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Re: [PATCH v3 2/4] xen: Add files needed for minimal ppc64le build
- To: Shawn Anastasio <shawn@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Wed, 5 Jul 2023 08:44:36 +0200
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- Cc: tpearson@xxxxxxxxxxxxxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Shawn Anastasio <sanastasio@xxxxxxxxxxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Wed, 05 Jul 2023 06:45:00 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 14.06.2023 18:36, Shawn Anastasio wrote:
> On Wed Jun 14, 2023 at 10:51 AM CDT, Jan Beulich wrote:
>> On 13.06.2023 16:50, Shawn Anastasio wrote:
>>> --- /dev/null
>>> +++ b/xen/arch/ppc/arch.mk
>>> @@ -0,0 +1,11 @@
>>> +########################################
>>> +# Power-specific definitions
>>> +
>>> +ppc-march-$(CONFIG_POWER_ISA_2_07B) := power8
>>> +ppc-march-$(CONFIG_POWER_ISA_3_00) := power9
>>> +
>>> +CFLAGS += -mcpu=$(ppc-march-y) -mstrict-align -mcmodel=large -mabi=elfv2
>>> -mno-altivec -mno-vsx
>>
>> Wouldn't it make sense to also pass -mlittle here, such that a tool
>> chain defaulting to big-endian can still be used?
>
> Good call. On this topic, I suppose I'll also add -m64 to allow 32-bit
> toolchains to be used as well.
Turns out this isn't quite enough. When trying to test my little bit of
re-basing of Anthony's series, I ran into ld complaining about little
endian input when the target format is big endian (like for the compiler
I'm using a default configured, i.e. big-endian, binutils build). Looks
like we need to pass "-m elf64lppc" to the linker; I'll see if that
helps (and where exactly to put it).
Jan
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