arch/arm64/kvm/hyp/sysreg-sr.c

   1 /*
   2  * Copyright (C) 2012-2015 - ARM Ltd
   3  * Author: Marc Zyngier <marc.zyngier@arm.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, see <http://www.gnu.org/licenses/>.
  16  */
  17
  18 #include <linux/compiler.h>
  19 #include <linux/kvm_host.h>
  20
  21 #include <asm/kvm_asm.h>
  22 #include <asm/kvm_mmu.h>
  23
  24 #include "hyp.h"
  25
  26 /* ctxt is already in the HYP VA space */
  27 void __hyp_text __sysreg_save_state(struct kvm_cpu_context *ctxt)
  28 {
  29         ctxt->sys_regs[MPIDR_EL1]       = read_sysreg(vmpidr_el2);
  30         ctxt->sys_regs[CSSELR_EL1]      = read_sysreg(csselr_el1);
  31         ctxt->sys_regs[SCTLR_EL1]       = read_sysreg(sctlr_el1);
  32         ctxt->sys_regs[ACTLR_EL1]       = read_sysreg(actlr_el1);
  33         ctxt->sys_regs[CPACR_EL1]       = read_sysreg(cpacr_el1);
  34         ctxt->sys_regs[TTBR0_EL1]       = read_sysreg(ttbr0_el1);
  35         ctxt->sys_regs[TTBR1_EL1]       = read_sysreg(ttbr1_el1);
  36         ctxt->sys_regs[TCR_EL1]         = read_sysreg(tcr_el1);
  37         ctxt->sys_regs[ESR_EL1]         = read_sysreg(esr_el1);
  38         ctxt->sys_regs[AFSR0_EL1]       = read_sysreg(afsr0_el1);
  39         ctxt->sys_regs[AFSR1_EL1]       = read_sysreg(afsr1_el1);
  40         ctxt->sys_regs[FAR_EL1]         = read_sysreg(far_el1);
  41         ctxt->sys_regs[MAIR_EL1]        = read_sysreg(mair_el1);
  42         ctxt->sys_regs[VBAR_EL1]        = read_sysreg(vbar_el1);
  43         ctxt->sys_regs[CONTEXTIDR_EL1]  = read_sysreg(contextidr_el1);
  44         ctxt->sys_regs[TPIDR_EL0]       = read_sysreg(tpidr_el0);
  45         ctxt->sys_regs[TPIDRRO_EL0]     = read_sysreg(tpidrro_el0);
  46         ctxt->sys_regs[TPIDR_EL1]       = read_sysreg(tpidr_el1);
  47         ctxt->sys_regs[AMAIR_EL1]       = read_sysreg(amair_el1);
  48         ctxt->sys_regs[CNTKCTL_EL1]     = read_sysreg(cntkctl_el1);
  49         ctxt->sys_regs[PAR_EL1]         = read_sysreg(par_el1);
  50         ctxt->sys_regs[MDSCR_EL1]       = read_sysreg(mdscr_el1);
  51
  52         ctxt->gp_regs.regs.sp           = read_sysreg(sp_el0);
  53         ctxt->gp_regs.regs.pc           = read_sysreg(elr_el2);
  54         ctxt->gp_regs.regs.pstate       = read_sysreg(spsr_el2);
  55         ctxt->gp_regs.sp_el1            = read_sysreg(sp_el1);
  56         ctxt->gp_regs.elr_el1           = read_sysreg(elr_el1);
  57         ctxt->gp_regs.spsr[KVM_SPSR_EL1]= read_sysreg(spsr_el1);
  58 }
  59
  60 void __hyp_text __sysreg_restore_state(struct kvm_cpu_context *ctxt)
  61 {
  62         write_sysreg(ctxt->sys_regs[MPIDR_EL1],   vmpidr_el2);
  63         write_sysreg(ctxt->sys_regs[CSSELR_EL1],  csselr_el1);
  64         write_sysreg(ctxt->sys_regs[SCTLR_EL1],   sctlr_el1);
  65         write_sysreg(ctxt->sys_regs[ACTLR_EL1],   actlr_el1);
  66         write_sysreg(ctxt->sys_regs[CPACR_EL1],   cpacr_el1);
  67         write_sysreg(ctxt->sys_regs[TTBR0_EL1],   ttbr0_el1);
  68         write_sysreg(ctxt->sys_regs[TTBR1_EL1],   ttbr1_el1);
