tree 15d4515c7f5fc2d3d34fae93b9fe58a1b5453e2b
parent 65bc9b327568b5b4dd7a5142c385575d32e988b1
author Madhukar Pappireddy <madhukar.pappireddy@arm.com> 1582742225 -0600
committer Madhukar Pappireddy <madhukar.pappireddy@arm.com> 1583066670 -0600

aarch32: stop speculative execution past exception returns

aarch32 CPUs speculatively execute instructions following a
ERET as if it was not a jump instruction. This could lead to
cache-based side channel vulnerabilities. The software fix is
to place barrier instructions following ERET.

The counterpart patch for aarch64 is merged:
https://git.trustedfirmware.org/TF-A/trusted-firmware-a.git/commit/?id=f461fe346b728d0e88142fd7b8f2816415af18bc

Change-Id: I2aa3105bee0b92238f389830b3a3b8650f33af3d
Signed-off-by: Madhukar Pappireddy <madhukar.pappireddy@arm.com>