Since 0069f3d14e7a ("powerpc/64e: Tie PPC_BOOK3E_64 to PPC_E500MC"), the
only possible BOOK3E/64 are E500, so no need of a default CPU over the
E5500.
When the user selects book3e, they must have an e500 compatible
compiler, and it won't work anymore with the default -mcpu=power64, see
commit d6b551b8f90c ("powerpc/64e: Fix build failure with GCC 12
(unrecognized opcode: `wrteei')").
For book3s/64, replace GENERIC_CPU by POWERPC64_CPU to match the PPC32
POWERPC_CPU, and set a default mpcu value in Kconfig directly.
When a user selects a particular CPU, they must ensure the compiler has
the requested capability. Therefore, remove hidden fallback, instead
offer user the possibility to say they want to use the toolchain
default.
Fixes: d6b551b8f90c ("powerpc/64e: Fix build failure with GCC 12 (unrecognized opcode: `wrteei')")
Reported-by: Pali Rohár <[email protected]>
Tested-by: Pali Rohár <[email protected]>
Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/3fd60c2d8a28668a42b766b18362a526ef47e757.1670420281.git.christophe.leroy@csgroup.eu
---
arch/powerpc/Makefile | 22 +++++-----------------
arch/powerpc/platforms/Kconfig.cputype | 12 +++++++-----
2 files changed, 12 insertions(+), 22 deletions(-)
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index dc4cbf0a5ca9..bf5f0a998273 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -146,19 +146,6 @@ CFLAGS-$(CONFIG_PPC32) += $(call cc-option, $(MULTIPLEWORD))
CFLAGS-$(CONFIG_PPC32) += $(call cc-option,-mno-readonly-in-sdata)
-ifdef CONFIG_PPC_BOOK3S_64
-ifdef CONFIG_CPU_LITTLE_ENDIAN
-CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power8
-else
-CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=power4
-endif
-CFLAGS-$(CONFIG_GENERIC_CPU) += $(call cc-option,-mtune=power10, \
- $(call cc-option,-mtune=power9, \
- $(call cc-option,-mtune=power8)))
-else ifdef CONFIG_PPC_BOOK3E_64
-CFLAGS-$(CONFIG_GENERIC_CPU) += -mcpu=powerpc64
-endif
-
ifdef CONFIG_FUNCTION_TRACER
CC_FLAGS_FTRACE := -pg
ifdef CONFIG_MPROFILE_KERNEL
@@ -166,11 +153,12 @@ CC_FLAGS_FTRACE += -mprofile-kernel
endif
endif
-CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
-AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += $(call cc-option,-mcpu=$(CONFIG_TARGET_CPU))
+CFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
+AFLAGS-$(CONFIG_TARGET_CPU_BOOL) += -mcpu=$(CONFIG_TARGET_CPU)
-CFLAGS-$(CONFIG_E5500_CPU) += $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
-CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
+CFLAGS-$(CONFIG_POWERPC64_CPU) += $(call cc-option,-mtune=power10, \
+ $(call cc-option,-mtune=power9, \
+ $(call cc-option,-mtune=power8)))
asinstr := $(call as-instr,lis 9$(comma)foo@high,-DHAVE_AS_ATHIGH=1)
diff --git a/arch/powerpc/platforms/Kconfig.cputype b/arch/powerpc/platforms/Kconfig.cputype
index 9563336e3348..31cea2eeb59e 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -118,19 +118,18 @@ endchoice
choice
prompt "CPU selection"
- default GENERIC_CPU
help
This will create a kernel which is optimised for a particular CPU.
The resulting kernel may not run on other CPUs, so use this with care.
If unsure, select Generic.
-config GENERIC_CPU
+config POWERPC64_CPU
bool "Generic (POWER5 and PowerPC 970 and above)"
depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
select PPC_64S_HASH_MMU
-config GENERIC_CPU
+config POWERPC64_CPU
bool "Generic (POWER8 and above)"
depends on PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
select ARCH_HAS_FAST_MULTIPLIER
@@ -233,13 +232,12 @@ config E500MC_CPU
config TOOLCHAIN_DEFAULT_CPU
bool "Rely on the toolchain's implicit default CPU"
- depends on PPC32
endchoice
config TARGET_CPU_BOOL
bool
- default !GENERIC_CPU && !TOOLCHAIN_DEFAULT_CPU
+ default !TOOLCHAIN_DEFAULT_CPU
config TARGET_CPU
string
@@ -251,6 +249,10 @@ config TARGET_CPU
default "power8" if POWER8_CPU
default "power9" if POWER9_CPU
default "power10" if POWER10_CPU
+ default "e500mc64" if E5500_CPU
+ default "e6500" if E6500_CPU
+ default "power4" if POWERPC64_CPU && !CPU_LITTLE_ENDIAN
+ default "power8" if POWERPC64_CPU && CPU_LITTLE_ENDIAN
default "405" if 405_CPU
default "440" if 440_CPU
default "464" if 464_CPU
--
2.38.1
From: Pali Rohár <[email protected]>
When CONFIG_TARGET_CPU is specified then pass its value to the compiler
-mcpu option. This fixes following build error when building kernel with
powerpc e500 SPE capable cross compilers:
BOOTAS arch/powerpc/boot/crt0.o
powerpc-linux-gnuspe-gcc: error: unrecognized argument in option ‘-mcpu=powerpc’
powerpc-linux-gnuspe-gcc: note: valid arguments to ‘-mcpu=’ are: 8540 8548 native
make[1]: *** [arch/powerpc/boot/Makefile:231: arch/powerpc/boot/crt0.o] Error 1
Similar change was already introduced for the main powerpc Makefile in
commit 446cda1b21d9 ("powerpc/32: Don't always pass -mcpu=powerpc to the
compiler").
Fixes: 40a75584e526 ("powerpc/boot: Build wrapper for an appropriate CPU")
Cc: [email protected] # 446cda1b21d9 ("powerpc/32: Don't always pass -mcpu=powerpc to the compiler")
Signed-off-by: Pali Rohár <[email protected]>
Signed-off-by: Christophe Leroy <[email protected]>
---
arch/powerpc/boot/Makefile | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)
diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
index d32d95aea5d6..295f76df13b5 100644
--- a/arch/powerpc/boot/Makefile
+++ b/arch/powerpc/boot/Makefile
@@ -39,13 +39,19 @@ BOOTCFLAGS := -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
$(LINUXINCLUDE)
ifdef CONFIG_PPC64_BOOT_WRAPPER
-ifdef CONFIG_CPU_LITTLE_ENDIAN
-BOOTCFLAGS += -m64 -mcpu=powerpc64le
+BOOTCFLAGS += -m64
else
-BOOTCFLAGS += -m64 -mcpu=powerpc64
+BOOTCFLAGS += -m32
endif
+
+ifdef CONFIG_TARGET_CPU_BOOL
+BOOTCFLAGS += -mcpu=$(CONFIG_TARGET_CPU)
+else ifdef CONFIG_PPC64_BOOT_WRAPPER
+ifdef CONFIG_CPU_LITTLE_ENDIAN
+BOOTCFLAGS += -mcpu=powerpc64le
else
-BOOTCFLAGS += -m32 -mcpu=powerpc
+BOOTCFLAGS += -mcpu=powerpc64
+endif
endif
BOOTCFLAGS += -isystem $(shell $(BOOTCC) -print-file-name=include)
--
2.38.1
Following build regression started from next-20230131.
