CHERI: preserve VMA reservation data for purecap userspace#25
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heshamelmatary wants to merge 1 commit into
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CHERI: preserve VMA reservation data for purecap userspace#25heshamelmatary wants to merge 1 commit into
heshamelmatary wants to merge 1 commit into
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Reservation metadata is currently copied only when CONFIG_CHERI_KERNEL is enabled (ie only purecap RVY at the moment). However, purecap userspace with hybrid Morello kernel also relies on VMA reservation data being preserved across VMA duplication and initialisation paths. Use CONFIG_CHERI_PURECAP_UABI instead so reservation data is retained for purecap user VMAs with a hybrid Morello kernel as well. Signed-off-by: Hesham Almatary <hesham.almatary@cl.cam.ac.uk>
kevin-brodsky-arm
approved these changes
May 29, 2026
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Reservation metadata is currently copied only when CONFIG_CHERI_KERNEL is enabled (ie only purecap RVY at the moment). However, purecap userspace with hybrid Morello kernel also relies on VMA reservation data being preserved across VMA duplication and initialisation paths. Use CONFIG_CHERI_PURECAP_UABI instead so reservation data is retained for purecap user VMAs with a hybrid Morello kernel as well.