[Xen-ia64-devel] Question about vmx_ivt.S

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[Xen-ia64-devel] Question about vmx_ivt.S

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Tristan Gingold <tgingold@xxxxxxx>

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Sun, 30 Sep 2007 17:26:27 +0200

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Hi,

for both itlb and dtlb handlers, while swapping first and found entries:
    st8 [r16] = r29, VLE_ITIR_OFFSET - VLE_TITAG_OFFSET
    st8 [r28] = r22, VLE_ITIR_OFFSET - VLE_TITAG_OFFSET
    extr.u r19 = r27, 56, 4
    mf
    ;;
    ld8 r29 = [r16]
    ld8 r22 = [r28]
    dep r27 = r0, r27, 56, 4
    dep r25 = r19, r25, 56, 4

Is the mf (memory fence) necessary ?  The VHPT is per-cpu.

Tristan.

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