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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.
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.
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.
15 * Copyright IBM Corp. 2008
17 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
20 #ifndef _UAPI__POWERPC_KVM_PARA_H__
21 #define _UAPI__POWERPC_KVM_PARA_H__
23 #include <linux/types.h>
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).
30 * Struct fields are always 32 or 64 bit aligned, depending on them being 32
31 * or 64 bit wide respectively.
33 * See Documentation/virtual/kvm/ppc-pv.txt
35 struct kvm_vcpu_arch_shared
{
39 __u64 critical
; /* Guest may not get interrupts if == r1 */
46 __u64 dar
; /* dear on BookE */
49 __u32 int_pending
; /* Tells the guest if we have an interrupt */
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
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.
77 #define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */
79 #define KVM_HCALL_TOKEN(num) _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num)
81 #include <asm/epapr_hcalls.h>
83 #define KVM_FEATURE_MAGIC_PAGE 1
85 /* Magic page flags from host to guest */
87 #define KVM_MAGIC_FEAT_SR (1 << 0)
89 /* MASn, ESR, PIR, and high SPRGs */
90 #define KVM_MAGIC_FEAT_MAS0_TO_SPRG7 (1 << 1)
92 /* Magic page flags from guest to host */
94 #define MAGIC_PAGE_FLAG_NOT_MAPPED_NX (1 << 0)
97 #endif /* _UAPI__POWERPC_KVM_PARA_H__ */