linux-kernel - [PATCH v2 05/17] pseries: Enabled the PFO-based RNG accelerator

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Date:	Tue, 10 Apr 2012 10:08:59 -0500
From:	Kent Yoder <key@...ux.vnet.ibm.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-crypto@...r.kernel.org, rcj@...ux.vnet.ibm.com,
	key@...ux.vnet.ibm.com, benh@...nel.crashing.org,
	linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 05/17] pseries: Enabled the PFO-based RNG accelerator

This patch adds the cas bits to advertise support for the Platform
Facilities Option (PFO) based random number generator accerator.
The pseries-rng driver provides support for this hardware feature.

Signed-off-by: Robert Jennings <rcj@...ux.vnet.ibm.com>
Signed-off-by: Kent Yoder <key@...ux.vnet.ibm.com>
---
 arch/powerpc/kernel/prom_init.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index 9986027..26f6317 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c
@@ -701,6 +701,7 @@ static void __init early_cmdline_parse(void)
 #define OV5_XCMO			0x00
 #endif
 #define OV5_TYPE1_AFFINITY	0x80	/* Type 1 NUMA affinity */
+#define OV5_PFO_HW_RNG		0x80	/* PFO Random Number Generator */
 
 /* Option Vector 6: IBM PAPR hints */
 #define OV6_LINUX		0x02	/* Linux is our OS */
@@ -748,7 +749,7 @@ static unsigned char ibm_architecture_vec[] = {
 	0,				/* don't halt */
 
 	/* option vector 5: PAPR/OF options */
-	13 - 2,				/* length */
+	18 - 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,
@@ -764,6 +765,11 @@ static unsigned char ibm_architecture_vec[] = {
 	 */
 #define IBM_ARCH_VEC_NRCORES_OFFSET	100
 	W(NR_CPUS),			/* number of cores supported */
+	0,
+	0,
+	0,
+	0,
+	OV5_PFO_HW_RNG,
 
 	/* option vector 6: IBM PAPR hints */
 	4 - 2,				/* length */
-- 
1.7.1


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