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[IA64] pvops: paravirtualize NR_IRQS
Make NR_IRQ overridable by each pv instances. Pv instance may need each own number of irqs so that NR_IRQS should be the maximum number of nr_irqs each pv instances need. Cc: Jes Sorensen <jes@sgi.com> Signed-off-by: Isaku Yamahata <yamahata@valinux.co.jp> Signed-off-by: Tony Luck <tony.luck@intel.com>
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Isaku Yamahata
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Tony Luck
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May 27, 2008
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/* | ||
* calculate | ||
* NR_IRQS = max(IA64_NATIVE_NR_IRQS, XEN_NR_IRQS, FOO_NR_IRQS...) | ||
* depending on config. | ||
* This must be calculated before processing asm-offset.c. | ||
*/ | ||
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#define ASM_OFFSETS_C 1 | ||
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#include <linux/kbuild.h> | ||
#include <linux/threads.h> | ||
#include <asm-ia64/native/irq.h> | ||
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void foo(void) | ||
{ | ||
union paravirt_nr_irqs_max { | ||
char ia64_native_nr_irqs[IA64_NATIVE_NR_IRQS]; | ||
#ifdef CONFIG_XEN | ||
char xen_nr_irqs[XEN_NR_IRQS]; | ||
#endif | ||
}; | ||
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DEFINE(NR_IRQS, sizeof (union paravirt_nr_irqs_max)); | ||
} |
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/****************************************************************************** | ||
* include/asm-ia64/native/irq.h | ||
* | ||
* Copyright (c) 2008 Isaku Yamahata <yamahata at valinux co jp> | ||
* VA Linux Systems Japan K.K. | ||
* | ||
* This program is free software; you can redistribute it and/or modify | ||
* it under the terms of the GNU General Public License as published by | ||
* the Free Software Foundation; either version 2 of the License, or | ||
* (at your option) any later version. | ||
* | ||
* This program is distributed in the hope that it will be useful, | ||
* but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
* GNU General Public License for more details. | ||
* | ||
* You should have received a copy of the GNU General Public License | ||
* along with this program; if not, write to the Free Software | ||
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | ||
* | ||
* moved from linux/include/asm-ia64/irq.h. | ||
*/ | ||
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#ifndef _ASM_IA64_NATIVE_IRQ_H | ||
#define _ASM_IA64_NATIVE_IRQ_H | ||
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#define NR_VECTORS 256 | ||
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#if (NR_VECTORS + 32 * NR_CPUS) < 1024 | ||
#define IA64_NATIVE_NR_IRQS (NR_VECTORS + 32 * NR_CPUS) | ||
#else | ||
#define IA64_NATIVE_NR_IRQS 1024 | ||
#endif | ||
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#endif /* _ASM_IA64_NATIVE_IRQ_H */ |