  69         write_sysreg(ctxt->sys_regs[TCR_EL1],     tcr_el1);
  70         write_sysreg(ctxt->sys_regs[ESR_EL1],     esr_el1);
  71         write_sysreg(ctxt->sys_regs[AFSR0_EL1],   afsr0_el1);
  72         write_sysreg(ctxt->sys_regs[AFSR1_EL1],   afsr1_el1);
  73         write_sysreg(ctxt->sys_regs[FAR_EL1],     far_el1);
  74         write_sysreg(ctxt->sys_regs[MAIR_EL1],    mair_el1);
  75         write_sysreg(ctxt->sys_regs[VBAR_EL1],    vbar_el1);
  76         write_sysreg(ctxt->sys_regs[CONTEXTIDR_EL1], contextidr_el1);
  77         write_sysreg(ctxt->sys_regs[TPIDR_EL0],   tpidr_el0);
  78         write_sysreg(ctxt->sys_regs[TPIDRRO_EL0], tpidrro_el0);
  79         write_sysreg(ctxt->sys_regs[TPIDR_EL1],   tpidr_el1);
  80         write_sysreg(ctxt->sys_regs[AMAIR_EL1],   amair_el1);
  81         write_sysreg(ctxt->sys_regs[CNTKCTL_EL1], cntkctl_el1);
  82         write_sysreg(ctxt->sys_regs[PAR_EL1],     par_el1);
  83         write_sysreg(ctxt->sys_regs[MDSCR_EL1],   mdscr_el1);
  84
  85         write_sysreg(ctxt->gp_regs.regs.sp,     sp_el0);
  86         write_sysreg(ctxt->gp_regs.regs.pc,     elr_el2);
  87         write_sysreg(ctxt->gp_regs.regs.pstate, spsr_el2);
  88         write_sysreg(ctxt->gp_regs.sp_el1,      sp_el1);
  89         write_sysreg(ctxt->gp_regs.elr_el1,     elr_el1);
  90         write_sysreg(ctxt->gp_regs.spsr[KVM_SPSR_EL1], spsr_el1);
  91 }
  92
  93 void __hyp_text __sysreg32_save_state(struct kvm_vcpu *vcpu)
  94 {
  95         u64 *spsr, *sysreg;
  96
  97         if (read_sysreg(hcr_el2) & HCR_RW)
  98                 return;
  99
 100         spsr = vcpu->arch.ctxt.gp_regs.spsr;
 101         sysreg = vcpu->arch.ctxt.sys_regs;
 102
 103         spsr[KVM_SPSR_ABT] = read_sysreg(spsr_abt);
 104         spsr[KVM_SPSR_UND] = read_sysreg(spsr_und);
 105         spsr[KVM_SPSR_IRQ] = read_sysreg(spsr_irq);
 106         spsr[KVM_SPSR_FIQ] = read_sysreg(spsr_fiq);
 107
 108         sysreg[DACR32_EL2] = read_sysreg(dacr32_el2);
 109         sysreg[IFSR32_EL2] = read_sysreg(ifsr32_el2);
 110
 111         if (__fpsimd_enabled())
 112                 sysreg[FPEXC32_EL2] = read_sysreg(fpexc32_el2);
 113
 114         if (vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY)
 115                 sysreg[DBGVCR32_EL2] = read_sysreg(dbgvcr32_el2);
 116 }
 117
 118 void __hyp_text __sysreg32_restore_state(struct kvm_vcpu *vcpu)
 119 {
 120         u64 *spsr, *sysreg;
 121
 122         if (read_sysreg(hcr_el2) & HCR_RW)
 123                 return;
 124
 125         spsr = vcpu->arch.ctxt.gp_regs.spsr;
 126         sysreg = vcpu->arch.ctxt.sys_regs;
 127
 128         write_sysreg(spsr[KVM_SPSR_ABT], spsr_abt);
 129         write_sysreg(spsr[KVM_SPSR_UND], spsr_und);
 130         write_sysreg(spsr[KVM_SPSR_IRQ], spsr_irq);
 131         write_sysreg(spsr[KVM_SPSR_FIQ], spsr_fiq);
 132
 133         write_sysreg(sysreg[DACR32_EL2], dacr32_el2);
 134         write_sysreg(sysreg[IFSR32_EL2], ifsr32_el2);
 135
 136         if (vcpu->arch.debug_flags & KVM_ARM64_DEBUG_DIRTY)
 137                 write_sysreg(sysreg[DBGVCR32_EL2], dbgvcr32_el2);
 138 }