With GCC 12, corenet64_smp_defconfig leads to the following build errors:
CC arch/powerpc/kernel/irq.o
{standard input}: Assembler messages:
{standard input}:3616: Error: unrecognized opcode: `wrteei'
{standard input}:5689: Error: unrecognized opcode: `wrteei'
CC arch/powerpc/kernel/pmc.o
{standard input}: Assembler messages:
{standard input}:42: Error: unrecognized opcode: `mfpmr'
{standard input}:53: Error: unrecognized opcode: `mtpmr'
CC arch/powerpc/kernel/io.o
{standard input}: Assembler messages:
{standard input}:376: Error: unrecognized opcode: `mbar'
...
CC arch/powerpc/mm/nohash/book3e_hugetlbpage.o
{standard input}: Assembler messages:
{standard input}:291: Error: unrecognized opcode: `tlbsx'
{standard input}:482: Error: unrecognized opcode: `tlbwe'
{standard input}:608: Error: unrecognized opcode: `lbarx'
{standard input}:608: Error: unrecognized opcode: `stbcx.'
-mpcu=powerpc64 cannot be used anymore for book3e, it must be a booke CPU.
But then we get:
CC arch/powerpc/lib/xor_vmx.o
cc1: error: AltiVec not supported in this target
Altivec is not supported with -mcpu=e5500 so don't allow selection
of altivec when e5500 is selected.
Signed-off-by: Christophe Leroy <[email protected]>
---
arch/powerpc/Makefile | 8 +-------
arch/powerpc/platforms/Kconfig.cputype | 8 ++++----
2 files changed, 5 insertions(+), 11 deletions(-)
diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
index d54e1fe03551..02742facf895 100644
--- a/arch/powerpc/Makefile
+++ b/arch/powerpc/Makefile
@@ -168,13 +168,7 @@ 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))
-# Altivec option not allowed with e500mc64 in GCC.
-ifdef CONFIG_ALTIVEC
-E5500_CPU := -mcpu=powerpc64
-else
-E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
-endif
-CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
+CFLAGS-$(CONFIG_E5500_CPU) += $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
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 3cc8452b8660..5185d942b455 100644
--- a/arch/powerpc/platforms/Kconfig.cputype
+++ b/arch/powerpc/platforms/Kconfig.cputype
@@ -126,12 +126,12 @@ choice
config GENERIC_CPU
bool "Generic (POWER4 and above)"
- depends on PPC64 && !CPU_LITTLE_ENDIAN
- select PPC_64S_HASH_MMU if PPC_BOOK3S_64
+ depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
+ select PPC_64S_HASH_MMU
config GENERIC_CPU
bool "Generic (POWER8 and above)"
- depends on PPC64 && CPU_LITTLE_ENDIAN
+ depends on PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
select ARCH_HAS_FAST_MULTIPLIER
select PPC_64S_HASH_MMU
@@ -358,7 +358,7 @@ config PHYS_64BIT
config ALTIVEC
bool "AltiVec Support"
- depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
+ depends on PPC_BOOK3S || (PPC_E500MC && PPC64 && !E5500_CPU)
select PPC_FPU
help
This option enables kernel support for the Altivec extensions to the
--
2.36.1
On Monday 11 July 2022 16:19:33 Christophe Leroy wrote:
> With GCC 12, corenet64_smp_defconfig leads to the following build errors:
>
> CC arch/powerpc/kernel/irq.o
> {standard input}: Assembler messages:
> {standard input}:3616: Error: unrecognized opcode: `wrteei'
> {standard input}:5689: Error: unrecognized opcode: `wrteei'
> CC arch/powerpc/kernel/pmc.o
> {standard input}: Assembler messages:
> {standard input}:42: Error: unrecognized opcode: `mfpmr'
> {standard input}:53: Error: unrecognized opcode: `mtpmr'
> CC arch/powerpc/kernel/io.o
> {standard input}: Assembler messages:
> {standard input}:376: Error: unrecognized opcode: `mbar'
> ...
> CC arch/powerpc/mm/nohash/book3e_hugetlbpage.o
> {standard input}: Assembler messages:
> {standard input}:291: Error: unrecognized opcode: `tlbsx'
> {standard input}:482: Error: unrecognized opcode: `tlbwe'
> {standard input}:608: Error: unrecognized opcode: `lbarx'
> {standard input}:608: Error: unrecognized opcode: `stbcx.'
>
> -mpcu=powerpc64 cannot be used anymore for book3e, it must be a booke CPU.
>
> But then we get:
>
> CC arch/powerpc/lib/xor_vmx.o
> cc1: error: AltiVec not supported in this target
>
> Altivec is not supported with -mcpu=e5500 so don't allow selection
> of altivec when e5500 is selected.
