Hi all, In the context of the currently ongoing work to remove the host kernel from the TCB under KVM/arm64, I have been trying to wrap the host kernel with a stage 2 page-table -- see [1]. Using this infrastructure, I attempted to unmap the .hyp. sections from the host stage 2 as it really shouldn't need to access them. But by doing so, I realized quickly the module loader was getting very confused by the usage of EXPORT_SYMBOL() macros in library functions that have been pulled into the EL2 object, and that we end up linking modules against the EL2 copy of e.g. memset. And so, this series essentially tries to fix this. - Patch 01 changes asm-generic/export.h to ensure we respect __DISABLE_EXPORTS even for asm exports; - and patch 02 makes use of it for all of the nVHE EL2 code. This was tested on aml-s905x-cc, which now successfully loads kernel modules with .hyp.text unmapped from the host. Thanks, Quentin [1] https://lore.kernel.org/kvmarm/20210108121524.656872-1-qperret@xxxxxxxxxx/ Quentin Perret (2): asm-generic: export: Stub EXPORT_SYMBOL with __DISABLE_EXPORTS KVM: arm64: Stub EXPORT_SYMBOL for nVHE EL2 code arch/arm64/kvm/hyp/nvhe/Makefile | 4 ++-- include/asm-generic/export.h | 2 +- 2 files changed, 3 insertions(+), 3 deletions(-) -- 2.30.0.365.g02bc693789-goog _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
