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KVM: MMU: Rename PT64_ROOT_LEVEL to PT64_ROOT_4LEVEL.
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Now we have 4 level page table and 5 level page table in 64 bits
long mode, let's rename the PT64_ROOT_LEVEL to PT64_ROOT_4LEVEL,
then we can use PT64_ROOT_5LEVEL for 5 level page table, it's
helpful to make the code more clear.

Also PT64_ROOT_MAX_LEVEL is defined as 4, so that we can just
redefine it to 5 whenever a replacement is needed for 5 level
paging.

Signed-off-by: Yu Zhang <yu.c.zhang@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Yu Zhang authored and Paolo Bonzini committed Aug 24, 2017
1 parent d1cd3ce commit 2a7266a
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Showing 5 changed files with 25 additions and 23 deletions.
4 changes: 3 additions & 1 deletion arch/x86/include/asm/kvm_host.h
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Original file line number Diff line number Diff line change
Expand Up @@ -315,8 +315,10 @@ struct kvm_pio_request {
int size;
};

#define PT64_ROOT_MAX_LEVEL 4

struct rsvd_bits_validate {
u64 rsvd_bits_mask[2][4];
u64 rsvd_bits_mask[2][PT64_ROOT_MAX_LEVEL];
u64 bad_mt_xwr;
};

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36 changes: 18 additions & 18 deletions arch/x86/kvm/mmu.c
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Original file line number Diff line number Diff line change
Expand Up @@ -2167,8 +2167,8 @@ static bool kvm_sync_pages(struct kvm_vcpu *vcpu, gfn_t gfn,
}

struct mmu_page_path {
struct kvm_mmu_page *parent[PT64_ROOT_LEVEL];
unsigned int idx[PT64_ROOT_LEVEL];
struct kvm_mmu_page *parent[PT64_ROOT_MAX_LEVEL];
unsigned int idx[PT64_ROOT_MAX_LEVEL];
};

#define for_each_sp(pvec, sp, parents, i) \
Expand Down Expand Up @@ -2383,8 +2383,8 @@ static void shadow_walk_init(struct kvm_shadow_walk_iterator *iterator,
iterator->shadow_addr = vcpu->arch.mmu.root_hpa;
iterator->level = vcpu->arch.mmu.shadow_root_level;

if (iterator->level == PT64_ROOT_LEVEL &&
vcpu->arch.mmu.root_level < PT64_ROOT_LEVEL &&
if (iterator->level == PT64_ROOT_4LEVEL &&
vcpu->arch.mmu.root_level < PT64_ROOT_4LEVEL &&
!vcpu->arch.mmu.direct_map)
--iterator->level;

Expand Down Expand Up @@ -3322,8 +3322,8 @@ static void mmu_free_roots(struct kvm_vcpu *vcpu)
if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
return;

if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_LEVEL &&
(vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL ||
if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_4LEVEL &&
(vcpu->arch.mmu.root_level == PT64_ROOT_4LEVEL ||
vcpu->arch.mmu.direct_map)) {
hpa_t root = vcpu->arch.mmu.root_hpa;

Expand Down Expand Up @@ -3375,13 +3375,13 @@ static int mmu_alloc_direct_roots(struct kvm_vcpu *vcpu)
struct kvm_mmu_page *sp;
unsigned i;

if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_LEVEL) {
if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_4LEVEL) {
spin_lock(&vcpu->kvm->mmu_lock);
if(make_mmu_pages_available(vcpu) < 0) {
spin_unlock(&vcpu->kvm->mmu_lock);
return 1;
}
sp = kvm_mmu_get_page(vcpu, 0, 0, PT64_ROOT_LEVEL, 1, ACC_ALL);
sp = kvm_mmu_get_page(vcpu, 0, 0, PT64_ROOT_4LEVEL, 1, ACC_ALL);
++sp->root_count;
spin_unlock(&vcpu->kvm->mmu_lock);
vcpu->arch.mmu.root_hpa = __pa(sp->spt);
Expand Down Expand Up @@ -3425,7 +3425,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
* Do we shadow a long mode page table? If so we need to
* write-protect the guests page table root.
*/
if (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL) {
if (vcpu->arch.mmu.root_level == PT64_ROOT_4LEVEL) {
hpa_t root = vcpu->arch.mmu.root_hpa;

MMU_WARN_ON(VALID_PAGE(root));
Expand All @@ -3435,7 +3435,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
spin_unlock(&vcpu->kvm->mmu_lock);
return 1;
}
sp = kvm_mmu_get_page(vcpu, root_gfn, 0, PT64_ROOT_LEVEL,
sp = kvm_mmu_get_page(vcpu, root_gfn, 0, PT64_ROOT_4LEVEL,
0, ACC_ALL);
root = __pa(sp->spt);
++sp->root_count;
Expand All @@ -3450,7 +3450,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
* the shadow page table may be a PAE or a long mode page table.
*/
pm_mask = PT_PRESENT_MASK;
if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_LEVEL)
if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_4LEVEL)
pm_mask |= PT_ACCESSED_MASK | PT_WRITABLE_MASK | PT_USER_MASK;

