Re: [PATCH 01/24] PVH xen: Add readme docs/misc/pvh-readme.txt

[Ian Campbell <Ian.Campbell@citrix.com>]

On Wed, 2013-07-17 at 19:32 -0700, Mukesh Rathor wrote:
> Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
> ---
>  docs/misc/pvh-readme.txt |   40 ++++++++++++++++++++++++++++++++++++++++
>  1 files changed, 40 insertions(+), 0 deletions(-)
>  create mode 100644 docs/misc/pvh-readme.txt
> 
> diff --git a/docs/misc/pvh-readme.txt b/docs/misc/pvh-readme.txt
> new file mode 100644
> index 0000000..a813373
> --- /dev/null
> +++ b/docs/misc/pvh-readme.txt
> @@ -0,0 +1,40 @@
> +
> +PVH : a pv guest running in an HVM container. HAP is required for PVH.
> +
> +See: http://blog.xen.org/index.php/2012/10/23/the-paravirtualization-spectrum-part-1-the-ends-of-the-spectrum/
> +
> +
> +The initial phase targets the booting of a 64bit UP/SMP linux guest in PVH 
> +mode. This is done by adding: pvh=1 in the config file. xl, and not xm, is 
> +supported. Phase I patches are broken into three parts:
> +   - xen changes for booting of 64bit PVH guest
> +   - tools changes for creating a PVH guest
> +   - boot of 64bit dom0 in PVH mode.
> +
> +The best way to find all the patches is to use "git log|grep -i PVH", both
> +in xen and linux tree.
> +
> +Following fixme's exist in the code:
> +  - Add support for more memory types in arch/x86/hvm/mtrr.c.
> +  - arch/x86/time.c: support more tsc modes.
> +  - check_guest_io_breakpoint(): check/add support for IO breakpoint.
> +  - implement arch_get_info_guest() for pvh.
> +  - vmxit_msr_read(): during AMD port go thru hvm_msr_read_intercept() again.
> +  - verify bp matching on emulated instructions will work same as HVM for
> +    PVH guest. see instruction_done() and check_guest_io_breakpoint().
> +
> +Following remain to be done for PVH:
> +   - AMD port.
> +   - 32bit PVH guest support in both linux and xen. Xen changes are tagged 
> +     "32bitfixme".
> +   - Add support for monitoring guest behavior. See hvm_memory_event* functions
> +     in hvm.c
> +   - vcpu hotplug support
> +   - Live migration of PVH guests.
> +   - Avail PVH dom0 of posted interrupts. (This will be a big win).
> +
> +
> +Note, any emails to must be cc'd to Xen-devel@lists.xensource.com.

lists.xen.org please, lets not get two domain names behind ;-)

Is there a description somewhere in the series of what PVH means in
terms of the guest visible ABI? i.e. documentation of the delta from the
regular PV mode? I had a skim through and didn't spot it.

> +
> +Mukesh Rathor
> +mukesh.rathor [at] oracle [dot] com