summaryrefslogtreecommitdiffstats
path: root/arch/sparc/kernel
diff options
context:
space:
mode:
authorVijay Kumar <vijay.ac.kumar@oracle.com>2017-07-21 10:23:56 -0600
committerDavid S. Miller <davem@davemloft.net>2017-08-09 22:15:10 -0700
commit28d43de741cc67a9d8748de7dcb6c5f54cfa669c (patch)
tree5a45e75d3d4b7a392a6b68d9ae69c27dd9071159 /arch/sparc/kernel
parent99274b818a5dc7c3226866970a0cec0d40ed5f0f (diff)
downloadop-kernel-dev-28d43de741cc67a9d8748de7dcb6c5f54cfa669c.zip
op-kernel-dev-28d43de741cc67a9d8748de7dcb6c5f54cfa669c.tar.gz
sparc64: Add a new hypercall CPU_POKE
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>
Diffstat (limited to 'arch/sparc/kernel')
-rw-r--r--arch/sparc/kernel/hvcalls.S11
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/sparc/kernel/hvcalls.S b/arch/sparc/kernel/hvcalls.S
index 4116ee5..e57007f 100644
--- a/arch/sparc/kernel/hvcalls.S
+++ b/arch/sparc/kernel/hvcalls.S
@@ -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
OpenPOWER on IntegriCloud