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authorVitaly Kuznetsov <vkuznets@redhat.com>2019-03-27 17:12:20 +0300
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2019-05-16 10:17:22 +0300
commit72ba8a7a7c8e1866ad62686e9bc0131772414591 (patch)
treeab4b00a4f3a03230d7c6c16c4f8f030521354f53
parenteca5f4de2f5f3eab421b881368cb680369a1cb38 (diff)
downloadlinux-72ba8a7a7c8e1866ad62686e9bc0131772414591.tar.xz
KVM: x86: avoid misreporting level-triggered irqs as edge-triggered in tracing
[ Upstream commit 7a223e06b1a411cef6c4cd7a9b9a33c8d225b10e ] In __apic_accept_irq() interface trig_mode is int and actually on some code paths it is set above u8: kvm_apic_set_irq() extracts it from 'struct kvm_lapic_irq' where trig_mode is u16. This is done on purpose as e.g. kvm_set_msi_irq() sets it to (1 << 15) & e->msi.data kvm_apic_local_deliver sets it to reg & (1 << 15). Fix the immediate issue by making 'tm' into u16. We may also want to adjust __apic_accept_irq() interface and use proper sizes for vector, level, trig_mode but this is not urgent. Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
-rw-r--r--arch/x86/kvm/trace.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 6b06ab8748dd..005a5b8d5628 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -415,13 +415,13 @@ TRACE_EVENT(kvm_apic_ipi,
);
TRACE_EVENT(kvm_apic_accept_irq,
- TP_PROTO(__u32 apicid, __u16 dm, __u8 tm, __u8 vec),
+ TP_PROTO(__u32 apicid, __u16 dm, __u16 tm, __u8 vec),
TP_ARGS(apicid, dm, tm, vec),
TP_STRUCT__entry(
__field( __u32, apicid )
__field( __u16, dm )
- __field( __u8, tm )
+ __field( __u16, tm )
__field( __u8, vec )
),