text: /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
  /*
   * This program is free software; you can redistribute it and/or modify
   * it under the terms of the GNU General Public License, version 2, as
   * published by the Free Software Foundation.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software
   * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
   *
   * Copyright IBM Corp. 2008
   *
   * Authors: Hollis Blanchard <hollisb@us.ibm.com>
   */
  
  #ifndef _UAPI__POWERPC_KVM_PARA_H__
  #define _UAPI__POWERPC_KVM_PARA_H__
  
  #include <linux/types.h>
  
  /*
   * Additions to this struct must only occur at the end, and should be
   * accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present
   * (albeit not necessarily relevant to the current target hardware platform).
   *
   * Struct fields are always 32 or 64 bit aligned, depending on them being 32
   * or 64 bit wide respectively.
   *
   * See Documentation/virt/kvm/ppc-pv.rst
   */
  struct kvm_vcpu_arch_shared {
  	__u64 scratch1;
  	__u64 scratch2;
  	__u64 scratch3;
  	__u64 critical;		/* Guest may not get interrupts if == r1 */
  	__u64 sprg0;
  	__u64 sprg1;
  	__u64 sprg2;
  	__u64 sprg3;
  	__u64 srr0;
  	__u64 srr1;
  	__u64 dar;		/* dear on BookE */
  	__u64 msr;
  	__u32 dsisr;
  	__u32 int_pending;	/* Tells the guest if we have an interrupt */
  	__u32 sr[16];
  	__u32 mas0;
  	__u32 mas1;
  	__u64 mas7_3;
  	__u64 mas2;
  	__u32 mas4;
  	__u32 mas6;
  	__u32 esr;
  	__u32 pir;
  
  	/*
  	 * SPRG4-7 are user-readable, so we can only keep these consistent
  	 * between the shared area and the real registers when there's an
  	 * intervening exit to KVM.  This also applies to SPRG3 on some
  	 * chips.
  	 *
  	 * This suffices for access by guest userspace, since in PR-mode
  	 * KVM, an exit must occur when changing the guest's MSR[PR].
  	 * If the guest kernel writes to SPRG3-7 via the shared area, it
  	 * must also use the shared area for reading while in kernel space.
  	 */
  	__u64 sprg4;
  	__u64 sprg5;
  	__u64 sprg6;
  	__u64 sprg7;
  };
  
  #define KVM_SC_MAGIC_R0		0x4b564d21 /* "KVM!" */
  
  #define KVM_HCALL_TOKEN(num)     _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num)
  
  #include <asm/epapr_hcalls.h>
  
  #define KVM_FEATURE_MAGIC_PAGE	1
  
  /* Magic page flags from host to guest */
  
  #define KVM_MAGIC_FEAT_SR		(1 << 0)
  
  /* MASn, ESR, PIR, and high SPRGs */
  #define KVM_MAGIC_FEAT_MAS0_TO_SPRG7	(1 << 1)
  
  /* Magic page flags from guest to host */
  
  #define MAGIC_PAGE_FLAG_NOT_MAPPED_NX	(1 << 0)
  
  
  #endif /* _UAPI__POWERPC_KVM_PARA_H__ */
  