kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-10-31 05:15:34 +00:00
Code Issues Releases Packages Activity

KVM VMX changes for 6.15

Browse source 
- Fix a bug where KVM unnecessarily reads XFD_ERR from hardware and thus
    modifies the vCPU's XFD_ERR on a #NM due to CR0.TS=1.
 
  - Pass XFD_ERR as a psueo-payload when injecting #NM as a preparatory step
    for upcoming FRED virtualization support.
 
  - Decouple the EPT entry RWX protection bit macros from the EPT Violation bits
    as a general cleanup, and in anticipation of adding support for emulating
    Mode-Based Execution (MBEC).
 
  - Reject KVM_RUN if userspace manages to gain control and stuff invalid guest
    state while KVM is in the middle of emulating nested VM-Enter.
 
  - Add a macro to handle KVM's sanity checks on entry/exit VMCS control pairs
    in anticipation of adding sanity checks for secondary exit controls (the
    primary field is out of bits).
 -----BEGIN PGP SIGNATURE-----
 
 iQIzBAABCgAdFiEEKTobbabEP7vbhhN9OlYIJqCjN/0FAmfZosAACgkQOlYIJqCj
 N/0pSA/9FTKQ8hzBinHc5ae+FPhbmAmSgX9X1Gge2cDWF8OYD1yR3ySEdPRGOalz
 oRhhO9pnXeNDbGeps8TFqoRhydcXRyp8AiDATFKky5kFk9vyKxDR26bXrM8nWGgI
 WZS/txkae/Bt5P63IViaGBIbWjXlfKP2wtAOrv676e//SGtZ22K0QUOUuBNETD1F
 txs2vHOUC7S9q+hIo95I4WZJGA4Ih7ZMlfGr1hrPGASHMG0AUozaouN8CEHFWecH
 uutpeVAcYtLiZbsl19L+M6wHr0TeRYo0d5Rcw/zH1XeTZ+zLoF27PJ6PHwx7QmVs
 C0mNzW+2cNjEYpzEDFxo+EkiWXagJ0m9pWlne6PKb92WtX+l5+x5abxVSF86lCy9
 X46wtm/FJ3DyfZ8yuLJXX2c2TOHVNNPUOS/dmAKrv3i1t2kG90yKRX+P9m0k9L1i
 f1IcyhIy4hrkSz+OVRG07mf7VeXUjklWfjIOsAYGBiQRyTbD+8PU1pgDRXWC9mPw
 tgvOgnnDKaS8POHak5DGb3kfdISVztNUM5Dg4GV7fZYqy8E37cdjo1PHk71xmksU
 lPN5U1wSX5MkAyqzrFz+LAZlgoIAvDmbPclWVACbwwRIo7IvbAjwsfE+8JyO5DPX
 T8mvd6C+A2K8GqkQTpjx8leXEDRSZiuV63dscSoAMEr+NbSudi4=
 =SAgZ
 -----END PGP SIGNATURE-----

Merge tag 'kvm-x86-vmx-6.15' of https://github.com/kvm-x86/linux into HEAD

KVM VMX changes for 6.15

 - Fix a bug where KVM unnecessarily reads XFD_ERR from hardware and thus
   modifies the vCPU's XFD_ERR on a #NM due to CR0.TS=1.

 - Pass XFD_ERR as a psueo-payload when injecting #NM as a preparatory step
   for upcoming FRED virtualization support.

 - Decouple the EPT entry RWX protection bit macros from the EPT Violation bits
   as a general cleanup, and in anticipation of adding support for emulating
   Mode-Based Execution (MBEC).

 - Reject KVM_RUN if userspace manages to gain control and stuff invalid guest
   state while KVM is in the middle of emulating nested VM-Enter.

 - Add a macro to handle KVM's sanity checks on entry/exit VMCS control pairs
   in anticipation of adding sanity checks for secondary exit controls (the
   primary field is out of bits).
This commit is contained in:
Paolo Bonzini 2025-03-19 09:05:52 -04:00
commit a24dbf986b
3 changed files with 92 additions and 45 deletions
Download patch file Download diff file Expand all files Collapse all files