Re: [PATCH 1/7] RISC-V: Detect XVentanaCondOps from ISA string

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On Mon, Oct 2, 2023 at 11:57 AM Christoph Hellwig <hch@xxxxxxxxxxxxx> wrote:
>
> On Tue, Sep 19, 2023 at 09:23:37AM +0530, Anup Patel wrote:
> > The Veyron-V1 CPU supports custom conditional arithmetic and
> > conditional-select/move operations referred to as XVentanaCondOps
> > extension. In fact, QEMU RISC-V also has support for emulating
> > XVentanaCondOps extension.
> >
> > Let us detect XVentanaCondOps extension from ISA string available
> > through DT or ACPI.
>
> Umm, I though Linux/riscv would never support vendor specific
> extensions?
>

We already have few T-Head specific extensions so Linux RISC-V
does allow vendor extensions.

Regards,
Anup





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