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

[Stefan Weil <sw@weilnetz.de>]

Am 27.07.2015 um 10:46 schrieb Paolo Bonzini:
> On 27/07/2015 08:36, Stefan Weil wrote:
>> commit 457ba42878bd9f704e5a6c1c7bc7fcced686fe4e
>> Author: Paolo Bonzini <pbonzini@redhat.com>
>> 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 <pbonzini@redhat.com>
>>
>> :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 <sw@weilnetz.de>

Stefan