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authorAndrey Smetanin <asmetanin@virtuozzo.com>2015-12-28 18:27:23 +0300
committerPaolo Bonzini <pbonzini@redhat.com>2016-01-08 19:04:42 +0100
commit7be58a6488a9d36886d9423a1ed54fe104c7b182 (patch)
tree88a170f37c39e9be625783cc157e40d90547cbd7 /arch/x86/kvm/hyperv.c
parent23a3b201fd187f1e7af573b3794c3c5ebf7d2c06 (diff)
kvm/x86: Skip SynIC vector check for QEMU side
QEMU zero-inits Hyper-V SynIC vectors. We should allow that, and don't reject zero values if set by the host. 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: 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.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index abfb9208ae53..ddae13eed075 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -72,12 +72,13 @@ static bool synic_has_vector_auto_eoi(struct kvm_vcpu_hv_synic *synic,
return false;
}
-static int synic_set_sint(struct kvm_vcpu_hv_synic *synic, int sint, u64 data)
+static int synic_set_sint(struct kvm_vcpu_hv_synic *synic, int sint,
+ u64 data, bool host)
{
int vector;
vector = data & HV_SYNIC_SINT_VECTOR_MASK;
- if (vector < 16)
+ if (vector < 16 && !host)
return 1;
/*
* Guest may configure multiple SINTs to use the same vector, so
@@ -247,7 +248,7 @@ static int synic_set_msr(struct kvm_vcpu_hv_synic *synic,
break;
}
case HV_X64_MSR_SINT0 ... HV_X64_MSR_SINT15:
- ret = synic_set_sint(synic, msr - HV_X64_MSR_SINT0, data);
+ ret = synic_set_sint(synic, msr - HV_X64_MSR_SINT0, data, host);
break;
default:
ret = 1;