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Re: [PATCH v2] x86/irq: introduce APIC_VECTOR_VALID()
- To: dmkhn@xxxxxxxxx
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 24 Mar 2025 13:36:35 +0100
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- Cc: andrew.cooper3@xxxxxxxxxx, anthony.perard@xxxxxxxxxx, julien@xxxxxxx, michal.orzel@xxxxxxx, roger.pau@xxxxxxxxxx, sstabellini@xxxxxxxxxx, dmukhin@xxxxxxxx, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Mon, 24 Mar 2025 12:36:43 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 21.03.2025 00:05, dmkhn@xxxxxxxxx wrote:
> Add new macro APIC_VECTOR_VALID() to validate the interrupt vector
> range as per [1]. This macro replaces hardcoded checks against the
> open-coded value 16 in LAPIC and virtual LAPIC code and simplifies
> the code a bit.
>
> [1] Intel SDM volume 3A
> Chapter "ADVANCED PROGRAMMABLE INTERRUPT CONTROLLER"
> Section "Valid Interrupt Vectors"
>
> Signed-off-by: Denis Mukhin <dmukhin@xxxxxxxx>
Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx>
with ...
> --- a/xen/arch/x86/include/asm/apicdef.h
> +++ b/xen/arch/x86/include/asm/apicdef.h
> @@ -78,6 +78,7 @@
> #define APIC_DM_STARTUP 0x00600
> #define APIC_DM_EXTINT 0x00700
> #define APIC_VECTOR_MASK 0x000FF
> +#define APIC_VECTOR_VALID(x) (((x) &
> APIC_VECTOR_MASK) >= 16)
... line length restrictions respected here. I'll see about taking care of
this while committing, provided other x86 maintainers wouldn't prefer this
to not go in in the first place (so I'll also give it another day or two).
Jan
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