Re: [Qemu-devel] BIOS regression since v2.3.0 (misaligned longword i/o to address 0xffff)

[Stefan Weil]

Am 27.07.2015 um 11:32 schrieb Stefan Weil:
> Am 27.07.2015 um 10:46 schrieb Paolo Bonzini:
>> On 27/07/2015 08:36, Stefan Weil wrote:
>>> commit 457ba42878bd9f704e5a6c1c7bc7fcced686fe4e
>>> Author: Paolo Bonzini <address@hidden>
>>> Date:   Thu May 15 13:22:28 2014 +0200
>>>
>>>     smm: complete SMM setup
>>>
>>>     SMI generation requires two bits to be set in PIIX4, one for APMC
>>>     interrupts specifically and a general one.
>>>
>>>     For Q35 it is the same, plus it is a good thing to lock SMIs after
>>>     enabling them.
>>>
>>>     Signed-off-by: Paolo Bonzini <address@hidden>
>>>
>>> :040000 040000 5bfd5601430bc5263ac0a6f8a15a131f3bc8678e
>>> 5e0901b1c5ae4c79ed4c34c8bd27e7daf9006086 M    src
>> Is this enough to fix it?
>>
>> --- a/src/fw/smm.c
>> +++ b/src/fw/smm.c
>> @@ -184,7 +184,7 @@ static void piix4_apmc_smm_setup(int isabdf, int 
>> i440_bdf)
>>  
>>      /* enable SMI generation */
>>      value = inl(acpi_pm_base + PIIX_PMIO_GLBCTL);
>> -    outl(acpi_pm_base + PIIX_PMIO_GLBCTL, value | PIIX_PMIO_GLBCTL_SMI_EN);
>> +    outl(value | PIIX_PMIO_GLBCTL_SMI_EN, acpi_pm_base + PIIX_PMIO_GLBCTL);
>>  
>>      smm_relocate_and_restore();
>>  
>>
>> Paolo
> 
> 
> Yes, and the new code also looks much better for an outl function call. :-)
> You may add
> 
> Reviewed-by: Stefan Weil <address@hidden>
> 
> Stefan


When I look at src/hw/megasas.c, I see three more outl function calls
with wrong argument order. CC'ing Hannes therefore.

Stefan