Hello
can someone explain why intel vt-d is required for HVM ( fully virtualized VM) and not for Para-virtualized VMs.
I know that in the pci-passthrough, the VM has control of the PCI. so the PCI needs to do DMA access to the VM memory, but as this is not possible, the PCI will tell the IOMMU about the virtual address, which will be converted to the physcial address in RAM, which corresponds to the VM memory.
But what happens in case of Para-virtualization VM?
Hi.
I am writing a small OS-agnostic hypervisor as a teaching tool for my students. The hypervisor code is loaded by the code I embed in a custom MBR on the boot device when the system boots. The hypervisor code switches to 32-bit proceted mode and then IA32e (64-bit mode, paged with identity mapping of linear -- physical addresses). It then sets up the 64-bit exception handling mechanism and tests of this exception handling mechanism are successful (CPL and DPL are 0 so no stack switching is expected). E.g., divide by 0, and page faults are handled as expected.
With the help of Virtual Services, we can start of the software development life cycle. But I have one question in mind can we follow in all Development like Custom, Website and Mobile Application Development?
how to intel hd graphic driver for core 2 duo processoer with win 8 os.
Regards,
Icmkarthi,
I am looking for some information on what processor supports new virtualization features. Specifically, I am interested in the following features:
The numbers in paranthesis denote the bit position in the secondary processor execution controls -
1. EPT-violation #VE (18)
2. VMCS shadowing (14)
3. Enable VM functions (13)
4. Virtual interrupt delivery (9)
5. Apic register virtualization (8)
During vmlaunch/vmresume, several checks are performed on the guest state area. I was wondering if anyone else had noticed that Guest RSP field is never checked for a non-canonical address. The virtualization spec talks about such checks for Guest RIP or GDTR or IDTR. I was wondering why this check was not done for the Guest RSP?
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I'm aware that software can check the IA32_VMX_EPT_VPID_CAP MSR to determine if the EPT table supports access and dirty bits... However I would like to know how to identify a processor before I've purchased it that has this support.
Hi,
we're currently working in a project that involves extending the KVM hypervisor. While running the VM, we sometimes get EPT violations that shouldn't be possible from our understanding of the Intel documents.
The scenario is as follow (we use Intel VT with EPT enabled):
All guest paging structures (i.e., the paging structures _inside_ the VM) are set to non-writable on the last EPT level. In other words, whenever the guest OS writes to a guest paging structure (e.g. to map/free a page), this triggers an EPT violation.