Regressions found on powerpc:
build/clang-nightly-tqm8xx_defconfig
build/clang-nightly-ppc64e_defconfig
make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- HOSTCC=clang CC=clang LLVM=1 LLVM_IAS=0 tqm8xx_defconfig
make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- HOSTCC=clang CC=clang LLVM=1 LLVM_IAS=0
error: unknown target CPU '860'
note: valid target CPU values are: generic, 440, 450, 601, 602, 603, 603e, 603ev, 604, 604e, 620, 630, g3, 7400, g4, 7450, g4+, 750, 8548, 970, g5, a2, e500, e500mc, e5500, power3, pwr3, power4, pwr4, power5, pwr5, power5x, pwr5x, power6, pwr6, power6x, pwr6x, power7, pwr7, power8, pwr8, power9, pwr9, power10, pwr10, powerpc, ppc, ppc32, powerpc64, ppc64, powerpc64le, ppc64le, future
make[2]: *** [/builds/linux/scripts/Makefile.build:114: scripts/mod/devicetable-offsets.s] Error 1
error: unknown target CPU '860'
note: valid target CPU values are: generic, 440, 450, 601, 602, 603, 603e, 603ev, 604, 604e, 620, 630, g3, 7400, g4, 7450, g4+, 750, 8548, 970, g5, a2, e500, e500mc, e5500, power3, pwr3, power4, pwr4, power5, pwr5, power5x, pwr5x, power6, pwr6, power6x, pwr6x, power7, pwr7, power8, pwr8, power9, pwr9, power10, pwr10, powerpc, ppc, ppc32, powerpc64, ppc64, powerpc64le, ppc64le, future
make[2]: *** [/builds/linux/scripts/Makefile.build:252: scripts/mod/empty.o] Error 1
Reported-by: Linux Kernel Functional Testing <[email protected]>
https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230201/testrun/14479384/suite/build/test/clang-nightly-tqm8xx_defconfig/history/
The bisection pointed to this commit,
45f7091aac35 ("powerpc/64: Set default CPU in Kconfig")
--
Linaro LKFT
https://lkft.linaro.org
Le 01/02/2023 à 12:31, Naresh Kamboju a écrit :
> Following build regression started from next-20230131.
>
> Regressions found on powerpc:
>
> build/clang-nightly-tqm8xx_defconfig
> build/clang-nightly-ppc64e_defconfig
>
>
> make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- HOSTCC=clang CC=clang LLVM=1 LLVM_IAS=0 tqm8xx_defconfig
> make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- HOSTCC=clang CC=clang LLVM=1 LLVM_IAS=0
>
> error: unknown target CPU '860'
> note: valid target CPU values are: generic, 440, 450, 601, 602, 603, 603e, 603ev, 604, 604e, 620, 630, g3, 7400, g4, 7450, g4+, 750, 8548, 970, g5, a2, e500, e500mc, e5500, power3, pwr3, power4, pwr4, power5, pwr5, power5x, pwr5x, power6, pwr6, power6x, pwr6x, power7, pwr7, power8, pwr8, power9, pwr9, power10, pwr10, powerpc, ppc, ppc32, powerpc64, ppc64, powerpc64le, ppc64le, future
> make[2]: *** [/builds/linux/scripts/Makefile.build:114: scripts/mod/devicetable-offsets.s] Error 1
> error: unknown target CPU '860'
> note: valid target CPU values are: generic, 440, 450, 601, 602, 603, 603e, 603ev, 604, 604e, 620, 630, g3, 7400, g4, 7450, g4+, 750, 8548, 970, g5, a2, e500, e500mc, e5500, power3, pwr3, power4, pwr4, power5, pwr5, power5x, pwr5x, power6, pwr6, power6x, pwr6x, power7, pwr7, power8, pwr8, power9, pwr9, power10, pwr10, powerpc, ppc, ppc32, powerpc64, ppc64, powerpc64le, ppc64le, future
> make[2]: *** [/builds/linux/scripts/Makefile.build:252: scripts/mod/empty.o] Error 1
On GCC, the possible values are:
ppc-linux-gcc: note : valid arguments to ‘-mcpu=’ are: 401 403 405 405fp
440 440fp 464 464fp 476 476fp 505 601 602 603 603e 604 604e 620 630 740
7400 7450 750 801 821 823 8540 8548 860 970 G3 G4 G5 a2 cell e300c2
e300c3 e500mc e500mc64 e5500 e6500 ec603e native power3 power4 power5
power5+ power6 power6x power7 power8 powerpc powerpc64 powerpc64le rs64
titan
How do you tell CLANG that you are building for powerpc 8xx ?
