5fd5387c89
In no-direct mapping, we mark sp is 'direct' when we mapping the guest's larger page, but its access is encoded form upper page-struct entire not include the last mapping, it will cause access conflict. For example, have this mapping: [W] / PDE1 -> |---| P[W] | | LPA \ PDE2 -> |---| [R] P have two children, PDE1 and PDE2, both PDE1 and PDE2 mapping the same lage page(LPA). The P's access is WR, PDE1's access is WR, PDE2's access is RO(just consider read-write permissions here) When guest access PDE1, we will create a direct sp for LPA, the sp's access is from P, is W, then we will mark the ptes is W in this sp. Then, guest access PDE2, we will find LPA's shadow page, is the same as PDE's, and mark the ptes is RO. So, if guest access PDE1, the incorrect #PF is occured. Fixed by encode the last mapping access into direct shadow page Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> |
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.. | ||
emulate.c | ||
i8254.c | ||
i8254.h | ||
i8259.c | ||
irq.c | ||
irq.h | ||
Kconfig | ||
kvm_cache_regs.h | ||
kvm_timer.h | ||
lapic.c | ||
lapic.h | ||
Makefile | ||
mmu.c | ||
mmu.h | ||
mmutrace.h | ||
paging_tmpl.h | ||
svm.c | ||
timer.c | ||
trace.h | ||
tss.h | ||
vmx.c | ||
x86.c | ||
x86.h |