Re: powerpc/pseries: add definitions for new H_SIGNAL_SYS_RESET hcall

On Tue, 2016-11-08 at 06:08:06 UTC, Nicholas Piggin wrote:

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, /* generate a system reset NMI on   */
                                   /* the threads indicated by target  */
        int64 target); /* thread target selection */
        /* -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:
  - If the NMI handlers are not registered, terminate the partition.
  - 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>

Applied to powerpc next, thanks.

https://git.kernel.org/powerpc/c/53ce299615e587e900548eb6b384c3

cheers