[PATCH 6.1 0/5] KVM CR0.WP series backport

[Mathias Krause <minipli@grsecurity.net>]

This is a backport of the CR0.WP KVM series[1] to Linux v6.1, pretty
much the same as for v6.2.

I used 'ssdd 10 50000' from rt-tests[2] as a micro-benchmark, running on
a grsecurity L1 VM. Below table shows the results (runtime in seconds,
lower is better):

                        legacy     TDP    shadow
    Linux v6.1.23        7.65s    8.23s    68.7s
    + patches            3.36s    3.36s    69.1s

The KVM unit test suite showed no regressions.

Please consider applying.

Thanks,
Mathias

[1] https://lore.kernel.org/kvm/20230322013731.102955-1-minipli@grsecurity.net/
[2] https://git.kernel.org/pub/scm/utils/rt-tests/rt-tests.git


Mathias Krause (3):
  KVM: x86: Do not unload MMU roots when only toggling CR0.WP with TDP
    enabled
  KVM: x86: Make use of kvm_read_cr*_bits() when testing bits
  KVM: VMX: Make CR0.WP a guest owned bit

Paolo Bonzini (1):
  KVM: x86/mmu: Avoid indirect call for get_cr3

Sean Christopherson (1):
  KVM: x86/mmu: Refresh CR0.WP prior to checking for emulated permission
    faults

 arch/x86/kvm/kvm_cache_regs.h  |  2 +-
 arch/x86/kvm/mmu.h             | 26 ++++++++++++++++++-
 arch/x86/kvm/mmu/mmu.c         | 46 ++++++++++++++++++++++++++--------
 arch/x86/kvm/mmu/paging_tmpl.h |  2 +-
 arch/x86/kvm/pmu.c             |  4 +--
 arch/x86/kvm/vmx/nested.c      |  4 +--
 arch/x86/kvm/vmx/vmx.c         |  6 ++---
 arch/x86/kvm/vmx/vmx.h         | 18 +++++++++++++
 arch/x86/kvm/x86.c             | 12 +++++++++
 9 files changed, 99 insertions(+), 21 deletions(-)

-- 
2.39.2