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sparc64: Add a new hypercall CPU_POKE

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This adds a new hypercall CPU_POKE for quickly waking up an idle CPU.
CPU_POKE should only be sent to valid non-local CPUs.

Signed-off-by: Rob Gardner <rob.gardner@oracle.com>
Signed-off-by: Vijay Kumar <vijay.ac.kumar@oracle.com>
Reviewed-by: Anthony Yznaga <anthony.yznaga@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Vijay Kumar
2017-07-21 10:23:56 -06:00
committed by David S. Miller
parent 99274b818a
commit 28d43de741
2 changed files with 29 additions and 0 deletions
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11
arch/sparc/kernel/hvcalls.S
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@ -106,6 +106,17 @@ ENTRY(sun4v_cpu_yield)
nop
ENDPROC(sun4v_cpu_yield)
/* %o0: cpuid
*
* returns %o0: status
*/
ENTRY(sun4v_cpu_poke)
mov HV_FAST_CPU_POKE, %o5
ta HV_FAST_TRAP
retl
nop
ENDPROC(sun4v_cpu_poke)
/* %o0: type
* %o1: queue paddr
* %o2: num queue entries