kvm: x86/mmu: Add TDP MMU SPTE changed trace point

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Add an extremely verbose trace point to the TDP MMU to log all SPTE
changes, regardless of callstack / motivation. This is useful when a
complete picture of the paging structure is needed or a change cannot be
explained with the other, existing trace points.

Tested: ran the demand paging selftest on an Intel Skylake machine with
	all the trace points used by the TDP MMU enabled and observed
	them firing with expected values.

This patch can be viewed in Gerrit at:
https://linux-review.googlesource.com/c/virt/kvm/kvm/+/3813

Signed-off-by: Ben Gardon <bgardon@google.com>
Message-Id: <20201027175944.1183301-2-bgardon@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Ben Gardon 2020-10-27 10:59:44 -07:00 • committed by Paolo Bonzini

parent 33dd3574f5

commit b9a98c3437

2 changed files with 31 additions and 0 deletions

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29

arch/x86/kvm/mmu/mmutrace.h

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2

arch/x86/kvm/mmu/tdp_mmu.c

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