Re: [PATCH v3 19/39] xen/riscv: detect Shtvala

[Baptiste Le Duc <baptiste.le-duc@xxxxxxxxxx>]

On Wed, 30 Sep 2026 18:23:38 +0200, Oleksii Kurochko 
<oleksii.kurochko@xxxxxxxxx> wrote:
> The H extension allows htval, on a guest-page fault, to be written with
> either the faulting guest physical address or zero. The Shtvala extension
> removes the ambiguity of this zero-write by guaranteeing that htval is
> written with the faulting guest physical address in every circumstance
> permitted by the ISA.
> 
> Not offered to guests: Shtvala describes htval, an HS-mode-only trap
> register a VS-mode guest never touches, and the H extension it belongs to
> is already hidden from guests. The guest-visible equivalent is a
> separate extension, Shvstvala, covering vstval instead.
> 
> [...]

Reviewed-by: Baptiste Le Duc <baptiste.le-duc@xxxxxxxxxx>

-- 
Baptiste Le Duc <baptiste.le-duc@xxxxxxxxxx>