There is no real distinction between glevels=3 and glevels=4; both have exactly the same format and the code is treated exactly the same way. Drop role.glevels and replace is with role.cr4_pae (which is meaningful). This simplifies the code a bit. As a side effect, it allows sharing shadow page tables between pae and longmode guest page tables at the same guest page. Signed-off-by: Avi Kivity <avi@xxxxxxxxxx> --- arch/x86/include/asm/kvm_host.h | 2 +- arch/x86/kvm/mmu.c | 12 ++++++------ arch/x86/kvm/mmutrace.h | 5 +++-- 3 files changed, 10 insertions(+), 9 deletions(-) diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h index 0c49c88..90530a6 100644 --- a/arch/x86/include/asm/kvm_host.h +++ b/arch/x86/include/asm/kvm_host.h @@ -171,8 +171,8 @@ struct kvm_pte_chain { union kvm_mmu_page_role { unsigned word; struct { - unsigned glevels:4; unsigned level:4; + unsigned cr4_pae:1; unsigned quadrant:2; unsigned pad_for_nice_hex_output:6; unsigned direct:1; diff --git a/arch/x86/kvm/mmu.c b/arch/x86/kvm/mmu.c index b44380b..edfef80 100644 --- a/arch/x86/kvm/mmu.c +++ b/arch/x86/kvm/mmu.c @@ -1205,7 +1205,7 @@ static int kvm_mmu_zap_page(struct kvm *kvm, struct kvm_mmu_page *sp); static int kvm_sync_page(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp) { - if (sp->role.glevels != vcpu->arch.mmu.root_level) { + if (sp->role.cr4_pae != !!is_pae(vcpu)) { kvm_mmu_zap_page(vcpu->kvm, sp); return 1; } @@ -1328,7 +1328,7 @@ static struct kvm_mmu_page *kvm_mmu_get_page(struct kvm_vcpu *vcpu, role.level = level; role.direct = direct; if (role.direct) - role.glevels = 0; + role.cr4_pae = 0; role.access = access; if (vcpu->arch.mmu.root_level <= PT32_ROOT_LEVEL) { quadrant = gaddr >> (PAGE_SHIFT + (PT64_PT_BITS * level)); @@ -2439,7 +2439,7 @@ static int init_kvm_softmmu(struct kvm_vcpu *vcpu) else r = paging32_init_context(vcpu); - vcpu->arch.mmu.base_role.glevels = vcpu->arch.mmu.root_level; + vcpu->arch.mmu.base_role.cr4_pae = !!is_pae(vcpu); return r; } @@ -2528,7 +2528,7 @@ static void mmu_pte_write_new_pte(struct kvm_vcpu *vcpu, } ++vcpu->kvm->stat.mmu_pte_updated; - if (sp->role.glevels == PT32_ROOT_LEVEL) + if (!sp->role.cr4_pae) paging32_update_pte(vcpu, sp, spte, new); else paging64_update_pte(vcpu, sp, spte, new); @@ -2677,7 +2677,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, hlist_for_each_entry_safe(sp, node, n, bucket, hash_link) { if (sp->gfn != gfn || sp->role.direct || sp->role.invalid) continue; - pte_size = sp->role.glevels == PT32_ROOT_LEVEL ? 4 : 8; + pte_size = sp->role.cr4_pae ? 8 : 4; misaligned = (offset ^ (offset + bytes - 1)) & ~(pte_size - 1); misaligned |= bytes < 4; if (misaligned || flooded) { @@ -2701,7 +2701,7 @@ void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa, page_offset = offset; level = sp->role.level; npte = 1; - if (sp->role.glevels == PT32_ROOT_LEVEL) { + if (!sp->role.cr4_pae) { page_offset <<= 1; /* 32->64 */ /* * A 32-bit pde maps 4MB while the shadow pdes map diff --git a/arch/x86/kvm/mmutrace.h b/arch/x86/kvm/mmutrace.h index 1fe956a..3851f1f 100644 --- a/arch/x86/kvm/mmutrace.h +++ b/arch/x86/kvm/mmutrace.h @@ -28,9 +28,10 @@ \ role.word = __entry->role; \ \ - trace_seq_printf(p, "sp gfn %llx %u/%u q%u%s %s%s %spge" \ + trace_seq_printf(p, "sp gfn %llx %u%s q%u%s %s%s %spge" \ " %snxe root %u %s%c", \ - __entry->gfn, role.level, role.glevels, \ + __entry->gfn, role.level, \ + role.cr4_pae ? " pae" : "", \ role.quadrant, \ role.direct ? " direct" : "", \ access_str[role.access], \ -- 1.7.0.4 -- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html