Re: [PATCH v4 6/7] arm64: mm: Set ZONE_DMA size based on early IORT scan

2020-10-28 Thread Hanjun Guo
On 2020/10/21 20:34, Nicolas Saenz Julienne wrote: From: Ard Biesheuvel We recently introduced a 1 GB sized ZONE_DMA to cater for platforms incorporating masters that can address less than 32 bits of DMA, in particular the Raspberry Pi 4, which has 4 or 8 GB of DRAM, but has peripherals that

Re: [PATCH v4 6/7] arm64: mm: Set ZONE_DMA size based on early IORT scan

2020-10-27 Thread Lorenzo Pieralisi
On Wed, Oct 21, 2020 at 02:34:36PM +0200, Nicolas Saenz Julienne wrote: > From: Ard Biesheuvel > > We recently introduced a 1 GB sized ZONE_DMA to cater for platforms > incorporating masters that can address less than 32 bits of DMA, in > particular the Raspberry Pi 4, which has 4 or 8 GB of

[PATCH v4 6/7] arm64: mm: Set ZONE_DMA size based on early IORT scan

2020-10-21 Thread Nicolas Saenz Julienne
From: Ard Biesheuvel We recently introduced a 1 GB sized ZONE_DMA to cater for platforms incorporating masters that can address less than 32 bits of DMA, in particular the Raspberry Pi 4, which has 4 or 8 GB of DRAM, but has peripherals that can only address up to 1 GB (and its PCIe host bridge