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ARM/ARM64: KVM: Add common header for PSCI related defines

We need a common place to share PSCI related defines among ARM kernel, ARM64 kernel, KVM ARM/ARM64 PSCI emulation, and user space. We introduce uapi/linux/psci.h for this purpose. This newly added header will be first used by KVM ARM/ARM64 in-kernel PSCI emulation and user space (i.e. QEMU or KVMTOOL).

Anup Patel committed 12 years ago

Commit e546eea1 parent 717abd22 files · +91 −0Browse files

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2 files
  1. include/uapi/linux/Kbuild +1 −0
  2. include/uapi/linux/psci.h +90 −0
include/uapi/linux/Kbuild+1−0
@@ -317,6 +317,7 @@ header-y += ppp-ioctl.h · 316 unmodified lines
317317 header-y += ppp_defs.h
318318 header-y += pps.h
319319 header-y += prctl.h
320+header-y += psci.h
320321 header-y += ptp_clock.h
321322 header-y += ptrace.h
322323 header-y += qnx4_fs.h
include/uapi/linux/psci.h+90−0
@@ -0,0 +1,90 @@
1+/*
2+ * ARM Power State and Coordination Interface (PSCI) header
3+ *
4+ * This header holds common PSCI defines and macros shared
5+ * by: ARM kernel, ARM64 kernel, KVM ARM/ARM64 and user space.
6+ *
7+ * Copyright (C) 2014 Linaro Ltd.
8+ * Author: Anup Patel <anup.patel@linaro.org>
9+ */
10+
11+#ifndef _UAPI_LINUX_PSCI_H
12+#define _UAPI_LINUX_PSCI_H
13+
14+/*
15+ * PSCI v0.1 interface
16+ *
17+ * The PSCI v0.1 function numbers are implementation defined.
18+ *
19+ * Only PSCI return values such as: SUCCESS, NOT_SUPPORTED,
20+ * INVALID_PARAMS, and DENIED defined below are applicable
21+ * to PSCI v0.1.
22+ */
23+
24+/* PSCI v0.2 interface */
25+#define PSCI_0_2_FN_BASE 0x84000000
26+#define PSCI_0_2_FN(n) (PSCI_0_2_FN_BASE + (n))
27+#define PSCI_0_2_64BIT 0x40000000
28+#define PSCI_0_2_FN64_BASE \
29+ (PSCI_0_2_FN_BASE + PSCI_0_2_64BIT)
30+#define PSCI_0_2_FN64(n) (PSCI_0_2_FN64_BASE + (n))
31+
32+#define PSCI_0_2_FN_PSCI_VERSION PSCI_0_2_FN(0)
33+#define PSCI_0_2_FN_CPU_SUSPEND PSCI_0_2_FN(1)
34+#define PSCI_0_2_FN_CPU_OFF PSCI_0_2_FN(2)
35+#define PSCI_0_2_FN_CPU_ON PSCI_0_2_FN(3)
36+#define PSCI_0_2_FN_AFFINITY_INFO PSCI_0_2_FN(4)
37+#define PSCI_0_2_FN_MIGRATE PSCI_0_2_FN(5)
38+#define PSCI_0_2_FN_MIGRATE_INFO_TYPE PSCI_0_2_FN(6)
39+#define PSCI_0_2_FN_MIGRATE_INFO_UP_CPU PSCI_0_2_FN(7)
40+#define PSCI_0_2_FN_SYSTEM_OFF PSCI_0_2_FN(8)
41+#define PSCI_0_2_FN_SYSTEM_RESET PSCI_0_2_FN(9)
42+
43+#define PSCI_0_2_FN64_CPU_SUSPEND PSCI_0_2_FN64(1)
44+#define PSCI_0_2_FN64_CPU_ON PSCI_0_2_FN64(3)
45+#define PSCI_0_2_FN64_AFFINITY_INFO PSCI_0_2_FN64(4)
46+#define PSCI_0_2_FN64_MIGRATE PSCI_0_2_FN64(5)
47+#define PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU PSCI_0_2_FN64(7)
48+
49+/* PSCI v0.2 power state encoding for CPU_SUSPEND function */
50+#define PSCI_0_2_POWER_STATE_ID_MASK 0xffff
51+#define PSCI_0_2_POWER_STATE_ID_SHIFT 0
52+#define PSCI_0_2_POWER_STATE_TYPE_SHIFT 16
53+#define PSCI_0_2_POWER_STATE_TYPE_MASK \
54+ (0x1 << PSCI_0_2_POWER_STATE_TYPE_SHIFT)
55+#define PSCI_0_2_POWER_STATE_AFFL_SHIFT 24
56+#define PSCI_0_2_POWER_STATE_AFFL_MASK \
57+ (0x3 << PSCI_0_2_POWER_STATE_AFFL_SHIFT)
58+
59+/* PSCI v0.2 affinity level state returned by AFFINITY_INFO */
60+#define PSCI_0_2_AFFINITY_LEVEL_ON 0
61+#define PSCI_0_2_AFFINITY_LEVEL_OFF 1
62+#define PSCI_0_2_AFFINITY_LEVEL_ON_PENDING 2
63+
64+/* PSCI v0.2 multicore support in Trusted OS returned by MIGRATE_INFO_TYPE */
65+#define PSCI_0_2_TOS_UP_MIGRATE 0
66+#define PSCI_0_2_TOS_UP_NO_MIGRATE 1
67+#define PSCI_0_2_TOS_MP 2
68+
69+/* PSCI version decoding (independent of PSCI version) */
70+#define PSCI_VERSION_MAJOR_SHIFT 16
71+#define PSCI_VERSION_MINOR_MASK \
72+ ((1U << PSCI_VERSION_MAJOR_SHIFT) - 1)
73+#define PSCI_VERSION_MAJOR_MASK ~PSCI_VERSION_MINOR_MASK
74+#define PSCI_VERSION_MAJOR(ver) \
75+ (((ver) & PSCI_VERSION_MAJOR_MASK) >> PSCI_VERSION_MAJOR_SHIFT)
76+#define PSCI_VERSION_MINOR(ver) \
77+ ((ver) & PSCI_VERSION_MINOR_MASK)
78+
79+/* PSCI return values (inclusive of all PSCI versions) */
80+#define PSCI_RET_SUCCESS 0
81+#define PSCI_RET_NOT_SUPPORTED -1
82+#define PSCI_RET_INVALID_PARAMS -2
83+#define PSCI_RET_DENIED -3
84+#define PSCI_RET_ALREADY_ON -4
85+#define PSCI_RET_ON_PENDING -5
86+#define PSCI_RET_INTERNAL_FAILURE -6
87+#define PSCI_RET_NOT_PRESENT -7
88+#define PSCI_RET_DISABLED -8
89+
90+#endif /* _UAPI_LINUX_PSCI_H */