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

   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 _UAPI__POWERPC_KVM_PARA_H__
  22#define _UAPI__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/virt/kvm/ppc-pv.rst
  35 */
  36struct 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 /* _UAPI__POWERPC_KVM_PARA_H__ */
  99