x86-64: Reduce amount of redundant code generated for invalidate_interruptNN (39e95433) · Commits · 戴 / test

Previously these up to 32 entry points, consisting of all the same code except for their very first instruction, consumed 0x70 bytes per instance. Just like for device interrupt entry points, fold them together so that they all use a single instance of the code after having pushed their vector indicator (resulting in 0x10 bytes per instance, to retain 16-byte alignment of the individual entry points). Signed-off-by:

Jan Beulich <jbeulich@suse.com> Reviewed-by:

Andi Kleen <ak@linux.intel.com> Link: http://lkml.kernel.org/r/4ED4CA230200007800064065@nat28.tlf.novell.com Signed-off-by:

Ingo Molnar <mingo@elte.hu>

arch/x86/kernel/entry_64.S

+12 −3

Original line number	Diff line number	Diff line
		@@ -951,6 +951,7 @@ END(common_interrupt)
		ENTRY(\sym)
		INTR_FRAME
		pushq_cfi $~(\num)
		.Lcommon_\sym:
		interrupt \do_sym
		jmp ret_from_intr
		CFI_ENDPROC
		@@ -974,13 +975,21 @@ apicinterrupt X86_PLATFORM_IPI_VECTOR \
		x86_platform_ipi smp_x86_platform_ipi

		#ifdef CONFIG_SMP
		.irp idx,0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, \
		ALIGN
		INTR_FRAME
		.irp idx,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15, \
		16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31
		.if NUM_INVALIDATE_TLB_VECTORS > \idx
		apicinterrupt (INVALIDATE_TLB_VECTOR_START)+\idx \
		invalidate_interrupt\idx smp_invalidate_interrupt
		ENTRY(invalidate_interrupt\idx)
		pushq_cfi $~(INVALIDATE_TLB_VECTOR_START+\idx)
		jmp .Lcommon_invalidate_interrupt0
		CFI_ADJUST_CFA_OFFSET -8
		END(invalidate_interrupt\idx)
		.endif
		.endr
		CFI_ENDPROC
		apicinterrupt INVALIDATE_TLB_VECTOR_START, \
		invalidate_interrupt0, smp_invalidate_interrupt
		#endif

		apicinterrupt THRESHOLD_APIC_VECTOR \

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