1 files changed, 0 insertions, 461 deletions

diff --git a/drivers/kvm/paging_tmpl.h b/drivers/kvm/paging_tmpl.h
deleted file mode 100644
index 56b88f7e83ef..000000000000
--- a/drivers/kvm/paging_tmpl.h
+++ /dev/null
@@ -1,461 +0,0 @@
-/*
- * Kernel-based Virtual Machine driver for Linux
- *
- * This module enables machines with Intel VT-x extensions to run virtual
- * machines without emulation or binary translation.
- *
- * MMU support
- *
- * Copyright (C) 2006 Qumranet, Inc.
- *
- * Authors:
- *   Yaniv Kamay  <yaniv@qumranet.com>
- *   Avi Kivity   <avi@qumranet.com>
- *
- * This work is licensed under the terms of the GNU GPL, version 2.  See
- * the COPYING file in the top-level directory.
- *
- */
-
-/*
- * We need the mmu code to access both 32-bit and 64-bit guest ptes,
- * so the code in this file is compiled twice, once per pte size.
- */
-
-#if PTTYPE == 64
-	#define pt_element_t u64
-	#define guest_walker guest_walker64
-	#define FNAME(name) paging##64_##name
-	#define PT_BASE_ADDR_MASK PT64_BASE_ADDR_MASK
-	#define PT_DIR_BASE_ADDR_MASK PT64_DIR_BASE_ADDR_MASK
-	#define PT_INDEX(addr, level) PT64_INDEX(addr, level)
-	#define SHADOW_PT_INDEX(addr, level) PT64_INDEX(addr, level)
-	#define PT_LEVEL_MASK(level) PT64_LEVEL_MASK(level)
-	#define PT_LEVEL_BITS PT64_LEVEL_BITS
-	#ifdef CONFIG_X86_64
-	#define PT_MAX_FULL_LEVELS 4
-	#define CMPXCHG cmpxchg
-	#else
-	#define CMPXCHG cmpxchg64
-	#define PT_MAX_FULL_LEVELS 2
-	#endif
-#elif PTTYPE == 32
-	#define pt_element_t u32
-	#define guest_walker guest_walker32
-	#define FNAME(name) paging##32_##name
-	#define PT_BASE_ADDR_MASK PT32_BASE_ADDR_MASK
-	#define PT_DIR_BASE_ADDR_MASK PT32_DIR_BASE_ADDR_MASK
-	#define PT_INDEX(addr, level) PT32_INDEX(addr, level)
-	#define SHADOW_PT_INDEX(addr, level) PT64_INDEX(addr, level)
-	#define PT_LEVEL_MASK(level) PT32_LEVEL_MASK(level)
-	#define PT_LEVEL_BITS PT32_LEVEL_BITS
-	#define PT_MAX_FULL_LEVELS 2
-	#define CMPXCHG cmpxchg
-#else
-	#error Invalid PTTYPE value
-#endif
-
-#define gpte_to_gfn FNAME(gpte_to_gfn)
-#define gpte_to_gfn_pde FNAME(gpte_to_gfn_pde)
-
-/*
- * The guest_walker structure emulates the behavior of the hardware page
- * table walker.
- */
-struct guest_walker {
-	int level;
-	gfn_t table_gfn[PT_MAX_FULL_LEVELS];
-	pt_element_t ptes[PT_MAX_FULL_LEVELS];
-	gpa_t pte_gpa[PT_MAX_FULL_LEVELS];
-	unsigned pt_access;
-	unsigned pte_access;
-	gfn_t gfn;
-	u32 error_code;
-};
-
-static gfn_t gpte_to_gfn(pt_element_t gpte)
-{
-	return (gpte & PT_BASE_ADDR_MASK) >> PAGE_SHIFT;
-}
-
-static gfn_t gpte_to_gfn_pde(pt_element_t gpte)
-{
-	return (gpte & PT_DIR_BASE_ADDR_MASK) >> PAGE_SHIFT;
-}
-
-static bool FNAME(cmpxchg_gpte)(struct kvm *kvm,
-			 gfn_t table_gfn, unsigned index,
-			 pt_element_t orig_pte, pt_element_t new_pte)
-{
-	pt_element_t ret;
-	pt_element_t *table;
-	struct page *page;
-
-	page = gfn_to_page(kvm, table_gfn);
-	table = kmap_atomic(page, KM_USER0);
-
-	ret = CMPXCHG(&table[index], orig_pte, new_pte);
-
-	kunmap_atomic(table, KM_USER0);
-
-	kvm_release_page_dirty(page);
-
-	return (ret != orig_pte);
-}
-
-static unsigned FNAME(gpte_access)(struct kvm_vcpu *vcpu, pt_element_t gpte)
-{
-	unsigned access;
-
-	access = (gpte & (PT_WRITABLE_MASK | PT_USER_MASK)) | ACC_EXEC_MASK;
-#if PTTYPE == 64
-	if (is_nx(vcpu))
-		access &= ~(gpte >> PT64_NX_SHIFT);
-#endif
-	return access;
-}
-
-/*
