From: Sinan Kaya <okaya@codeaurora.org>
To: Bjorn Helgaas <helgaas@kernel.org>
Cc: cov@codeaurora.org, Tomasz Nowicki <tn@semihalf.com>,
will.deacon@arm.com, catalin.marinas@arm.com, rafael@kernel.org,
Lorenzo.Pieralisi@arm.com, arnd@arndb.de, hanjun.guo@linaro.org,
jchandra@broadcom.com, dhdang@apm.com, ard.biesheuvel@linaro.org,
robert.richter@caviumnetworks.com, mw@semihalf.com,
Liviu.Dudau@arm.com, ddaney@caviumnetworks.com,
wangyijing@huawei.com, msalter@redhat.com,
linux-pci@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linaro-acpi@lists.linaro.org, jcm@redhat.com,
andrea.gallo@linaro.org, jeremy.linton@arm.com,
liudongdong3@huawei.com, gabriele.paoloni@huawei.com,
jhugo@codeaurora.org, linux-acpi@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCHv2] PCI: QDF2432 32 bit config space accessors
Date: Thu, 3 Nov 2016 13:06:28 -0400 [thread overview]
Message-ID: <fdabd92b-1e5f-e66a-a8ec-0f763b74de99@codeaurora.org> (raw)
In-Reply-To: <aa8bc916-9363-2de7-2997-4ce470562b2c@codeaurora.org>
On 11/3/2016 12:58 PM, Sinan Kaya wrote:
>> > This is the crucial point I have failed to communicate clearly: the
>> > PNP0C02 resource is *always* required, even if the MCFG is correct.
>> >
> Interesting...
>
> It looks like there is a lot of lessons learnt here from history.
>
> I think this requirement is only true if your system DDR space and PCIe
> space overlaps in the memory map. I understand that Intel systems allow
> sharing of these two memory ranges. An OS could potentially reclaim this
> address range.
>
> If there is no overlap and PCI is not enabled, there can't be any SW entity
> to reclaim this space.
>
> Did I miss something?
>
For protection, it makes sense to reserve this range. I'm trying to understand
who would claim this range.
--
Sinan Kaya
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.
WARNING: multiple messages have this Message-ID (diff)
From: okaya@codeaurora.org (Sinan Kaya)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCHv2] PCI: QDF2432 32 bit config space accessors
Date: Thu, 3 Nov 2016 13:06:28 -0400 [thread overview]
Message-ID: <fdabd92b-1e5f-e66a-a8ec-0f763b74de99@codeaurora.org> (raw)
In-Reply-To: <aa8bc916-9363-2de7-2997-4ce470562b2c@codeaurora.org>
On 11/3/2016 12:58 PM, Sinan Kaya wrote:
>> > This is the crucial point I have failed to communicate clearly: the
>> > PNP0C02 resource is *always* required, even if the MCFG is correct.
>> >
> Interesting...
>
> It looks like there is a lot of lessons learnt here from history.
>
> I think this requirement is only true if your system DDR space and PCIe
> space overlaps in the memory map. I understand that Intel systems allow
> sharing of these two memory ranges. An OS could potentially reclaim this
> address range.
>
> If there is no overlap and PCI is not enabled, there can't be any SW entity
> to reclaim this space.
>
> Did I miss something?
>
For protection, it makes sense to reserve this range. I'm trying to understand
who would claim this range.
--
Sinan Kaya
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.
