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cxl: Add support for ASB_Notify on POWER9

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The POWER9 core supports a new feature: ASB_Notify which requires the
support of the Special Purpose Register: TIDR.

The ASB_Notify command, generated by the AFU, will attempt to
wake-up the host thread identified by the particular LPID:PID:TID.

This patch assign a unique TIDR (thread id) for the current thread which
will be used in the process element entry.

Signed-off-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Philippe Bergheaud <felix@linux.vnet.ibm.com>
Acked-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Reviewed-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Christophe Lombard
2018-01-11 09:55:25 +01:00
committed by Michael Ellerman
parent 074db39e00
commit b1db551324
7 changed files with 39 additions and 8 deletions
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arch/powerpc/kernel/process.c
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@@ -1590,6 +1590,7 @@ int set_thread_tidr(struct task_struct *t)
return 0;
}
EXPORT_SYMBOL_GPL(set_thread_tidr);
#endif /* CONFIG_PPC64 */