From: Alexandru Gagniuc > Sent: 15 November 2018 23:16 ... > I've asked around a few people at Dell and they unanimously agree that > _OSC is the correct way to determine ownership of AER. This is all very well, but we have systems (they might be Dell ones) where failure of a PCIe link (even when all the drivers are removed) causes an NMI - and crashes the kernel. There are other systems which have AER registers available for some of the PCIe devices, but the BIOS ignores them and _OSC doesn't let the kernel take control. In this case the AER registers can contain useful information after a read returns ~0u. It would be useful to be able to get this information without having to grovel through all the PCIe config space. David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
