linux_dsm_epyc7002/arch/sparc
David S. Miller 4ba991d3eb 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>
2011-07-27 22:10:10 -07:00
..
boot sparc32: added U-Boot build target: uImage 2011-03-16 18:19:04 -07:00
configs defconfig reduction 2010-08-14 22:26:53 +02:00
include/asm sparc: Detect and handle UltraSPARC-T3 cpu types. 2011-07-27 22:10:10 -07:00
kernel sparc: Detect and handle UltraSPARC-T3 cpu types. 2011-07-27 22:10:10 -07:00
lib sparc: rename atomic_add_unless 2011-07-27 12:53:36 -07:00
math-emu perf: Remove the nmi parameter from the swevent and overflow interface 2011-07-01 11:06:35 +02:00
mm sparc64: implement get_user_pages_fast() 2011-07-25 20:57:10 -07:00
oprofile sparc: using HZ needs an include of linux/param.h 2009-10-05 00:46:08 -07:00
prom sparc: Remove unnecessary semicolons 2011-06-07 16:06:34 -07:00
Kconfig sparc64: use RCU page table freeing 2011-07-25 20:57:10 -07:00
Kconfig.debug lib: consolidate DEBUG_STACK_USAGE option 2011-05-25 08:39:54 -07:00
Makefile sparc32: added U-Boot build target: uImage 2011-03-16 18:19:04 -07:00