Re: [Xen-devel] [PATCH RFC v2] Add SUPPORT.md

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

> +### Soft-reset for PV guests

s/PV/HVM/


> +
> +    Status: Supported
> +     
> +Soft-reset allows a new kernel to start 'from scratch' with a fresh VM 
> state, 
> +but with all the memory from the previous state of the VM intact.
> +This is primarily designed to allow "crash kernels", 
> +which can do core dumps of memory to help with debugging in the event of a 
> crash.
> +
> +### xentrace
> +
> +    Status, x86: Supported
> +
> +Tool to capture Xen trace buffer data
> +
> +### gcov
> +
> +    Status: Supported, Not security supported
> +
> +Export hypervisor coverage data suitable for analysis by gcov or lcov.
> +
> +## Memory Management
> +
> +### Memory Ballooning
> +
> +    Status: Supported
> +
> +### Memory Sharing
> +
> +    Status, x86 HVM: Tech Preview
> +    Status, ARM: Tech Preview
> +
> +Allow sharing of identical pages between guests
> +
> +### Memory Paging
> +
> +    Status, x86 HVM: Experimenal
> +
> +Allow pages belonging to guests to be paged to disk
> +
> +### Transcendent Memory
> +
> +    Status: Experimental
> +
> +[XXX Add description]

Guests with tmem drivers autoballoon memory out allowing a fluid
and dynamic memory allocation - in effect memory overcommit without
the need to swap. Only works with Linux guests (as it requires
OS drivers).

..snip..
> +### Live Patching
> +
> +    Status, x86: Supported
> +    Status, ARM: Experimental
> +
> +Compile time disabled

for ARM.

As the patch will do:

 config LIVEPATCH
-       bool "Live patching support (TECH PREVIEW)"
-       default n
+       bool "Live patching support"
+       default X86
        depends on HAS_BUILD_ID = "y"
        ---help---
          Allows a running Xen hypervisor to be dynamically patched using

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