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| author | Benjamin Herrenschmidt <benh@kernel.crashing.org> | 2017-07-19 14:49:46 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-08-03 16:06:52 +1000 |
| commit | 6ff4d3e9665274b69cff47f64cc20183465a1de2 (patch) | |
| tree | 4f3bba88d8edef0e77997a9df8468df74e34e9ac /arch/powerpc/platforms/Kconfig.cputype | |
| parent | 8f5ca0b3195a9afff448004c2141d01a11f481da (diff) | |
| download | linux-6ff4d3e9665274b69cff47f64cc20183465a1de2.tar.bz2 | |
powerpc: Remove old unused icswx based coprocessor support
We have a whole pile of unused code to maintain the ACOP register,
allocate coprocessor PIDs and handle ACOP faults. This mechanism
was used for the HFI adapter on POWER7 which is dead and gone and
whose driver never went upstream. It was used on some A2 core based
stuff that also never saw the light of day.
Take out all that code.
There is still some POWER8 coprocessor code that uses icswx but it's
kernel only and thus doesn't use any of that infrastructure.
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms/Kconfig.cputype')
| -rw-r--r-- | arch/powerpc/platforms/Kconfig.cputype | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype index 2f629e0551e9..9539620a48d4 100644 --- a/arch/powerpc/platforms/Kconfig.cputype +++ b/arch/powerpc/platforms/Kconfig.cputype @@ -271,44 +271,6 @@ config VSX If in doubt, say Y here. -config PPC_ICSWX - bool "Support for PowerPC icswx coprocessor instruction" - depends on PPC_BOOK3S_64 - default n - ---help--- - - This option enables kernel support for the PowerPC Initiate - Coprocessor Store Word (icswx) coprocessor instruction on POWER7 - and POWER8 processors. POWER9 uses new copy/paste instructions - to invoke the coprocessor. - - This option is only useful if you have a processor that supports - the icswx coprocessor instruction. It does not have any effect - on processors without the icswx coprocessor instruction. - - This option slightly increases kernel memory usage. - - If in doubt, say N here. - -config PPC_ICSWX_PID - bool "icswx requires direct PID management" - depends on PPC_ICSWX - default y - ---help--- - The PID register in server is used explicitly for ICSWX. In - embedded systems PID management is done by the system. - -config PPC_ICSWX_USE_SIGILL - bool "Should a bad CT cause a SIGILL?" - depends on PPC_ICSWX - default n - ---help--- - Should a bad CT used for "non-record form ICSWX" cause an - illegal instruction signal or should it be silent as - architected. - - If in doubt, say N here. - config SPE_POSSIBLE def_bool y depends on E200 || (E500 && !PPC_E500MC) |