search for: unshadow

...age table pages as data pages and write data to them. The pages will still be grabbed by Xen as page table pages, and lots of unnecessary page faults occur. The patch will check if the data guest writes to the page table contains valid mfn or not, if not, we believe it is a data page now and then unshadow the page. The patch improves the VT-D NIC performance a lot. Signed-off-by: Xin Xiaohui <xiaohui.xin@intel.com> _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel

# HG changeset patch # User Xiaofeng Ling <xiaofeng.ling@intel.com> # Node ID cc6e19224d0b755d24358cd15d1a40f894d320b4 # Parent b215584242c43415eccd008b90c812f3d04b398d Don''t unshadow when the shadow l2 is the current used shadow table. Otherwise, when destorying the domain, if the current sl2 is unpinned, the shadow page will be freed without accquire the shadow_lock. This may also improve the performance due to avoiding uncessary unshadow. Signed-off-by: Xiaofeng Ling <xia...

We''ve got reports of that change causing HVM data corruption issues. While I can''t see what''s wrong with the patch, I''d suggest at least reverting it from the 3.3 tree (which is what our code is based upon) for the time being. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com

All, in the light of erratum #573 I''m wondering if we need to tweak or conditionally suppress fsincos emulation. The question is whether there is any possibility for getting the emulator to hit this instruction on AMD (as no real mode emulation ought to be taking place there), i.e. whether there are places where emulation gets continued eagerly in anticipation of the need for emulation

...ect_shadow_pages > + && !kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) > kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); > > return true; > @@ -6322,7 +6323,8 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, > * and it failed try to unshadow page and re-enter the > * guest to let CPU execute the instruction. > */ > - kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); > + if (!kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) > + kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); > > /* > * If the ac...

...bottom, bottom-right) depeding on the length of the offset-vector being =, < or > to the radius. I am also not sure how to attack the problem of rounded corners of the windows decoration-frame. If the shadow-textures will align with the outter edges of the decoration-frame there will be "unshadowed" gaps at the rounded corners. If I have the shadow-textures overlap a bit inwards it might look funny if the windows opacity changes to transparent. Right now the only solution for this is to fill the inner part of the drop-shadow with a rectangle having the start-color. But this solution ca...

...agetables physically contiguous in memory using a "buddy" allocator. This allows us to use only one mfn value to designate the entire group of mfns. * We allocate a fixed amount of shadow memory at domain creation. This is shared by all vcpus. When we need more shadow pages, we begin to unshadow pages to free up more memory in approximately an LRU fashion. * We keep the p2m maps for HVM domains in a pagetable format, so that we can use them as the pagetables fo HVM guests in paging-disabled mode. So far, we have had several successes. Demand-paging accesses have been sped up by doing emu...

...OK great. But what does it scan?? - The original purpose of ipd was to scan for phf, which is a well known exploit, so read an advisory if you need any more information. However, the basic engine can be used to scan anything! It''s been rewritten to record Sendmail versions, attempt to get unshadowed password files from anonymous ftp logins, and it could even be setup to attempt to login to servers with default passwords... which ''middlefinger'' does, exploiting finger data. See the next section for more on that. - Information about phf Scanning - ipd...

Dear All: I am pretty new to xen-devel, please correct me in the following. Assume we have the following terms GPT: guest page table SPT: shadow page table (Question a) When guest OS is running, is it always using SPT for address translation? If it is the case, how does guest OS refer and modify its own GPT content? It seems that there is a page table entry in SPT for the GPT page. (Question

...ect_shadow_pages) + if (indirect_shadow_pages + && !kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); return true; @@ -6322,7 +6323,8 @@ static bool reexecute_instruction(struct kvm_vcpu *vcpu, gva_t cr2, * and it failed try to unshadow page and re-enter the * guest to let CPU execute the instruction. */ - kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); + if (!kvmi_tracked_gfn(vcpu, gpa_to_gfn(gpa))) + kvm_mmu_unprotect_page(vcpu->kvm, gpa_to_gfn(gpa)); /* * If the access faults on its page table, it can no...

Hi, Just trying to consolidate my knowledge of Dovecot and I want to understand various things rather than just key out lines of config in dovecot.conf with the hope of it working. What I wanted to clarify is my understanding the "socket listen" section of the config file. From my limited understanding, this section details how other processes can access the userdb defined in

...      dmx: Add _X_ATTRIBUTE_PRINTF to dmxConfigLog() & dmxConfigOutput()       dmx: move format strings inline so gcc can check       dmx: fix printf format argument warnings       dmx: remove unused variables       dmx: attempt to untangle nested loops using same index variable       dmx: more unshadowing of variables       dmx: glxproxy prototype cleanup       dmx: remove redundant declaration of dmxFontPrivateIndex from dmxfont.h       dmx: remove redundant redeclarations of variables from other headers       dmx: Mark glxIsExtensionSupported as a const char *       dmx: constify GCOps & GC...

...dmx: Add _X_ATTRIBUTE_PRINTF to dmxConfigLog() & dmxConfigOutput() dmx: move format strings inline so gcc can check dmx: fix printf format argument warnings dmx: remove unused variables dmx: attempt to untangle nested loops using same index variable dmx: more unshadowing of variables dmx: glxproxy prototype cleanup dmx: remove redundant declaration of dmxFontPrivateIndex from dmxfont.h dmx: remove redundant redeclarations of variables from other headers dmx: Mark glxIsExtensionSupported as a const char * dmx: constify GCOps & GC...

...t: SetActionMap constructing a dataformat for keyboard and mouse. dinput: SetActionMap and queue_event setting mapped data. include: Corrected the value of the DIEDFL_ATTACHEDONLY flag. Maarten Lankhorst (1): winegstreamer: Fix setcaps call. Marcus Meissner (19): oleaut32: Unshadow cmp to make code work (Coverity). shell32: Remove superflous NULL check (Coverity). strmbase: Move NULL check up a bit (Coverity). quartz: Removed useless NULL check (Coverity). ole32: Access the array entry, not the array (Coverity). gameux: Revert NULL ptr check and...

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place

The KVM introspection subsystem provides a facility for applications running on the host or in a separate VM, to control the execution of other VM-s (pause, resume, shutdown), query the state of the vCPUs (GPRs, MSRs etc.), alter the page access bits in the shadow page tables (only for the hardware backed ones, eg. Intel's EPT) and receive notifications when events of interest have taken place