>
> Signed-off-by: Christophe Leroy <[email protected]>
> ---
> arch/powerpc/Makefile | 8 +-------
> arch/powerpc/platforms/Kconfig.cputype | 8 ++++----
> 2 files changed, 5 insertions(+), 11 deletions(-)
>
> diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
> index d54e1fe03551..02742facf895 100644
> --- a/arch/powerpc/Makefile
> +++ b/arch/powerpc/Makefile
> @@ -168,13 +168,7 @@ 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))
>
> -# Altivec option not allowed with e500mc64 in GCC.
> -ifdef CONFIG_ALTIVEC
> -E5500_CPU := -mcpu=powerpc64
> -else
> -E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
> -endif
> -CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
> +CFLAGS-$(CONFIG_E5500_CPU) += $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
> CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
Hello! I think that there is an issue. After removal of E5500_CPU
variable few line above, it cannot be used in CFLAGS-$(CONFIG_E6500_CPU)
assignment, because it is empty.
>
> 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 3cc8452b8660..5185d942b455 100644
> --- a/arch/powerpc/platforms/Kconfig.cputype
> +++ b/arch/powerpc/platforms/Kconfig.cputype
> @@ -126,12 +126,12 @@ choice
>
> config GENERIC_CPU
> bool "Generic (POWER4 and above)"
> - depends on PPC64 && !CPU_LITTLE_ENDIAN
> - select PPC_64S_HASH_MMU if PPC_BOOK3S_64
> + depends on PPC_BOOK3S_64 && !CPU_LITTLE_ENDIAN
> + select PPC_64S_HASH_MMU
>
> config GENERIC_CPU
> bool "Generic (POWER8 and above)"
> - depends on PPC64 && CPU_LITTLE_ENDIAN
> + depends on PPC_BOOK3S_64 && CPU_LITTLE_ENDIAN
> select ARCH_HAS_FAST_MULTIPLIER
> select PPC_64S_HASH_MMU
>
> @@ -358,7 +358,7 @@ config PHYS_64BIT
>
> config ALTIVEC
> bool "AltiVec Support"
> - depends on PPC_BOOK3S_32 || PPC_BOOK3S_64 || (PPC_E500MC && PPC64)
> + depends on PPC_BOOK3S || (PPC_E500MC && PPC64 && !E5500_CPU)
> select PPC_FPU
> help
> This option enables kernel support for the Altivec extensions to the
> --
> 2.36.1
>
Le 11/12/2022 à 18:32, Pali Rohár a écrit :
> On Monday 11 July 2022 16:19:33 Christophe Leroy wrote:
>> With GCC 12, corenet64_smp_defconfig leads to the following build errors:
>>
>> CC arch/powerpc/kernel/irq.o
>> {standard input}: Assembler messages:
>> {standard input}:3616: Error: unrecognized opcode: `wrteei'
>> {standard input}:5689: Error: unrecognized opcode: `wrteei'
>> CC arch/powerpc/kernel/pmc.o
>> {standard input}: Assembler messages:
>> {standard input}:42: Error: unrecognized opcode: `mfpmr'
>> {standard input}:53: Error: unrecognized opcode: `mtpmr'
>> CC arch/powerpc/kernel/io.o
>> {standard input}: Assembler messages:
>> {standard input}:376: Error: unrecognized opcode: `mbar'
>> ...
>> CC arch/powerpc/mm/nohash/book3e_hugetlbpage.o
>> {standard input}: Assembler messages:
>> {standard input}:291: Error: unrecognized opcode: `tlbsx'
>> {standard input}:482: Error: unrecognized opcode: `tlbwe'
>> {standard input}:608: Error: unrecognized opcode: `lbarx'
>> {standard input}:608: Error: unrecognized opcode: `stbcx.'
>>
>> -mpcu=powerpc64 cannot be used anymore for book3e, it must be a booke CPU.
>>
>> But then we get:
>>
>> CC arch/powerpc/lib/xor_vmx.o
>> cc1: error: AltiVec not supported in this target
>>
>> Altivec is not supported with -mcpu=e5500 so don't allow selection
>> of altivec when e5500 is selected.
>>
>> Signed-off-by: Christophe Leroy <[email protected]>
>> ---
>> arch/powerpc/Makefile | 8 +-------
>> arch/powerpc/platforms/Kconfig.cputype | 8 ++++----
>> 2 files changed, 5 insertions(+), 11 deletions(-)
>>
>> diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
>> index d54e1fe03551..02742facf895 100644
>> --- a/arch/powerpc/Makefile
>> +++ b/arch/powerpc/Makefile
>> @@ -168,13 +168,7 @@ 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))
>>
>> -# Altivec option not allowed with e500mc64 in GCC.
