- 17 May, 2010 40 commits
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Gleb Natapov authored
Remove old task switch code from x86.c Signed-off-by:
Gleb Natapov <gleb@redhat.com> Signed-off-by:
Marcelo Tosatti <mtosatti@redhat.com>
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Gleb Natapov authored
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Gleb Natapov authored
Implement emulation of 16/32 bit task switch in emulator.c Signed-off-by:
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Gleb Natapov authored
Provide get_cached_descriptor(), set_cached_descriptor(), get_segment_selector(), set_segment_selector(), get_gdt(), write_std() callbacks. Signed-off-by:
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Gleb Natapov authored
When x86_emulate_insn() does not know how to emulate instruction it exits via cannot_emulate label in all cases except when emulating grp3. Fix that. Signed-off-by:
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Gleb Natapov authored
If LOCK prefix is used dest arg should be memory, otherwise instruction should generate #UD. Signed-off-by:
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Gleb Natapov authored
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Gleb Natapov authored
Return X86EMUL_PROPAGATE_FAULT is fault was injected. Also inject #UD for those instruction when appropriate. Signed-off-by:
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Gleb Natapov authored
If CR4.DE=1 access to registers DR4/DR5 cause #UD. Signed-off-by:
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Gleb Natapov authored
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Gleb Natapov authored
Resent spec says that for 0f (20|21|22|23) the 2 bits in the mod field are ignored. Interestingly enough older spec says that 11 is only valid encoding. Signed-off-by:
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Gleb Natapov authored
It is undefined and should generate #UD. Signed-off-by:
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Gleb Natapov authored
mov r/m, sreg generates #UD ins sreg is incorrect. Signed-off-by:
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Gleb Natapov authored
Eliminate the need to call back into KVM to get it from emulator. Signed-off-by:
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Gleb Natapov authored
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Gleb Natapov authored
Use (get|set)_cr callback to emulate lmsw inside emulator. Signed-off-by:
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Gleb Natapov authored
Use this callback instead of directly call kvm function. Also rename realmode_(set|get)_cr to emulator_(set|get)_cr since function has nothing to do with real mode. Signed-off-by:
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Takuya Yoshikawa authored
kvm_coalesced_mmio_init() keeps to hold the addresses of a coalesced mmio ring page and dev even after it has freed them. Also, if this function fails, though it might be rare, it seems to be suggesting the system's serious state: so we'd better stop the works following the kvm_creat_vm(). This patch clears these problems. We move the coalesced mmio's initialization out of kvm_create_vm(). This seems to be natural because it includes a registration which can be done only when vm is successfully created. Signed-off-by:
Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by:
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Gui Jianfeng authored
Make use of bool as return values, and remove some useless bool value converting. Thanks Avi to point this out. Signed-off-by:
Gui Jianfeng <guijianfeng@cn.fujitsu.com> Signed-off-by:
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Gleb Natapov authored
Mov reg, cr instruction doesn't change flags in any meaningful way, so no need to update rflags after instruction execution. Signed-off-by:
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Gleb Natapov authored
Check return value against correct define instead of open code the value. Signed-off-by:
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Gleb Natapov authored
During rep emulation access length to RCX depends on current address mode. Signed-off-by:
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Gleb Natapov authored
Set correct operation length. Add RAX (64bit) handling. Signed-off-by:
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Avi Kivity authored
Commit fb341f57 removed the pte prefetch on guest invlpg, citing guest races. However, the SDM is adamant that prefetch is allowed: "The processor may create entries in paging-structure caches for translations required for prefetches and for accesses that are a result of speculative execution that would never actually occur in the executed code path." And, in fact, there was a race in the prefetch code: we picked up the pte without the mmu lock held, so an older invlpg could install the pte over a newer invlpg. Reinstate the prefetch logic, but this time note whether another invlpg has executed using a counter. If a race occured, do not install the pte. Signed-off-by:
Avi Kivity <avi@redhat.com> Signed-off-by:
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Avi Kivity authored
The update_pte() path currently uses a nontrapping spte when a nonpresent (or nonaccessed) gpte is written. This is fine since at present it is only used on sync pages. However, on an unsync page this will cause an endless fault loop as the guest is under no obligation to invlpg a gpte that transitions from nonpresent to present. Needed for the next patch which reinstates update_pte() on invlpg. Signed-off-by:
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Avi Kivity authored
Currently emulated atomic operations are immediately followed by a non-atomic operation, so that kvm_mmu_pte_write() can be invoked. This updates the mmu but undoes the whole point of doing things atomically. Fix by only performing the atomic operation and the mmu update, and avoiding the non-atomic write. Signed-off-by:
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Avi Kivity authored
Once upon a time, locked operations were emulated while holding the mmu mutex. Since mmu pages were write protected, it was safe to emulate the writes in a non-atomic manner, since there could be no other writer, either in the guest or in the kernel. These days emulation takes place without holding the mmu spinlock, so the write could be preempted by an unshadowing event, which exposes the page to writes by the guest. This may cause corruption of guest page tables. Fix by using an atomic cmpxchg for these operations. Signed-off-by:
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Avi Kivity authored
kvm_mmu_pte_write() reads guest ptes in two different occasions, both to allow a 32-bit pae guest to update a pte with 4-byte writes. Consolidate these into a single read, which also allows us to consolidate another read from an invlpg speculating a gpte into the shadow page table. Signed-off-by:
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jing zhang authored
Free IRQ's and disable MSIX upon failure. Cc: Avi Kivity <avi@redhat.com> Signed-off-by:
Jing Zhang <zj.barak@gmail.com> Signed-off-by:
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Wei Yongjun authored
This patch change the errno of ioctl KVM_[UN]REGISTER_COALESCED_MMIO from -EINVAL to -ENXIO if no coalesced mmio dev exists. Signed-off-by:
Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by:
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Wei Yongjun authored
If no irq chip in kernel, ioctl KVM_IRQ_LINE will return -EFAULT. But I see in other place such as KVM_[GET|SET]IRQCHIP, -ENXIO is return. So this patch used -ENXIO instead of -EFAULT. Signed-off-by:
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Wei Yongjun authored
If no irq chip in kernel, ioctl KVM_IRQ_LINE will return -EFAULT. But I see in other place such as KVM_[GET|SET]IRQCHIP, -ENXIO is return. So this patch used -ENXIO instead of -EFAULT. Signed-off-by:
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Wei Yongjun authored
The ioctl KVM_IA64_VCPU_GET_STACK does not set the error code if copy_to_user() fail, and 0 will be return, we should use -EFAULT instead of 0 in this case, so this patch fixed it. Signed-off-by:
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Wei Yongjun authored
This patch use generic linux function native_store_idt() instead of kvm_get_idt(), and also removed the useless function kvm_get_idt(). Signed-off-by:
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Avi Kivity authored
Often an exception can help point out where things start to go wrong. Signed-off-by: -
Avi Kivity authored
Reading rip is expensive on vmx, so move it inside the tracepoint so we only incur the cost if tracing is enabled. Signed-off-by: -
Minchan Kim authored
The prep_new_page() in page allocator calls set_page_private(page, 0). So we don't need to reinitialize private of page. Signed-off-by:
Minchan Kim <minchan.kim@gmail.com> Cc: Avi Kivity<avi@redhat.com> Signed-off-by:
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Xiao Guangrong authored
This patch does: - no need call tracepoint_synchronize_unregister() when kvm module is unloaded since ftrace can handle it - cleanup ftrace's macro Signed-off-by:
Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> Signed-off-by:
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Wei Yongjun authored
If fail to create the vcpu, we should not create the debugfs for it. Signed-off-by:
Alexander Graf <agraf@suse.de> Cc: stable@kernel.org Signed-off-by:
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Wei Yongjun authored
This patch fixed possible memory leak in kvm_arch_vcpu_create() under s390, which would happen when kvm_arch_vcpu_create() fails. Signed-off-by:
Carsten Otte <cotte@de.ibm.com> Cc: stable@kernel.org Signed-off-by:
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