next prev parent reply other threads:[~2016-11-03 17:06 UTC|newest]
Thread overview: 234+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-09 19:24 [PATCH V6 0/5] ECAM quirks handling for ARM64 platforms Tomasz Nowicki
2016-09-09 19:24 ` Tomasz Nowicki
2016-09-09 19:24 ` [PATCH V6 1/5] PCI/ACPI: Extend pci_mcfg_lookup() responsibilities Tomasz Nowicki
2016-09-09 19:24 ` Tomasz Nowicki
2016-09-09 19:24 ` [PATCH V6 2/5] PCI/ACPI: Check platform specific ECAM quirks Tomasz Nowicki
2016-09-09 19:24 ` Tomasz Nowicki
2016-09-12 22:24 ` Duc Dang
2016-09-12 22:24 ` Duc Dang
2016-09-12 22:24 ` Duc Dang
2016-09-12 22:47 ` Duc Dang
2016-09-12 22:47 ` Duc Dang
2016-09-12 22:47 ` Duc Dang
2016-09-13 5:58 ` Tomasz Nowicki
2016-09-13 5:58 ` Tomasz Nowicki
2016-09-13 5:58 ` Tomasz Nowicki
2016-09-13 6:37 ` Tomasz Nowicki
2016-09-13 6:37 ` Tomasz Nowicki
2016-09-13 6:37 ` Tomasz Nowicki
2016-09-13 2:36 ` Dongdong Liu
2016-09-13 2:36 ` Dongdong Liu
2016-09-13 2:36 ` Dongdong Liu
2016-09-13 6:32 ` Tomasz Nowicki
2016-09-13 6:32 ` Tomasz Nowicki
2016-09-13 11:38 ` Dongdong Liu
2016-09-13 11:38 ` Dongdong Liu
2016-09-13 11:38 ` Dongdong Liu
2016-09-14 12:40 ` Lorenzo Pieralisi
2016-09-14 12:40 ` Lorenzo Pieralisi
2016-09-15 10:58 ` Lorenzo Pieralisi
2016-09-15 10:58 ` Lorenzo Pieralisi
2016-09-16 9:02 ` Gabriele Paoloni
2016-09-16 9:02 ` Gabriele Paoloni
2016-09-16 9:02 ` Gabriele Paoloni
2016-09-16 9:02 ` Gabriele Paoloni
2016-09-16 12:27 ` Christopher Covington
2016-09-16 12:27 ` Christopher Covington
2016-09-16 12:27 ` Christopher Covington
2016-09-16 12:27 ` Christopher Covington
2016-09-16 13:42 ` Gabriele Paoloni
2016-09-16 13:42 ` Gabriele Paoloni
2016-09-16 13:42 ` Gabriele Paoloni
2016-09-16 13:42 ` Gabriele Paoloni
2016-09-09 19:24 ` [PATCH V6 3/5] PCI: thunder-pem: Allow to probe PEM-specific register range for ACPI case Tomasz Nowicki
2016-09-09 19:24 ` Tomasz Nowicki
2016-09-19 18:09 ` Bjorn Helgaas
2016-09-19 18:09 ` Bjorn Helgaas
2016-09-20 7:23 ` Tomasz Nowicki
2016-09-20 7:23 ` Tomasz Nowicki
2016-09-20 13:33 ` Bjorn Helgaas
2016-09-20 13:33 ` Bjorn Helgaas
2016-09-20 13:33 ` Bjorn Helgaas
2016-09-20 13:40 ` Ard Biesheuvel
2016-09-20 13:40 ` Ard Biesheuvel
2016-09-20 13:40 ` Ard Biesheuvel
2016-09-20 13:40 ` Ard Biesheuvel
2016-09-20 14:05 ` Bjorn Helgaas
2016-09-20 14:05 ` Bjorn Helgaas
2016-09-20 14:05 ` Bjorn Helgaas
2016-09-20 14:05 ` Bjorn Helgaas
2016-09-20 15:09 ` Ard Biesheuvel
2016-09-20 15:09 ` Ard Biesheuvel
2016-09-20 15:09 ` Ard Biesheuvel
2016-09-20 15:09 ` Ard Biesheuvel
2016-09-20 19:17 ` Bjorn Helgaas
2016-09-20 19:17 ` Bjorn Helgaas
2016-09-20 19:17 ` Bjorn Helgaas
2016-09-20 19:17 ` Bjorn Helgaas
2016-09-21 14:05 ` Lorenzo Pieralisi
2016-09-21 14:05 ` Lorenzo Pieralisi
2016-09-21 14:05 ` Lorenzo Pieralisi
2016-09-21 14:05 ` Lorenzo Pieralisi
2016-09-21 18:04 ` Bjorn Helgaas
2016-09-21 18:04 ` Bjorn Helgaas
2016-09-21 18:04 ` Bjorn Helgaas
2016-09-21 18:04 ` Bjorn Helgaas
