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KVM: x86: Print error code in exception injection tracepoint iff valid

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Print the error code in the exception injection tracepoint if and only if
the exception has an error code.  Define the entire error code sequence
as a set of formatted strings, print empty strings if there's no error
code, and abuse __print_symbolic() by passing it an empty array to coerce
it into printing the error code as a hex string.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Signed-off-by: Maciej S. Szmigiero <maciej.szmigiero@oracle.com>
Message-Id: <e8f0511733ed2a0410cbee8a0a7388eac2ee5bac.1651440202.git.maciej.szmigiero@oracle.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Sean Christopherson 2022-05-02 00:07:32 +02:00 committed by Paolo Bonzini
parent a61d7c5432
commit 21d4c575eb
1 changed files with 4 additions and 3 deletions
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7
arch/x86/kvm/trace.h
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@ -376,10 +376,11 @@ TRACE_EVENT(kvm_inj_exception,
__entry->reinjected = reinjected;
),
TP_printk("%s (0x%x)%s",
TP_printk("%s%s%s%s%s",
__print_symbolic(__entry->exception, kvm_trace_sym_exc),
/* FIXME: don't print error_code if not present */
__entry->has_error ? __entry->error_code : 0,
!__entry->has_error ? "" : " (",
!__entry->has_error ? "" : __print_symbolic(__entry->error_code, { }),
!__entry->has_error ? "" : ")",
__entry->reinjected ? " [reinjected]" : "")
);