gcc-8: arm64/kvm/pauth.: Error: unknown architectural extension `pauth'

[Arnd Bergmann]

On Mon, Apr 22, 2024, at 11:13, Mark Rutland wrote:
> On Mon, Apr 22, 2024 at 02:04:43PM +0530, Naresh Kamboju wrote:
> Given the minimum supported toolchain comes with an assembler that doesn't
> necessarily support ARMv8.3, I reckon we'll either have to make NV pauth
> support depend upon AS_HAS_ARMV8_3, or manually assemble the PACGA instruction.
>
> I suspect the latter is the better option.

The .config linked from the report shows

CONFIG_AS_VERSION=23101
CONFIG_ARM64_PTR_AUTH_KERNEL=y
CONFIG_AS_HAS_ARMV8_3=y

So it gets detected as supporting ARMv8.3. Is this the wrong
conditional to check, or does it get misdetected for an unsupported
assembler?

     Arnd