- * Fetch a guest pte for a guest virtual address
- */
-static int FNAME(walk_addr)(struct guest_walker *walker,
-			    struct kvm_vcpu *vcpu, gva_t addr,
-			    int write_fault, int user_fault, int fetch_fault)
-{
-	pt_element_t pte;
-	gfn_t table_gfn;
-	unsigned index, pt_access, pte_access;
-	gpa_t pte_gpa;
-
-	pgprintk("%s: addr %lx\n", __FUNCTION__, addr);
-walk:
-	walker->level = vcpu->arch.mmu.root_level;
-	pte = vcpu->arch.cr3;
-#if PTTYPE == 64
-	if (!is_long_mode(vcpu)) {
-		pte = vcpu->arch.pdptrs[(addr >> 30) & 3];
-		if (!is_present_pte(pte))
-			goto not_present;
-		--walker->level;
-	}
-#endif
-	ASSERT((!is_long_mode(vcpu) && is_pae(vcpu)) ||
-	       (vcpu->cr3 & CR3_NONPAE_RESERVED_BITS) == 0);
-
-	pt_access = ACC_ALL;
-
-	for (;;) {
-		index = PT_INDEX(addr, walker->level);
-
-		table_gfn = gpte_to_gfn(pte);
-		pte_gpa = gfn_to_gpa(table_gfn);
-		pte_gpa += index * sizeof(pt_element_t);
-		walker->table_gfn[walker->level - 1] = table_gfn;
-		walker->pte_gpa[walker->level - 1] = pte_gpa;
-		pgprintk("%s: table_gfn[%d] %lx\n", __FUNCTION__,
-			 walker->level - 1, table_gfn);
-
-		kvm_read_guest(vcpu->kvm, pte_gpa, &pte, sizeof(pte));
-
-		if (!is_present_pte(pte))
-			goto not_present;
-
-		if (write_fault && !is_writeble_pte(pte))
-			if (user_fault || is_write_protection(vcpu))
-				goto access_error;
-
-		if (user_fault && !(pte & PT_USER_MASK))
-			goto access_error;
-
-#if PTTYPE == 64
-		if (fetch_fault && is_nx(vcpu) && (pte & PT64_NX_MASK))
-			goto access_error;
-#endif
-
-		if (!(pte & PT_ACCESSED_MASK)) {
-			mark_page_dirty(vcpu->kvm, table_gfn);
-			if (FNAME(cmpxchg_gpte)(vcpu->kvm, table_gfn,
-			    index, pte, pte|PT_ACCESSED_MASK))
-				goto walk;
-			pte |= PT_ACCESSED_MASK;
-		}
-
-		pte_access = pt_access & FNAME(gpte_access)(vcpu, pte);
-
-		walker->ptes[walker->level - 1] = pte;
-
-		if (walker->level == PT_PAGE_TABLE_LEVEL) {
-			walker->gfn = gpte_to_gfn(pte);
-			break;
-		}
-
-		if (walker->level == PT_DIRECTORY_LEVEL
-		    && (pte & PT_PAGE_SIZE_MASK)
-		    && (PTTYPE == 64 || is_pse(vcpu))) {
-			walker->gfn = gpte_to_gfn_pde(pte);
-			walker->gfn += PT_INDEX(addr, PT_PAGE_TABLE_LEVEL);
-			if (PTTYPE == 32 && is_cpuid_PSE36())
-				walker->gfn += pse36_gfn_delta(pte);
-			break;
-		}
-
-		pt_access = pte_access;
-		--walker->level;
-	}
-
-	if (write_fault && !is_dirty_pte(pte)) {
-		bool ret;
-
-		mark_page_dirty(vcpu->kvm, table_gfn);
-		ret = FNAME(cmpxchg_gpte)(vcpu->kvm, table_gfn, index, pte,
-			    pte|PT_DIRTY_MASK);
-		if (ret)
-			goto walk;
-		pte |= PT_DIRTY_MASK;
-		kvm_mmu_pte_write(vcpu, pte_gpa, (u8 *)&pte, sizeof(pte));
-		walker->ptes[walker->level - 1] = pte;
-	}
-
-	walker->pt_access = pt_access;
-	walker->pte_access = pte_access;
-	pgprintk("%s: pte %llx pte_access %x pt_access %x\n",
-		 __FUNCTION__, (u64)pte, pt_access, pte_access);
-	return 1;
-
-not_present:
-	walker->error_code = 0;
-	goto err;
-
-access_error:
-	walker->error_code = PFERR_PRESENT_MASK;
-
-err:
-	if (write_fault)
-		walker->error_code |= PFERR_WRITE_MASK;
-	if (user_fault)
-		walker->error_code |= PFERR_USER_MASK;
-	if (fetch_fault)
-		walker->error_code |= PFERR_FETCH_MASK;
-	return 0;
-}
-
-static void FNAME(update_pte)(struct kvm_vcpu *vcpu, struct kvm_mmu_page *page,
-			      u64 *spte, const void *pte, int bytes,
-			      int offset_in_pte)
-{
-	pt_element_t gpte;
