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Re: [PATCH] x86/platform: make XENPF_get_dom0_console actually usable
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Mon, 13 Mar 2023 14:45:39 +0100
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Mon, 13 Mar 2023 13:46:09 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Mon, Feb 13, 2023 at 03:51:50PM +0100, Jan Beulich wrote:
> struct dom0_vga_console_info has been extended in the past, and it may
> be extended again. The use in PV Dom0's start info already covers for
> that by supplying the size of the provided data. For the recently
> introduced platform-op size needs providing similarly. Go the easiest
> available route and simply supply size via the hypercall return value.
>
> While there also add a build-time check that possibly future growth of
> the struct won't affect xen_platform_op_t's size.
>
> Fixes: 4dd160583c79 ("x86/platform: introduce hypercall to get initial video
> console settings")
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
Acked-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>
With the added comment.
Thanks, Roger.
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