Hi all, This is v8 of the nVHE hypervisor stack enhancements. This version is based on 5.18-rc3. Previous versions can be found at: v7: https://lore.kernel.org/r/20220408200349.1529080-1-kaleshsingh@xxxxxxxxxx/ v6: https://lore.kernel.org/r/20220314200148.2695206-1-kaleshsingh@xxxxxxxxxx/ v5: https://lore.kernel.org/r/20220307184935.1704614-1-kaleshsingh@xxxxxxxxxx/ v4: https://lore.kernel.org/r/20220225033548.1912117-1-kaleshsingh@xxxxxxxxxx/ v3: https://lore.kernel.org/r/20220224051439.640768-1-kaleshsingh@xxxxxxxxxx/ v2: https://lore.kernel.org/r/20220222165212.2005066-1-kaleshsingh@xxxxxxxxxx/ v1: https://lore.kernel.org/r/20220210224220.4076151-1-kaleshsingh@xxxxxxxxxx/ Thanks, Kalesh ----- This series is based on 5.18-rc3 and adds stack guard pages to nVHE and pKVM hypervisor; and symbolization of hypervisor addresses. The guard page stack overflow detection is based on the technique used by arm64 VMAP_STACK. i.e. the stack is aligned such that the 'stack shift' bit of any valid SP is 1. The 'stack shift' bit can be tested in the exception entry to detect overflow without corrupting GPRs. Kalesh Singh (6): KVM: arm64: Introduce hyp_alloc_private_va_range() KVM: arm64: Introduce pkvm_alloc_private_va_range() KVM: arm64: Add guard pages for KVM nVHE hypervisor stack KVM: arm64: Add guard pages for pKVM (protected nVHE) hypervisor stack KVM: arm64: Detect and handle hypervisor stack overflows KVM: arm64: Symbolize the nVHE HYP addresses arch/arm64/include/asm/kvm_asm.h | 1 + arch/arm64/include/asm/kvm_mmu.h | 3 ++ arch/arm64/kvm/arm.c | 37 +++++++++++-- arch/arm64/kvm/handle_exit.c | 13 ++--- arch/arm64/kvm/hyp/include/nvhe/mm.h | 6 ++- arch/arm64/kvm/hyp/nvhe/host.S | 24 +++++++++ arch/arm64/kvm/hyp/nvhe/hyp-main.c | 18 ++++++- arch/arm64/kvm/hyp/nvhe/mm.c | 78 ++++++++++++++++++---------- arch/arm64/kvm/hyp/nvhe/setup.c | 31 +++++++++-- arch/arm64/kvm/hyp/nvhe/switch.c | 7 ++- arch/arm64/kvm/mmu.c | 68 ++++++++++++++++-------- scripts/kallsyms.c | 3 +- 12 files changed, 220 insertions(+), 69 deletions(-) base-commit: b2d229d4ddb17db541098b83524d901257e93845 -- 2.36.0.rc0.470.gd361397f0d-goog _______________________________________________ kvmarm mailing list kvmarm@xxxxxxxxxxxxxxxxxxxxx https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
