On Wed, Sep 22, 2021 at 01:47:01PM +0100, Fuad Tabba wrote: > Protected VMs have more restricted features that need to be > trapped. Moreover, the host should not be trusted to set the > appropriate trapping registers and their values. > > Initialize the trapping registers, i.e., hcr_el2, mdcr_el2, and > cptr_el2 at EL2 for protected guests, based on the values of the > guest's feature id registers. > > No functional change intended as trap handlers introduced in the > previous patch are still not hooked in to the guest exit > handlers. > > Signed-off-by: Fuad Tabba <tabba@xxxxxxxxxx> > --- > arch/arm64/include/asm/kvm_asm.h | 1 + > arch/arm64/include/asm/kvm_host.h | 2 + > arch/arm64/kvm/arm.c | 8 ++ > arch/arm64/kvm/hyp/include/nvhe/pkvm.h | 14 ++ > arch/arm64/kvm/hyp/nvhe/Makefile | 2 +- > arch/arm64/kvm/hyp/nvhe/hyp-main.c | 10 ++ > arch/arm64/kvm/hyp/nvhe/pkvm.c | 186 +++++++++++++++++++++++++ > 7 files changed, 222 insertions(+), 1 deletion(-) > create mode 100644 arch/arm64/kvm/hyp/include/nvhe/pkvm.h > create mode 100644 arch/arm64/kvm/hyp/nvhe/pkvm.c Regarding the approach, LGTM Reviewed-by: Andrew Jones <drjones@xxxxxxxxxx> Thanks, drew
