On 26/05/2021 22:48, Catalin Marinas wrote: > On Wed, May 26, 2021 at 08:47:16PM +0100, Jon Hunter wrote: >> On 11/05/2021 19:23, Catalin Marinas wrote: >>> The GMID_EL1.BS field determines the number of tags accessed by the >>> LDGM/STGM instructions (EL1 and up), used by the kernel for copying or >>> zeroing page tags. >>> >>> Taint the kernel if GMID_EL1.BS differs between CPUs. >>> >>> Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx> >>> Cc: Will Deacon <will@xxxxxxxxxx> >>> Cc: Mark Rutland <mark.rutland@xxxxxxx> >>> Cc: Suzuki K Poulose <Suzuki.Poulose@xxxxxxx> > [...] >> I am seeing the following undefined instruction crash on all our >> ARM64 Tegra devices on today's -next and bisect is pointing to >> this patch. Reverting this patch on top of -next does fix the >> problem. Let me know if you have any thoughts. > > Yeah, sorry about that. Posted a new version here, better tested: > > https://lore.kernel.org/r/20210526193621.21559-1-catalin.marinas@xxxxxxx > > Will should have dropped the old one from linux-next but it takes a few > hours before Stephen re-creates the tree. No problem. Thanks for the quick fix! Jon -- nvpublic
