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KVM: MMU: make use of ->root_level in reset_rsvds_bits_mask 

The reset_rsvds_bits_mask() function can use the guest walker's root level
number instead of using a separate 'level' variable.

Signed-off-by: Davidlohr Bueso <dave@gnu.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Davidlohr Bueso 2012-03-05 16:53:06 +01:00 committed by Avi Kivity
parent 62079d8a43
commit 4d6931c380
1 changed files with 15 additions and 16 deletions
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31
arch/x86/kvm/mmu.c
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@ -3185,15 +3185,14 @@ static bool sync_mmio_spte(u64 *sptep, gfn_t gfn, unsigned access,
#undef PTTYPE
static void reset_rsvds_bits_mask(struct kvm_vcpu *vcpu,
struct kvm_mmu *context,
int level)
struct kvm_mmu *context)
{
int maxphyaddr = cpuid_maxphyaddr(vcpu);
u64 exb_bit_rsvd = 0;
if (!context->nx)
exb_bit_rsvd = rsvd_bits(63, 63);
switch (level) {
switch (context->root_level) {
case PT32_ROOT_LEVEL:
/* no rsvd bits for 2 level 4K page table entries */
context->rsvd_bits_mask[0][1] = 0;
@ -3251,8 +3250,9 @@ static int paging64_init_context_common(struct kvm_vcpu *vcpu,
int level)
{
context->nx = is_nx(vcpu);
context->root_level = level;
reset_rsvds_bits_mask(vcpu, context, level);
reset_rsvds_bits_mask(vcpu, context);
ASSERT(is_pae(vcpu));
context->new_cr3 = paging_new_cr3;
@ -3262,7 +3262,6 @@ static int paging64_init_context_common(struct kvm_vcpu *vcpu,
context->invlpg = paging64_invlpg;
context->update_pte = paging64_update_pte;
context->free = paging_free;
context->root_level = level;
context->shadow_root_level = level;
context->root_hpa = INVALID_PAGE;
context->direct_map = false;
@ -3279,8 +3278,9 @@ static int paging32_init_context(struct kvm_vcpu *vcpu,
struct kvm_mmu *context)
{
context->nx = false;
context->root_level = PT32_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, context, PT32_ROOT_LEVEL);
reset_rsvds_bits_mask(vcpu, context);
context->new_cr3 = paging_new_cr3;
context->page_fault = paging32_page_fault;
@ -3289,7 +3289,6 @@ static int paging32_init_context(struct kvm_vcpu *vcpu,
context->sync_page = paging32_sync_page;
context->invlpg = paging32_invlpg;
context->update_pte = paging32_update_pte;
context->root_level = PT32_ROOT_LEVEL;
context->shadow_root_level = PT32E_ROOT_LEVEL;
context->root_hpa = INVALID_PAGE;
context->direct_map = false;
@ -3327,19 +3326,19 @@ static int init_kvm_tdp_mmu(struct kvm_vcpu *vcpu)
context->root_level = 0;
} else if (is_long_mode(vcpu)) {
context->nx = is_nx(vcpu);
reset_rsvds_bits_mask(vcpu, context, PT64_ROOT_LEVEL);
context->gva_to_gpa = paging64_gva_to_gpa;
context->root_level = PT64_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, context);
context->gva_to_gpa = paging64_gva_to_gpa;
} else if (is_pae(vcpu)) {
context->nx = is_nx(vcpu);
reset_rsvds_bits_mask(vcpu, context, PT32E_ROOT_LEVEL);
context->gva_to_gpa = paging64_gva_to_gpa;
context->root_level = PT32E_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, context);
context->gva_to_gpa = paging64_gva_to_gpa;
} else {
context->nx = false;
reset_rsvds_bits_mask(vcpu, context, PT32_ROOT_LEVEL);
context->gva_to_gpa = paging32_gva_to_gpa;
context->root_level = PT32_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, context);
context->gva_to_gpa = paging32_gva_to_gpa;
}
return 0;
@ -3402,18 +3401,18 @@ static int 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);
reset_rsvds_bits_mask(vcpu, g_context, PT64_ROOT_LEVEL);
g_context->root_level = PT64_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, g_context);
g_context->gva_to_gpa = paging64_gva_to_gpa_nested;
} else if (is_pae(vcpu)) {
g_context->nx = is_nx(vcpu);
reset_rsvds_bits_mask(vcpu, g_context, PT32E_ROOT_LEVEL);
g_context->root_level = PT32E_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, g_context);
g_context->gva_to_gpa = paging64_gva_to_gpa_nested;
} else {
g_context->nx = false;
reset_rsvds_bits_mask(vcpu, g_context, PT32_ROOT_LEVEL);
g_context->root_level = PT32_ROOT_LEVEL;
reset_rsvds_bits_mask(vcpu, g_context);
g_context->gva_to_gpa = paging32_gva_to_gpa_nested;
}