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From: Avi Kivity <avi@redhat.com>
To: Marcelo Tosatti <mtosatti@redhat.com>
Cc: kvm@vger.kernel.org
Subject: [PATCH 2/3] KVM: MMU: Adjust pte accessors to explicitly indicate guest or shadow pte
Date: Wed, 10 Jun 2009 14:28:21 +0300	[thread overview]
Message-ID: <1244633302-27545-3-git-send-email-avi@redhat.com> (raw)
In-Reply-To: <1244633302-27545-1-git-send-email-avi@redhat.com>

Since the guest and host ptes can have wildly different format, adjust
the pte accessor names to indicate on which type of pte they operate on.

No functional changes.

Signed-off-by: Avi Kivity <avi@redhat.com>
---
 arch/x86/kvm/mmu.c         |   16 ++++++++--------
 arch/x86/kvm/mmu.h         |    2 +-
 arch/x86/kvm/paging_tmpl.h |   22 +++++++++++-----------
 arch/x86/kvm/x86.c         |    2 +-
 4 files changed, 21 insertions(+), 21 deletions(-)

diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c
index 8e5003c..415630d 100644
--- a/arch/x86/kvm/mmu.c
+++ b/arch/x86/kvm/mmu.c
@@ -240,12 +240,12 @@ static int is_writeble_pte(unsigned long pte)
 	return pte & PT_WRITABLE_MASK;
 }
 
-static int is_dirty_pte(unsigned long pte)
+static int is_dirty_gpte(unsigned long pte)
 {
 	return pte & PT_DIRTY_MASK;
 }
 
-static int is_rmap_pte(u64 pte)
+static int is_rmap_spte(u64 pte)
 {
 	return is_shadow_present_pte(pte);
 }
@@ -498,7 +498,7 @@ static void rmap_add(struct kvm_vcpu *vcpu, u64 *spte, gfn_t gfn, int lpage)
 	unsigned long *rmapp;
 	int i;
 
-	if (!is_rmap_pte(*spte))
+	if (!is_rmap_spte(*spte))
 		return;
 	gfn = unalias_gfn(vcpu->kvm, gfn);
 	sp = page_header(__pa(spte));
@@ -560,7 +560,7 @@ static void rmap_remove(struct kvm *kvm, u64 *spte)
 	unsigned long *rmapp;
 	int i;
 
-	if (!is_rmap_pte(*spte))
+	if (!is_rmap_spte(*spte))
 		return;
 	sp = page_header(__pa(spte));
 	pfn = spte_to_pfn(*spte);
@@ -1747,7 +1747,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
 		 __func__, *shadow_pte, pt_access,
 		 write_fault, user_fault, gfn);
 
-	if (is_rmap_pte(*shadow_pte)) {
+	if (is_rmap_spte(*shadow_pte)) {
 		/*
 		 * If we overwrite a PTE page pointer with a 2MB PMD, unlink
 		 * the parent of the now unreachable PTE.
@@ -1783,7 +1783,7 @@ static void mmu_set_spte(struct kvm_vcpu *vcpu, u64 *shadow_pte,
 	page_header_update_slot(vcpu->kvm, shadow_pte, gfn);
 	if (!was_rmapped) {
 		rmap_add(vcpu, shadow_pte, gfn, largepage);
-		if (!is_rmap_pte(*shadow_pte))
+		if (!is_rmap_spte(*shadow_pte))
 			kvm_release_pfn_clean(pfn);
 	} else {
 		if (was_writeble)
@@ -1960,7 +1960,7 @@ static int mmu_alloc_roots(struct kvm_vcpu *vcpu)
 		ASSERT(!VALID_PAGE(root));
 		if (vcpu->arch.mmu.root_level == PT32E_ROOT_LEVEL) {
 			pdptr = kvm_pdptr_read(vcpu, i);
-			if (!is_present_pte(pdptr)) {
+			if (!is_present_gpte(pdptr)) {
 				vcpu->arch.mmu.pae_root[i] = 0;
 				continue;
 			}
@@ -2451,7 +2451,7 @@ static void mmu_guess_page_from_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
 		if ((bytes == 4) && (gpa % 4 == 0))
 			memcpy((void *)&gpte, new, 4);
 	}
-	if (!is_present_pte(gpte))
+	if (!is_present_gpte(gpte))
 		return;
 	gfn = (gpte & PT64_BASE_ADDR_MASK) >> PAGE_SHIFT;
 
diff --git a/arch/x86/kvm/mmu.h b/arch/x86/kvm/mmu.h
index 3494a2f..016bf71 100644
--- a/arch/x86/kvm/mmu.h
+++ b/arch/x86/kvm/mmu.h
@@ -75,7 +75,7 @@ static inline int is_paging(struct kvm_vcpu *vcpu)
 	return vcpu->arch.cr0 & X86_CR0_PG;
 }
 
-static inline int is_present_pte(unsigned long pte)
+static inline int is_present_gpte(unsigned long pte)
 {
 	return pte & PT_PRESENT_MASK;
 }
diff --git a/arch/x86/kvm/paging_tmpl.h b/arch/x86/kvm/paging_tmpl.h
index 4cb1dbf..238a193 100644
--- a/arch/x86/kvm/paging_tmpl.h
+++ b/arch/x86/kvm/paging_tmpl.h
@@ -132,7 +132,7 @@ walk:
 #if PTTYPE == 64
 	if (!is_long_mode(vcpu)) {
 		pte = kvm_pdptr_read(vcpu, (addr >> 30) & 3);
-		if (!is_present_pte(pte))
+		if (!is_present_gpte(pte))
 			goto not_present;
 		--walker->level;
 	}
@@ -155,7 +155,7 @@ walk:
 
 		kvm_read_guest(vcpu->kvm, pte_gpa, &pte, sizeof(pte));
 
