KVM: x86/mmu: Capture TDP level when updating CPUID

Browse source

Snapshot the TDP level now that it's invariant (SVM) or dependent only
on host capabilities and guest CPUID (VMX).  This avoids having to call
kvm_x86_ops.get_tdp_level() when initializing a TDP MMU and/or
calculating the page role, and thus avoids the associated retpoline.

Drop the WARN in vmx_get_tdp_level() as updating CPUID while L2 is
active is legal, if dodgy.

No functional change intended.

Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200502043234.12481-11-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

This commit is contained in:

Sean Christopherson 2020-05-01 21:32:34 -07:00 • committed by Paolo Bonzini

parent 0047fcade4

commit e93fd3b3e8

5 changed files with 7 additions and 7 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

1

arch/x86/include/asm/kvm_host.h

View file

3

arch/x86/kvm/cpuid.c

View file

6

arch/x86/kvm/mmu/mmu.c

View file

2

arch/x86/kvm/svm/nested.c

View file

2

arch/x86/kvm/vmx/vmx.c

View file