Subject: [PATCH][v2] powerpc: Support lower minimum entitlement for virtual processors

From: Robert Jennings <[email-masked]>
Date: Thu, 10 May 2012 13:55:49 -0500

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 <[email-masked]>
---
Dropped minimum to 1% and tested to ensure that pHYP handled this properly.
---
 arch/powerpc/kernel/prom_init.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index eca626e..46a3c42 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -689,6 +689,9 @@ 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 */
@@ -753,8 +756,9 @@ 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 */
@@ -771,7 +775,7 @@ 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 */
-- 
1.7.0.4