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| author | David Matlack <dmatlack@google.com> | 2022-01-13 23:30:19 +0000 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-01-19 12:07:06 -0500 |
| commit | 5f16bcac6e280a7dade580d9627f5cf93ef6aa56 (patch) | |
| tree | c681ede4a333e6ec0fb340f1aa170860667702a6 /tools/perf/scripts/python/export-to-sqlite.py | |
| parent | f082d86ea68559e4bd1ecaffa04981b72281e28f (diff) | |
KVM: x86/mmu: Document and enforce MMU-writable and Host-writable invariants
SPTEs are tagged with software-only bits to indicate if it is
"MMU-writable" and "Host-writable". These bits are used to determine why
KVM has marked an SPTE as read-only.
Document these bits and their invariants, and enforce the invariants
with new WARNs in spte_can_locklessly_be_made_writable() to ensure they
are not accidentally violated in the future.
Opportunistically move DEFAULT_SPTE_{MMU,HOST}_WRITABLE next to
EPT_SPTE_{MMU,HOST}_WRITABLE since the new documentation applies to
both.
No functional change intended.
Signed-off-by: David Matlack <dmatlack@google.com>
Message-Id: <20220113233020.3986005-4-dmatlack@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/perf/scripts/python/export-to-sqlite.py')
0 files changed, 0 insertions, 0 deletions