Richard Henderson 1a50ec0b3b arm64: Implement archrandom.h for ARMv8.5-RNG ... Expose the ID_AA64ISAR0.RNDR field to userspace, as the RNG system registers are always available at EL0. Implement arch_get_random_seed_long using RNDR. Given that the TRNG is likely to be a shared resource between cores, and VMs, do not explicitly force re-seeding with RNDRRS. In order to avoid code complexity and potential issues with hetrogenous systems only provide values after cpufeature has finalized the system capabilities. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> [Modified to only function after cpufeature has finalized the system capabilities and move all the code into the header -- broonie] Signed-off-by: Mark Brown <broonie@kernel.org> Reviewed-by: Mark Rutland <mark.rutland@arm.com> Reviewed-by: Ard Biesheuvel <ardb@kernel.org> [will: Advertise HWCAP via /proc/cpuinfo] Signed-off-by: Will Deacon <will@kernel.org>		2020-01-22 09:54:18 +00:00
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asm	arm64: Implement archrandom.h for ARMv8.5-RNG	2020-01-22 09:54:18 +00:00
uapi/asm	arm64: Implement archrandom.h for ARMv8.5-RNG	2020-01-22 09:54:18 +00:00