>
>
> Reported-by: Linux Kernel Functional Testing <[email protected]>
>
> https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230201/testrun/14479384/suite/build/test/clang-nightly-tqm8xx_defconfig/history/
>
> The bisection pointed to this commit,
> 45f7091aac35 ("powerpc/64: Set default CPU in Kconfig")
>
> --
> Linaro LKFT
> https://lkft.linaro.org
On Wed, Feb 1, 2023 at 3:41 AM Christophe Leroy
<[email protected]> wrote:
>
>
>
> Le 01/02/2023 à 12:31, Naresh Kamboju a écrit :
> > Following build regression started from next-20230131.
> >
> > Regressions found on powerpc:
> >
> > build/clang-nightly-tqm8xx_defconfig
> > build/clang-nightly-ppc64e_defconfig
> >
> >
> > make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- HOSTCC=clang CC=clang LLVM=1 LLVM_IAS=0 tqm8xx_defconfig
> > make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- HOSTCC=clang CC=clang LLVM=1 LLVM_IAS=0
> >
> > error: unknown target CPU '860'
> > note: valid target CPU values are: generic, 440, 450, 601, 602, 603, 603e, 603ev, 604, 604e, 620, 630, g3, 7400, g4, 7450, g4+, 750, 8548, 970, g5, a2, e500, e500mc, e5500, power3, pwr3, power4, pwr4, power5, pwr5, power5x, pwr5x, power6, pwr6, power6x, pwr6x, power7, pwr7, power8, pwr8, power9, pwr9, power10, pwr10, powerpc, ppc, ppc32, powerpc64, ppc64, powerpc64le, ppc64le, future
> > make[2]: *** [/builds/linux/scripts/Makefile.build:114: scripts/mod/devicetable-offsets.s] Error 1
> > error: unknown target CPU '860'
> > note: valid target CPU values are: generic, 440, 450, 601, 602, 603, 603e, 603ev, 604, 604e, 620, 630, g3, 7400, g4, 7450, g4+, 750, 8548, 970, g5, a2, e500, e500mc, e5500, power3, pwr3, power4, pwr4, power5, pwr5, power5x, pwr5x, power6, pwr6, power6x, pwr6x, power7, pwr7, power8, pwr8, power9, pwr9, power10, pwr10, powerpc, ppc, ppc32, powerpc64, ppc64, powerpc64le, ppc64le, future
> > make[2]: *** [/builds/linux/scripts/Makefile.build:252: scripts/mod/empty.o] Error 1
>
>
> On GCC, the possible values are:
>
> ppc-linux-gcc: note : valid arguments to ‘-mcpu=’ are: 401 403 405 405fp
> 440 440fp 464 464fp 476 476fp 505 601 602 603 603e 604 604e 620 630 740
> 7400 7450 750 801 821 823 8540 8548 860 970 G3 G4 G5 a2 cell e300c2
> e300c3 e500mc e500mc64 e5500 e6500 ec603e native power3 power4 power5
> power5+ power6 power6x power7 power8 powerpc powerpc64 powerpc64le rs64
> titan
>
> How do you tell CLANG that you are building for powerpc 8xx ?
+ Nemanjai, Qiongsi,
>
> >
> >
> > Reported-by: Linux Kernel Functional Testing <[email protected]>
> >
> > https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230201/testrun/14479384/suite/build/test/clang-nightly-tqm8xx_defconfig/history/
> >
> > The bisection pointed to this commit,
> > 45f7091aac35 ("powerpc/64: Set default CPU in Kconfig")
> >
> > --
> > Linaro LKFT
> > https://lkft.linaro.org
--
Thanks,
~Nick Desaulniers
On Wednesday 01 February 2023 09:29:45 Nick Desaulniers wrote:
> On Wed, Feb 1, 2023 at 3:41 AM Christophe Leroy
> <[email protected]> wrote:
> >
> >
> >
> > Le 01/02/2023 à 12:31, Naresh Kamboju a écrit :
> > > Following build regression started from next-20230131.
