[mirror_qemu.git] / linux-headers / asm-powerpc / kvm_para.h

/*
 * 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__ */
Commit	Line	Data
51b24e34 JK	1	/*
	2	* This program is free software; you can redistribute it and/or modify
	3	* it under the terms of the GNU General Public License, version 2, as
	4	* published by the Free Software Foundation.
	5	*
	6	* This program is distributed in the hope that it will be useful,
	7	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	8	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	9	* GNU General Public License for more details.
	10	*
	11	* You should have received a copy of the GNU General Public License
	12	* along with this program; if not, write to the Free Software
	13	* Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
	14	*
	15	* Copyright IBM Corp. 2008
	16	*
	17	* Authors: Hollis Blanchard <hollisb@us.ibm.com>
	18	*/
	19
d4834ff9 AG	20	#ifndef __POWERPC_KVM_PARA_H__
d4834ff9 AG	21	#define __POWERPC_KVM_PARA_H__
51b24e34 JK	22
	23	#include <linux/types.h>
	24
1529ae1b AG	25	/*
	26	* Additions to this struct must only occur at the end, and should be
	27	* accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present
	28	* (albeit not necessarily relevant to the current target hardware platform).
	29	*
	30	* Struct fields are always 32 or 64 bit aligned, depending on them being 32
	31	* or 64 bit wide respectively.
	32	*
	33	* See Documentation/virtual/kvm/ppc-pv.txt
	34	*/
51b24e34 JK	35	struct kvm_vcpu_arch_shared {
	36	__u64 scratch1;
	37	__u64 scratch2;
	38	__u64 scratch3;
	39	__u64 critical; /* Guest may not get interrupts if == r1 */
	40	__u64 sprg0;
	41	__u64 sprg1;
	42	__u64 sprg2;
	43	__u64 sprg3;
	44	__u64 srr0;
	45	__u64 srr1;
1529ae1b	46	__u64 dar; /* dear on BookE */
51b24e34 JK	47	__u64 msr;
	48	__u32 dsisr;
	49	__u32 int_pending; /* Tells the guest if we have an interrupt */
	50	__u32 sr[16];
1529ae1b AG	51	__u32 mas0;
	52	__u32 mas1;
	53	__u64 mas7_3;
	54	__u64 mas2;
	55	__u32 mas4;
	56	__u32 mas6;
	57	__u32 esr;
	58	__u32 pir;
	59
	60	/*
	61	* SPRG4-7 are user-readable, so we can only keep these consistent
	62	* between the shared area and the real registers when there's an
	63	* intervening exit to KVM. This also applies to SPRG3 on some
	64	* chips.
	65	*
	66	* This suffices for access by guest userspace, since in PR-mode
	67	* KVM, an exit must occur when changing the guest's MSR[PR].
	68	* If the guest kernel writes to SPRG3-7 via the shared area, it
	69	* must also use the shared area for reading while in kernel space.
	70	*/
	71	__u64 sprg4;
	72	__u64 sprg5;
	73	__u64 sprg6;
	74	__u64 sprg7;
51b24e34 JK	75	};
	76
	77	#define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */
d4834ff9 AG	78
	79	#define KVM_HCALL_TOKEN(num) _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num)
	80
	81	#include <asm/epapr_hcalls.h>
51b24e34 JK	82
	83	#define KVM_FEATURE_MAGIC_PAGE 1
	84
b061808d AG	85	/* Magic page flags from host to guest */
b061808d AG	86
1529ae1b AG	87	#define KVM_MAGIC_FEAT_SR (1 << 0)
	88
	89	/* MASn, ESR, PIR, and high SPRGs */
	90	#define KVM_MAGIC_FEAT_MAS0_TO_SPRG7 (1 << 1)
51b24e34	91
b061808d AG	92	/* Magic page flags from guest to host */
	93
	94	#define MAGIC_PAGE_FLAG_NOT_MAPPED_NX (1 << 0)
	95
51b24e34	96
d4834ff9	97	#endif /* __POWERPC_KVM_PARA_H__ */