arch/arm/kvm/hyp/s2-setup.c

   1 /*
   2  * Copyright (C) 2016 - 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/types.h>
  19 #include <asm/kvm_arm.h>
  20 #include <asm/kvm_asm.h>
  21 #include <asm/kvm_hyp.h>
  22
  23 void __hyp_text __init_stage2_translation(void)
  24 {
  25         u64 val;
  26
  27         val = read_sysreg(VTCR) & ~VTCR_MASK;
  28
  29         val |= read_sysreg(HTCR) & VTCR_HTCR_SH;
  30         val |= KVM_VTCR_SL0 | KVM_VTCR_T0SZ | KVM_VTCR_S;
  31
  32         write_sysreg(val, VTCR);
  33 }