linux-headers/asm-powerpc/kvm_para.h

   1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2 /*
   3  * This program is free software; you can redistribute it and/or modify
   4  * it under the terms of the GNU General Public License, version 2, as
   5  * published by the Free Software Foundation.
   6  *
   7  * This program is distributed in the hope that it will be useful,
   8  * but WITHOUT ANY WARRANTY; without even the implied warranty of
   9  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10  * GNU General Public License for more details.
  11  *
  12  * You should have received a copy of the GNU General Public License
  13  * along with this program; if not, write to the Free Software
  14  * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
  15  *
  16  * Copyright IBM Corp. 2008
  17  *
  18  * Authors: Hollis Blanchard <hollisb@us.ibm.com>
  19  */
  20
  21 #ifndef __POWERPC_KVM_PARA_H__
  22 #define __POWERPC_KVM_PARA_H__
  23
  24 #include <linux/types.h>
  25
  26 /*
  27  * Additions to this struct must only occur at the end, and should be
  28  * accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present
  29  * (albeit not necessarily relevant to the current target hardware platform).
  30  *
  31  * Struct fields are always 32 or 64 bit aligned, depending on them being 32
  32  * or 64 bit wide respectively.
  33  *
  34  * See Documentation/virtual/kvm/ppc-pv.txt
  35  */
  36 struct kvm_vcpu_arch_shared {
  37         __u64 scratch1;
  38         __u64 scratch2;
  39         __u64 scratch3;
  40         __u64 critical;         /* Guest may not get interrupts if == r1 */
  41         __u64 sprg0;
  42         __u64 sprg1;
  43         __u64 sprg2;
  44         __u64 sprg3;
  45         __u64 srr0;
  46         __u64 srr1;
  47         __u64 dar;              /* dear on BookE */
  48         __u64 msr;
  49         __u32 dsisr;
  50         __u32 int_pending;      /* Tells the guest if we have an interrupt */
  51         __u32 sr[16];
  52         __u32 mas0;
  53         __u32 mas1;
  54         __u64 mas7_3;
  55         __u64 mas2;
  56         __u32 mas4;
  57         __u32 mas6;
  58         __u32 esr;
  59         __u32 pir;
  60
  61         /*
  62          * SPRG4-7 are user-readable, so we can only keep these consistent
  63          * between the shared area and the real registers when there's an
  64          * intervening exit to KVM.  This also applies to SPRG3 on some
  65          * chips.
  66          *
  67          * This suffices for access by guest userspace, since in PR-mode
  68          * KVM, an exit must occur when changing the guest's MSR[PR].
  69          * If the guest kernel writes to SPRG3-7 via the shared area, it
  70          * must also use the shared area for reading while in kernel space.
  71          */
  72         __u64 sprg4;
  73         __u64 sprg5;
  74         __u64 sprg6;
  75         __u64 sprg7;
  76 };
  77
  78 #define KVM_SC_MAGIC_R0         0x4b564d21 /* "KVM!" */
  79
  80 #define KVM_HCALL_TOKEN(num)     _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num)
  81
  82 #include <asm/epapr_hcalls.h>
  83
  84 #define KVM_FEATURE_MAGIC_PAGE  1
  85
  86 /* Magic page flags from host to guest */
  87
  88 #define KVM_MAGIC_FEAT_SR               (1 << 0)
  89
  90 /* MASn, ESR, PIR, and high SPRGs */
  91 #define KVM_MAGIC_FEAT_MAS0_TO_SPRG7    (1 << 1)
  92
  93 /* Magic page flags from guest to host */
  94
  95 #define MAGIC_PAGE_FLAG_NOT_MAPPED_NX   (1 << 0)
  96
  97
  98 #endif /* __POWERPC_KVM_PARA_H__ */