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>

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 99860273211b03a7c31958d0c8940bf56d51abec..2acf54ae84911958892945ec8eb8687e011b9c88 100644 (file)
--- 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 */