2016-09-21 18:58 ` Duc Dang
2016-09-21 18:58 ` Duc Dang
2016-09-21 18:58 ` Duc Dang
2016-09-21 18:58 ` Duc Dang
2016-09-21 19:18 ` Bjorn Helgaas
2016-09-21 19:18 ` Bjorn Helgaas
2016-09-21 19:18 ` Bjorn Helgaas
2016-09-21 19:18 ` Bjorn Helgaas
2016-09-23 10:53 ` Tomasz Nowicki
2016-09-23 10:53 ` Tomasz Nowicki
2016-09-23 10:53 ` Tomasz Nowicki
2016-09-23 10:53 ` Tomasz Nowicki
2016-09-22 9:49 ` Lorenzo Pieralisi
2016-09-22 9:49 ` Lorenzo Pieralisi
2016-09-22 9:49 ` Lorenzo Pieralisi
2016-09-22 9:49 ` Lorenzo Pieralisi
2016-09-22 11:10 ` Gabriele Paoloni
2016-09-22 11:10 ` Gabriele Paoloni
2016-09-22 11:10 ` Gabriele Paoloni
2016-09-22 11:10 ` Gabriele Paoloni
2016-09-22 12:44 ` Lorenzo Pieralisi
2016-09-22 12:44 ` Lorenzo Pieralisi
2016-09-22 12:44 ` Lorenzo Pieralisi
2016-09-22 12:44 ` Lorenzo Pieralisi
2016-09-22 18:31 ` Bjorn Helgaas
2016-09-22 18:31 ` Bjorn Helgaas
2016-09-22 18:31 ` Bjorn Helgaas
2016-09-22 18:31 ` Bjorn Helgaas
2016-09-22 22:10 ` Bjorn Helgaas
2016-09-22 22:10 ` Bjorn Helgaas
2016-09-22 22:10 ` Bjorn Helgaas
2016-09-22 22:10 ` Bjorn Helgaas
2016-09-23 10:11 ` Lorenzo Pieralisi
2016-09-23 10:11 ` Lorenzo Pieralisi
2016-09-23 10:11 ` Lorenzo Pieralisi
2016-09-23 10:11 ` Lorenzo Pieralisi
2016-09-23 10:58 ` Gabriele Paoloni
2016-09-23 10:58 ` Gabriele Paoloni
2016-09-23 10:58 ` Gabriele Paoloni
2016-09-23 10:58 ` Gabriele Paoloni
2017-09-14 14:06 ` Ard Biesheuvel
2017-09-14 14:06 ` Ard Biesheuvel
2017-09-14 14:06 ` Ard Biesheuvel
2017-09-26 8:23 ` Gabriele Paoloni
2017-09-26 8:23 ` Gabriele Paoloni
2017-09-26 8:23 ` Gabriele Paoloni
2017-09-26 8:23 ` Gabriele Paoloni
2016-09-22 14:20 ` Christopher Covington
2016-09-22 14:20 ` Christopher Covington
2016-09-22 14:20 ` Christopher Covington
2016-09-22 14:20 ` Christopher Covington
2016-09-21 14:10 ` Gabriele Paoloni
2016-09-21 14:10 ` Gabriele Paoloni
2016-09-21 14:10 ` Gabriele Paoloni
2016-09-21 14:10 ` Gabriele Paoloni
2016-09-21 18:59 ` Bjorn Helgaas
2016-09-21 18:59 ` Bjorn Helgaas
2016-09-21 18:59 ` Bjorn Helgaas
2016-09-21 18:59 ` Bjorn Helgaas
2016-09-22 11:12 ` Gabriele Paoloni
2016-09-22 11:12 ` Gabriele Paoloni
2016-09-22 11:12 ` Gabriele Paoloni
2016-09-22 11:12 ` Gabriele Paoloni
2016-09-09 19:24 ` [PATCH V6 4/5] PCI: thunder: Enable ACPI PCI controller for ThunderX pass2.x silicon version Tomasz Nowicki
2016-09-09 19:24 ` Tomasz Nowicki
2016-09-19 15:45 ` Bjorn Helgaas
2016-09-19 15:45 ` Bjorn Helgaas
2016-09-20 7:06 ` Tomasz Nowicki
2016-09-20 7:06 ` Tomasz Nowicki
2016-09-20 13:08 ` Bjorn Helgaas
2016-09-20 13:08 ` Bjorn Helgaas
2016-09-20 13:08 ` Bjorn Helgaas
2016-09-21 8:05 ` Tomasz Nowicki
2016-09-21 8:05 ` Tomasz Nowicki
2016-09-09 19:24 ` [PATCH V6 5/5] PCI: thunder: Enable ACPI PCI controller for ThunderX pass1.x " Tomasz Nowicki
2016-09-09 19:24 ` Tomasz Nowicki
2016-09-09 19:30 ` [PATCH V6 0/5] ECAM quirks handling for ARM64 platforms Tomasz Nowicki
2016-09-09 19:30 ` Tomasz Nowicki
2016-09-20 19:26 ` Bjorn Helgaas
