
   5  * Author: Christoffer Dall <c.dall@virtualopensystems.com>
   6  *
   7  * Mostly rewritten in C by Marc Zyngier <marc.zyngier@arm.com>
   8  */
   9
  10 #include <asm/kvm_hyp.h>
  11
  12 /*
  13  * gcc before 4.9 doesn't understand -march=armv7ve, so we have to
  14  * trick the assembler.
  15  */
  16 __asm__(".arch_extension     virt");
  17
  18 void __hyp_text __banked_save_state(struct kvm_cpu_context *ctxt)
  19 {
  20         ctxt->gp_regs.usr_regs.ARM_sp   = read_special(SP_usr);
  21         ctxt->gp_regs.usr_regs.ARM_pc   = read_special(ELR_hyp);
  22         ctxt->gp_regs.usr_regs.ARM_cpsr = read_special(SPSR);
  23         ctxt->gp_regs.KVM_ARM_SVC_sp    = read_special(SP_svc);
  24         ctxt->gp_regs.KVM_ARM_SVC_lr    = read_special(LR_svc);
  25         ctxt->gp_regs.KVM_ARM_SVC_spsr  = read_special(SPSR_svc);
  26         ctxt->gp_regs.KVM_ARM_ABT_sp    = read_special(SP_abt);
  27         ctxt->gp_regs.KVM_ARM_ABT_lr    = read_special(LR_abt);
  28         ctxt->gp_regs.KVM_ARM_ABT_spsr  = read_special(SPSR_abt);
  29         ctxt->gp_regs.KVM_ARM_UND_sp    = read_special(SP_und);
  30         ctxt->gp_regs.KVM_ARM_UND_lr    = read_special(LR_und);
  31         ctxt->gp_regs.KVM_ARM_UND_spsr  = read_special(SPSR_und);
  32         ctxt->gp_regs.KVM_ARM_IRQ_sp    = read_special(SP_irq);
  33         ctxt->gp_regs.KVM_ARM_IRQ_lr    = read_special(LR_irq);
  34         ctxt->gp_regs.KVM_ARM_IRQ_spsr  = read_special(SPSR_irq);
  35         ctxt->gp_regs.KVM_ARM_FIQ_r8    = read_special(R8_fiq);
  36         ctxt->gp_regs.KVM_ARM_FIQ_r9    = read_special(R9_fiq);
  37         ctxt->gp_regs.KVM_ARM_FIQ_r10   = read_special(R10_fiq);
  38         ctxt->gp_regs.KVM_ARM_FIQ_fp    = read_special(R11_fiq);
  39         ctxt->gp_regs.KVM_ARM_FIQ_ip    = read_special(R12_fiq);
  40         ctxt->gp_regs.KVM_ARM_FIQ_sp    = read_special(SP_fiq);
  41         ctxt->gp_regs.KVM_ARM_FIQ_lr    = read_special(LR_fiq);
  42         ctxt->gp_regs.KVM_ARM_FIQ_spsr  = read_special(SPSR_fiq);
  43 }
  44
  45 void __hyp_text __banked_restore_state(struct kvm_cpu_context *ctxt)
  46 {
  47         write_special(ctxt->gp_regs.usr_regs.ARM_sp,    SP_usr);
  48         write_special(ctxt->gp_regs.usr_regs.ARM_pc,    ELR_hyp);
  49         write_special(ctxt->gp_regs.usr_regs.ARM_cpsr,  SPSR_cxsf);
  50         write_special(ctxt->gp_regs.KVM_ARM_SVC_sp,     SP_svc);
  51         write_special(ctxt->gp_regs.KVM_ARM_SVC_lr,     LR_svc);
  52         write_special(ctxt->gp_regs.KVM_ARM_SVC_spsr,   SPSR_svc);
  53         write_special(ctxt->gp_regs.KVM_ARM_ABT_sp,     SP_abt);
  54         write_special(ctxt->gp_regs.KVM_ARM_ABT_lr,     LR_abt);
  55         write_special(ctxt->gp_regs.KVM_ARM_ABT_spsr,   SPSR_abt);
  56         write_special(ctxt->gp_regs.KVM_ARM_UND_sp,     SP_und);
  57         write_special(ctxt->gp_regs.KVM_ARM_UND_lr,     LR_und);
  58         write_special(ctxt->gp_regs.KVM_ARM_UND_spsr,   SPSR_und);
  59         write_special(ctxt->gp_regs.KVM_ARM_IRQ_sp,     SP_irq);
  60         write_special(ctxt->gp_regs.KVM_ARM_IRQ_lr,     LR_irq);
  61         write_special(ctxt->gp_regs.KVM_ARM_IRQ_spsr,   SPSR_irq);
  62         write_special(ctxt->gp_regs.KVM_ARM_FIQ_r8,     R8_fiq);
  63         write_special(ctxt->gp_regs.KVM_ARM_FIQ_r9,     R9_fiq);
  64         write_special(ctxt->gp_regs.KVM_ARM_FIQ_r10,    R10_fiq);
  65         write_special(ctxt->gp_regs.KVM_ARM_FIQ_fp,     R11_fiq);
  66         write_special(ctxt->gp_regs.KVM_ARM_FIQ_ip,     R12_fiq);
  67         write_special(ctxt->gp_regs.KVM_ARM_FIQ_sp,     SP_fiq);
  68         write_special(ctxt->gp_regs.KVM_ARM_FIQ_lr,     LR_fiq);
  69         write_special(ctxt->gp_regs.KVM_ARM_FIQ_spsr,   SPSR_fiq);
  70 }