Avi Kivity d3c422bd33 KVM: MMU: Fix incorrect direct page write protection due to ro host page ... If KVM sees a read-only host page, it will map it as read-only to prevent breaking a COW. However, if the page was part of a large guest page, KVM incorrectly extends the write protection to the entire large page frame instead of limiting it to the normal host page. This results in the instantiation of a new shadow page with read-only access. If this happens for a MOVS instruction that moves memory between two normal pages, within a single large page frame, and mapped within the guest as a large page, and if, in addition, the source operand is not writeable in the host (perhaps due to KSM), then KVM will instantiate a read-only direct shadow page, instantiate an spte for the source operand, then instantiate a new read/write direct shadow page and instantiate an spte for the destination operand. Since these two sptes are in different shadow pages, MOVS will never see them at the same time and the guest will not make progress. Fix by mapping the direct shadow page read/write, and only marking the host page read-only. Signed-off-by: Avi Kivity <avi@redhat.com>		2011-01-12 11:30:51 +02:00
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emulate.c	KVM: x86 emulator: simplify exception generation	2011-01-12 11:29:58 +02:00
i8254.c	KVM: fix typo in copyright notice	2010-10-24 10:53:14 +02:00
i8254.h	KVM: x86: Introduce a workqueue to deliver PIT timer interrupts	2010-08-01 10:46:49 +03:00
i8259.c	KVM: i8259: initialize isr_ack	2011-01-02 11:52:48 +02:00
irq.c	KVM: fix typo in copyright notice	2010-10-24 10:53:14 +02:00
irq.h	KVM: Convert PIC lock from raw spinlock to ordinary spinlock	2010-10-24 10:52:56 +02:00
Kconfig	KVM: Halt vcpu if page it tries to access is swapped out	2011-01-12 11:21:39 +02:00
kvm_cache_regs.h	KVM: X86: Introduce generic guest-mode representation	2011-01-12 11:30:04 +02:00
kvm_timer.h	KVM: arch/x86/kvm/kvm_timer.h checkpatch cleanup	2010-05-17 12:14:42 +03:00
lapic.c	KVM: Avoid double interrupt injection with vapic	2011-01-12 11:23:36 +02:00
lapic.h	KVM: Add HYPER-V apic access MSRs	2010-03-01 12:36:00 -03:00
Makefile	KVM: x86: Makefile clean up	2011-01-12 11:29:08 +02:00
mmu_audit.c	KVM: fix typo in copyright notice	2010-10-24 10:53:14 +02:00
mmu.c	KVM: MMU: Make the way of accessing lpage_info more generic	2011-01-12 11:30:47 +02:00
mmu.h	KVM: MMU: Don't track nested fault info in error-code	2010-10-24 10:52:55 +02:00
mmutrace.h	KVM: MMU: support disable/enable mmu audit dynamicly	2010-10-24 10:51:56 +02:00
paging_tmpl.h	KVM: MMU: Fix incorrect direct page write protection due to ro host page	2011-01-12 11:30:51 +02:00
svm.c	KVM: SVM: Add xsetbv intercept	2011-01-12 11:30:49 +02:00
timer.c	KVM: fix typo in copyright notice	2010-10-24 10:53:14 +02:00
trace.h	KVM: Add instruction-set-specific exit qualifications to kvm_exit trace	2011-01-12 11:29:41 +02:00
tss.h	KVM: x86: hardware task switching support	2008-04-27 12:00:39 +03:00
vmx.c	KVM: VMX: add module parameter to avoid trapping HLT instructions (v5)	2011-01-12 11:30:46 +02:00
x86.c	KVM: MMU: retry #PF for softmmu	2011-01-12 11:30:41 +02:00
x86.h	KVM: SVM: Do not report xsave in supported cpuid	2010-12-08 17:28:37 +02:00