Andre Przywara 38db987316 arm64: Add support for SMCCC TRNG entropy source ... The ARM architected TRNG firmware interface, described in ARM spec DEN0098, defines an ARM SMCCC based interface to a true random number generator, provided by firmware. This can be discovered via the SMCCC >=v1.1 interface, and provides up to 192 bits of entropy per call. Hook this SMC call into arm64's arch_get_random_*() implementation, coming to the rescue when the CPU does not implement the ARM v8.5 RNG system registers. For the detection, we piggy back on the PSCI/SMCCC discovery (which gives us the conduit to use (hvc/smc)), then try to call the ARM_SMCCC_TRNG_VERSION function, which returns -1 if this interface is not implemented. Reviewed-by: Mark Brown <broonie@kernel.org> Signed-off-by: Andre Przywara <andre.przywara@arm.com> Signed-off-by: Will Deacon <will@kernel.org>		2021-01-21 17:42:46 +00:00
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asm	arm64: Add support for SMCCC TRNG entropy source	2021-01-21 17:42:46 +00:00
uapi/asm	KVM: arm64: Move 'struct kvm_arch_memory_slot' out of uapi/	2020-11-27 18:59:05 +00:00