Bobby Bruce has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/70657?usp=email )
Change subject: arch-riscv: Fix WFI for O3 CPU
......................................................................
arch-riscv: Fix WFI for O3 CPU
This commit:
https://gem5-review.googlesource.com/c/public/gem5/+/61511
introduced a bug where the O3 CPU hangs. This is because WFI must be
tagged as `IsNonSpeculative` and `IsSerializeAfter` to function
correctly with O3 CPUs.
Change-Id: I8b6cb049710d05f37f89a9ce22acc604112bc445
Issue-on: https://gem5.atlassian.net/browse/GEM5-1323
---
M src/arch/riscv/isa/decoder.isa
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/src/arch/riscv/isa/decoder.isa b/src/arch/riscv/isa/decoder.isa
index f22efb0..e58ceb9 100644
--- a/src/arch/riscv/isa/decoder.isa
+++ b/src/arch/riscv/isa/decoder.isa
@@ -2278,7 +2278,7 @@
&& xc->readMiscReg(MISCREG_NMIP) == 0) {
tc->quiesce();
}
- }}, No_OpClass);
+ }}, IsNonSpeculative, IsSerializeAfter,
No_OpClass);
}
0x9: sfence_vma({{
STATUS status = xc->readMiscReg(MISCREG_STATUS);
--
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Gerrit-MessageType: newchange
Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I8b6cb049710d05f37f89a9ce22acc604112bc445
Gerrit-Change-Number: 70657
Gerrit-PatchSet: 1
Gerrit-Owner: Bobby Bruce <bbr...@ucdavis.edu>
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