Re: [PATCH RFC 2/3] riscv: Add Svukte extension support

[Deepak Gupta]

On Fri, Sep 20, 2024 at 03:39:04PM +0800, Max Hsu wrote:
> Svukte extension introduce senvcfg.UKTE, hstatus.HUKTE.
>
> This patch add CSR bit definition, and detects if Svukte ISA extension
> is available, cpufeature will set the correspond bit field so the
> svukte-qualified memory accesses are protected in a manner that is
> timing-independent of the faulting virtual address.
>
> Since hstatus.HU is not enabled by linux, enabling hstatus.HUKTE will
> not be affective.
>
> This patch depends on patch "riscv: Per-thread envcfg CSR support" [1]
>
> Link: https://lore.kernel.org/linux-riscv/20240814081126.956287-1-samuel.holland@xxxxxxxxxx/ [1]
>
> Reviewed-by: Samuel Holland <samuel.holland@xxxxxxxxxx>
> Signed-off-by: Max Hsu <max.hsu@xxxxxxxxxx>
> ---
> arch/riscv/include/asm/csr.h   | 2 ++
> arch/riscv/include/asm/hwcap.h | 1 +
> arch/riscv/kernel/cpufeature.c | 4 ++++
> 3 files changed, 7 insertions(+)

Reviewed-by: Deepak Gupta <debug@xxxxxxxxxxxx>