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It is identical to the checks done in __trace_var. The commit message of 9a86ac1aa3d2ebe1be05dc7fe78dd6759aa3241d ("xentrace 5/7: Additional tracing for the shadow code.") gives no indication what the benefit of this function is. Signed-off-by: Olaf Hering --- xen/arch/x86/hvm/svm/svm.c | 2 -- xen/arch/x86/hvm/vmx/vmx.c | 2 -- xen/common/trace.c | 26 -------------------------- xen/include/xen/trace.h | 2 -- 4 files changed, 32 deletions(-) diff --git a/xen/arch/x86/hvm/svm/svm.c b/xen/arch/x86/hvm/svm/svm.c index 59a6e88dff..c10d0015e8 100644 --- a/xen/arch/x86/hvm/svm/svm.c +++ b/xen/arch/x86/hvm/svm/svm.c @@ -2812,8 +2812,6 @@ void svm_vmexit_handler(void) =20 if ( rc ) { - if ( trace_will_trace_event(TRC_SHADOW) ) - break; if ( hvm_long_mode_active(v) ) HVMTRACE_LONG_2D(PF_XEN, regs->error_code, TRC_PAR_LONG(va= )); else diff --git a/xen/arch/x86/hvm/vmx/vmx.c b/xen/arch/x86/hvm/vmx/vmx.c index 40767b94c3..08dd297cae 100644 --- a/xen/arch/x86/hvm/vmx/vmx.c +++ b/xen/arch/x86/hvm/vmx/vmx.c @@ -4352,8 +4352,6 @@ void vmx_vmexit_handler(struct cpu_user_regs *regs) =20 if ( paging_fault(exit_qualification, regs) ) { - if ( trace_will_trace_event(TRC_SHADOW) ) - break; if ( hvm_long_mode_active(v) ) HVMTRACE_LONG_2D(PF_XEN, regs->error_code, TRC_PAR_LONG(exit_qualification) ); diff --git a/xen/common/trace.c b/xen/common/trace.c index 77f8ce0ce5..60db45104e 100644 --- a/xen/common/trace.c +++ b/xen/common/trace.c @@ -308,32 +308,6 @@ static int tb_set_size(unsigned int pages) return alloc_trace_bufs(pages); } =20 -int trace_will_trace_event(u32 event) -{ - if ( !tb_init_done ) - return 0; - - /* - * Copied from __trace_var() - */ - if ( (tb_event_mask & event) =3D=3D 0 ) - return 0; - - /* match class */ - if ( ((tb_event_mask >> TRC_CLS_SHIFT) & (event >> TRC_CLS_SHIFT)) =3D= =3D 0 ) - return 0; - - /* then match subclass */ - if ( (((tb_event_mask >> TRC_SUBCLS_SHIFT) & 0xf ) - & ((event >> TRC_SUBCLS_SHIFT) & 0xf )) =3D=3D 0 ) - return 0; - - if ( !cpumask_test_cpu(smp_processor_id(), &tb_cpu_mask) ) - return 0; - - return 1; -} - /** * init_trace_bufs - performs initialization of the per-cpu trace buffers. * diff --git a/xen/include/xen/trace.h b/xen/include/xen/trace.h index 055883287e..6e9f80dd94 100644 --- a/xen/include/xen/trace.h +++ b/xen/include/xen/trace.h @@ -35,8 +35,6 @@ void init_trace_bufs(void); /* used to retrieve the physical address of the trace buffers */ int tb_control(struct xen_sysctl_tbuf_op *tbc); =20 -int trace_will_trace_event(u32 event); - void __trace_var(uint32_t event, bool cycles, unsigned int extra, const vo= id *); =20 static inline void trace_var(uint32_t event, bool cycles, unsigned int ext= ra,