diff options
Diffstat (limited to 'arch/powerpc/kvm')
| -rw-r--r-- | arch/powerpc/kvm/book3s_hv.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/arch/powerpc/kvm/book3s_hv.c b/arch/powerpc/kvm/book3s_hv.c index 359c79cdf0cc..1182cfd79857 100644 --- a/arch/powerpc/kvm/book3s_hv.c +++ b/arch/powerpc/kvm/book3s_hv.c @@ -485,7 +485,13 @@ static unsigned long do_h_register_vpa(struct kvm_vcpu *vcpu, switch (subfunc) { case H_VPA_REG_VPA: /* register VPA */ - if (len < sizeof(struct lppaca)) + /* + * The size of our lppaca is 1kB because of the way we align + * it for the guest to avoid crossing a 4kB boundary. We only + * use 640 bytes of the structure though, so we should accept + * clients that set a size of 640. + */ + if (len < 640) break; vpap = &tvcpu->arch.vpa; err = 0; |