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2021 13:40:04 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0 MIME-Version: 1.0 In-Reply-To: <20210805211200.491275-1-jeremy.linton@arm.com> Content-Language: en-US X-Provags-ID: V03:K1:C891bMNflNEnNuQu9soF0cwJ7szSNK4HXZT1A7bb0mBlJlwpOpD rGEgRGHCCO7/niwOvc8nr263HBmukhHjuljZYnc39zgqGShEYIg/wvIB3OHU+7pS1C5AkrJ rpTI8RCYwNQS8Ib46Abf6Ggng40rvSKvYngneLZA7WyCbUC2uULD3M06dYefdJJg4HY2od5 ZY7S27Pqb7kWKtom62vHg== X-UI-Out-Filterresults: notjunk:1;V03:K0:71pa6kn6WSY=:gMEuooBEj321EK/56BL34W 5hQn9ztoZZY4WZDhM3xCSaRV5QK1tX8+wcNTqzdaFClEGP+GKB6NsAv5lWzJhvSKumflA5OsI qeXodAQsmFkESgoHrAQjcLilYuT/Td9lu7ggKWe6ZSOdx0rhuC1wEbjqdR0v7ugdfEw2juFcj S+Y8Hqta/ZcUA2r3PAr/CXCWmoqCjkZ/9jwxfVC0P5nbTKspgLGaDnuxt/Apj63Yjl64EnjUn tDqzMJFATw2qUX2WgOLYMyvg90L1+7p1oTGaYsQ56npKCw+HpJgeAIZ31Xt4gLQkn4ecG6zTA /ryyTt47fGXArgne9KaEBO+YvW68X0vjr0FRwiACwnFZZZJBs1LnFksGAXrr98AJl6yQu4WKB oDAoDowhHI/I4dpjhw/1/JzklP6R9zpZ1esuOj3aKVVVzBrtBeyQhE444lXybUI6Ytx5JoRfh 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Hi Jeremy, Am 05.08.21 um 23:11 schrieb Jeremy Linton: > The PFTF CM4 is an ACPI platform that is following the PCIe SMCCC > standard because its PCIe config space isn't ECAM compliant and is > split into two parts. One part for the root port registers and a > moveable window which points at a given device's 4K config space. > Thus it doesn't have a MCFG (and really any MCFG provided would be > nonsense anyway). As linux doesn't support the PCIe SMCCC standard > we key off a linux specific host bridge _DSD to add custom ECAM > ops and cfgres. The cfg op selects between those two regions, as > well as disallowing problematic accesses, particularly if the link > is down because there isn't an attached device. i just want to inform you, that i recently submitted the inital patch series for DT support regarding CM4 [1]. I left out anything related to PCIe (including downstream changes to pcie-brcmstb). Best regards Stefan [1] - https://marc.info/?l=linux-arm-kernel&m=162782110325813&w=2 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel