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+/*
+ * 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__ */