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authorDavid S. Miller <davem@davemloft.net>2011-07-28 00:06:16 -0400
committerDavid S. Miller <davem@davemloft.net>2011-07-28 01:10:10 -0400
commit4ba991d3eb379fbaa22049e7002341e97a673685 (patch)
tree31671a735930aa2e9e3f13ba31e59236e770c954 /arch/sparc/kernel/pcr.c
parent314ff52727fe94dfbe07f3a9a489ab3ca8d8df5a (diff)
sparc: Detect and handle UltraSPARC-T3 cpu types.
The cpu compatible string we look for is "SPARC-T3". As far as memset/memcpy optimizations go, we treat this chip the same as Niagara-T2/T2+. Use cache initializing stores for memset, and use perfetch, FPU block loads, cache initializing stores, and block stores for copies. We use the Niagara-T2 perf support, since T3 is a close relative in this regard. Later we'll add support for the new events T3 can report, plus enable T3's new "sample" mode. For now I haven't added any new ELF hwcap flags. We probably need to add a couple, for example: T2 and T3 both support the population count instruction in hardware. T3 supports VIS3 instructions, including support (finally) for partitioned shift. One can also now move directly between float and integer registers. T3 supports instructions meant to help with Galois Field and other HPC calculations, such as XOR multiply. Also there are "OP and negate" instructions, for example "fnmul" which is multiply-and-negate. T3 recognizes the transactional memory opcodes, however since transactional memory isn't supported: 1) 'commit' behaves as a NOP and 2) 'chkpt' always branches 3) 'rdcps' returns all zeros and 4) 'wrcps' behaves as a NOP. So we'll need about 3 new elf capability flags in the end to represent all of these things. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'arch/sparc/kernel/pcr.c')
-rw-r--r--arch/sparc/kernel/pcr.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/sparc/kernel/pcr.c b/arch/sparc/kernel/pcr.c
index 878c6824c732..343b0f9e2e7b 100644
--- a/arch/sparc/kernel/pcr.c
+++ b/arch/sparc/kernel/pcr.c
@@ -109,6 +109,10 @@ static int __init register_perf_hsvc(void)
109 perf_hsvc_group = HV_GRP_N2_CPU; 109 perf_hsvc_group = HV_GRP_N2_CPU;
110 break; 110 break;
111 111
112 case SUN4V_CHIP_NIAGARA3:
113 perf_hsvc_group = HV_GRP_KT_CPU;
114 break;
115
112 default: 116 default:
113 return -ENODEV; 117 return -ENODEV;
114 } 118 }