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Commit 39e95433 authored by Jan Beulich's avatar Jan Beulich Committed by Ingo Molnar
Browse files

x86-64: Reduce amount of redundant code generated for invalidate_interruptNN 



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: default avatarJan Beulich <jbeulich@suse.com>
Reviewed-by: default avatarAndi Kleen <ak@linux.intel.com>
Link: http://lkml.kernel.org/r/4ED4CA230200007800064065@nat28.tlf.novell.com


Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 70ea6855

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 \