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3 Commits

Author SHA1 Message Date
Pierre Gondois bfb574db11 SecurityPkg/RngDxe: Correctly update mAvailableAlgoArrayCount 
mAvailableAlgoArrayCount holds the count of available RNG algorithms.
In a following patch, its value will be used to prevent the
EFI_RNG_PROTOCOL to be installed if no RNG algorithm is available.

Correctly set/reset the value for all implementations.

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
 2023-03-07 15:34:23 +00:00
Pierre Gondois 9eb5ccda50 SecurityPkg/RngDxe: Add Arm support of RngDxe 
Bugzilla: 3668 (https://bugzilla.tianocore.org/show_bug.cgi?id=3668)

Add RngDxe support for Arm. This implementation uses the ArmTrngLib
to support the RawAlgorithm and doens't support the RNDR instruction.

To re-use the RngGetRNG(), RngGetInfo() and FreeAvailableAlgorithms()
functions, create Arm/AArch64 files which implement the arch specific
function GetAvailableAlgorithms(). Indeed, FEAT_RNG instruction is not
supported on Arm.

Signed-off-by: Pierre Gondois <pierre.gondois@arm.com>
Acked-by: Jiewen Yao <jiewen.yao@intel.com>
 2022-11-06 16:32:28 +00:00
Pierre Gondois ff29cdb968 SecurityPkg/RngDxe: Rename AArch64/RngDxe.c 
To re-use the AArch64/RngDxe.c for an Arm implementation,
rename AArch64/RngDxe.c to ArmRngDxe.c.

Acked-by: Leif Lindholm <quic_llindhol@quicinc.com>
Signed-off-by: Pierre Gondois <Pierre.Gondois@arm.com>
Acked-by: Jiewen Yao <jiewen.yao@intel.com>
 2022-11-06 16:32:28 +00:00