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Avi Kivity 1b7fcd3263 KVM: MMU: Fix false flooding when a pte points to page table ... The KVM MMU tries to detect when a speculative pte update is not actually used by demand fault, by checking the accessed bit of the shadow pte. If the shadow pte has not been accessed, we deem that page table flooded and remove the shadow page table, allowing further pte updates to proceed without emulation. However, if the pte itself points at a page table and only used for write operations, the accessed bit will never be set since all access will happen through the emulator. This is exactly what happens with kscand on old (2.4.x) HIGHMEM kernels. The kernel points a kmap_atomic() pte at a page table, and then proceeds with read-modify-write operations to look at the dirty and accessed bits. We get a false flood trigger on the kmap ptes, which results in the mmu spending all its time setting up and tearing down shadows. Fix by setting the shadow accessed bit on emulated accesses. Signed-off-by: Avi Kivity <avi@qumranet.com>		17 years ago
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Kconfig	KVM: Add kvm trace userspace interface	17 years ago
Makefile	KVM: Add kvm trace userspace interface	17 years ago
i8254.c	KVM: PIT: support mode 3	17 years ago
i8254.h	KVM: Add reset support for in kernel PIT	17 years ago
i8259.c	…
irq.c	KVM: migrate PIT timer	17 years ago
irq.h	KVM: migrate PIT timer	17 years ago
kvm_svm.h	…
lapic.c	KVM: VMX: move APIC_ACCESS trace entry to generic code	17 years ago
lapic.h	KVM: add statics were possible, function definition in lapic.h	17 years ago
mmu.c	KVM: MMU: Fix false flooding when a pte points to page table	17 years ago
mmu.h	KVM: MMU: Fix false flooding when a pte points to page table	17 years ago
paging_tmpl.h	KVM: MMU: Fix printk() format string	17 years ago
svm.c	KVM: SVM: Fake MSR_K7 performance counters	17 years ago
svm.h	KVM: x86: hardware task switching support	17 years ago
tss.h	KVM: x86: hardware task switching support	17 years ago
vmx.c	KVM: VMX: Trivial vmcs_write64() code simplification	17 years ago
vmx.h	KVM: VMX: Enable EPT feature for KVM	17 years ago
x86.c	KVM: add missing kvmtrace bits	17 years ago
x86_emulate.c	KVM: x86 emulator: fix hypercall return value on AMD	17 years ago