KVM: x86/mmu: Only allocate shadowed translation cache for sp->role.level <= KVM_MAX_HUGEPAGE_LEVEL

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Only the indirect SP with sp->role.level <= KVM_MAX_HUGEPAGE_LEVEL might
have leaf gptes, so allocation of shadowed translation cache is needed
only for it. Then, it can use sp->shadowed_translation to determine
whether to use the information in the shadowed translation cache or not.
Also, extend the WARN in FNAME(sync_spte)() to ensure that this won't
break shadow_mmu_get_sp_for_split().

Suggested-by: Lai Jiangshan <jiangshan.ljs@antgroup.com>
Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com>
Link: https://lore.kernel.org/r/5b0cda8a7456cda476b14fca36414a56f921dd52.1715398655.git.houwenlong.hwl@antgroup.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

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Hou Wenlong 2024-05-11 11:46:37 +08:00 • committed by Sean Christopherson

parent 4f8973e65f

commit 9ecc1c119b

2 changed files with 7 additions and 7 deletions

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11

arch/x86/kvm/mmu/mmu.c

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3

arch/x86/kvm/mmu/paging_tmpl.h

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