QEMU zero-inits Hyper-V SynIC vectors. We should allow that, and don't reject zero values if set by the host.
ms commit - 7be58a6488a9d36886d9423a1ed54fe104c7b182. Signed-off-by: Andrey Smetanin <[email protected]> Reviewed-by: Roman Kagan <[email protected]> CC: Gleb Natapov <[email protected]> CC: Paolo Bonzini <[email protected]> CC: Roman Kagan <[email protected]> CC: Denis V. Lunev <[email protected]> CC: [email protected] Signed-off-by: Paolo Bonzini <[email protected]> --- arch/x86/kvm/hyperv.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index abfb920..ddae13e 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; -- 2.4.3 _______________________________________________ Devel mailing list [email protected] https://lists.openvz.org/mailman/listinfo/devel
