KVM: MMU: Simplify calculation of pte access

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The nx bit is awkwardly placed in the 63rd bit position; furthermore it
has a reversed meaning compared to the other bits, which means we can't use
a bitwise and to calculate compounded access masks.

So, we simplify things by creating a new 3-bit exec/write/user access word,
and doing all calculations in that.

Signed-off-by: Avi Kivity <avi@qumranet.com>

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Avi Kivity 2007-12-09 16:15:46 +02:00

parent b3e4e63fd9

commit fe135d2ceb

2 changed files with 43 additions and 29 deletions

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14

drivers/kvm/mmu.c

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58

drivers/kvm/paging_tmpl.h

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