[PATCH V7 05/10] acpi: apei: handle SEA notification type for ARMv8

[tbaicar@codeaurora.org (Baicar, Tyler)]

On 1/24/2017 10:55 AM, James Morse wrote:
> Hi Tyler,
>
> On 20/01/17 20:58, Baicar, Tyler wrote:
>> On 1/19/2017 10:57 AM, James Morse wrote:
>>> On 18/01/17 23:51, Baicar, Tyler wrote:
>>>> On 1/18/2017 7:50 AM, James Morse wrote:
>>>>> On 12/01/17 18:15, Tyler Baicar wrote:
>>>>>> diff --git a/drivers/acpi/apei/ghes.c b/drivers/acpi/apei/ghes.c
>>> There are two other things that need changing to make the in_nmi() code path
>>> work on arm64.
>>> Always reserve the virtual-address-space forcing GHES_IOREMAP_PAGES to be 2
>>> regardless of CONFIG_HAVE_ACPI_APEI_NMI. This is almost revert of
>>> 594c7255dce7a13cac50cf2470cc56e2c3b0494e (but that did a few other things too).
>> Looks simple enough, should I force it to 2 in all cases, or add a check for
>> CONFIG_HAVE_ACPI_APEI_SEA
>> similar to the check for CONFIG_HAVE_ACPI_APEI_NMI?
> Its just address space not actual memory it is reserving right? I think just
> reserve two pages all the time to save eye-sore #ifdefs!
>
Okay, will do!
>>> We also need to fix ghes_ioremap_pfn_nmi() to use arch_apei_get_mem_attribute()
>>> and not assume PAGE_KERNEL.
>> So just change the call to ioremap_page_range to:
>>
>> ioremap_page_range(vaddr, vaddr + PAGE_SIZE, pfn << PAGE_SHIFT,
>> arch_apei_get_mem_attribute());
> (you need to give arch_apei_get_mem_attribute() the address...) copying whatever
> ghes_ioremap_pfn_irq() does a few lines down is probably best.
Sounds good, I'll make the changes in my next patchset.

Thanks,
Tyler

-- 
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project.