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About support for memory event on AMD CPUs
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- Thread-topic: About support for memory event on AMD CPUs
Dear developers,
Short version: is memory event supported on AMD CPUs or is it going to be
supported?
Long version:
Environment: LibVMI 0.15.0 + Xen 4.14.3 on an **AMD CPU** (5950x), 64-bit
Debian 11 Dom0.
What I am trying to accomplish: register a **memory event** handler, so that
I can capture all memory accesses within a specific range issued by any thread,
or all memory accesses within any range issued by a specific thread.
What I got instead: an error from LibVMI saying
"xc_hvm_set_mem_access failed with code: -1".
Some investigation: by inspecting the source code of LibVMI, I find the direct
cause is one of the libxc functions, 1) xc_set_mem_access or
2) xc_altp2m_set_mem_access, returned error code -1.
After some searching, I found someone else having a similar problem [1]. I also
noted LibVMI says:
> Currently only the Xen Hypervisor provides these features,
> and some of these are specifically only available on Intel CPUs
However, I can't find the exact confirmation for the availability of memory
event on AMD CPUs from https://wiki.xenproject.org.
Any suggestion?
(Sorry I was sending this email to the wrong place)
[1] https://github.com/libvmi/libvmi/pull/709#discussion_r353729777
Untitled YAN
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