powerpc/pseries: Update arch vector to indicate support for CMO

Update the architecture vector to indicate that Cooperative Memory
Overcommitment is supported if CONFIG_PPC_SMLPAR is set.

Signed-off-by: Nathan Fontenot <nfont@austin.ibm.com>
Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com>
Acked-by: Paul Mackerras <paulus@samba.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 8 insertions, 1 deletions

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 1ea8c8d3ce89..c4ab2195b9cb 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -643,6 +643,11 @@ static void __init early_cmdline_parse(void)
 #else
 #define OV5_MSI                 0x00
 #endif /* CONFIG_PCI_MSI */
+#ifdef CONFIG_PPC_SMLPAR
+#define OV5_CMO                 0x80    /* Cooperative Memory Overcommitment */
+#else
+#define OV5_CMO                 0x00
+#endif
 
 /*
  * The architecture vector has an array of PVR mask/value pairs,
@@ -687,10 +692,12 @@ static unsigned char ibm_architecture_vec[] = {
         0,                              /* don't halt */
 
         /* option vector 5: PAPR/OF options */
-        3 - 2,                          /* length */
+        5 - 2,                          /* length */
         0,                              /* don't ignore, don't halt */
         OV5_LPAR | OV5_SPLPAR | OV5_LARGE_PAGES | OV5_DRCONF_MEMORY |
         OV5_DONATE_DEDICATE_CPU | OV5_MSI,
+        0,
+        OV5_CMO,
 };
 
 /* Old method - ELF header with PT_NOTE sections */