Re: [PATCH 0/3] riscv: Per-thread envcfg CSR support

[Deepak Gupta]

Hi Samuel,

Thanks for working on these.
Patches looks good to me. I've given some suggestion for patch organization
and squashing. You can take it or leave it.

Other than that.

Reviewed-By: Deepak Gupta <debug@xxxxxxxxxxxx>

On Wed, Jun 05, 2024 at 01:56:44PM -0700, Samuel Holland wrote:
> This series (or equivalent) is a prerequisite for both user-mode pointer
> masking and CFI support, as those are per-thread features are controlled
> by fields in the envcfg CSR. These patches are based on v1 of the
> pointer masking series[1], with significant input from both Deepak and
> Andrew. By sending this as a separate series, hopefully we can converge
> on a single implementation of this functionality.
>
> [1]: https://lore.kernel.org/linux-riscv/20240319215915.832127-6-samuel.holland@xxxxxxxxxx/
>
>
> Samuel Holland (3):
>  riscv: Enable cbo.zero only when all harts support Zicboz
>  riscv: Add support for per-thread envcfg CSR values
>  riscv: Call riscv_user_isa_enable() only on the boot hart
>
> arch/riscv/include/asm/cpufeature.h |  2 +-
> arch/riscv/include/asm/processor.h  |  1 +
> arch/riscv/include/asm/switch_to.h  |  8 ++++++++
> arch/riscv/kernel/cpufeature.c      | 13 +++++++++----
> arch/riscv/kernel/smpboot.c         |  2 --
> arch/riscv/kernel/suspend.c         |  4 ++--
> 6 files changed, 21 insertions(+), 9 deletions(-)
>
> --
> 2.44.1