diff options
| author | Marcelo Tosatti <mtosatti@redhat.com> | 2009-12-23 14:35:21 -0200 |
|---|---|---|
| committer | Marcelo Tosatti <mtosatti@redhat.com> | 2010-03-01 12:35:44 -0300 |
| commit | bc6678a33d9b952981a8e44a4f876c3ad64ca4d8 (patch) | |
| tree | e26027179eb0d76f234509145a395dd6e5910074 /include | |
| parent | 3ad26d8139a82b0510b1e0435ee82ae461d33401 (diff) | |
KVM: introduce kvm->srcu and convert kvm_set_memory_region to SRCU update
Use two steps for memslot deletion: mark the slot invalid (which stops
instantiation of new shadow pages for that slot, but allows destruction),
then instantiate the new empty slot.
Also simplifies kvm_handle_hva locking.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kvm.h | 2 | ||||
| -rw-r--r-- | include/linux/kvm_host.h | 7 |
2 files changed, 3 insertions, 6 deletions
diff --git a/include/linux/kvm.h b/include/linux/kvm.h index a24de0b1858..f2feef68ffd 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -103,7 +103,7 @@ struct kvm_userspace_memory_region { /* for kvm_memory_region::flags */ #define KVM_MEM_LOG_DIRTY_PAGES 1UL - +#define KVM_MEMSLOT_INVALID (1UL << 1) /* for KVM_IRQ_LINE */ struct kvm_irq_level { diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h index 9af240387fe..93bd30701ca 100644 --- a/include/linux/kvm_host.h +++ b/include/linux/kvm_host.h @@ -162,6 +162,7 @@ struct kvm { struct rw_semaphore slots_lock; struct mm_struct *mm; /* userspace tied to this vm */ struct kvm_memslots *memslots; + struct srcu_struct srcu; #ifdef CONFIG_KVM_APIC_ARCHITECTURE u32 bsp_vcpu_id; struct kvm_vcpu *bsp_vcpu; @@ -275,6 +276,7 @@ void kvm_set_page_accessed(struct page *page); pfn_t gfn_to_pfn(struct kvm *kvm, gfn_t gfn); pfn_t gfn_to_pfn_memslot(struct kvm *kvm, struct kvm_memory_slot *slot, gfn_t gfn); +int memslot_id(struct kvm *kvm, gfn_t gfn); void kvm_release_pfn_dirty(pfn_t); void kvm_release_pfn_clean(pfn_t pfn); void kvm_set_pfn_dirty(pfn_t pfn); @@ -490,11 +492,6 @@ static inline void kvm_guest_exit(void) current->flags &= ~PF_VCPU; } -static inline int memslot_id(struct kvm *kvm, struct kvm_memory_slot *slot) -{ - return slot - kvm->memslots->memslots; -} - static inline gpa_t gfn_to_gpa(gfn_t gfn) { return (gpa_t)gfn << PAGE_SHIFT; |