Re: [PATCH v9 14/26] riscv/traps: Introduce software check exception

Hi Clement,

Thanks for looking at it. Inline On Thu, Feb 06, 2025 at 02:49:09PM +0100, Clément Léger wrote:

On 05/02/2025 02:22, Deepak Gupta wrote:

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zicfiss / zicfilp introduces a new exception to priv isa `software check exception` with cause code = 18. This patch implements software check exception.

Hey Deepak,

While not directly related to this patch, is the exception 18 delegation documented in the SBI doc ? I mean, should we specify that it is always delegated when implementing FWFT LANDING_PAD/SHADOW_STACK ?

I don't think it's document in SBI spec anywhere. Should it be ?

In code, opensbi delegates the exception (SW_CHECK) https://github.com/riscv-software-src/opensbi/commit/110524441a827e026db3547...

Thanks,

Clément

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