-	unsigned pte_access;
-
-	gpte = *(const pt_element_t *)pte;
-	if (~gpte & (PT_PRESENT_MASK | PT_ACCESSED_MASK)) {
-		if (!offset_in_pte && !is_present_pte(gpte))
-			set_shadow_pte(spte, shadow_notrap_nonpresent_pte);
-		return;
-	}
-	if (bytes < sizeof(pt_element_t))
-		return;
-	pgprintk("%s: gpte %llx spte %p\n", __FUNCTION__, (u64)gpte, spte);
-	pte_access = page->role.access & FNAME(gpte_access)(vcpu, gpte);
-	mmu_set_spte(vcpu, spte, page->role.access, pte_access, 0, 0,
-		     gpte & PT_DIRTY_MASK, NULL, gpte_to_gfn(gpte));
-}
-
-/*
- * Fetch a shadow pte for a specific level in the paging hierarchy.
- */
-static u64 *FNAME(fetch)(struct kvm_vcpu *vcpu, gva_t addr,
-			 struct guest_walker *walker,
-			 int user_fault, int write_fault, int *ptwrite)
-{
-	hpa_t shadow_addr;
-	int level;
-	u64 *shadow_ent;
-	unsigned access = walker->pt_access;
-
-	if (!is_present_pte(walker->ptes[walker->level - 1]))
-		return NULL;
-
-	shadow_addr = vcpu->arch.mmu.root_hpa;
-	level = vcpu->arch.mmu.shadow_root_level;
-	if (level == PT32E_ROOT_LEVEL) {
-		shadow_addr = vcpu->arch.mmu.pae_root[(addr >> 30) & 3];
-		shadow_addr &= PT64_BASE_ADDR_MASK;
-		--level;
-	}
-
-	for (; ; level--) {
-		u32 index = SHADOW_PT_INDEX(addr, level);
-		struct kvm_mmu_page *shadow_page;
-		u64 shadow_pte;
-		int metaphysical;
-		gfn_t table_gfn;
-		bool new_page = 0;
-
-		shadow_ent = ((u64 *)__va(shadow_addr)) + index;
-		if (is_shadow_present_pte(*shadow_ent)) {
-			if (level == PT_PAGE_TABLE_LEVEL)
-				break;
-			shadow_addr = *shadow_ent & PT64_BASE_ADDR_MASK;
-			continue;
-		}
-
-		if (level == PT_PAGE_TABLE_LEVEL)
-			break;
-
-		if (level - 1 == PT_PAGE_TABLE_LEVEL
-		    && walker->level == PT_DIRECTORY_LEVEL) {
-			metaphysical = 1;
-			if (!is_dirty_pte(walker->ptes[level - 1]))
-				access &= ~ACC_WRITE_MASK;
-			table_gfn = gpte_to_gfn(walker->ptes[level - 1]);
-		} else {
-			metaphysical = 0;
-			table_gfn = walker->table_gfn[level - 2];
-		}
-		shadow_page = kvm_mmu_get_page(vcpu, table_gfn, addr, level-1,
-					       metaphysical, access,
-					       shadow_ent, &new_page);
-		if (new_page && !metaphysical) {
-			pt_element_t curr_pte;
-			kvm_read_guest(vcpu->kvm, walker->pte_gpa[level - 2],
-				       &curr_pte, sizeof(curr_pte));
-			if (curr_pte != walker->ptes[level - 2])
-				return NULL;
-		}
-		shadow_addr = __pa(shadow_page->spt);
-		shadow_pte = shadow_addr | PT_PRESENT_MASK | PT_ACCESSED_MASK
-			| PT_WRITABLE_MASK | PT_USER_MASK;
-		*shadow_ent = shadow_pte;
-	}
-
-	mmu_set_spte(vcpu, shadow_ent, access, walker->pte_access & access,
-		     user_fault, write_fault,
-		     walker->ptes[walker->level-1] & PT_DIRTY_MASK,
-		     ptwrite, walker->gfn);
-
-	return shadow_ent;
-}
-
-/*
- * Page fault handler.  There are several causes for a page fault:
- *   - there is no shadow pte for the guest pte
- *   - write access through a shadow pte marked read only so that we can set
- *     the dirty bit
- *   - write access to a shadow pte marked read only so we can update the page
- *     dirty bitmap, when userspace requests it
- *   - mmio access; in this case we will never install a present shadow pte
- *   - normal guest page fault due to the guest pte marked not present, not
- *     writable, or not executable
- *
- *  Returns: 1 if we need to emulate the instruction, 0 otherwise, or
- *           a negative value on error.
