forked from Minki/linux
fc78f51938
Some bits of cr4 can be owned by the guest on vmx, so when we read them, we copy them to the vcpu structure. In preparation for making the set of guest-owned bits dynamic, use helpers to access these bits so we don't need to know where the bit resides. No changes to svm since all bits are host-owned there. Signed-off-by: Avi Kivity <avi@redhat.com>
87 lines
2.0 KiB
C
87 lines
2.0 KiB
C
#ifndef __KVM_X86_MMU_H
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#define __KVM_X86_MMU_H
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#include <linux/kvm_host.h>
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#include "kvm_cache_regs.h"
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#define PT64_PT_BITS 9
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#define PT64_ENT_PER_PAGE (1 << PT64_PT_BITS)
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#define PT32_PT_BITS 10
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#define PT32_ENT_PER_PAGE (1 << PT32_PT_BITS)
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#define PT_WRITABLE_SHIFT 1
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#define PT_PRESENT_MASK (1ULL << 0)
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#define PT_WRITABLE_MASK (1ULL << PT_WRITABLE_SHIFT)
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#define PT_USER_MASK (1ULL << 2)
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#define PT_PWT_MASK (1ULL << 3)
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#define PT_PCD_MASK (1ULL << 4)
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#define PT_ACCESSED_SHIFT 5
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#define PT_ACCESSED_MASK (1ULL << PT_ACCESSED_SHIFT)
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#define PT_DIRTY_MASK (1ULL << 6)
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#define PT_PAGE_SIZE_MASK (1ULL << 7)
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#define PT_PAT_MASK (1ULL << 7)
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#define PT_GLOBAL_MASK (1ULL << 8)
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#define PT64_NX_SHIFT 63
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#define PT64_NX_MASK (1ULL << PT64_NX_SHIFT)
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#define PT_PAT_SHIFT 7
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#define PT_DIR_PAT_SHIFT 12
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#define PT_DIR_PAT_MASK (1ULL << PT_DIR_PAT_SHIFT)
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#define PT32_DIR_PSE36_SIZE 4
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#define PT32_DIR_PSE36_SHIFT 13
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#define PT32_DIR_PSE36_MASK \
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(((1ULL << PT32_DIR_PSE36_SIZE) - 1) << PT32_DIR_PSE36_SHIFT)
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#define PT64_ROOT_LEVEL 4
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#define PT32_ROOT_LEVEL 2
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#define PT32E_ROOT_LEVEL 3
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int kvm_mmu_get_spte_hierarchy(struct kvm_vcpu *vcpu, u64 addr, u64 sptes[4]);
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static inline void kvm_mmu_free_some_pages(struct kvm_vcpu *vcpu)
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{
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if (unlikely(vcpu->kvm->arch.n_free_mmu_pages < KVM_MIN_FREE_MMU_PAGES))
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__kvm_mmu_free_some_pages(vcpu);
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}
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static inline int kvm_mmu_reload(struct kvm_vcpu *vcpu)
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{
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if (likely(vcpu->arch.mmu.root_hpa != INVALID_PAGE))
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return 0;
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return kvm_mmu_load(vcpu);
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}
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static inline int is_long_mode(struct kvm_vcpu *vcpu)
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{
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#ifdef CONFIG_X86_64
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return vcpu->arch.shadow_efer & EFER_LMA;
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#else
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return 0;
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#endif
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}
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static inline int is_pae(struct kvm_vcpu *vcpu)
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{
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return kvm_read_cr4_bits(vcpu, X86_CR4_PAE);
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}
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static inline int is_pse(struct kvm_vcpu *vcpu)
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{
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return kvm_read_cr4_bits(vcpu, X86_CR4_PSE);
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}
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static inline int is_paging(struct kvm_vcpu *vcpu)
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{
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return vcpu->arch.cr0 & X86_CR0_PG;
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}
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static inline int is_present_gpte(unsigned long pte)
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{
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return pte & PT_PRESENT_MASK;
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}
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#endif
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