for (i = 0; i < 4; ++i) {
Expand Down Expand Up @@ -3486,7 +3486,7 @@ static int mmu_alloc_shadow_roots(struct kvm_vcpu *vcpu)
* If we shadow a 32 bit page table with a long mode page
* table we enter this path.
*/
if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_LEVEL) {
if (vcpu->arch.mmu.shadow_root_level == PT64_ROOT_4LEVEL) {
if (vcpu->arch.mmu.lm_root == NULL) {
/*
* The additional page necessary for this is only
Expand Down Expand Up @@ -3531,7 +3531,7 @@ static void mmu_sync_roots(struct kvm_vcpu *vcpu)

vcpu_clear_mmio_info(vcpu, MMIO_GVA_ANY);
kvm_mmu_audit(vcpu, AUDIT_PRE_SYNC);
if (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL) {
if (vcpu->arch.mmu.root_level == PT64_ROOT_4LEVEL) {
hpa_t root = vcpu->arch.mmu.root_hpa;
sp = page_header(root);
mmu_sync_children(vcpu, sp);
Expand Down Expand Up @@ -3614,7 +3614,7 @@ static bool
walk_shadow_page_get_mmio_spte(struct kvm_vcpu *vcpu, u64 addr, u64 *sptep)
{
struct kvm_shadow_walk_iterator iterator;
u64 sptes[PT64_ROOT_LEVEL], spte = 0ull;
u64 sptes[PT64_ROOT_MAX_LEVEL], spte = 0ull;
int root, leaf;
bool reserved = false;

Expand Down Expand Up @@ -4057,7 +4057,7 @@ __reset_rsvds_bits_mask(struct kvm_vcpu *vcpu,
rsvd_check->rsvd_bits_mask[1][0] =
rsvd_check->rsvd_bits_mask[0][0];
break;
case PT64_ROOT_LEVEL:
case PT64_ROOT_4LEVEL:
rsvd_check->rsvd_bits_mask[0][3] = exb_bit_rsvd |
nonleaf_bit8_rsvd | rsvd_bits(7, 7) |
rsvd_bits(maxphyaddr, 51);
Expand Down Expand Up @@ -4367,7 +4367,7 @@ static void paging64_init_context_common(struct kvm_vcpu *vcpu,
static void paging64_init_context(struct kvm_vcpu *vcpu,
struct kvm_mmu *context)
{
paging64_init_context_common(vcpu, context, PT64_ROOT_LEVEL);
paging64_init_context_common(vcpu, context, PT64_ROOT_4LEVEL);
}

static void paging32_init_context(struct kvm_vcpu *vcpu,
Expand Down Expand Up @@ -4422,7 +4422,7 @@ static void init_kvm_tdp_mmu(struct kvm_vcpu *vcpu)
context->root_level = 0;
} else if (is_long_mode(vcpu)) {
context->nx = is_nx(vcpu);
context->root_level = PT64_ROOT_LEVEL;
context->root_level = PT64_ROOT_4LEVEL;
reset_rsvds_bits_mask(vcpu, context);
context->gva_to_gpa = paging64_gva_to_gpa;
} else if (is_pae(vcpu)) {
Expand Down Expand Up @@ -4533,7 +4533,7 @@ static void init_kvm_nested_mmu(struct kvm_vcpu *vcpu)
g_context->gva_to_gpa = nonpaging_gva_to_gpa_nested;
} else if (is_long_mode(vcpu)) {
g_context->nx = is_nx(vcpu);
g_context->root_level = PT64_ROOT_LEVEL;
g_context->root_level = PT64_ROOT_4LEVEL;
reset_rsvds_bits_mask(vcpu, g_context);
g_context->gva_to_gpa = paging64_gva_to_gpa_nested;
} else if (is_pae(vcpu)) {
Expand Down
2 changes: 1 addition & 1 deletion arch/x86/kvm/mmu.h
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Original file line number Diff line number Diff line change
Expand Up @@ -37,7 +37,7 @@
#define PT32_DIR_PSE36_MASK \
(((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT)

#define PT64_ROOT_LEVEL 4
#define PT64_ROOT_4LEVEL 4
#define PT32_ROOT_LEVEL 2
#define PT32E_ROOT_LEVEL 3

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4 changes: 2 additions & 2 deletions arch/x86/kvm/mmu_audit.c
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Original file line number Diff line number Diff line change
Expand Up @@ -62,11 +62,11 @@ static void mmu_spte_walk(struct kvm_vcpu *vcpu, inspect_spte_fn fn)
if (!VALID_PAGE(vcpu->arch.mmu.root_hpa))
return;

if (vcpu->arch.mmu.root_level == PT64_ROOT_LEVEL) {
if (vcpu->arch.mmu.root_level == PT64_ROOT_4LEVEL) {
hpa_t root = vcpu->arch.mmu.root_hpa;

sp = page_header(root);
__mmu_spte_walk(vcpu, sp, fn, PT64_ROOT_LEVEL);
__mmu_spte_walk(vcpu, sp, fn, PT64_ROOT_4LEVEL);
return;
}

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2 changes: 1 addition & 1 deletion arch/x86/kvm/svm.c
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Original file line number Diff line number Diff line change
Expand Up @@ -584,7 +584,7 @@ static inline void invlpga(unsigned long addr, u32 asid)
static int get_npt_level(void)
{
#ifdef CONFIG_X86_64
return PT64_ROOT_LEVEL;
return PT64_ROOT_4LEVEL;
#else
return PT32E_ROOT_LEVEL;
#endif
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