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| author | Nicholas Piggin <npiggin@gmail.com> | 2016-11-08 17:08:06 +1100 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2016-11-30 23:19:59 +1100 |
| commit | 53ce299615e587e900548eb6b384c3081b71bbfa (patch) | |
| tree | e22e6de5121ffaa7b2d4455192794df991af9dd7 /arch/powerpc/include | |
| parent | 500c7ab1a9db4aaf318eba711899804f8ca34eaf (diff) | |
| download | linux-53ce299615e587e900548eb6b384c3081b71bbfa.tar.bz2 | |
powerpc/pseries: add definitions for new H_SIGNAL_SYS_RESET hcall
This has not made its way to a PAPR release yet, but we have an hcall
number assigned.
H_SIGNAL_SYS_RESET = 0x380
Syntax:
hcall(uint64 H_SIGNAL_SYS_RESET, int64 target);
Generate a system reset NMI on the threads indicated by target.
Values for target:
-1 = target all online threads including the caller
-2 = target all online threads except for the caller
All other negative values: reserved
Positive values: The thread to be targeted, obtained from the value
of the "ibm,ppc-interrupt-server#s" property of the CPU in the OF
device tree.
Semantics:
- Invalid target: return H_Parameter.
- Otherwise: Generate a system reset NMI on target thread(s),
return H_Success.
This will be used by crash/debug code to get stuck CPUs into a known
state.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/hvcall.h | 8 | ||||
| -rw-r--r-- | arch/powerpc/include/asm/plpar_wrappers.h | 5 |
2 files changed, 12 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/hvcall.h b/arch/powerpc/include/asm/hvcall.h index 8d5f8352afd7..77ff1ba99d1f 100644 --- a/arch/powerpc/include/asm/hvcall.h +++ b/arch/powerpc/include/asm/hvcall.h @@ -276,7 +276,8 @@ #define H_GET_MPP_X 0x314 #define H_SET_MODE 0x31C #define H_CLEAR_HPT 0x358 -#define MAX_HCALL_OPCODE H_CLEAR_HPT +#define H_SIGNAL_SYS_RESET 0x380 +#define MAX_HCALL_OPCODE H_SIGNAL_SYS_RESET /* H_VIOCTL functions */ #define H_GET_VIOA_DUMP_SIZE 0x01 @@ -307,6 +308,11 @@ #define H_SET_MODE_RESOURCE_ADDR_TRANS_MODE 3 #define H_SET_MODE_RESOURCE_LE 4 +/* Values for argument to H_SIGNAL_SYS_RESET */ +#define H_SIGNAL_SYS_RESET_ALL -1 +#define H_SIGNAL_SYS_RESET_ALL_OTHERS -2 +/* >= 0 values are CPU number */ + #ifndef __ASSEMBLY__ /** diff --git a/arch/powerpc/include/asm/plpar_wrappers.h b/arch/powerpc/include/asm/plpar_wrappers.h index 034a588b122c..0bcc75e295e3 100644 --- a/arch/powerpc/include/asm/plpar_wrappers.h +++ b/arch/powerpc/include/asm/plpar_wrappers.h @@ -308,4 +308,9 @@ static inline long plapr_set_watchpoint0(unsigned long dawr0, unsigned long dawr return plpar_set_mode(0, H_SET_MODE_RESOURCE_SET_DAWR, dawr0, dawrx0); } +static inline long plapr_signal_sys_reset(long cpu) +{ + return plpar_hcall_norets(H_SIGNAL_SYS_RESET, cpu); +} + #endif /* _ASM_POWERPC_PLPAR_WRAPPERS_H */ |