[RFC PATCH v2 32/45] arm64: nmi: Manage masking for superpriority interrupts

[Vladimir Murzin]

On 7/28/26 13:14, Jinjie Ruan wrote:
>> @@ -194,10 +218,21 @@ void __arm64_update_exc_hwstate(arm64_exc_hwstate_t hwstate, bool force)
>>  		write_sysreg_s(hwstate.pmr, SYS_ICC_PMR_EL1);
>>  	}
>>  
>> +	/*
>> +	 * Try to order ALLINT writes to be consistent with the DAIF state :
>> +	 * we don't want to take an NMI with DAIF masked or when it should
>> +	 * be masked but isn't yet.
>> +	 */
>> +	if (system_uses_nmi() && hwstate.allint && force)
> 
> hwstate.allint & ALLINT_ALLINT
> 

Fair enough.

>> +		_allint_set();
>> +
>>  	barrier();
>>  	write_sysreg(hwstate.daif, daif);
>>  	barrier();
>>  
>> +	if (system_uses_nmi() && !hwstate.allint && force)
> !(hwstate.allint & ALLINT_ALLINT）
> 

Fair enough.

I'll fix both of them in the next version.

Thanks
Vladimir

>> +		_allint_clear();
>> +
>>  	if (system_uses_irq_prio_masking() &&
>>  	    hwstate.pmr == GIC_PRIO_IRQON &&
>>  	    force) {