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Subject[PATCH 27/46] KVM: silence lapic kernel messages that can be triggered by a guest
Date
From: Gleb Natapov <gleb@redhat.com>

Some Linux versions (f8) try to read EOI register that is write only.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
---
arch/x86/kvm/lapic.c | 8 ++++----
1 files changed, 4 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 3b03ebd..fdddf48 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -591,14 +591,14 @@ static int apic_reg_read(struct kvm_lapic *apic, u32 offset, int len,
static const u64 rmask = 0x43ff01ffffffe70cULL;

if ((alignment + len) > 4) {
- printk(KERN_ERR "KVM_APIC_READ: alignment error %x %d\n",
- offset, len);
+ apic_debug("KVM_APIC_READ: alignment error %x %d\n",
+ offset, len);
return 1;
}

if (offset > 0x3f0 || !(rmask & (1ULL << (offset >> 4)))) {
- printk(KERN_ERR "KVM_APIC_READ: read reserved register %x\n",
- offset);
+ apic_debug("KVM_APIC_READ: read reserved register %x\n",
+ offset);
return 1;
}

--
1.6.4.1


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