On Tue, 08 Jan 2019 14:07:19 +0000, Julien Thierry <julien.thierry@xxxxxxx> wrote: > > When using VHE, the host needs to clear HCR_EL2.TGE bit in order > to interract with guest TLBs, switching from EL2&0 translation regime > to EL1&0. > > However, some non-maskable asynchronous event could happen while TGE is > cleared like SDEI. Because of this address translation operations > relying on EL2&0 translation regime could fail (tlb invalidation, > userspace access, ...). > > Fix this by properly setting HCR_EL2.TGE when entering NMI context and > clear it if necessary when returning to the interrupted context. > > Signed-off-by: Julien Thierry <julien.thierry@xxxxxxx> > Suggested-by: Marc Zyngier <marc.zyngier@xxxxxxx> > Cc: Arnd Bergmann <arnd@xxxxxxxx> > Cc: Catalin Marinas <catalin.marinas@xxxxxxx> > Cc: Will Deacon <will.deacon@xxxxxxx> > Cc: Marc Zyngier <marc.zyngier@xxxxxxx> > Cc: James Morse <james.morse@xxxxxxx> > Cc: linux-arch@xxxxxxxxxxxxxxx > Cc: stable@xxxxxxxxxxxxxxx Reviewed-by: Marc Zyngier <marc.zyngier@xxxxxxx> Thanks, M. -- Jazz is not dead, it just smell funny.
