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kvm/page_track: call notifiers with kvm_page_track_notifier_node

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The user of page_track might needs extra information, so pass
the kvm_page_track_notifier_node to callbacks.

Signed-off-by: Jike Song <jike.song@intel.com>
Reviewed-by: Xiao Guangrong <guangrong.xiao@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jike Song 2016-10-25 15:50:42 +08:00 committed by Paolo Bonzini
parent ae7cd87372
commit d126363d8f
3 changed files with 11 additions and 6 deletions
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7
arch/x86/include/asm/kvm_page_track.h
View File

@ -29,17 +29,20 @@ struct kvm_page_track_notifier_node {
* @gpa: the physical address written by guest.
* @new: the data was written to the address.
* @bytes: the written length.
* @node: this node
*/
void (*track_write)(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
int bytes);
int bytes, struct kvm_page_track_notifier_node *node);
/*
* It is called when memory slot is being moved or removed
* users can drop write-protection for the pages in that memory slot
*
* @kvm: the kvm where memory slot being moved or removed
* @slot: the memory slot being moved or removed
* @node: this node
*/
void (*track_flush_slot)(struct kvm *kvm, struct kvm_memory_slot *slot);
void (*track_flush_slot)(struct kvm *kvm, struct kvm_memory_slot *slot,
struct kvm_page_track_notifier_node *node);
};
void kvm_page_track_init(struct kvm *kvm);

6
arch/x86/kvm/mmu.c
View File

@ -4405,7 +4405,8 @@ static u64 *get_written_sptes(struct kvm_mmu_page *sp, gpa_t gpa, int *nspte)
}
static void kvm_mmu_pte_write(struct kvm_vcpu *vcpu, gpa_t gpa,
const u8 *new, int bytes)
const u8 *new, int bytes,
struct kvm_page_track_notifier_node *node)
{
gfn_t gfn = gpa >> PAGE_SHIFT;
struct kvm_mmu_page *sp;
@ -4618,7 +4619,8 @@ void kvm_mmu_setup(struct kvm_vcpu *vcpu)
}
static void kvm_mmu_invalidate_zap_pages_in_memslot(struct kvm *kvm,
struct kvm_memory_slot *slot)
struct kvm_memory_slot *slot,
struct kvm_page_track_notifier_node *node)
{
kvm_mmu_invalidate_zap_all_pages(kvm);
}

4
arch/x86/kvm/page_track.c
View File

@ -222,7 +222,7 @@ void kvm_page_track_write(struct kvm_vcpu *vcpu, gpa_t gpa, const u8 *new,
idx = srcu_read_lock(&head->track_srcu);
hlist_for_each_entry_rcu(n, &head->track_notifier_list, node)
if (n->track_write)
n->track_write(vcpu, gpa, new, bytes);
n->track_write(vcpu, gpa, new, bytes, n);
srcu_read_unlock(&head->track_srcu, idx);
}
@ -247,6 +247,6 @@ void kvm_page_track_flush_slot(struct kvm *kvm, struct kvm_memory_slot *slot)
idx = srcu_read_lock(&head->track_srcu);
hlist_for_each_entry_rcu(n, &head->track_notifier_list, node)
if (n->track_flush_slot)
n->track_flush_slot(kvm, slot);
n->track_flush_slot(kvm, slot, n);
srcu_read_unlock(&head->track_srcu, idx);
}