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Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * Copyright IBM Corp. 2008
4 *
5 * Authors: Hollis Blanchard <hollisb@us.ibm.com>
6 */
7
8#ifndef _UAPI__POWERPC_KVM_PARA_H__
9#define _UAPI__POWERPC_KVM_PARA_H__
10
11#include <linux/types.h>
12
13/*
14 * Additions to this struct must only occur at the end, and should be
15 * accompanied by a KVM_MAGIC_FEAT flag to advertise that they are present
16 * (albeit not necessarily relevant to the current target hardware platform).
17 *
18 * Struct fields are always 32 or 64 bit aligned, depending on them being 32
19 * or 64 bit wide respectively.
20 *
21 * See Documentation/virt/kvm/ppc-pv.rst
22 */
23struct kvm_vcpu_arch_shared {
24 __u64 scratch1;
25 __u64 scratch2;
26 __u64 scratch3;
27 __u64 critical; /* Guest may not get interrupts if == r1 */
28 __u64 sprg0;
29 __u64 sprg1;
30 __u64 sprg2;
31 __u64 sprg3;
32 __u64 srr0;
33 __u64 srr1;
34 __u64 dar; /* dear on BookE */
35 __u64 msr;
36 __u32 dsisr;
37 __u32 int_pending; /* Tells the guest if we have an interrupt */
38 __u32 sr[16];
39 __u32 mas0;
40 __u32 mas1;
41 __u64 mas7_3;
42 __u64 mas2;
43 __u32 mas4;
44 __u32 mas6;
45 __u32 esr;
46 __u32 pir;
47
48 /*
49 * SPRG4-7 are user-readable, so we can only keep these consistent
50 * between the shared area and the real registers when there's an
51 * intervening exit to KVM. This also applies to SPRG3 on some
52 * chips.
53 *
54 * This suffices for access by guest userspace, since in PR-mode
55 * KVM, an exit must occur when changing the guest's MSR[PR].
56 * If the guest kernel writes to SPRG3-7 via the shared area, it
57 * must also use the shared area for reading while in kernel space.
58 */
59 __u64 sprg4;
60 __u64 sprg5;
61 __u64 sprg6;
62 __u64 sprg7;
63};
64
65#define KVM_SC_MAGIC_R0 0x4b564d21 /* "KVM!" */
66
67#define KVM_HCALL_TOKEN(num) _EV_HCALL_TOKEN(EV_KVM_VENDOR_ID, num)
68
69#include <asm/epapr_hcalls.h>
70
71#define KVM_FEATURE_MAGIC_PAGE 1
72
73/* Magic page flags from host to guest */
74
75#define KVM_MAGIC_FEAT_SR (1 << 0)
76
77/* MASn, ESR, PIR, and high SPRGs */
78#define KVM_MAGIC_FEAT_MAS0_TO_SPRG7 (1 << 1)
79
80/* Magic page flags from guest to host */
81
82#define MAGIC_PAGE_FLAG_NOT_MAPPED_NX (1 << 0)
83
84
85#endif /* _UAPI__POWERPC_KVM_PARA_H__ */