LXR qemu/linux-headers/asm-powerpc/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
  20#ifndef __POWERPC_KVM_PARA_H__
  21#define __POWERPC_KVM_PARA_H__
  22
  23#include <linux/types.h>
  24
  25/*
  26 * Additions to this struct must only occur at the end, and should be
  27 * accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present
  28 * (albeit not necessarily relevant to the current target hardware platform).
  29 *
  30 * Struct fields are always 32 or 64 bit aligned, depending on them being 32
  31 * or 64 bit wide respectively.
  32 *
  33 * See Documentation/virtual/kvm/ppc-pv.txt
  34 */
  35struct kvm_vcpu_arch_shared {
  36        __u64 scratch1;
  37        __u64 scratch2;
  38        __u64 scratch3;
  39        __u64 critical;         /* Guest may not get interrupts if == r1 */
  40        __u64 sprg0;
  41        __u64 sprg1;
  42        __u64 sprg2;
  43        __u64 sprg3;
  44        __u64 srr0;
  45        __u64 srr1;
  46        __u64 dar;              /* dear on BookE */
  47        __u64 msr;
  48        __u32 dsisr;
  49        __u32 int_pending;      /* Tells the guest if we have an interrupt */
  50        __u32 sr[16];
  51        __u32 mas0;
  52        __u32 mas1;
  53        __u64 mas7_3;
  54        __u64 mas2;
  55        __u32 mas4;
  56        __u32 mas6;
  57        __u32 esr;
  58        __u32 pir;
  59
  60        /*
  61         * SPRG4-7 are user-readable, so we can only keep these consistent
  62         * between the shared area and the real registers when there's an
  63         * intervening exit to KVM.  This also applies to SPRG3 on some
  64         * chips.
  65         *
  66         * This suffices for access by guest userspace, since in PR-mode
  67         * KVM, an exit must occur when changing the guest's MSR[PR].
  68         * If the guest kernel writes to SPRG3-7 via the shared area, it
  69         * must also use the shared area for reading while in kernel space.
  70         */
  71        __u64 sprg4;
  72        __u64 sprg5;
  73        __u64 sprg6;
  74        __u64 sprg7;
  75};
  76
  77#define KVM_SC_MAGIC_R0         0x4b564d21 /* "KVM!" */
  78
  79#define KVM_HCALL_TOKEN(num)     _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num)
  80
  81#include <asm/epapr_hcalls.h>
  82
  83#define KVM_FEATURE_MAGIC_PAGE  1
  84
  85/* Magic page flags from host to guest */
  86
  87#define KVM_MAGIC_FEAT_SR               (1 << 0)
  88
  89/* MASn, ESR, PIR, and high SPRGs */
  90#define KVM_MAGIC_FEAT_MAS0_TO_SPRG7    (1 << 1)
  91
  92/* Magic page flags from guest to host */
  93
  94#define MAGIC_PAGE_FLAG_NOT_MAPPED_NX   (1 << 0)
  95
  96
  97#endif /* __POWERPC_KVM_PARA_H__ */
  98