Currently we do not support Hyper-V hypercall continuation
so reject it.
Signed-off-by: Andrey Smetanin <asmeta...@virtuozzo.com>
Reviewed-by: Roman Kagan <rka...@virtuozzo.com>
CC: Gleb Natapov <g...@kernel.org>
CC: Paolo Bonzini <pbonz...@redhat.com>
CC: Joerg Roedel <j...@8bytes.org>
CC: "K. Y. Srinivasan" <k...@microsoft.com>
CC: Haiyang Zhang <haiya...@microsoft.com>
CC: Roman Kagan <rka...@virtuozzo.com>
CC: Denis V. Lunev <d...@openvz.org>
CC: qemu-devel@nongnu.org
---
arch/x86/kvm/hyperv.c | 7 +++++++
1 file changed, 7 insertions(+)
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 0e7c90f..e1daa8b 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -1083,6 +1083,12 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
trace_kvm_hv_hypercall(code, fast, rep_cnt, rep_idx, ingpa, outgpa);
+ /* Hypercall continuation is not supported yet */
+ if (rep_cnt || rep_idx) {
+ res = HV_STATUS_INVALID_HYPERCALL_CODE;
+ goto set_result;
+ }
+
switch (code) {
case HV_X64_HCALL_NOTIFY_LONG_SPIN_WAIT:
kvm_vcpu_on_spin(vcpu);
@@ -1092,6 +1098,7 @@ int kvm_hv_hypercall(struct kvm_vcpu *vcpu)
break;
}
+set_result:
ret = res | (((u64)rep_done & 0xfff) << 32);
if (longmode) {
kvm_register_write(vcpu, VCPU_REGS_RAX, ret);
--
2.4.3
