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>

diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 0a6cc67..ea618b7 100644 (file)
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -434,13 +434,13 @@ 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             )
        ),