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[Xen-devel] Re: [RFC PATCH 16/35] subarch support for interrupt and exce

To: virtualization@xxxxxxxxxxxxxx
Subject: [Xen-devel] Re: [RFC PATCH 16/35] subarch support for interrupt and exception gates
From: Andi Kleen <ak@xxxxxxx>
Date: Tue, 9 May 2006 13:09:49 +0200
Cc: Chris Wright <chrisw@xxxxxxxxxxxx>, Ian Pratt <ian.pratt@xxxxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx
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> +/*
> + * This needs to use 'idt_table' rather than 'idt', and
> + * thus use the _nonmapped_ version of the IDT, as the
> + * Pentium F0 0F bugfix can have resulted in the mapped
> + * IDT being write-protected.
> + */
> +void set_intr_gate(unsigned int n, void *addr)
> +{
> +     _set_gate(idt_table+n,14,0,addr,__KERNEL_CS);
> +}

No need to duplicate the various set_*_gate functions into the subarchs.

> +static void __init set_task_gate(unsigned int n, unsigned int gdt_entry)
> +{
> +     /* _set_gate(n, 5, 0, 0, (gdt_entry<<3)); */
> +}

Looks weird, but can be handled in the low level function.


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