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| author | Jinu Kim <kimjw04271234@gmail.com> | 2026-07-21 19:35:12 +0900 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2026-07-28 18:07:18 +0200 |
| commit | 2e8a2c1b03068d76782343446f1b2114ae2ee0bd (patch) | |
| tree | d1e0c427ec19ad134582690b37d77dbb7d3bcb9a /scripts/livepatch | |
| parent | 0f38453cdb2e17566ccb7c0f3dabd5bd21caca26 (diff) | |
KVM: x86/mmu: Check all address spaces before skipping unsync
mmu_try_to_unsync_pages() skips the shadow-page lookup when the
supplied memslot allows a hugepage, because a shadow page would disallow
hugepages. But hugepage metadata is per-address-space while shadow pages
are shared across all address spaces. With SMM, the other address space
can therefore have a shadow page even when the supplied memslot allows a
hugepage.
Check the corresponding memslot in the other address space before
taking the fast path. Skip the shadow-page lookup only when all address
spaces allow a hugepage.
Fixes: b3ae3ceb5569 ("KVM: x86/mmu: KVM: x86/mmu: Skip unsync when large pages are allowed")
Assisted-by: Codex:GPT-5
Signed-off-by: Jinu Kim <kimjw04271234@gmail.com>
[invert direction of the conditional. - Paolo]
Message-ID: <20260721103512.2136240-3-kimjw04271234@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'scripts/livepatch')
0 files changed, 0 insertions, 0 deletions