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Enable kvm-intel.vmentry_l1d_flush=always

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raja-grewal 2024-12-17 11:42:52 +00:00 committed by GitHub
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etc/default/grub.d/40_cpu_mitigations.cfg
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@ -66,11 +66,13 @@ GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX ssbd=force-on"
## L1 Terminal Fault (L1TF): ## L1 Terminal Fault (L1TF):
## Mitigate the vulnerability by disabling L1D flush runtime control and SMT. ## Mitigate the vulnerability by disabling L1D flush runtime control and SMT.
## If conditional L1D flushing, mitigate the vulnerability for certain KVM hypervisor configurations.
## Currently affects Intel CPUs. ## Currently affects Intel CPUs.
## ##
## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html ## https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html
## ##
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX l1tf=full,force" GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX l1tf=full,force"
GRUB_CMDLINE_LINUX="$GRUB_CMDLINE_LINUX kvm-intel.vmentry_l1d_flush=always"
## Microarchitectural Data Sampling (MDS): ## Microarchitectural Data Sampling (MDS):
## Mitigate the vulnerability by clearing the buffer cache and disabling SMT. ## Mitigate the vulnerability by clearing the buffer cache and disabling SMT.