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powerpc/pseries: Enable the PFO-based RNG accelerator

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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@linux.vnet.ibm.com>
Signed-off-by: Kent Yoder <key@linux.vnet.ibm.com>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Kent Yoder 2012-04-12 05:17:51 +00:00 committed by Benjamin Herrenschmidt
parent 649e9ea0ab
commit 828d2b5971
1 changed files with 7 additions and 1 deletions
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8
arch/powerpc/kernel/prom_init.c
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@ -704,6 +704,7 @@ 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 */
@ -752,7 +753,7 @@ static unsigned char ibm_architecture_vec[] = {
OV4_MIN_ENT_CAP, /* minimum VP entitled capacity */
/* 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,
@ -768,6 +769,11 @@ static unsigned char ibm_architecture_vec[] = {
*/
#define IBM_ARCH_VEC_NRCORES_OFFSET 101
W(NR_CPUS), /* number of cores supported */
0,
0,
0,
0,
OV5_PFO_HW_RNG,
/* option vector 6: IBM PAPR hints */
4 - 2, /* length */