On Wed, Mar 10, 2021 at 05:57:34PM +0000, Quentin Perret wrote: > Previous commits have introduced infrastructure to enable the EL2 code > to manage its own stage 1 mappings. However, this was preliminary work, > and none of it is currently in use. > > Put all of this together by elevating the mapping creation at EL2 when > memory protection is enabled. In this case, the host kernel running > at EL1 still creates _temporary_ EL2 mappings, only used while > initializing the hypervisor, but frees them right after. > > As such, all calls to create_hyp_mappings() after kvm init has finished > turn into hypercalls, as the host now has no 'legal' way to modify the > hypevisor page tables directly. > > Signed-off-by: Quentin Perret <qperret@xxxxxxxxxx> > --- > arch/arm64/include/asm/kvm_mmu.h | 2 +- > arch/arm64/kvm/arm.c | 87 +++++++++++++++++++++++++++++--- > arch/arm64/kvm/mmu.c | 43 ++++++++++++++-- > 3 files changed, 120 insertions(+), 12 deletions(-) Acked-by: Will Deacon <will@xxxxxxxxxx> Will _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
