Re: [Xen-devel] [PATCH v2] libxl: put RSDP for PVH guest near 4GB

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Wed, Jan 24, 2018 at 09:42:57AM -0500, Boris Ostrovsky wrote:
> On 01/24/2018 09:25 AM, Juergen Gross wrote:
> > On 24/01/18 15:10, Boris Ostrovsky wrote:
> >>
> >> I suspect we can do as little as removing "#ifdef CONFIG_KEXEC" around
> >> acpi_rsdp in drivers/acpi/osl.c and then assigning it the value in
> >> pvh_start_info.rsdp_paddr. (I haven't tried it)
> > That was the approach I started with (more or less). It was seen as a
> > layering violation.
> >
> > I'd rather take the approach like in
> >
> > https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?h=x86/boot&id=0c89cf36424f7c1177de8a5712514d7cc2eb369f
> >
> > and have a PVH specific acpi_arch_get_root_pointer() instead one in
> > arch/x86/kernel/acpi/boot.c. This can later be modified easily to
> > take the RSDP address from boot params instead.
> 
> Sure.
> 
> In the meantime I assume this patch will be reverted from staging until
> Linux is taken care of?

Do you mean we need to wait until all stable kernels get the backport?

Wei.

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