[PATCH 05/17] pseries: Enabled the PFO-based RNG accelerator
From: Kent Yoder <hidden>
Date: 2012-03-21 21:39:13
Also in:
linux-crypto, lkml
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
From: Robert Jennings <redacted> 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 <redacted> Signed-off-by: Kent Yoder <redacted> --- arch/powerpc/kernel/prom_init.c | 13 ++++++++++++- 1 files changed, 12 insertions(+), 1 deletions(-)
diff --git a/arch/powerpc/kernel/prom_init.c b/arch/powerpc/kernel/prom_init.c
index eca626e..6691077 100644
--- a/arch/powerpc/kernel/prom_init.c
+++ b/arch/powerpc/kernel/prom_init.c@@ -710,6 +710,12 @@ static void __init early_cmdline_parse(void) #define OV5_XCMO 0x00 #endif #define OV5_TYPE1_AFFINITY 0x80 /* Type 1 NUMA affinity */ +#if defined(CONFIG_HW_RANDOM_PSERIES) || \ + defined(CONFIG_HW_RANDOM_PSERIES_MODULE) +#define OV5_PFO_HW_RNG 0x80 /* PFO Random Number Generator */ +#else +#define OV5_PFO_HW_RNG 0x00 +#endif /* Option Vector 6: IBM PAPR hints */ #define OV6_LINUX 0x02 /* Linux is our OS */
@@ -757,7 +763,7 @@ 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,
@@ -773,6 +779,11 @@ 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