Re: [PATCH v5 08/13] coresight: Interpret perf config with ATTR_CFG_GET_FLD()

[Leo Yan <leo.yan@arm.com>]

On Wed, Nov 19, 2025 at 12:00:30PM +0000, James Clark wrote:

[...]

> ...  But then to make
> the code match the warning it might also make sense to change CONFIG_ARM64
> back to CONFIG_CORESIGHT_SOURCE_ETM4X, which Leo suggested to change. Maybe
> I can just delete the warning text, practically this warning can never be
> hit.

Armv8 CPUs can runs in aarch32 mode, strictly speaking, we should also
can run ETMv4 driver in aarch32 mode as well.  Then CONFIG_ARM64 is the
right choice, this can remind us that `is_kernel_in_hyp_mode()` is
always stick to aarch64 mode.

  static ssize_t format_attr_contextid_show(struct device *dev,
                                            struct device_attribute *attr,
                                            char *page)
  {
  #if IS_ENABLED(CONFIG_ARM64)
       if (is_kernel_in_hyp_mode())
               return contextid2_show(dev, attr, page);
  #endif

       return contextid1_show(dev, attr, page);
  }

Thanks,
Leo