e4a81bfcaa
The x86 FPU code used to have a complex state machine where both the FPU registers and the FPU state context could be 'active' (or inactive) independently of each other - which enabled features like lazy FPU restore. Much of this complexity is gone in the current code: now we basically can have FPU-less tasks (kernel threads) that don't use (and save/restore) FPU state at all, plus full FPU users that save/restore directly with no laziness whatsoever. But the fpu::fpstate_active still carries bits of the old complexity - meanwhile this flag has become a simple flag that shows whether the FPU context saving area in the thread struct is initialized and used, or not. Rename it to fpu::initialized to express this simplicity in the name as well. Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Eric Biggers <ebiggers3@gmail.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Oleg Nesterov <oleg@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Rik van Riel <riel@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Yu-cheng Yu <yu-cheng.yu@intel.com> Link: http://lkml.kernel.org/r/20170923130016.21448-30-mingo@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
114 lines
2.2 KiB
C
114 lines
2.2 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM x86_fpu
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#if !defined(_TRACE_FPU_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_FPU_H
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#include <linux/tracepoint.h>
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DECLARE_EVENT_CLASS(x86_fpu,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu),
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TP_STRUCT__entry(
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__field(struct fpu *, fpu)
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__field(bool, initialized)
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__field(u64, xfeatures)
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__field(u64, xcomp_bv)
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),
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TP_fast_assign(
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__entry->fpu = fpu;
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__entry->initialized = fpu->initialized;
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if (boot_cpu_has(X86_FEATURE_OSXSAVE)) {
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__entry->xfeatures = fpu->state.xsave.header.xfeatures;
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__entry->xcomp_bv = fpu->state.xsave.header.xcomp_bv;
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}
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),
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TP_printk("x86/fpu: %p initialized: %d xfeatures: %llx xcomp_bv: %llx",
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__entry->fpu,
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__entry->initialized,
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__entry->xfeatures,
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__entry->xcomp_bv
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)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_state,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_before_save,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_after_save,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_before_restore,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_after_restore,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_regs_activated,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_regs_deactivated,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_activate_state,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_deactivate_state,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_init_state,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_dropped,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_copy_src,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_copy_dst,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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DEFINE_EVENT(x86_fpu, x86_fpu_xstate_check_failed,
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TP_PROTO(struct fpu *fpu),
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TP_ARGS(fpu)
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);
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#undef TRACE_INCLUDE_PATH
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#define TRACE_INCLUDE_PATH asm/trace/
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#undef TRACE_INCLUDE_FILE
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#define TRACE_INCLUDE_FILE fpu
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#endif /* _TRACE_FPU_H */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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