On Mon, Apr 21, 2014 at 06:29:56PM +0530, Anup Patel wrote: > 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@xxxxxxxxxx> > Signed-off-by: Pranavkumar Sawargaonkar <pranavkumar@xxxxxxxxxx> > Signed-off-by: Ashwin Chaugule <ashwin.chaugule@xxxxxxxxxx> > --- > include/uapi/linux/Kbuild | 1 + > include/uapi/linux/psci.h | 85 +++++++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 86 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..0d4a136 > --- /dev/null > +++ b/include/uapi/linux/psci.h > @@ -0,0 +1,85 @@ > +/* > + * 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 Linaro Ltd. > + * Author: Anup Patel <anup.patel@xxxxxxxxxx> > + */ > + > +#ifndef _UAPI_LINUX_PSCI_H > +#define _UAPI_LINUX_PSCI_H > + > +/* > + * PSCI v0.1 interface > + * > + * The PSCI v0.1 function numbers are implementation defined. > + * > + * Only PSCI return values such as: SUCCESS, NOT_SUPPORTED, > + * INVALID_PARAMS, and DENIED defined below are applicable > + * to PSCI v0.1. > + */ > + > +/* 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_64BIT 0x40000000 > +#define PSCI_0_2_FN64_BASE \ > + (PSCI_0_2_FN_BASE + PSCI_0_2_64BIT) > +#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) > + > +#define PSCI_0_2_POWER_STATE_ID_MASK 0xffff > +#define PSCI_0_2_POWER_STATE_ID_SHIFT 0 > +#define PSCI_0_2_POWER_STATE_TYPE_MASK 0x1 Shouldn't this be (0x1 << PSCI_0_2_POWER_STATE_TYPE_SHIFT)? That seems to be the definition of a mask in the PSCI_VERSION_MAJOR_MASK below, at least be consistent in this file. > +#define PSCI_0_2_POWER_STATE_TYPE_SHIFT 16 > +#define PSCI_0_2_POWER_STATE_AFFL_MASK 0x3 same > +#define PSCI_0_2_POWER_STATE_AFFL_SHIFT 24 > + > +#define PSCI_0_2_AFFINITY_LEVEL_ON 0 > +#define PSCI_0_2_AFFINITY_LEVEL_OFF 1 > +#define PSCI_0_2_AFFINITY_LEVEL_ON_PENDING 2 I'm confused, what do these defines signify? I spent 10 minutes looking at the spec and now I think that you probably mean AFFINITY_INFO and that these are the possible return values? Probably warrants a comment. > + > +#define PSCI_0_2_TOS_UP_MIGRATE 0 > +#define PSCI_0_2_TOS_UP_NO_MIGRATE 1 > +#define PSCI_0_2_TOS_MP 2 Should probably also comment that "TOS" are return values for MIGRATE_INFO_TYPE. > + > +/* PSCI version decoding (independent of PSCI version) */ > +#define PSCI_VERSION_MAJOR_SHIFT 16 > +#define PSCI_VERSION_MINOR_MASK \ > + ((1U << PSCI_VERSION_MAJOR_SHIFT) - 1) > +#define PSCI_VERSION_MAJOR_MASK ~PSCI_VERSION_MINOR_MASK > +#define PSCI_VERSION_MAJOR(ver) \ > + (((ver) & PSCI_VERSION_MAJOR_MASK) >> PSCI_VERSION_MAJOR_SHIFT) > +#define PSCI_VERSION_MINOR(ver) \ > + ((ver) & PSCI_VERSION_MINOR_MASK) I find this really complicated compared to "#define MINOR_MASK 0xffff" and "#define MAJOR_MASK 0xffff0000" but whatever... > + > +/* PSCI return values (inclusive of all PSCI versions) */ > +#define PSCI_RET_SUCCESS 0 > +#define PSCI_RET_NOT_SUPPORTED -1 > +#define PSCI_RET_INVALID_PARAMS -2 > +#define PSCI_RET_DENIED -3 > +#define PSCI_RET_ALREADY_ON -4 > +#define PSCI_RET_ON_PENDING -5 > +#define PSCI_RET_INTERNAL_FAILURE -6 > +#define PSCI_RET_NOT_PRESENT -7 > +#define PSCI_RET_DISABLED -8 > + > +#endif /* _UAPI_LINUX_PSCI_H */ > -- > 1.7.9.5 > -Christoffer -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
