KVM: x86: MMU: Move parent_pte handling from kvm_mmu_get_page() to link_shadow_page()

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Every time kvm_mmu_get_page() is called with a non-NULL parent_pte
argument, link_shadow_page() follows that to set the parent entry so
that the new mapping will point to the returned page table.

Moving parent_pte handling there allows to clean up the code because
parent_pte is passed to kvm_mmu_get_page() just for mark_unsync() and
mmu_page_add_parent_pte().

In addition, the patch avoids calling mark_unsync() for other parents in
the sp->parent_ptes chain than the newly added parent_pte, because they
have been there since before the current page fault handling started.

Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Cc: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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This commit is contained in:

Takuya Yoshikawa 2015-11-26 21:14:34 +09:00 • committed by Paolo Bonzini

parent 4700579241

commit 98bba23842

2 changed files with 11 additions and 18 deletions

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23

arch/x86/kvm/mmu.c

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6

arch/x86/kvm/paging_tmpl.h

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