LXR linux/arch/powerpc/include/asm/kvm

   1/*
   2 * This program is free software; you can redistribute it and/or modify
   3 * it under the terms of the GNU General Public License, version 2, as
   4 * published by the Free Software Foundation.
   5 *
   6 * This program is distributed in the hope that it will be useful,
   7 * but WITHOUT ANY WARRANTY; without even the implied warranty of
   8 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   9 * GNU General Public License for more details.
  10 *
  11 * You should have received a copy of the GNU General Public License
  12 * along with this program; if not, write to the Free Software
  13 * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  14 *
  15 * Copyright IBM Corp. 2008
  16 *
  17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  18 */
  19#ifndef __POWERPC_KVM_PARA_H__
  20#define __POWERPC_KVM_PARA_H__
  21
  22#include <uapi/asm/kvm_para.h>
  23
  24#ifdef CONFIG_KVM_GUEST
  25
  26#include <linux/of.h>
  27
  28static inline int kvm_para_available(void)
  29{
  30        struct device_node *hyper_node;
  31
  32        hyper_node = of_find_node_by_path("/hypervisor");
  33        if (!hyper_node)
  34                return 0;
  35
  36        if (!of_device_is_compatible(hyper_node, "linux,kvm"))
  37                return 0;
  38
  39        return 1;
  40}
  41
  42#else
  43
  44static inline int kvm_para_available(void)
  45{
  46        return 0;
  47}
  48
  49#endif
  50
  51static inline unsigned int kvm_arch_para_features(void)
  52{
  53        unsigned long r;
  54
  55        if (!kvm_para_available())
  56                return 0;
  57
  58        if(epapr_hypercall0_1(KVM_HCALL_TOKEN(KVM_HC_FEATURES), &r))
  59                return 0;
  60
  61        return r;
  62}
  63
  64static inline bool kvm_check_and_clear_guest_paused(void)
  65{
  66        return false;
  67}
  68
  69#endif /* __POWERPC_KVM_PARA_H__ */
  70