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Re: [PATCH 3/3] x86/trampoline: Collect other scattered trampoline symbols
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 5 Sep 2024 17:42:29 +0200
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Frediano Ziglio <frediano.ziglio@xxxxxxxxx>, Alejandro Vallejo <alejandro.vallejo@xxxxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Thu, 05 Sep 2024 15:42:39 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 05.09.2024 15:06, Andrew Cooper wrote:
> kbd_shift_flags seems especially dubious. It's a snapshot of the keyboard
> state when Xen happened to pass through the trampoline, and surely cannot be
> useful for dom0 in the slightest...
No more or less than if the kernel takes such a snapshot while booting natively.
Whatever this is used for there (it's been too long - I don't recall).
> --- a/xen/arch/x86/efi/efi-boot.h
> +++ b/xen/arch/x86/efi/efi-boot.h
> @@ -102,9 +102,6 @@ static void __init efi_arch_relocate_image(unsigned long
> delta)
> }
> }
>
> -extern const s32 __trampoline_rel_start[], __trampoline_rel_stop[];
> -extern const s32 __trampoline_seg_start[], __trampoline_seg_stop[];
I'd prefer if these stayed here, leaving the 4 symbols as minimally exposed as
possible. Recall that efi-boot.h isn't really a header in that sense, but
rather a .c file. Elsewhere we keep decls in .c files when they're used in just
one CU.
Jan
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