Cheri-research/Toooba
1
0
Fork 0
Code Issues 1 Pull Requests Actions Packages Projects Releases Wiki Activity

Guard Meltdown_CF protection (such as it is) with ifdef rather than just

Browse Source 
comment it out.
This commit is contained in:
jon
2021-05-04 11:29:36 +01:00
parent 2dccf1b557
commit b8d86df2d0
1 changed files with 3 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

5
src_Core/RISCY_OOO/procs/RV64G_OOO/AluExePipeline.bsv
View File

@@ -327,9 +327,10 @@ module mkAluExePipeline#(AluExeInput inIfc)(AluExePipeline);
doAssert(!exec_result.controlFlow.mispredict, "Scr inst cannot mispredict");
doAssert(cast(exec_result.controlFlow.nextPc) == x.ppc && x.ppc == addPc(x.pc, 4), "Scr inst ppc = pc+4");
end
`ifdef MELTDOWN_CF_MITIGATION
// This condition can eliminate Meltdown-CF vulnerabilities for exception conditions that don't need the bounds check result.
//if (isValid(exec_result.capException)) exec_result.data = setValidCap(exec_result.data, False);
if (isValid(exec_result.capException)) exec_result.data = setValidCap(exec_result.data, False);
`endif
// send bypass
if(x.dst matches tagged Valid .dst) begin
inIfc.sendBypass[exeSendBypassPort].send(dst.indx, exec_result.data);