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| author |   Vitaly Kuznetsov <vkuznets@redhat.com> | 2018-10-08 21:28:11 +0200 |
|---|---|---|
| committer |   Paolo Bonzini <pbonzini@redhat.com> | 2018-10-17 00:30:06 +0200 |
| commit | a336282d7753a92ced7b8e52ff959929f6e550ff (patch) | |
| tree | 8eef48cca30f0e1d0a860eb932c5dc1c74e2762a /arch/x86/include/asm/kvm_host.h | |
| parent | x86/kvm/mmu: make space for source data caching in struct kvm_mmu (diff) | |
| download | linux-dev-a336282d7753a92ced7b8e52ff959929f6e550ff.tar.xz linux-dev-a336282d7753a92ced7b8e52ff959929f6e550ff.zip | |
x86/kvm/nVMX: introduce source data cache for kvm_init_shadow_ept_mmu()
MMU re-initialization is expensive, in particular,
update_permission_bitmask() and update_pkru_bitmask() are.
Cache the data used to setup shadow EPT MMU and avoid full re-init when
it is unchanged.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/kvm_host.h')
| -rw-r--r-- | arch/x86/include/asm/kvm_host.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 51ce635494b0..bf541af7442d 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -283,7 +283,21 @@ union kvm_mmu_page_role { }; union kvm_mmu_extended_role { +/* + * This structure complements kvm_mmu_page_role caching everything needed for + * MMU configuration. If nothing in both these structures changed, MMU + * re-configuration can be skipped. @valid bit is set on first usage so we don't + * treat all-zero structure as valid data. + */ u32 word; + struct { + unsigned int valid:1; + unsigned int execonly:1; + unsigned int cr4_pse:1; + unsigned int cr4_pke:1; + unsigned int cr4_smap:1; + unsigned int cr4_smep:1; + }; }; union kvm_mmu_role { |