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Provide a hypervisor implementation of the ARM architected TRNG firmware
interface described in ARM spec DEN0098. All function IDs are implemented,
including both 32-bit and 64-bit versions of the TRNG_RND service, which
is the centerpiece of the API.
The API is backed by the kernel's entropy pool only, to avoid guests
draining more precious direct entropy sources.
Signed-off-by: Ard Biesheuvel <[email protected]>
[Andre: minor fixes, drop arch_get_random() usage]
Signed-off-by: Andre Przywara <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
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