From bcdd48739d1336332e4086c9e1c9f225290b8194 Mon Sep 17 00:00:00 2001 From: Isaku Yamahata Date: Fri, 17 Oct 2008 11:18:05 +0900 Subject: [PATCH] ia64/pv_ops/xen: implement xen pv_iosapic_ops. implement xen pv_iosapic_ops for xen paravirtualized iosapic. Signed-off-by: Isaku Yamahata Signed-off-by: Tony Luck --- arch/ia64/xen/xen_pv_ops.c | 52 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/arch/ia64/xen/xen_pv_ops.c b/arch/ia64/xen/xen_pv_ops.c index 5b23cd5e915..41a6cbfab15 100644 --- a/arch/ia64/xen/xen_pv_ops.c +++ b/arch/ia64/xen/xen_pv_ops.c @@ -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); } -- 2.41.1