- */
-static int FNAME(page_fault)(struct kvm_vcpu *vcpu, gva_t addr,
-			       u32 error_code)
-{
-	int write_fault = error_code & PFERR_WRITE_MASK;
-	int user_fault = error_code & PFERR_USER_MASK;
-	int fetch_fault = error_code & PFERR_FETCH_MASK;
-	struct guest_walker walker;
-	u64 *shadow_pte;
-	int write_pt = 0;
-	int r;
-
-	pgprintk("%s: addr %lx err %x\n", __FUNCTION__, addr, error_code);
-	kvm_mmu_audit(vcpu, "pre page fault");
-
-	r = mmu_topup_memory_caches(vcpu);
-	if (r)
-		return r;
-
-	/*
-	 * Look up the shadow pte for the faulting address.
-	 */
-	r = FNAME(walk_addr)(&walker, vcpu, addr, write_fault, user_fault,
-			     fetch_fault);
-
-	/*
-	 * The page is not mapped by the guest.  Let the guest handle it.
-	 */
-	if (!r) {
-		pgprintk("%s: guest page fault\n", __FUNCTION__);
-		inject_page_fault(vcpu, addr, walker.error_code);
-		vcpu->arch.last_pt_write_count = 0; /* reset fork detector */
-		return 0;
-	}
-
-	shadow_pte = FNAME(fetch)(vcpu, addr, &walker, user_fault, write_fault,
-				  &write_pt);
-	pgprintk("%s: shadow pte %p %llx ptwrite %d\n", __FUNCTION__,
-		 shadow_pte, *shadow_pte, write_pt);
-
-	if (!write_pt)
-		vcpu->arch.last_pt_write_count = 0; /* reset fork detector */
-
-	/*
-	 * mmio: emulate if accessible, otherwise its a guest fault.
-	 */
-	if (shadow_pte && is_io_pte(*shadow_pte))
-		return 1;
-
-	++vcpu->stat.pf_fixed;
-	kvm_mmu_audit(vcpu, "post page fault (fixed)");
-
-	return write_pt;
-}
-
-static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr)
-{
-	struct guest_walker walker;
-	gpa_t gpa = UNMAPPED_GVA;
-	int r;
-
-	r = FNAME(walk_addr)(&walker, vcpu, vaddr, 0, 0, 0);
-
-	if (r) {
-		gpa = gfn_to_gpa(walker.gfn);
-		gpa |= vaddr & ~PAGE_MASK;
-	}
-
-	return gpa;
-}
-
-static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu,
-				 struct kvm_mmu_page *sp)
-{
-	int i, offset = 0;
-	pt_element_t *gpt;
-	struct page *page;
-
-	if (sp->role.metaphysical
-	    || (PTTYPE == 32 && sp->role.level > PT_PAGE_TABLE_LEVEL)) {
-		nonpaging_prefetch_page(vcpu, sp);
-		return;
-	}
-
-	if (PTTYPE == 32)
-		offset = sp->role.quadrant << PT64_LEVEL_BITS;
-	page = gfn_to_page(vcpu->kvm, sp->gfn);
-	gpt = kmap_atomic(page, KM_USER0);
-	for (i = 0; i < PT64_ENT_PER_PAGE; ++i)
-		if (is_present_pte(gpt[offset + i]))
-			sp->spt[i] = shadow_trap_nonpresent_pte;
-		else
-			sp->spt[i] = shadow_notrap_nonpresent_pte;
-	kunmap_atomic(gpt, KM_USER0);
-	kvm_release_page_clean(page);
-}
-
-#undef pt_element_t
-#undef guest_walker
-#undef FNAME
-#undef PT_BASE_ADDR_MASK
-#undef PT_INDEX
-#undef SHADOW_PT_INDEX
-#undef PT_LEVEL_MASK
-#undef PT_DIR_BASE_ADDR_MASK
-#undef PT_LEVEL_BITS
-#undef PT_MAX_FULL_LEVELS
-#undef gpte_to_gfn
-#undef gpte_to_gfn_pde
-#undef CMPXCHG