> > >
> > > Regressions found on powerpc:
> > >
> > > build/clang-nightly-tqm8xx_defconfig
> > > build/clang-nightly-ppc64e_defconfig
> > >
> > >
> > > make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- HOSTCC=clang CC=clang LLVM=1 LLVM_IAS=0 tqm8xx_defconfig
> > > make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- HOSTCC=clang CC=clang LLVM=1 LLVM_IAS=0
> > >
> > > error: unknown target CPU '860'
> > > note: valid target CPU values are: generic, 440, 450, 601, 602, 603, 603e, 603ev, 604, 604e, 620, 630, g3, 7400, g4, 7450, g4+, 750, 8548, 970, g5, a2, e500, e500mc, e5500, power3, pwr3, power4, pwr4, power5, pwr5, power5x, pwr5x, power6, pwr6, power6x, pwr6x, power7, pwr7, power8, pwr8, power9, pwr9, power10, pwr10, powerpc, ppc, ppc32, powerpc64, ppc64, powerpc64le, ppc64le, future
> > > make[2]: *** [/builds/linux/scripts/Makefile.build:114: scripts/mod/devicetable-offsets.s] Error 1
> > > error: unknown target CPU '860'
> > > note: valid target CPU values are: generic, 440, 450, 601, 602, 603, 603e, 603ev, 604, 604e, 620, 630, g3, 7400, g4, 7450, g4+, 750, 8548, 970, g5, a2, e500, e500mc, e5500, power3, pwr3, power4, pwr4, power5, pwr5, power5x, pwr5x, power6, pwr6, power6x, pwr6x, power7, pwr7, power8, pwr8, power9, pwr9, power10, pwr10, powerpc, ppc, ppc32, powerpc64, ppc64, powerpc64le, ppc64le, future
> > > make[2]: *** [/builds/linux/scripts/Makefile.build:252: scripts/mod/empty.o] Error 1
> >
> >
> > On GCC, the possible values are:
> >
> > ppc-linux-gcc: note : valid arguments to ‘-mcpu=’ are: 401 403 405 405fp
> > 440 440fp 464 464fp 476 476fp 505 601 602 603 603e 604 604e 620 630 740
> > 7400 7450 750 801 821 823 8540 8548 860 970 G3 G4 G5 a2 cell e300c2
> > e300c3 e500mc e500mc64 e5500 e6500 ec603e native power3 power4 power5
> > power5+ power6 power6x power7 power8 powerpc powerpc64 powerpc64le rs64
> > titan
> >
> > How do you tell CLANG that you are building for powerpc 8xx ?
Maybe llvm does not have support for this old CPU core at all? Because
from 'note: valid target CPU values are:' message it looks like that.
> + Nemanjai, Qiongsi,
>
>
> >
> > >
> > >
> > > Reported-by: Linux Kernel Functional Testing <[email protected]>
> > >
> > > https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230201/testrun/14479384/suite/build/test/clang-nightly-tqm8xx_defconfig/history/
> > >
> > > The bisection pointed to this commit,
> > > 45f7091aac35 ("powerpc/64: Set default CPU in Kconfig")
> > >
> > > --
> > > Linaro LKFT
> > > https://lkft.linaro.org
>
>
>
> --
> Thanks,
> ~Nick Desaulniers
Le 03/02/2023 à 18:58, Pali Rohár a écrit :
> On Wednesday 01 February 2023 09:29:45 Nick Desaulniers wrote:
>> On Wed, Feb 1, 2023 at 3:41 AM Christophe Leroy
>> <[email protected]> wrote:
>>>
>>>
>>>
>>> Le 01/02/2023 à 12:31, Naresh Kamboju a écrit :
>>>> Following build regression started from next-20230131.