-		if (!is_present_pte(pte))
+		if (!is_present_gpte(pte))
 			goto not_present;
 
 		rsvd_fault = is_rsvd_bits_set(vcpu, pte, walker->level);
@@ -205,7 +205,7 @@ walk:
 		--walker->level;
 	}
 
-	if (write_fault && !is_dirty_pte(pte)) {
+	if (write_fault && !is_dirty_gpte(pte)) {
 		bool ret;
 
 		mark_page_dirty(vcpu->kvm, table_gfn);
@@ -252,7 +252,7 @@ static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *page,
 
 	gpte = *(const pt_element_t *)pte;
 	if (~gpte & (PT_PRESENT_MASK | PT_ACCESSED_MASK)) {
-		if (!is_present_pte(gpte))
+		if (!is_present_gpte(gpte))
 			set_shadow_pte(spte, shadow_notrap_nonpresent_pte);
 		return;
 	}
@@ -289,7 +289,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
 	pt_element_t curr_pte;
 	struct kvm_shadow_walk_iterator iterator;
 
-	if (!is_present_pte(gw->ptes[gw->level - 1]))
+	if (!is_present_gpte(gw->ptes[gw->level - 1]))
 		return NULL;
 
 	for_each_shadow_entry(vcpu, addr, iterator) {
@@ -318,7 +318,7 @@ static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
 		if (level == PT_DIRECTORY_LEVEL
 		    && gw->level == PT_DIRECTORY_LEVEL) {
 			direct = 1;
-			if (!is_dirty_pte(gw->ptes[level - 1]))
+			if (!is_dirty_gpte(gw->ptes[level - 1]))
 				access &= ~ACC_WRITE_MASK;
 			table_gfn = gpte_to_gfn(gw->ptes[level - 1]);
 		} else {
@@ -489,7 +489,7 @@ static void FNAME(invlpg)(struct kvm_vcpu *vcpu, gva_t gva)
 	if (kvm_read_guest_atomic(vcpu->kvm, pte_gpa, &gpte,
 				  sizeof(pt_element_t)))
 		return;
-	if (is_present_pte(gpte) && (gpte & PT_ACCESSED_MASK)) {
+	if (is_present_gpte(gpte) && (gpte & PT_ACCESSED_MASK)) {
 		if (mmu_topup_memory_caches(vcpu))
 			return;
 		kvm_mmu_pte_write(vcpu, pte_gpa, (const u8 *)&gpte,
@@ -536,7 +536,7 @@ static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu,
 		r = kvm_read_guest_atomic(vcpu->kvm, pte_gpa, pt, sizeof pt);
 		pte_gpa += ARRAY_SIZE(pt) * sizeof(pt_element_t);
 		for (j = 0; j < ARRAY_SIZE(pt); ++j)
-			if (r || is_present_pte(pt[j]))
+			if (r || is_present_gpte(pt[j]))
 				sp->spt[i+j] = shadow_trap_nonpresent_pte;
 			else
 				sp->spt[i+j] = shadow_notrap_nonpresent_pte;
@@ -574,12 +574,12 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
 					  sizeof(pt_element_t)))
 			return -EINVAL;
 
-		if (gpte_to_gfn(gpte) != gfn || !is_present_pte(gpte) ||
+		if (gpte_to_gfn(gpte) != gfn || !is_present_gpte(gpte) ||
 		    !(gpte & PT_ACCESSED_MASK)) {
 			u64 nonpresent;
 
 			rmap_remove(vcpu->kvm, &sp->spt[i]);
-			if (is_present_pte(gpte))
+			if (is_present_gpte(gpte))
 				nonpresent = shadow_trap_nonpresent_pte;
 			else
 				nonpresent = shadow_notrap_nonpresent_pte;
@@ -590,7 +590,7 @@ static int FNAME(sync_page)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp)
 		nr_present++;
 		pte_access = sp->role.access & FNAME(gpte_access)(vcpu, gpte);
 		set_spte(vcpu, &sp->spt[i], pte_access, 0, 0,
-			 is_dirty_pte(gpte), 0, gfn,
+			 is_dirty_gpte(gpte), 0, gfn,
 			 spte_to_pfn(sp->spt[i]), true, false);
 	}
 
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 272e2e8..ff1add8 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -237,7 +237,7 @@ int load_pdptrs(struct kvm_vcpu *vcpu, unsigned long cr3)
 		goto out;
 	}
 	for (i = 0; i < ARRAY_SIZE(pdpte); ++i) {
-		if (is_present_pte(pdpte[i]) &&
+		if (is_present_gpte(pdpte[i]) &&
 		    (pdpte[i] & vcpu->arch.mmu.rsvd_bits_mask[0][2])) {
 			ret = 0;
 			goto out;
-- 
1.6.0.6


  parent reply	other threads:[~2009-06-10 11:28 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2009-06-10 11:28 [PATCH 0/3] pte accessor fixes Avi Kivity
2009-06-10 11:28 ` [PATCH 1/3] KVM: MMU: Fix is_dirty_pte() Avi Kivity
2009-06-10 11:28 ` Avi Kivity [this message]
2009-06-10 11:28 ` [PATCH 3/3] KVM: MMU: s/shadow_pte/spte/ Avi Kivity
2009-06-10 12:39 ` [PATCH 0/3] pte accessor fixes Marcelo Tosatti
2009-06-10 12:40   ` Avi Kivity

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