Re: should ioapic_service really be modelling cpu writes?

["Alex Bennée" <alex.bennee@linaro.org>]

Paolo Bonzini <pbonzini@redhat.com> writes:

> On 11/11/22 13:26, Alex Bennée wrote:
>>       if (addr > 0xfff || !index) {
>>           switch (attrs.requester_type) {
>>           }
>>           MSIMessage msi = { .address = addr, .data = val };
>>           apic_send_msi(&msi);
>>           return MEMTX_OK;
>>       }
>
>
>> which at least gets things booting properly. Does this seem like a
>> better modelling of the APIC behaviour?
>
> Yes and you don't even need the "if", just do MTRT_CPU vs everything
> else.

Can the CPU trigger MSIs by writing to this area of memory? I went for
the explicit switch for clarity but are you saying:

        if (attrs.requester_type != MTRT_CPU) {
            MSIMessage msi = { .address = addr, .data = val };
            apic_send_msi(&msi);
            return MEMTX_OK;
        } else {
            return MEMTX_ACESSS_ERROR;
        }

for the MSI range?


>
> Paolo


-- 
Alex Bennée