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Subject[PATCH v6 02/14] KVM: Cache as_id in kvm_memory_slot
Date
Cache the address space ID just like the slot ID.  It will be used in
order to fill in the dirty ring entries.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
include/linux/kvm_host.h | 1 +
virt/kvm/kvm_main.c | 2 ++
2 files changed, 3 insertions(+)

diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index bcb9b2ac0791..afa0e9034881 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -346,6 +346,7 @@ struct kvm_memory_slot {
unsigned long userspace_addr;
u32 flags;
short id;
+ u8 as_id;
};

static inline unsigned long kvm_dirty_bitmap_bytes(struct kvm_memory_slot *memslot)
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c
index 70f03ce0e5c1..e6484dabfc59 100644
--- a/virt/kvm/kvm_main.c
+++ b/virt/kvm/kvm_main.c
@@ -1036,6 +1036,8 @@ int __kvm_set_memory_region(struct kvm *kvm,

new = old = *slot;

+ BUILD_BUG_ON(U8_MAX < KVM_ADDRESS_SPACE_NUM);
+ new.as_id = as_id;
new.id = id;
new.base_gfn = base_gfn;
new.npages = npages;
--
2.24.1
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