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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>
This commit is contained in:
Andrey Smetanin 2015-12-28 18:27:23 +03:00 committed by Paolo Bonzini
parent 23a3b201fd
commit 7be58a6488
1 changed files with 4 additions and 3 deletions
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7
arch/x86/kvm/hyperv.c
View File

@ -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;