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Date: Sun, 1 Apr 2007 17:35:19 +0300 From: Avi Kivity <avi@...ranet.com> To: kvm-devel@...ts.sourceforge.net Cc: linux-kernel@...r.kernel.org, Avi Kivity <avi@...ranet.com> Subject: [PATCH 22/41] KVM: MMU: Remove global pte tracking The initial, noncaching, version of the kvm mmu flushed the all nonglobal shadow page table translations (much like a native tlb flush). The new implementation flushes translations only when they change, rendering global pte tracking superfluous. This removes the unused tracking mechanism and storage space. Signed-off-by: Avi Kivity <avi@...ranet.com> --- drivers/kvm/kvm.h | 1 - drivers/kvm/mmu.c | 9 --------- 2 files changed, 0 insertions(+), 10 deletions(-) diff --git a/drivers/kvm/kvm.h b/drivers/kvm/kvm.h index 7866b34..a4331da 100644 --- a/drivers/kvm/kvm.h +++ b/drivers/kvm/kvm.h @@ -136,7 +136,6 @@ struct kvm_mmu_page { unsigned long slot_bitmap; /* One bit set per slot which has memory * in this shadow page. */ - int global; /* Set if all ptes in this page are global */ int multimapped; /* More than one parent_pte? */ int root_count; /* Currently serving as active root */ union { diff --git a/drivers/kvm/mmu.c b/drivers/kvm/mmu.c index e8e2750..b181106 100644 --- a/drivers/kvm/mmu.c +++ b/drivers/kvm/mmu.c @@ -461,7 +461,6 @@ static struct kvm_mmu_page *kvm_mmu_alloc_page(struct kvm_vcpu *vcpu, list_add(&page->link, &vcpu->kvm->active_mmu_pages); ASSERT(is_empty_shadow_page(page->page_hpa)); page->slot_bitmap = 0; - page->global = 1; page->multimapped = 0; page->parent_pte = parent_pte; --vcpu->kvm->n_free_mmu_pages; @@ -927,11 +926,6 @@ static void paging_new_cr3(struct kvm_vcpu *vcpu) kvm_arch_ops->set_cr3(vcpu, vcpu->mmu.root_hpa); } -static void mark_pagetable_nonglobal(void *shadow_pte) -{ - page_header(__pa(shadow_pte))->global = 0; -} - static inline void set_pte_common(struct kvm_vcpu *vcpu, u64 *shadow_pte, gpa_t gaddr, @@ -949,9 +943,6 @@ static inline void set_pte_common(struct kvm_vcpu *vcpu, *shadow_pte |= access_bits; - if (!(*shadow_pte & PT_GLOBAL_MASK)) - mark_pagetable_nonglobal(shadow_pte); - if (is_error_hpa(paddr)) { *shadow_pte |= gaddr; *shadow_pte |= PT_SHADOW_IO_MARK; -- 1.5.0.5 - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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