diff options
| author | Andrey Smetanin <asmetanin@virtuozzo.com> | 2016-02-11 16:45:00 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-02-16 18:48:42 +0100 |
| commit | b2fdc2570a6c4b1fe950c11a2e9ce949f5190765 (patch) | |
| tree | ce1be19f9994c11a7a65e78b424485e27f445518 /arch/x86/kvm/hyperv.c | |
| parent | 0d9c055eaaf41bebb0e6b095fff447523121fad3 (diff) | |
| download | linux-0-day-b2fdc2570a6c4b1fe950c11a2e9ce949f5190765.tar.gz linux-0-day-b2fdc2570a6c4b1fe950c11a2e9ce949f5190765.tar.xz | |
kvm/x86: Reject Hyper-V hypercall continuation
Currently we do not support Hyper-V hypercall continuation
so reject it.
Signed-off-by: Andrey Smetanin <asmetanin@virtuozzo.com>
Reviewed-by: Roman Kagan <rkagan@virtuozzo.com>
CC: Gleb Natapov <gleb@kernel.org>
CC: Paolo Bonzini <pbonzini@redhat.com>
CC: Joerg Roedel <joro@8bytes.org>
CC: "K. Y. Srinivasan" <kys@microsoft.com>
CC: Haiyang Zhang <haiyangz@microsoft.com>
CC: Roman Kagan <rkagan@virtuozzo.com>
CC: Denis V. Lunev <den@openvz.org>
CC: qemu-devel@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/hyperv.c')
| -rw-r--r-- | arch/x86/kvm/hyperv.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index 599b06733f024..e8af5978762b8 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 HVCALL_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); |