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).
Signed-off-by: Anup Patel anup.patel@linaro.org Signed-off-by: Pranavkumar Sawargaonkar pranavkumar@linaro.org --- include/uapi/linux/Kbuild | 1 + include/uapi/linux/psci.h | 55 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 56 insertions(+) create mode 100644 include/uapi/linux/psci.h
diff --git a/include/uapi/linux/Kbuild b/include/uapi/linux/Kbuild index 6929571..24e9033 100644 --- a/include/uapi/linux/Kbuild +++ b/include/uapi/linux/Kbuild @@ -317,6 +317,7 @@ header-y += ppp-ioctl.h header-y += ppp_defs.h header-y += pps.h header-y += prctl.h +header-y += psci.h header-y += ptp_clock.h header-y += ptrace.h header-y += qnx4_fs.h diff --git a/include/uapi/linux/psci.h b/include/uapi/linux/psci.h new file mode 100644 index 0000000..41f727e --- /dev/null +++ b/include/uapi/linux/psci.h @@ -0,0 +1,55 @@ +/* + * ARM Power State and Coordination Interface (PSCI) header + * + * This header holds common PSCI defines and macros shared by: + * ARM kernel, ARM64 kernel, KVM ARM/ARM64 and user space. + * + * Copyright (C) 2014 Anup Patel anup.patel@linaro.org + */ + +#ifndef _UAPI_LINUX_PSCI_H +#define _UAPI_LINUX_PSCI_H + +/* PSCI v0.1 interface */ +#define PSCI_FN(base, n) ((base) + (n)) + +#define PSCI_FN_CPU_SUSPEND(base) PSCI_FN(base, 0) +#define PSCI_FN_CPU_OFF(base) PSCI_FN(base, 1) +#define PSCI_FN_CPU_ON(base) PSCI_FN(base, 2) +#define PSCI_FN_MIGRATE(base) PSCI_FN(base, 3) + +/* PSCI v0.2 interface */ +#define PSCI_0_2_FN_BASE 0x84000000 +#define PSCI_0_2_FN(n) (PSCI_0_2_FN_BASE + (n)) +#define PSCI_0_2_FN64_BASE 0xC4000000 +#define PSCI_0_2_FN64(n) (PSCI_0_2_FN64_BASE + (n)) + +#define PSCI_0_2_FN_PSCI_VERSION PSCI_0_2_FN(0) +#define PSCI_0_2_FN_CPU_SUSPEND PSCI_0_2_FN(1) +#define PSCI_0_2_FN_CPU_OFF PSCI_0_2_FN(2) +#define PSCI_0_2_FN_CPU_ON PSCI_0_2_FN(3) +#define PSCI_0_2_FN_AFFINITY_INFO PSCI_0_2_FN(4) +#define PSCI_0_2_FN_MIGRATE PSCI_0_2_FN(5) +#define PSCI_0_2_FN_MIGRATE_INFO_TYPE PSCI_0_2_FN(6) +#define PSCI_0_2_FN_MIGRATE_INFO_UP_CPU PSCI_0_2_FN(7) +#define PSCI_0_2_FN_SYSTEM_OFF PSCI_0_2_FN(8) +#define PSCI_0_2_FN_SYSTEM_RESET PSCI_0_2_FN(9) + +#define PSCI_0_2_FN64_CPU_SUSPEND PSCI_0_2_FN64(1) +#define PSCI_0_2_FN64_CPU_ON PSCI_0_2_FN64(3) +#define PSCI_0_2_FN64_AFFINITY_INFO PSCI_0_2_FN64(4) +#define PSCI_0_2_FN64_MIGRATE PSCI_0_2_FN64(5) +#define PSCI_0_2_FN64_MIGRATE_INFO_UP_CPU PSCI_0_2_FN64(7) + +/* PSCI return values */ +#define PSCI_RET_SUCCESS 0 +#define PSCI_RET_NOT_SUPPORTED ((unsigned long)-1) +#define PSCI_RET_INVALID_PARAMS ((unsigned long)-2) +#define PSCI_RET_DENIED ((unsigned long)-3) +#define PSCI_RET_ALREADY_ON ((unsigned long)-4) +#define PSCI_RET_ON_PENDING ((unsigned long)-5) +#define PSCI_RET_INTERNAL_FAILURE ((unsigned long)-6) +#define PSCI_RET_NOT_PRESENT ((unsigned long)-7) +#define PSCI_RET_DISABLED ((unsigned long)-8) + +#endif /* _UAPI_LINUX_PSCI_H */