powerpc/pseries: Support lower minimum entitlement for virtual processors

This patch changes the architecture vector to advertise support for a
lower minimum virtual processor entitled capacity.  The default
minimum without this patch is 10%, this patch specifies 1%.

Signed-off-by: Robert Jennings <rcj@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 6 insertions, 2 deletions

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 99860273211b..2acf54ae8491 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -680,6 +680,9 @@ static void __init early_cmdline_parse(void)
 #define OV3_VMX                 0x40    /* VMX/Altivec */
 #define OV3_DFP                 0x20    /* decimal FP */
 
+/* Option vector 4: IBM PAPR implementation */
+#define OV4_MIN_ENT_CAP         0x01    /* minimum VP entitled capacity */
+
 /* Option vector 5: PAPR/OF options supported */
 #define OV5_LPAR                0x80    /* logical partitioning supported */
 #define OV5_SPLPAR              0x40    /* shared-processor LPAR supported */
@@ -744,8 +747,9 @@ static unsigned char ibm_architecture_vec[] = {
         OV3_FP | OV3_VMX | OV3_DFP,
 
         /* option vector 4: IBM PAPR implementation */
-        2 - 2,                          /* length */
+        3 - 2,                          /* length */
         0,                              /* don't halt */
+        OV4_MIN_ENT_CAP,                /* minimum VP entitled capacity */
 
         /* option vector 5: PAPR/OF options */
         13 - 2,                         /* length */
@@ -762,7 +766,7 @@ static unsigned char ibm_architecture_vec[] = {
          * must match by the macro below. Update the definition if
          * the structure layout changes.
          */
-#define IBM_ARCH_VEC_NRCORES_OFFSET     100
+#define IBM_ARCH_VEC_NRCORES_OFFSET     101
         W(NR_CPUS),                     /* number of cores supported */
 
         /* option vector 6: IBM PAPR hints */