From: Andrey Smetanin <asmetanin@virtuozzo.com>
To: kvm@vger.kernel.org
Cc: Gleb Natapov <gleb@kernel.org>, Joerg Roedel <joro@8bytes.org>,
qemu-devel@nongnu.org, Roman Kagan <rkagan@virtuozzo.com>,
"Denis V. Lunev" <den@openvz.org>,
Paolo Bonzini <pbonzini@redhat.com>,
"K. Y. Srinivasan" <kys@microsoft.com>,
Haiyang Zhang <haiyangz@microsoft.com>
Subject: [Qemu-devel] [PATCH v2 4/5] kvm/x86: Reject Hyper-V hypercall continuation
Date: Thu, 21 Jan 2016 17:01:12 +0300 [thread overview]
Message-ID: <1453384873-14832-5-git-send-email-asmetanin@virtuozzo.com> (raw)
In-Reply-To: <1453384873-14832-1-git-send-email-asmetanin@virtuozzo.com>
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
---
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
next prev parent reply other threads:[~2016-01-21 14:03 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-21 14:01 [Qemu-devel] [PATCH v2 0/5] KVM: Hyper-V VMBus hypercalls Andrey Smetanin
2016-01-21 14:01 ` [Qemu-devel] [PATCH v2 1/5] kvm/x86: Rename Hyper-V long spin wait hypercall Andrey Smetanin
2016-01-21 14:01 ` [Qemu-devel] [PATCH v2 2/5] drivers/hv: Move VMBus hypercall codes into Hyper-V UAPI header Andrey Smetanin
2016-01-21 14:01 ` [Qemu-devel] [PATCH v2 3/5] kvm/x86: Pass return code of kvm_emulate_hypercall Andrey Smetanin
2016-01-21 14:01 ` Andrey Smetanin [this message]
2016-01-21 14:01 ` [Qemu-devel] [PATCH v2 5/5] kvm/x86: Hyper-V VMBus hypercall userspace exit Andrey Smetanin
2016-02-10 16:48 ` Paolo Bonzini
2016-02-02 11:34 ` [Qemu-devel] [PATCH v2 0/5] KVM: Hyper-V VMBus hypercalls Andrey Smetanin
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