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KVM: MMU: Simplify calculation of pte access
authorAvi Kivity <avi@qumranet.com>
Sun, 9 Dec 2007 14:15:46 +0000 (16:15 +0200)
committerAvi Kivity <avi@qumranet.com>
Wed, 30 Jan 2008 15:53:20 +0000 (17:53 +0200)
commitfe135d2ceb3d7dc08151b3cbad96565d02cc8676
tree7dec07ec0a32a53f003551802cb73c4ce3373527tree | snapshot
parentb3e4e63fd9ee8cd5d9047b89e0d463d5c48ee5b5commit | diff
KVM: MMU: Simplify calculation of pte access

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>
drivers/kvm/mmu.c diff | blob | history
drivers/kvm/paging_tmpl.h diff | blob | history
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