lkml.org 
[lkml]   [2020]   [Sep]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Date
SubjectRe: [PATCH] KVM: x86: Reset MMU context if guest toggles CR4.SMAP or CR4.PKE
On Wed, Sep 23, 2020 at 2:54 PM Sean Christopherson
<sean.j.christopherson@intel.com> wrote:
>
> Reset the MMU context during kvm_set_cr4() if SMAP or PKE is toggled.
> Recent commits to (correctly) not reload PDPTRs when SMAP/PKE are
> toggled inadvertantly skipped the MMU context reset due to the mask
> of bits that triggers PDPTR loads also being used to trigger MMU context
> resets.
>
> Fixes: 427890aff855 ("kvm: x86: Toggling CR4.SMAP does not load PDPTEs in PAE mode")
> Fixes: cb957adb4ea4 ("kvm: x86: Toggling CR4.PKE does not load PDPTEs in PAE mode")
> Cc: Jim Mattson <jmattson@google.com>
> Cc: Peter Shier <pshier@google.com>
> Cc: Oliver Upton <oupton@google.com>
> Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>

Thanks for the fix!

Reviewed-by: Jim Mattson <jmattson@google.com>

\
 
 \ /
  Last update: 2020-09-24 23:48    [W:0.029 / U:4.728 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site