implement xen pv_iosapic_ops for xen paravirtualized iosapic. Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx> --- arch/ia64/xen/xen_pv_ops.c | 52 ++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 52 insertions(+), 0 deletions(-) diff --git a/arch/ia64/xen/xen_pv_ops.c b/arch/ia64/xen/xen_pv_ops.c index e483d47..97c882a 100644 --- a/arch/ia64/xen/xen_pv_ops.c +++ b/arch/ia64/xen/xen_pv_ops.c @@ -290,6 +290,57 @@ const struct pv_cpu_asm_switch xen_cpu_asm_switch = { }; /*************************************************************************** + * 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 */ @@ -300,6 +351,7 @@ 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); } -- 1.5.3 -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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