arch/arm/kvm/hyp/hyp.h

   1 /*
   2  * Copyright (C) 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 #ifndef __ARM_KVM_HYP_H__
  19 #define __ARM_KVM_HYP_H__
  20
  21 #include <linux/compiler.h>
  22 #include <linux/kvm_host.h>
  23 #include <asm/kvm_mmu.h>
  24
  25 #define __hyp_text __section(.hyp.text) notrace
  26
  27 #define kern_hyp_va(v) (v)
  28 #define hyp_kern_va(v) (v)
  29
  30 #define __ACCESS_CP15(CRn, Op1, CRm, Op2)       \
  31         "mrc", "mcr", __stringify(p15, Op1, %0, CRn, CRm, Op2), u32
  32 #define __ACCESS_CP15_64(Op1, CRm)              \
  33         "mrrc", "mcrr", __stringify(p15, Op1, %Q0, %R0, CRm), u64
  34
  35 #define __write_sysreg(v, r, w, c, t)   asm volatile(w " " c : : "r" ((t)(v)))
  36 #define write_sysreg(v, ...)            __write_sysreg(v, __VA_ARGS__)
  37
  38 #define __read_sysreg(r, w, c, t) ({                            \
  39         t __val;                                                \
  40         asm volatile(r " " c : "=r" (__val));                   \
  41         __val;                                                  \
  42 })
  43 #define read_sysreg(...)                __read_sysreg(__VA_ARGS__)
  44
  45 #define VTTBR           __ACCESS_CP15_64(6, c2)
  46 #define ICIALLUIS       __ACCESS_CP15(c7, 0, c1, 0)
  47 #define TLBIALLIS       __ACCESS_CP15(c8, 0, c3, 0)
  48 #define TLBIALLNSNHIS   __ACCESS_CP15(c8, 4, c3, 4)
  49
  50 #endif /* __ARM_KVM_HYP_H__ */