mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2025-01-03 12:24:45 +08:00
b6e16ae5d9
Stop setting dirty bits for MMU pages when dirty logging is disabled for a memslot, as PML is now completely disabled when there are no memslots with dirty logging enabled. This means that spurious PML entries will be created for memslots with dirty logging disabled if at least one other memslot has dirty logging enabled. However, spurious PML entries are already possible since dirty bits are set only when a dirty logging is turned off, i.e. memslots that are never dirty logged will have dirty bits cleared. In the end, it's faster overall to eat a few spurious PML entries in the window where dirty logging is being disabled across all memslots. Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20210213005015.1651772-13-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
74 lines
2.4 KiB
C
74 lines
2.4 KiB
C
// SPDX-License-Identifier: GPL-2.0
|
|
|
|
#ifndef __KVM_X86_MMU_TDP_MMU_H
|
|
#define __KVM_X86_MMU_TDP_MMU_H
|
|
|
|
#include <linux/kvm_host.h>
|
|
|
|
hpa_t kvm_tdp_mmu_get_vcpu_root_hpa(struct kvm_vcpu *vcpu);
|
|
void kvm_tdp_mmu_free_root(struct kvm *kvm, struct kvm_mmu_page *root);
|
|
|
|
bool kvm_tdp_mmu_zap_gfn_range(struct kvm *kvm, gfn_t start, gfn_t end);
|
|
void kvm_tdp_mmu_zap_all(struct kvm *kvm);
|
|
|
|
int kvm_tdp_mmu_map(struct kvm_vcpu *vcpu, gpa_t gpa, u32 error_code,
|
|
int map_writable, int max_level, kvm_pfn_t pfn,
|
|
bool prefault);
|
|
|
|
int kvm_tdp_mmu_zap_hva_range(struct kvm *kvm, unsigned long start,
|
|
unsigned long end);
|
|
|
|
int kvm_tdp_mmu_age_hva_range(struct kvm *kvm, unsigned long start,
|
|
unsigned long end);
|
|
int kvm_tdp_mmu_test_age_hva(struct kvm *kvm, unsigned long hva);
|
|
|
|
int kvm_tdp_mmu_set_spte_hva(struct kvm *kvm, unsigned long address,
|
|
pte_t *host_ptep);
|
|
|
|
bool kvm_tdp_mmu_wrprot_slot(struct kvm *kvm, struct kvm_memory_slot *slot,
|
|
int min_level);
|
|
bool kvm_tdp_mmu_clear_dirty_slot(struct kvm *kvm,
|
|
struct kvm_memory_slot *slot);
|
|
void kvm_tdp_mmu_clear_dirty_pt_masked(struct kvm *kvm,
|
|
struct kvm_memory_slot *slot,
|
|
gfn_t gfn, unsigned long mask,
|
|
bool wrprot);
|
|
void kvm_tdp_mmu_zap_collapsible_sptes(struct kvm *kvm,
|
|
struct kvm_memory_slot *slot);
|
|
|
|
bool kvm_tdp_mmu_write_protect_gfn(struct kvm *kvm,
|
|
struct kvm_memory_slot *slot, gfn_t gfn);
|
|
|
|
int kvm_tdp_mmu_get_walk(struct kvm_vcpu *vcpu, u64 addr, u64 *sptes,
|
|
int *root_level);
|
|
|
|
#ifdef CONFIG_X86_64
|
|
void kvm_mmu_init_tdp_mmu(struct kvm *kvm);
|
|
void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm);
|
|
static inline bool is_tdp_mmu_enabled(struct kvm *kvm) { return kvm->arch.tdp_mmu_enabled; }
|
|
static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return sp->tdp_mmu_page; }
|
|
#else
|
|
static inline void kvm_mmu_init_tdp_mmu(struct kvm *kvm) {}
|
|
static inline void kvm_mmu_uninit_tdp_mmu(struct kvm *kvm) {}
|
|
static inline bool is_tdp_mmu_enabled(struct kvm *kvm) { return false; }
|
|
static inline bool is_tdp_mmu_page(struct kvm_mmu_page *sp) { return false; }
|
|
#endif
|
|
|
|
static inline bool is_tdp_mmu_root(struct kvm *kvm, hpa_t hpa)
|
|
{
|
|
struct kvm_mmu_page *sp;
|
|
|
|
if (!is_tdp_mmu_enabled(kvm))
|
|
return false;
|
|
if (WARN_ON(!VALID_PAGE(hpa)))
|
|
return false;
|
|
|
|
sp = to_shadow_page(hpa);
|
|
if (WARN_ON(!sp))
|
|
return false;
|
|
|
|
return is_tdp_mmu_page(sp) && sp->root_count;
|
|
}
|
|
|
|
#endif /* __KVM_X86_MMU_TDP_MMU_H */
|