[PATCH v2 08/10] riscv: cpufeature: Introduce ISA bases bitmap and rva23u64 detection

[Andrew Jones]

On Mon, May 11, 2026 at 09:34:53PM -0400, Guodong Xu wrote:
...
> +	/* Zic64b and Supm with PMLEN=7 */
> +	if (riscv_cbom_block_size != 64 ||
> +	    riscv_cbop_block_size != 64 ||
> +	    riscv_cboz_block_size != 64 ||

The only mandated RVA23U64 extension we don't have ISA string support for
is Zic64b. I wonder if we shouldn't add that support too where it would
have a validate check like above.

Thanks,
drew