github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-01 11:03:43 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

KVM: arm64: Prevent NV feature flag on systems w/o nested virt

Browse Source 
It would appear that userspace can select the NV feature flag regardless
of whether the system actually supports the feature. Obviously a nested
guest isn't getting far in this situation; let's reject the flag
instead.

Link: https://lore.kernel.org/r/20230920195036.1169791-6-oliver.upton@linux.dev
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Oliver Upton 2023-09-20 19:50:33 +00:00
parent baa28a53dd
commit 12405b0992
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
arch/arm64/kvm/arm.c
View File

@ -1208,6 +1208,9 @@ static unsigned long system_supported_vcpu_features(void)
clear_bit(KVM_ARM_VCPU_PTRAUTH_GENERIC, &features);
}
if (!cpus_have_final_cap(ARM64_HAS_NESTED_VIRT))
clear_bit(KVM_ARM_VCPU_HAS_EL2, &features);
return features;
}