Re: [PATCH v5 5/5] x86/CPU/AMD: Print the reason for the last reset

[Mario Limonciello <superm1@kernel.org>]

On 4/30/2025 2:25 PM, Borislav Petkov wrote:
> On Wed, Apr 30, 2025 at 02:17:43PM -0500, Mario Limonciello wrote:
>> Well with that approach once you got a known bit set you broke the loop and
>> would print a message for that known bit.  But if you have two bits set you
>> either need another loop or you only get one message print.
> 
> So I gather you want to print for *each* set bit?
> 
> If so:
> 
> 	for (i = 0; i <= ARRAY_SIZE(s5_reset_reason_txt); i++) {
> 		if (!(value & BIT(i)))
> 			continue;
> 
> 		if (s5_reset_reason_txt[i])
> 			pr_info(...);
> 	}
> 
> Still a lot easier instead of calling some function and dealing with from
> which bit to start etc etc.
> 
> 

This would work, but would still need to track if "no" known bits were 
set to emit an "unknown" message.

So the loops end up being for() and check a bit or while (true) and 
find_next_bit() and otherwise identical.

At that point does it really buy much more than the while (true) 
approach and find_next_bit()?