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I'm trying to test SVE support on SGI-575 FVP. For this purpose, I've built "sve_array_sum" example with some modifications and I'm having exception with ESR_EL1.EC = 0. I investigated further and found that ID_AA64PFR0_EL1.SVE = 0 which means SVE isn't enabled on this FVP. I know we can enable SVE in FVPs by setting parameter "SVE.ScalableVectorExtension.veclen=<length>" but this parameters doesn't exist on SGI-575 FVP. Do anyone here have any idea about how we can enable SVE support on SGI-575 FVP?
ESR_EL1.EC = 0
ID_AA64PFR0_EL1.SVE = 0
SVE.ScalableVectorExtension.veclen=<length
Hi,
The SVE plugin is available for both FVPs and in the Fast Models product. No special request is needed.
I don't see it in the SGI-575 plugins directory -- probably because it's modeling Cortex-A75.
You may be able to take the plugin from the Armv8-A Architecture FVP as it's included there or just switch over to this FVP.
Thanks,
Jason
I tried to use SVE plugin from "Armv8-A Architecture FVP". For this purpose I downloaded it's latest version (r11p4-37rel0), copied SVE plugin from it to "SGI-575" plugin directory and added plugin in launch command and I got error "Version mismatch - Instruction set extension is 11.4.37 but model is 11.1.31". So, I downloaded an older version (r11p1-27rel1) of "Armv8-A Architecture FVP" and used plugin from it. This time I got no such error but behavior of SGI-575 is still same and it is unable to execute any SVE related instruction and still ID_AA64PFR0_EL1.SVE = 0.
r11p4-37rel0
SGI-575
Version mismatch - Instruction set extension is 11.4.37 but model is 11.1.31
r11p1-27rel1
Sorry I didn't provide enough information.
In order to run SVE the AEMv8-A CPU model is needed. The Armv8-A Base Platform FVP would be the place to start.
https://developer.arm.com/products/system-design/fixed-virtual-platforms
I also tried the SVE plugin on a Cortex-A CPU model and it doesn't report SVE support in the ID_AA64PFR0_EL1 as you said and the SVE instructions do not execute.
Fast Models can be used to modify FVPs and create custom systems using the AEMv8-A model:
https://developer.arm.com/products/system-design/fast-models
If you have more questions about how to create a platform suitable for you work you can also contact the support team at
https://developer.arm.com/support