AcoSail/kernel_optimize_test
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KVM: MMU: Introduce is_last_gpte() to clean up walk_addr_generic()

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Suggested by Ingo and Avi.

Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Takuya Yoshikawa 2011-07-01 01:37:24 +09:00 committed by Avi Kivity
parent 92c1c1e85b
commit 3c8c652ae4
1 changed files with 19 additions and 7 deletions
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26
arch/x86/kvm/paging_tmpl.h
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@ -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;