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/* 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 __POWERPC_KVM_PARA_H__
#define __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/virtual/kvm/ppc-pv.txt
*/
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 /* __POWERPC_KVM_PARA_H__ */
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