>> -ifdef CONFIG_ALTIVEC
>> -E5500_CPU := -mcpu=powerpc64
>> -else
>> -E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
>> -endif
>> -CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
>> +CFLAGS-$(CONFIG_E5500_CPU) += $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
>> CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
>
> Hello! I think that there is an issue. After removal of E5500_CPU
> variable few line above, it cannot be used in CFLAGS-$(CONFIG_E6500_CPU)
> assignment, because it is empty.
>
Ah yes, you are right.
It should be fixed by
https://github.com/linuxppc/linux/commit/f2636eaac7dee1d7d096cc115ff4f5111b0c508c
Michael, I see the patch is in next-test. Can you add:
Fixes: d6b551b8f90c ("powerpc/64e: Fix build failure with GCC 12
(unrecognized opcode: `wrteei')")
Thanks
Christophe
Christophe Leroy <[email protected]> writes:
> Le 11/12/2022 à 18:32, Pali Rohár a écrit :
>> On Monday 11 July 2022 16:19:33 Christophe Leroy wrote:
>>> With GCC 12, corenet64_smp_defconfig leads to the following build errors:
>>>
>>> CC arch/powerpc/kernel/irq.o
>>> {standard input}: Assembler messages:
>>> {standard input}:3616: Error: unrecognized opcode: `wrteei'
>>> {standard input}:5689: Error: unrecognized opcode: `wrteei'
>>> CC arch/powerpc/kernel/pmc.o
>>> {standard input}: Assembler messages:
>>> {standard input}:42: Error: unrecognized opcode: `mfpmr'
>>> {standard input}:53: Error: unrecognized opcode: `mtpmr'
>>> CC arch/powerpc/kernel/io.o
>>> {standard input}: Assembler messages:
>>> {standard input}:376: Error: unrecognized opcode: `mbar'
>>> ...
>>> CC arch/powerpc/mm/nohash/book3e_hugetlbpage.o
>>> {standard input}: Assembler messages:
>>> {standard input}:291: Error: unrecognized opcode: `tlbsx'
>>> {standard input}:482: Error: unrecognized opcode: `tlbwe'
>>> {standard input}:608: Error: unrecognized opcode: `lbarx'
>>> {standard input}:608: Error: unrecognized opcode: `stbcx.'
>>>
>>> -mpcu=powerpc64 cannot be used anymore for book3e, it must be a booke CPU.
>>>
>>> But then we get:
>>>
>>> CC arch/powerpc/lib/xor_vmx.o
>>> cc1: error: AltiVec not supported in this target
>>>
>>> Altivec is not supported with -mcpu=e5500 so don't allow selection
>>> of altivec when e5500 is selected.
>>>
>>> Signed-off-by: Christophe Leroy <[email protected]>
>>> ---
>>> arch/powerpc/Makefile | 8 +-------
>>> arch/powerpc/platforms/Kconfig.cputype | 8 ++++----
>>> 2 files changed, 5 insertions(+), 11 deletions(-)
>>>
>>> diff --git a/arch/powerpc/Makefile b/arch/powerpc/Makefile
>>> index d54e1fe03551..02742facf895 100644
>>> --- a/arch/powerpc/Makefile
>>> +++ b/arch/powerpc/Makefile
>>> @@ -168,13 +168,7 @@ 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))
>>>
>>> -# Altivec option not allowed with e500mc64 in GCC.
>>> -ifdef CONFIG_ALTIVEC
>>> -E5500_CPU := -mcpu=powerpc64
>>> -else
>>> -E5500_CPU := $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
>>> -endif
>>> -CFLAGS-$(CONFIG_E5500_CPU) += $(E5500_CPU)
>>> +CFLAGS-$(CONFIG_E5500_CPU) += $(call cc-option,-mcpu=e500mc64,-mcpu=powerpc64)
>>> CFLAGS-$(CONFIG_E6500_CPU) += $(call cc-option,-mcpu=e6500,$(E5500_CPU))
>>
>> Hello! I think that there is an issue. After removal of E5500_CPU
>> variable few line above, it cannot be used in CFLAGS-$(CONFIG_E6500_CPU)
>> assignment, because it is empty.
>>
>
> Ah yes, you are right.
>
> It should be fixed by
> https://github.com/linuxppc/linux/commit/f2636eaac7dee1d7d096cc115ff4f5111b0c508c
>
> Michael, I see the patch is in next-test. Can you add:
>
> Fixes: d6b551b8f90c ("powerpc/64e: Fix build failure with GCC 12
> (unrecognized opcode: `wrteei')")
Yep, will do.
cheers