Re: [PATCH 1/4] powerpc/powernv: Add OPAL check token call

Currently there is no way to generically check if an OPAL call exists or not
from the host kernel.

This adds an OPAL call opal_check_token() which tells you if the given token is
present in OPAL or not.

Signed-off-by: Michael Neuling <redacted>
---
 arch/powerpc/include/asm/opal.h                | 7 +++++++
 arch/powerpc/platforms/powernv/opal-wrappers.S | 1 +
 2 files changed, 8 insertions(+)

diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
index 86055e5..4593a93 100644
--- a/arch/powerpc/include/asm/opal.h
+++ b/arch/powerpc/include/asm/opal.h

@@ -135,6 +135,7 @@ struct opal_sg_list {
 #define OPAL_FLASH_MANAGE			77
 #define OPAL_FLASH_UPDATE			78
 #define OPAL_RESYNC_TIMEBASE			79
+#define OPAL_CHECK_TOKEN			80
 #define OPAL_DUMP_INIT				81
 #define OPAL_DUMP_INFO				82
 #define OPAL_DUMP_READ				83

@@ -417,6 +418,11 @@ struct opal_msg {
 	__be64 params[8];
 };
 
+enum OpalCheckTokenStatus {
+       OPAL_TOKEN_ABSENT = 0,
+       OPAL_TOKEN_PRESENT = 1
+};