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9cd2a7f118
Uprobes need more advanced read, push, and pop userspace GCS functionality. Implement those features using the existing gcsstr() and copy_from_user(). Its important to note that GCS pages can be read by normal instructions, but the hardware validates that pages used by GCS specific operations, have a GCS privilege set. We aren't validating this in load_user_gcs because it requires stabilizing the VMA over the read which may fault. Signed-off-by: Jeremy Linton <jeremy.linton@arm.com> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Reviewed-by: Mark Brown <broonie@kernel.org> [will: Add '__force' to gcspr cast in pop_user_gcs()] Signed-off-by: Will Deacon <will@kernel.org>
196 lines
4.1 KiB
196 lines
4.1 KiB