>>>>
>>>> Regressions found on powerpc:
>>>>
>>>> build/clang-nightly-tqm8xx_defconfig
>>>> build/clang-nightly-ppc64e_defconfig
>>>>
>>>>
>>>> make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- HOSTCC=clang CC=clang LLVM=1 LLVM_IAS=0 tqm8xx_defconfig
>>>> make --silent --keep-going --jobs=8 O=/home/tuxbuild/.cache/tuxmake/builds/1/build ARCH=powerpc CROSS_COMPILE=powerpc64le-linux-gnu- HOSTCC=clang CC=clang LLVM=1 LLVM_IAS=0
>>>>
>>>> error: unknown target CPU '860'
>>>> note: valid target CPU values are: generic, 440, 450, 601, 602, 603, 603e, 603ev, 604, 604e, 620, 630, g3, 7400, g4, 7450, g4+, 750, 8548, 970, g5, a2, e500, e500mc, e5500, power3, pwr3, power4, pwr4, power5, pwr5, power5x, pwr5x, power6, pwr6, power6x, pwr6x, power7, pwr7, power8, pwr8, power9, pwr9, power10, pwr10, powerpc, ppc, ppc32, powerpc64, ppc64, powerpc64le, ppc64le, future
>>>> make[2]: *** [/builds/linux/scripts/Makefile.build:114: scripts/mod/devicetable-offsets.s] Error 1
>>>> error: unknown target CPU '860'
>>>> note: valid target CPU values are: generic, 440, 450, 601, 602, 603, 603e, 603ev, 604, 604e, 620, 630, g3, 7400, g4, 7450, g4+, 750, 8548, 970, g5, a2, e500, e500mc, e5500, power3, pwr3, power4, pwr4, power5, pwr5, power5x, pwr5x, power6, pwr6, power6x, pwr6x, power7, pwr7, power8, pwr8, power9, pwr9, power10, pwr10, powerpc, ppc, ppc32, powerpc64, ppc64, powerpc64le, ppc64le, future
>>>> make[2]: *** [/builds/linux/scripts/Makefile.build:252: scripts/mod/empty.o] Error 1
>>>
>>>
>>> On GCC, the possible values are:
>>>
>>> ppc-linux-gcc: note : valid arguments to ‘-mcpu=’ are: 401 403 405 405fp
>>> 440 440fp 464 464fp 476 476fp 505 601 602 603 603e 604 604e 620 630 740
>>> 7400 7450 750 801 821 823 8540 8548 860 970 G3 G4 G5 a2 cell e300c2
>>> e300c3 e500mc e500mc64 e5500 e6500 ec603e native power3 power4 power5
>>> power5+ power6 power6x power7 power8 powerpc powerpc64 powerpc64le rs64
>>> titan
>>>
>>> How do you tell CLANG that you are building for powerpc 8xx ?
>
> Maybe llvm does not have support for this old CPU core at all? Because
> from 'note: valid target CPU values are:' message it looks like that.
By the way I submitted a patch to opt out of CLANG until we clarify the
situation, see
https://patchwork.ozlabs.org/project/linuxppc-dev/patch/e62892e32c14a7a5738c597e39e0082cb0abf21c.1675335659.git.christophe.leroy@csgroup.eu/
Christophe
>
>> + Nemanjai, Qiongsi,
>>
>>
>>>
>>>>
>>>>
>>>> Reported-by: Linux Kernel Functional Testing <[email protected]>
>>>>
>>>> https://qa-reports.linaro.org/lkft/linux-next-master/build/next-20230201/testrun/14479384/suite/build/test/clang-nightly-tqm8xx_defconfig/history/
>>>>
>>>> The bisection pointed to this commit,
>>>> 45f7091aac35 ("powerpc/64: Set default CPU in Kconfig")
>>>>
>>>> --
>>>> Linaro LKFT
>>>> https://lkft.linaro.org
>>
>>
>>
>> --
>> Thanks,
>> ~Nick Desaulniers