Hello,

i haven't found anything on the web regarding qemu and mentioned variants.

While my host says:
l1tf:Mitigation: PTE Inversion; VMX: SMT vulnerable, L1D conditional
cache flushes
meltdown:Mitigation: PTI
spec_store_bypass:Mitigation: Speculative Store Bypass disabled via
prctl and seccomp
spectre_v1:Mitigation: __user pointer sanitization
spectre_v2:Mitigation: Full generic retpoline, IBPB, IBRS_FW

My guests bootet with pcid and spec-ctrl only say:
l1tf:Mitigation: PTE Inversion
meltdown:Mitigation: PTI
spec_store_bypass:Vulnerable
spectre_v1:Mitigation: __user pointer sanitization
spectre_v2:Mitigation: Full generic retpoline, IBPB

* What is about spec_store_bypass in Qemu?
* What is about IBRS_FW feature?
* What is about L1TF?

Or are those just irrelevant to Qemu guests? Would be great to have some
informations.

Thanks a lot!

Greets,
Stefan

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