KVM virtualisation broken with kernel 5.15


Aug 6, 2020
I've recently update proxmox to V7.
Everythings was fine until i do a reboot, i need to do it for a kernel update.

Since this last update, i've message on the boot :

ACPI: SPCR: Unexpected SPCR access Width. Defaulting to byte size
DMAR: [fimware bug] : No firmware reserved region can cover this RMRR [ .....
[fimware bug] : the bios has corrupted hw-PMU ressources (MSR 38d is 330)
x86/cpu: VMX (outside TXT) disabled by bios
DMAR: DRHD: handling fault status reg 2
DMAR: [INTR-REMAP] request device [01:00.0] fault index 0x32 [fault reason 0x26] blocked an interrupt request due to source-id verification failure

The consequence is that i can't run my VM using host as processeur.
I need to put "KVM hardware virtualisation" to NO and choose kvm64 as processeur to launch the VM. I loose lot of performance !

My machine is an HPe DL380p Gen8 with 2 Xeon E5 2630
Kernel version : Linux 5.15.108-1-pve #1 SMP PVE 5.15.108-2
PVE version : pve-manager/7.4-16/0f39f621
VT is enabled in bios, i did an update for the bios.


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