From: Gavin Shan <gwshan@linux.vnet.ibm.com>
To: Michael Ellerman <mpe@ellerman.id.au>
Cc: Gavin Shan <gwshan@linux.vnet.ibm.com>, linuxppc-dev@ozlabs.org
Subject: Re: powerpc/powernv: Exclude MSI region in extended bridge window
Date: Tue, 21 Jun 2016 16:04:16 +1000 [thread overview]
Message-ID: <20160621060416.GA30118@gwshan> (raw)
In-Reply-To: <3rYZXm3HTnz9sxS@ozlabs.org>
On Tue, Jun 21, 2016 at 02:30:48PM +1000, Michael Ellerman wrote:
>On Tue, 2016-21-06 at 02:41:05 UTC, Gavin Shan wrote:
>> The windows of root port and bridge behind that are extended to
>> the PHB's windows to accomodate the PCI hotplug happening in
>> future. The PHB's 64KB 32-bits MSI region is included in bridge's
>> M32 windows (in hardware) though it's excluded in the corresponding
>> resource, as the bridge's M32 windows have 1MB as their minimal
>> alignment. We observed EEH error during system boot when the MSI
>> region is included in bridge's M32 window.
>>
>> This excludes top 1MB (including 64KB 32-bits MSI region) region
>> from bridge's M32 windows when extending them.
>
>AFAICS you added that code in "powerpc/powernv: Extend PCI bridge resources", so
>I'll squash it into that. That way there is no window of breakage.
>
Yeah, I guess it's the best way to go. Thanks a lot, Michael.
Thanks,
Gavin
prev parent reply other threads:[~2016-06-21 6:04 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-21 2:41 [PATCH] powerpc/powernv: Exclude MSI region in extended bridge window Gavin Shan
2016-06-21 2:43 ` Gavin Shan
2016-06-21 4:30 ` Michael Ellerman
2016-06-21 6:04 ` Gavin Shan [this message]
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