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List: kvm
Subject: [PATCH v2 6/7] kvm/x86: Skip SynIC vector check for QEMU side
From: Andrey Smetanin <asmetanin () virtuozzo ! com>
Date: 2015-12-28 15:27:23
Message-ID: 1451316444-31766-7-git-send-email-asmetanin () virtuozzo ! com
[Download RAW message or body]
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
---
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
--
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