Re: [RFC PATCH 0/5] gdb/aarch64: Support for FPMR

[Thiago Jung Bauermann <thiago.bauermann@linaro.org>]

Hello Ezra,

Thank you for these patches.

<Ezra.Sitorus@arm.com> writes:

> From: Ezra Sitorus <ezra.sitorus@arm.com>
>
> The Floating Point Mode Register (FPMR) determines the behaviour of FP8
> instructions. This patch series adds support for this register into gdb.
>
> This has been tested using Shrinkwrap, which allows me to run Linux on a
> model of an Arm system with new features. You can find more information
> here: [1].

Is there something specific one has to do to enable FPMR on
Shrinkwrap/FVP?

I tried building an Armv9.5 configuration:

$ shrinkwrap build --overlay=arch/v9.5.yaml ns-edk2.yaml

and then running it with upstream kernel v6.16-rc7 which I think should
support FPMR, but AT_HWCAP doesn't have the FPMR bit set, and the test
program from the allow_aarch64_fpmr_tests procedure gets a SIGILL so the
testcases in this series report unsupported.

-- 
Thiago