Commit bcdd4873 authored by Isaku Yamahata's avatar Isaku Yamahata Committed by Tony Luck
Browse files

ia64/pv_ops/xen: implement xen pv_iosapic_ops. 



implement xen pv_iosapic_ops for xen paravirtualized
iosapic.

Signed-off-by: default avatarIsaku Yamahata <yamahata@valinux.co.jp>
Signed-off-by: default avatarTony Luck <tony.luck@intel.com>
parent 16583bc0

arch/ia64/xen/xen_pv_ops.c

+52 −0
Original line number Diff line number Diff line
@@ -291,6 +291,57 @@ const struct pv_cpu_asm_switch xen_cpu_asm_switch = { 
	.leave_kernel		= (unsigned long)&xen_leave_kernel,

};



/***************************************************************************

 * pv_iosapic_ops

 * iosapic read/write hooks.

 */

static void

xen_pcat_compat_init(void)

{

	/* nothing */

}



static struct irq_chip*

xen_iosapic_get_irq_chip(unsigned long trigger)

{

	return NULL;

}



static unsigned int

xen_iosapic_read(char __iomem *iosapic, unsigned int reg)

{

	struct physdev_apic apic_op;

	int ret;



	apic_op.apic_physbase = (unsigned long)iosapic -

					__IA64_UNCACHED_OFFSET;

	apic_op.reg = reg;

	ret = HYPERVISOR_physdev_op(PHYSDEVOP_apic_read, &apic_op);

	if (ret)

		return ret;

	return apic_op.value;

}



static void

xen_iosapic_write(char __iomem *iosapic, unsigned int reg, u32 val)

{

	struct physdev_apic apic_op;



	apic_op.apic_physbase = (unsigned long)iosapic -

					__IA64_UNCACHED_OFFSET;

	apic_op.reg = reg;

	apic_op.value = val;

	HYPERVISOR_physdev_op(PHYSDEVOP_apic_write, &apic_op);

}



static const struct pv_iosapic_ops xen_iosapic_ops __initdata = {

	.pcat_compat_init = xen_pcat_compat_init,

	.__get_irq_chip = xen_iosapic_get_irq_chip,



	.__read = xen_iosapic_read,

	.__write = xen_iosapic_write,

};



/***************************************************************************

 * pv_ops initialization

 */
@@ -302,6 +353,7 @@ xen_setup_pv_ops(void) 
	pv_info = xen_info;

	pv_init_ops = xen_init_ops;

	pv_cpu_ops = xen_cpu_ops;

	pv_iosapic_ops = xen_iosapic_ops;



	paravirt_cpu_asm_init(&xen_cpu_asm_switch);

}