kvm: x86/mmu: Add TDP MMU PF handler

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Add functions to handle page faults in the TDP MMU. These page faults
are currently handled in much the same way as the x86 shadow paging
based MMU, however the ordering of some operations is slightly
different. Future patches will add eager NX splitting, a fast page fault
handler, and parallel page faults.

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: <20201014182700.2888246-11-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

...

This commit is contained in:

Ben Gardon 2020-10-14 11:26:50 -07:00 • committed by Paolo Bonzini

parent 7d94531249

commit bb18842e21

5 changed files with 194 additions and 37 deletions

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53

arch/x86/kvm/mmu/mmu.c

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32

arch/x86/kvm/mmu/mmu_internal.h

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8

arch/x86/kvm/mmu/mmutrace.h

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134

arch/x86/kvm/mmu/tdp_mmu.c

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4

arch/x86/kvm/mmu/tdp_mmu.h

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