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Commit 3c8c652a authored by Takuya Yoshikawa's avatar Takuya Yoshikawa Committed by Avi Kivity
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KVM: MMU: Introduce is_last_gpte() to clean up walk_addr_generic()



Suggested by Ingo and Avi.

Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: default avatarTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
parent 92c1c1e8
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+19 −7
Original line number Diff line number Diff line
@@ -113,6 +113,24 @@ static unsigned FNAME(gpte_access)(struct kvm_vcpu *vcpu, pt_element_t gpte)
	return access;
}

static bool FNAME(is_last_gpte)(struct guest_walker *walker,
				struct kvm_vcpu *vcpu, struct kvm_mmu *mmu,
				pt_element_t gpte)
{
	if (walker->level == PT_PAGE_TABLE_LEVEL)
		return true;

	if ((walker->level == PT_DIRECTORY_LEVEL) && is_large_pte(gpte) &&
	    (PTTYPE == 64 || is_pse(vcpu)))
		return true;

	if ((walker->level == PT_PDPE_LEVEL) && is_large_pte(gpte) &&
	    (mmu->root_level == PT64_ROOT_LEVEL))
		return true;

	return false;
}

/*
 * Fetch a guest pte for a guest virtual address
 */
@@ -221,13 +239,7 @@ static int FNAME(walk_addr_generic)(struct guest_walker *walker,

		walker->ptes[walker->level - 1] = pte;

		if ((walker->level == PT_PAGE_TABLE_LEVEL) ||
		    ((walker->level == PT_DIRECTORY_LEVEL) &&
				is_large_pte(pte) &&
				(PTTYPE == 64 || is_pse(vcpu))) ||
		    ((walker->level == PT_PDPE_LEVEL) &&
				is_large_pte(pte) &&
				mmu->root_level == PT64_ROOT_LEVEL)) {
		if (FNAME(is_last_gpte)(walker, vcpu, mmu, pte)) {
			int lvl = walker->level;
			gpa_t real_gpa;
			gfn_t gfn;