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| author |   Paolo Bonzini <pbonzini@redhat.com> | 2014-08-20 14:29:21 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-09-03 10:03:35 +0200 |
| commit | 00f034a12fdd81210d58116326d92780aac5c238 (patch) | |
| tree | 6e1eb1f40e9914fa801bf128f1eed19543f665c2 /virt | |
| parent | KVM: x86: use guest maxphyaddr to check MTRR values (diff) | |
| download | linux-dev-00f034a12fdd81210d58116326d92780aac5c238.tar.xz linux-dev-00f034a12fdd81210d58116326d92780aac5c238.zip | |
KVM: do not bias the generation number in kvm_current_mmio_generation
The next patch will give a meaning (a la seqcount) to the low bit of the
generation number. Ensure that it matches between kvm->memslots->generation
and kvm_current_mmio_generation().
Cc: stable@vger.kernel.org
Reviewed-by: David Matlack <dmatlack@google.com>
Reviewed-by: Xiao Guangrong <xiaoguangrong@linux.vnet.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'virt')
| -rw-r--r-- | virt/kvm/kvm_main.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/virt/kvm/kvm_main.c b/virt/kvm/kvm_main.c index 7176929a4cda..0bfdb673db26 100644 --- a/virt/kvm/kvm_main.c +++ b/virt/kvm/kvm_main.c @@ -477,6 +477,13 @@ static struct kvm *kvm_create_vm(unsigned long type) kvm->memslots = kzalloc(sizeof(struct kvm_memslots), GFP_KERNEL); if (!kvm->memslots) goto out_err_no_srcu; + + /* + * Init kvm generation close to the maximum to easily test the + * code of handling generation number wrap-around. + */ + kvm->memslots->generation = -150; + kvm_init_memslots_id(kvm); if (init_srcu_struct(&kvm->srcu)) goto out_err_no_srcu; |