Software Archive
Read-only legacy content
17061 Discussions

MMIO access using the EPT mechanism

Suresh_N_Intel
Employee
‎11-25-2018 11:56 PM
453 Views

Hi All,

We are trying to access the registers of a device which is memory mapped in the host (MMIO) from the guest.

The Atom core we are using doesn't support the VT-d mechanism.

The register access is working fine using the emulation in QEMU or in the kernel using KVM.

But, the idea is to use the EPT to directly access the registers without the VM-exits.

Is it possible to achieve this MMIO access from guest using the EPT ?

Or I am I missing something ?

Regards

Suresh N

0 Kudos

Link Copied

0 Replies
Reply

Community support is provided during standard business hours (Monday to Friday 7AM - 5PM PST). Other contact methods are available here.

Intel does not verify all solutions, including but not limited to any file transfers that may appear in this community. Accordingly, Intel disclaims all express and implied warranties, including without limitation, the implied warranties of merchantability, fitness for a particular purpose, and non-infringement, as well as any warranty arising from course of performance, course of dealing, or usage in trade.

For more complete information about compiler optimizations, see our Optimization Notice.