On Mon, Mar 31, 2014 at 5:46 AM, Anup Patel <anup.patel@xxxxxxxxxx> 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> > --- > 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@xxxxxxxxxx> Like I told Ashwin, fix the copyright. You can be the author, but Linaro is the copyright holder. > + */ > + > +#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)) This could be something like: #define PSCI_0_2_64BIT 0x40000000 #define PSCI_0_2_FN64(n) (PSCI_0_2_FN_BASE + PSCI_0_2_64BIT + (n)) It's also useful as you may want to be able to check for 64-bit calls. > + > +#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) These should not be cast. The return values are defined to be int32 independent of 64-bit or 32-bit calls. Rob _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
