linux-headers/asm-powerpc/kvm_para.h

   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  */
  35 struct 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__ */