diff options
| author | Ben Gardon <bgardon@google.com> | 2020-10-14 11:26:43 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-21 18:17:00 -0400 |
| commit | fe5db27d36017715827e9be7711332d701c6b7de (patch) | |
| tree | a88ab9cf72b0e0e7eade6030235b33f10e505938 /arch/x86/kvm/mmu/mmu.c | |
| parent | c9180b7291cf13a746aaca907b9fdd499cce1e38 (diff) | |
| download | lwn-fe5db27d36017715827e9be7711332d701c6b7de.tar.gz lwn-fe5db27d36017715827e9be7711332d701c6b7de.zip | |
kvm: x86/mmu: Init / Uninit the TDP MMU
The TDP MMU offers an alternative mode of operation to the x86 shadow
paging based MMU, optimized for running an L1 guest with TDP. The TDP MMU
will require new fields that need to be initialized and torn down. Add
hooks into the existing KVM MMU initialization process to do that
initialization / cleanup. Currently the initialization and cleanup
fucntions do not do very much, however more operations will be added in
future patches.
Tested by running kvm-unit-tests and KVM selftests on an Intel Haswell
machine. This series introduced no new failures.
This series can be viewed in Gerrit at:
https://linux-review.googlesource.com/c/virt/kvm/kvm/+/2538
Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20201014182700.2888246-4-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu/mmu.c')
| -rw-r--r-- | arch/x86/kvm/mmu/mmu.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/kvm/mmu/mmu.c b/arch/x86/kvm/mmu/mmu.c index 02af304c168a..2afaf17284bb 100644 --- a/arch/x86/kvm/mmu/mmu.c +++ b/arch/x86/kvm/mmu/mmu.c @@ -19,6 +19,7 @@ #include "ioapic.h" #include "mmu.h" #include "mmu_internal.h" +#include "tdp_mmu.h" #include "x86.h" #include "kvm_cache_regs.h" #include "kvm_emulate.h" @@ -5377,6 +5378,8 @@ void kvm_mmu_init_vm(struct kvm *kvm) { struct kvm_page_track_notifier_node *node = &kvm->arch.mmu_sp_tracker; + kvm_mmu_init_tdp_mmu(kvm); + node->track_write = kvm_mmu_pte_write; node->track_flush_slot = kvm_mmu_invalidate_zap_pages_in_memslot; kvm_page_track_register_notifier(kvm, node); @@ -5387,6 +5390,8 @@ void kvm_mmu_uninit_vm(struct kvm *kvm) struct kvm_page_track_notifier_node *node = &kvm->arch.mmu_sp_tracker; kvm_page_track_unregister_notifier(kvm, node); + + kvm_mmu_uninit_tdp_mmu(kvm); } void kvm_zap_gfn_range(struct kvm *kvm, gfn_t gfn_start, gfn_t gfn_end) |