From: arnd@arndb.de (Arnd Bergmann)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH V1 11/11] arm64, pci, acpi: Support for ACPI based PCI hostbridge init
Date: Tue, 03 Nov 2015 16:59:28 +0100 [thread overview]
Message-ID: <5802577.H74A3Lg5B3@wuerfel> (raw)
In-Reply-To: <5638CE5D.4030703@codeaurora.org>
On Tuesday 03 November 2015 10:10:21 Sinan Kaya wrote:
>
> I don't see anywhere in the SBSA spec addendum that the PCI
> configuration space section that unaligned accesses *MUST* be supported.
>
> If this is required, please have this info added to the spec. I can work
> with the designers for the next chip.
>
> Unaligned access on the current hardware returns incomplete values or
> can cause bus faults. The behavior is undefined.
Unaligned accesses are not allowed, but any PCI compliant device must
support aligned 1, 2 or 4 byte accesses on its configuration space,
though the byte-enable mechanism. In an ECAM host bridge, those are
mapped to load/store accesses from the CPU with the respective width
and natural alignment.
Arnd
next prev parent reply other threads:[~2015-11-03 15:59 UTC|newest]
Thread overview: 59+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-27 16:38 [PATCH V1 00/11] MMCONFIG refactoring and ARM64 PCI hostbridge init based on ACPI Tomasz Nowicki
2015-10-27 16:38 ` [PATCH V1 01/11] x86, pci: Reorder logic of pci_mmconfig_insert() function Tomasz Nowicki
2015-10-27 16:38 ` [PATCH V1 02/11] x86, pci, acpi: Move arch-agnostic MMCONFIG (aka ECAM) and ACPI code out of arch/x86/ directory Tomasz Nowicki
2015-10-27 16:38 ` [PATCH V1 03/11] pci, acpi, mcfg: Provide generic implementation of MCFG code initialization Tomasz Nowicki
2015-10-27 16:38 ` [PATCH V1 04/11] x86, pci: mmconfig_{32, 64}.c code refactoring - remove code duplication Tomasz Nowicki
2015-10-27 16:38 ` [PATCH V1 05/11] x86, pci, ecam: mmconfig_64.c becomes default implementation for ECAM driver Tomasz Nowicki
2015-10-27 16:38 ` [PATCH V1 06/11] pci, acpi, mcfg: Provide default RAW ACPI PCI config space accessors Tomasz Nowicki
2015-10-27 16:38 ` [PATCH V1 07/11] XEN / PCI: Remove the dependence on arch x86 when PCI_MMCONFIG=y Tomasz Nowicki
2015-10-27 16:47 ` [Linaro-acpi] " Tomasz Nowicki
2015-10-27 17:25 ` Boris Ostrovsky
2015-10-28 10:49 ` Stefano Stabellini
2015-10-28 10:56 ` Tomasz Nowicki
2015-10-28 13:45 ` Hanjun Guo
2015-10-28 14:07 ` Boris Ostrovsky
2015-10-27 16:38 ` [PATCH V1 08/11] pci, acpi, ecam: Add flag to indicate whether ECAM region was hot added or not Tomasz Nowicki
2015-10-27 16:38 ` [PATCH V1 09/11] x86, pci: Use previously added ECAM hot_added flag to remove ECAM regions Tomasz Nowicki
2015-10-27 16:38 ` [PATCH V1 10/11] pci, acpi: Provide generic way to assign bus domain number Tomasz Nowicki
2015-10-28 11:38 ` Liviu.Dudau at arm.com
2015-10-28 12:47 ` [Linaro-acpi] " Tomasz Nowicki
2015-11-03 16:10 ` Lorenzo Pieralisi
2015-11-04 10:04 ` [Linaro-acpi] " Tomasz Nowicki
2015-10-27 16:38 ` [PATCH V1 11/11] arm64, pci, acpi: Support for ACPI based PCI hostbridge init Tomasz Nowicki
2015-10-28 11:49 ` Liviu.Dudau at arm.com
2015-10-28 13:42 ` Tomasz Nowicki
2015-10-28 13:51 ` Liviu.Dudau at arm.com
2015-11-03 14:32 ` Lorenzo Pieralisi
2015-11-03 16:28 ` Liviu.Dudau at arm.com
2015-10-28 18:46 ` Sinan Kaya
2015-10-28 20:36 ` Sinan Kaya
2015-10-29 11:38 ` Tomasz Nowicki
2015-10-29 15:01 ` Sinan Kaya
2015-10-29 15:53 ` Tomasz Nowicki
2015-10-29 16:20 ` Sinan Kaya
2015-10-29 14:57 ` Sinan Kaya
2015-10-29 16:27 ` Tomasz Nowicki
2015-11-03 14:15 ` Lorenzo Pieralisi
2015-11-03 14:39 ` Tomasz Nowicki
2015-11-03 15:10 ` Sinan Kaya
2015-11-03 15:59 ` Arnd Bergmann [this message]
2015-11-03 16:33 ` Sinan Kaya
2015-11-03 16:55 ` Arnd Bergmann
2015-11-03 17:43 ` Sinan Kaya
2015-11-05 14:48 ` [Linaro-acpi] " Sinan Kaya
2015-11-03 15:19 ` Hanjun Guo
2015-11-03 17:39 ` David Daney
2015-11-03 18:00 ` Gabriele Paoloni
2015-11-03 16:55 ` Lorenzo Pieralisi
2015-11-04 9:59 ` Tomasz Nowicki
2015-11-04 10:11 ` Tomasz Nowicki
2015-10-30 4:07 ` [PATCH V1 00/11] MMCONFIG refactoring and ARM64 PCI hostbridge init based on ACPI Jon Masters
2015-10-30 4:50 ` Hanjun Guo
2015-10-30 8:26 ` Tomasz Nowicki
2015-10-30 16:38 ` Suravee Suthikulpanit
2015-12-07 20:31 ` Bjorn Helgaas
2015-12-09 10:01 ` Jayachandran C.
2015-12-09 15:55 ` Lorenzo Pieralisi
2015-12-16 12:51 ` Jayachandran C.
2015-12-16 14:05 ` Lorenzo Pieralisi
2015-12-08 17:43 ` Jeremy Linton
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