* MDS/SSB Mitigation for pre-Nehalem/Older Intel Hardware?
@ 2019-05-30 9:39 Zdenek Kaspar
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From: Zdenek Kaspar @ 2019-05-30 9:39 UTC (permalink / raw)
To: linux-kernel
Hello everyone,
on old CPU the current situation looks like this:
l1tf:Mitigation: PTE Inversion; VMX: EPT disabled
mds:Vulnerable: Clear CPU buffers attempted, no microcode; SMT disabled
meltdown:Mitigation: PTI
spec_store_bypass:Vulnerable
spectre_v1:Mitigation: __user pointer sanitization
spectre_v2:Mitigation: Full generic retpoline, STIBP: disabled, RSB filling
There's no way to mitigate some issues without microcode
and Intel doesn't provide new updates for old hardware.
The Deep Dive document for MDS includes: "software sequences
to overwrite buffers" but it goes back only to Nehalem.
Are there any plans for software fixes especially for older CPUs?
TIA, Z.
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