Avi Kivity wrote:
Avi Kivity wrote:
1. Add per-cpu IDT
Or we could have just two IDTs - one with IST and one without. I
clocked LIDT at 58 cycles (and we need two per heavyweight switch), so
it's not that wonderful.
This makes the whole thing unworthwhile. The vmload/vmsave pair costs
only 200 cycles (I should have started with this), and 120 cycles on the
heavyweight path plus complexity are not worth 200 cycles on the
lightweight path.
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I have a truly marvellous patch that fixes the bug which this
signature is too narrow to contain.
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