[SPARC64]: Report proper system soft state to the hypervisor.

Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 19 insertions, 0 deletions

diff --git a/arch/sparc64/prom/misc.c b/arch/sparc64/prom/misc.c
index 0b4213720d43..f3e0c14e9eef 100644
--- a/arch/sparc64/prom/misc.c
+++ b/arch/sparc64/prom/misc.c
@@ -15,6 +15,25 @@
 #include <asm/oplib.h>
 #include <asm/system.h>
 
+int prom_service_exists(const char *service_name)
+{
+        int err = p1275_cmd("test", P1275_ARG(0, P1275_ARG_IN_STRING) |
+                            P1275_INOUT(1, 1), service_name);
+
+        if (err)
+                return 0;
+        return 1;
+}
+
+void prom_sun4v_guest_soft_state(void)
+{
+        const char *svc = "SUNW,soft-state-supported";
+
+        if (!prom_service_exists(svc))
+                return;
+        p1275_cmd(svc, P1275_INOUT(0, 0));
+}
+
 /* Reset and reboot the machine with the command 'bcommand'. */
 void prom_reboot(const char *bcommand)
 {