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| author | Nicholas Piggin <npiggin@gmail.com> | 2022-09-21 03:41:03 +0200 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2022-09-28 11:22:10 +0200 |
| commit | 7fd123e544886bf04fa853869efe55cb3f22d0c0 (patch) | |
| tree | 555194e7b8ac19dfd6350a996cfda0f2a9443493 /Documentation/powerpc | |
| parent | powerpc/64s: Fix GENERIC_CPU build flags for PPC970 / G5 (diff) | |
| download | linux-7fd123e544886bf04fa853869efe55cb3f22d0c0.tar.xz linux-7fd123e544886bf04fa853869efe55cb3f22d0c0.zip | |
powerpc/64s: update cpu selection options
Update the 64s GENERIC_CPU option. POWER4 support has been dropped, so
make that clear in the option name. The POWER5_CPU option is dropped
because it's uncommon, and GENERIC_CPU covers it.
-mtune= before power8 is dropped because the minimum gcc version
supports power8, and tuning is made consistent between big and little
endian.
A 970 option is added for PowerPC 970 / G5 because they still have a
user base, and -mtune=power8 does not generate good code for the 970.
This also updates the ISA versions document to add Power4/Power4+
because I didn't realise Power4+ used 2.01.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Reviewed-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220921014103.587954-2-npiggin@gmail.com
Diffstat (limited to 'Documentation/powerpc')
| -rw-r--r-- | Documentation/powerpc/isa-versions.rst | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/Documentation/powerpc/isa-versions.rst b/Documentation/powerpc/isa-versions.rst index 5592b8899a48..a8d6b6028b3e 100644 --- a/Documentation/powerpc/isa-versions.rst +++ b/Documentation/powerpc/isa-versions.rst @@ -4,6 +4,8 @@ CPU to ISA Version Mapping Mapping of some CPU versions to relevant ISA versions. +Note Power4 and Power4+ are not supported. + ========= ==================================================================== CPU Architecture version ========= ==================================================================== @@ -26,6 +28,12 @@ PPC970 - PowerPC User Instruction Set Architecture Book I v2.01 - PowerPC Virtual Environment Architecture Book II v2.01 - PowerPC Operating Environment Architecture Book III v2.01 - Plus Altivec/VMX ~= 2.03 +Power4+ - PowerPC User Instruction Set Architecture Book I v2.01 + - PowerPC Virtual Environment Architecture Book II v2.01 + - PowerPC Operating Environment Architecture Book III v2.01 +Power4 - PowerPC User Instruction Set Architecture Book I v2.00 + - PowerPC Virtual Environment Architecture Book II v2.00 + - PowerPC Operating Environment Architecture Book III v2.00 ========= ==================================================================== @@ -48,6 +56,8 @@ Power5++ No Power5+ No Power5 No PPC970 Yes +Power4+ No +Power4 No ========== ================== ========== ==== @@ -66,6 +76,8 @@ Power5++ No Power5+ No Power5 No PPC970 No +Power4+ No +Power4 No ========== ==== ========== ==================================== @@ -84,4 +96,6 @@ Power5++ No Power5+ No Power5 No PPC970 No +Power4+ No +Power4 No ========== ==================================== |