diff options
| author | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-16 10:29:37 -0400 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-10-21 18:16:59 -0400 |
| commit | 5a9624affe7c7498fb395879d9bb613628e89e60 (patch) | |
| tree | d0a58007a0457c7c0df694900c251320483b7c15 /arch/x86/kvm/mmu/mmu_internal.h | |
| parent | cb3eedab453911ca177c1e2e44add0b7fe4a6f09 (diff) | |
KVM: mmu: extract spte.h and spte.c
The SPTE format will be common to both the shadow and the TDP MMU.
Extract code that implements the format to a separate module, as a
first step towards adding the TDP MMU and putting mmu.c on a diet.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/mmu/mmu_internal.h')
| -rw-r--r-- | arch/x86/kvm/mmu/mmu_internal.h | 31 |
1 files changed, 30 insertions, 1 deletions
diff --git a/arch/x86/kvm/mmu/mmu_internal.h b/arch/x86/kvm/mmu/mmu_internal.h index 3acf3b8eb469..fc72f199eaa6 100644 --- a/arch/x86/kvm/mmu/mmu_internal.h +++ b/arch/x86/kvm/mmu/mmu_internal.h @@ -3,9 +3,23 @@ #define __KVM_X86_MMU_INTERNAL_H #include <linux/types.h> - +#include <linux/kvm_host.h> #include <asm/kvm_host.h> +#undef MMU_DEBUG + +#ifdef MMU_DEBUG +extern bool dbg; + +#define pgprintk(x...) do { if (dbg) printk(x); } while (0) +#define rmap_printk(x...) do { if (dbg) printk(x); } while (0) +#define MMU_WARN_ON(x) WARN_ON(x) +#else +#define pgprintk(x...) do { } while (0) +#define rmap_printk(x...) do { } while (0) +#define MMU_WARN_ON(x) do { } while (0) +#endif + struct kvm_mmu_page { struct list_head link; struct hlist_node hash_link; @@ -55,6 +69,21 @@ static inline struct kvm_mmu_page *sptep_to_sp(u64 *sptep) return to_shadow_page(__pa(sptep)); } +static inline bool kvm_vcpu_ad_need_write_protect(struct kvm_vcpu *vcpu) +{ + /* + * When using the EPT page-modification log, the GPAs in the log + * would come from L2 rather than L1. Therefore, we need to rely + * on write protection to record dirty pages. This also bypasses + * PML, since writes now result in a vmexit. + */ + return vcpu->arch.mmu == &vcpu->arch.guest_mmu; +} + +bool is_nx_huge_page_enabled(void); +bool mmu_need_write_protect(struct kvm_vcpu *vcpu, gfn_t gfn, + bool can_unsync); + void kvm_mmu_gfn_disallow_lpage(struct kvm_memory_slot *slot, gfn_t gfn); void kvm_mmu_gfn_allow_lpage(struct kvm_memory_slot *slot, gfn_t gfn); bool kvm_mmu_slot_gfn_write_protect(struct kvm *kvm, |