2016-09-20 19:26 ` Bjorn Helgaas
2016-09-21 1:15 ` cov
2016-09-21 1:15 ` cov at codeaurora.org
2016-09-21 13:11 ` Bjorn Helgaas
2016-09-21 13:11 ` Bjorn Helgaas
2016-09-21 14:07 ` Sinan Kaya
2016-09-21 14:07 ` Sinan Kaya
2016-09-21 17:31 ` Bjorn Helgaas
2016-09-21 17:31 ` Bjorn Helgaas
2016-09-21 17:31 ` Bjorn Helgaas
2016-09-21 17:34 ` Sinan Kaya
2016-09-21 17:34 ` Sinan Kaya
2016-09-21 22:38 ` [PATCHv2] PCI: QDF2432 32 bit config space accessors Christopher Covington
2016-09-21 22:38 ` Christopher Covington
2016-10-31 21:48 ` Bjorn Helgaas
2016-10-31 21:48 ` Bjorn Helgaas
2016-11-01 13:06 ` cov
2016-11-01 13:06 ` cov at codeaurora.org
2016-11-02 16:08 ` Bjorn Helgaas
2016-11-02 16:08 ` Bjorn Helgaas
2016-11-02 16:36 ` Sinan Kaya
2016-11-02 16:36 ` Sinan Kaya
2016-11-03 14:00 ` Bjorn Helgaas
2016-11-03 14:00 ` Bjorn Helgaas
2016-11-03 16:58 ` Sinan Kaya
2016-11-03 16:58 ` Sinan Kaya
2016-11-03 17:06 ` Sinan Kaya [this message]
2016-11-03 17:06 ` Sinan Kaya
2016-11-03 20:43 ` Bjorn Helgaas
2016-11-03 20:43 ` Bjorn Helgaas
2016-11-03 23:49 ` Sinan Kaya
2016-11-03 23:49 ` Sinan Kaya
2016-12-02 4:58 ` Jon Masters
2016-12-02 4:58 ` Jon Masters
2016-11-02 16:41 ` Bjorn Helgaas
2016-11-02 16:41 ` Bjorn Helgaas
2016-11-09 19:25 ` Christopher Covington
2016-11-09 19:25 ` Christopher Covington
2016-11-09 20:06 ` Bjorn Helgaas
2016-11-09 20:06 ` Bjorn Helgaas
2016-11-09 20:29 ` Ard Biesheuvel
2016-11-09 20:29 ` Ard Biesheuvel
2016-11-09 20:29 ` Ard Biesheuvel
2016-11-09 20:29 ` Ard Biesheuvel
2016-11-09 22:49 ` Bjorn Helgaas
2016-11-09 22:49 ` Bjorn Helgaas
2016-11-09 22:49 ` Bjorn Helgaas
2016-11-09 22:49 ` Bjorn Helgaas
2016-11-10 10:25 ` Ard Biesheuvel
2016-11-10 10:25 ` Ard Biesheuvel
2016-11-10 10:25 ` Ard Biesheuvel
2016-11-10 10:25 ` Ard Biesheuvel
2016-11-10 13:57 ` Lorenzo Pieralisi
2016-11-10 13:57 ` Lorenzo Pieralisi
2016-11-10 13:57 ` Lorenzo Pieralisi
2016-11-10 13:57 ` Lorenzo Pieralisi
2016-11-10 17:42 ` Bjorn Helgaas
2016-11-10 17:42 ` Bjorn Helgaas
2016-11-10 17:42 ` Bjorn Helgaas
2016-11-10 17:42 ` Bjorn Helgaas
2016-12-02 5:12 ` Jon Masters
2016-12-02 5:12 ` Jon Masters
2016-12-02 5:12 ` Jon Masters
2016-12-02 5:12 ` Jon Masters
2016-09-21 22:40 ` [PATCH V6 0/5] ECAM quirks handling for ARM64 platforms Christopher Covington
2016-09-21 22:40 ` Christopher Covington
2016-09-22 23:08 ` Bjorn Helgaas
2016-09-22 23:08 ` Bjorn Helgaas
2016-09-23 18:41 ` Christopher Covington
2016-09-23 18:41 ` Christopher Covington
2016-09-23 19:17 ` Bjorn Helgaas
2016-09-23 19:17 ` Bjorn Helgaas
2016-09-23 19:17 ` Bjorn Helgaas
2016-09-23 19:22 ` Christopher Covington
2016-09-23 19:22 ` Christopher Covington
2016-09-28 16:44 ` Christopher Covington
2016-11-24 11:05 ` [PATCH V6 1/1] ARM64/PCI: Manage controller-specific information on the host controller basis Tomasz Nowicki
2016-11-24 11:05 ` Tomasz Nowicki
2016-11-29 23:40 ` Bjorn Helgaas
2016-11-29 23:40 ` Bjorn Helgaas
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