Re: [PATCH v4 1/3] time: add "NOW() good" indicator

On 30-Jun-26 16:06, Jan Beulich wrote:
> printk_start_of_line() checks for a value of 0 right now. In order to be
> able to have NOW() return at least monotonically increasing values, that
> needs replacing by an explicit indicator.
> 
> Signed-off-by: Jan Beulich <[email protected]>
Reviewed-by: Michal Orzel <[email protected]>

> ---
> Arm and RISC-V may want to consider whether their initial get_cycles()
> can't be moved yet earlier, such that the indicator also can be set
> yet earlier.
On Arm, get_cycles() just reads a system register and it could be moved earlier.
That said, is there any rule as to what should actually be considered a start of
time (i.e. the boot_count value)? At the moment, this denotes the moment where
the time driver is set up in preinit_xen_time() after validating the frequency.

~Michal