On Wed, Sep 13, 2023 at 12:32:54PM +0530, Mukesh Ojha wrote: > Thanks for the response. > > On 9/12/2023 3:48 PM, Will Deacon wrote: > > On Mon, Sep 11, 2023 at 04:23:50PM +0530, Mukesh Ojha wrote: > > > The reserved memory region for ramoops is assumed to be at a fixed > > > and known location when read from the devicetree. This may not be > > > required for something like Qualcomm's minidump which is interested > > > in knowing addresses of ramoops region but it does not put hard > > > requirement of address being fixed as most of it's SoC does not > > > support warm reset and does not use pstorefs at all instead it has > > > firmware way of collecting ramoops region if it gets to know the > > > address and register it with apss minidump table which is sitting > > > in shared memory region in DDR and firmware will have access to > > > these table during reset and collects it on crash of SoC. > > > > > > So, add the support of reserving ramoops region to be dynamically > > > allocated early during boot if it is request through command line > > > via 'dyn_ramoops_size=' and fill up reserved resource structure and > > > export the structure, so that it can be read by ramoops driver. > > > > > > Signed-off-by: Mukesh Ojha <quic_mojha@xxxxxxxxxxx> > > > --- > > > arch/arm64/mm/init.c | 94 ++++++++++++++++++++++++++++++++++++++++++++++ > > > > Why does this need to be in the arch code? There's absolutely nothing > > arm64-specific here. > > Current clients of this cmdline would be only arm64, and that is the > reason of putting this here. I don't think that's a strong enough justification, tbh. We should at least be able to compile this for other architectures using TEST_COMPILE and so somewhere under drivers/ makes more sense to me. Will
