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| author | Dhaval <dhaval@rivosinc.com> | 2024-06-20 17:42:41 +0530 |
|---|---|---|
| committer | mergify[bot] <37929162+mergify[bot]@users.noreply.github.com> | 2024-07-15 04:05:56 +0000 |
| commit | b54bc983c6102a59c9e0472dd0406ac9ccbaa0bf (patch) | |
| tree | a309d66b733e85f0da70e0872f6be20dc75b47e0 /MdePkg/MdePkg.dec | |
| parent | d4dbe5e101dcb86974f8dce3505b38343b83b432 (diff) | |
| download | edk2-b54bc983c6102a59c9e0472dd0406ac9ccbaa0bf.zip edk2-b54bc983c6102a59c9e0472dd0406ac9ccbaa0bf.tar.gz edk2-b54bc983c6102a59c9e0472dd0406ac9ccbaa0bf.tar.bz2 | |
MdePkg/Library: Add RISCV64 support to BaseRngLib
The ratified RISC-V crypto scalar extensions provide entropy bits via the
seed CSR, as exposed by the Zkr extension. The Zkr extension is ratified
and provides 16 bits of entropy seed when reading the SEED CSR.
Guarded by a RISCV64 Feature PCD, 64-bit random numbers can be
accumulated from the `seed` CSR. This driver is based on the driver in
the Linux kernel.
Cc: Liming Gao <gaoliming@byosoft.com.cn>
Cc: Michael D Kinney <michael.d.kinney@intel.com>
Cc: Zhiguang Liu <zhiguang.liu@intel.com>
Signed-off-by: Dhaval Sharma <dhaval@rivosinc.com>
Co-authored-by: Tim Wawrzynczak <tim@rivosinc.com>
Diffstat (limited to 'MdePkg/MdePkg.dec')
| -rw-r--r-- | MdePkg/MdePkg.dec | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/MdePkg/MdePkg.dec b/MdePkg/MdePkg.dec index 5dbe5a9..f8c30d3 100644 --- a/MdePkg/MdePkg.dec +++ b/MdePkg/MdePkg.dec @@ -2430,6 +2430,8 @@ # previous stage has feature enabled and user wants to disable it.
# BIT 2 = Page-Based Memory Types (Pbmt). This bit is relevant only if
# previous stage has feature enabled and user wants to disable it.
+ # BIT 3 = Zkr extension.This bit is relevant only if
+ # previous stage has feature enabled and user wants to disable it.
#
gEfiMdePkgTokenSpaceGuid.PcdRiscVFeatureOverride|0xFFFFFFFFFFFFFFFF|UINT64|0x69
|