On Mon, Feb 24, 2025 at 10:20 PM Lorenzo Stoakes <lorenzo.stoakes@xxxxxxxxxx> wrote: > > On Mon, Feb 24, 2025 at 10:52:43PM +0000, jeffxu@xxxxxxxxxxxx wrote: > > From: Jeff Xu <jeffxu@xxxxxxxxxxxx> > > > > Provide support for CONFIG_MSEAL_SYSTEM_MAPPINGS on arm64, covering > > the vdso, vvar, and compat-mode vectors and sigpage mappings. > > > > Production release testing passes on Android and Chrome OS. > > This is pretty limited (yes yes I know android is massive etc. but we must > account for all the weird and wonderful arm64 devices out there in context of > upstream :) > > Have you looking through all arm64-code relating to vdso, vvar, compat-mode > vectors, sigpage mapping and ensured nothing kernel-side relies upon relocation? > Some arches actually seem to want to do this. Pretty sure PPC does... so a bit > nervous of that. > Can you please point out where PPC munmap/mremap the vdso ? Previously, when you mentioned that, I thought you meant user space in PPC, I didn't realize that you meant that kernel code in PPC. I tried, but didn't find anything, hence asking. Thanks. -Jeff
