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Re: [PATCH] x86: Add Kconfig option to require NX bit support
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Alejandro Vallejo <alejandro.vallejo@xxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 2 Jun 2023 15:02:43 +0200
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- Cc: Roger Pau Monné <roger.pau@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Fri, 02 Jun 2023 13:03:07 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 02.06.2023 14:05, Andrew Cooper wrote:
> On 01/06/2023 6:43 pm, Alejandro Vallejo wrote:
>> @@ -151,6 +152,11 @@ not_multiboot:
>> .Lnot_aligned:
>> add $sym_offs(.Lbag_alg_msg),%esi # Error message
>> jmp .Lget_vtb
>> +#if IS_ENABLED(CONFIG_REQUIRE_NX_BIT)
>
> This doesn't need to be IS_ENABLED(). #if will DTRT for a non-existent
> symbol by considering such to be 0.
And then it really should be #ifdef, not #if (like for all "real" Kconfig
symbols).
Jan
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