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x86/init: Add intr_mode_init to x86_init_ops

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X86 and XEN initialize interrupt delivery mode in different way.

To avoid conditionals, add a new x86_init_ops function which defaults to
the standard function and can be overridden by the early XEN platform code.

[ tglx: Folded the XEN part which was a separate patch to preserve
  	bisectability ]

Signed-off-by: Dou Liyang <douly.fnst@cn.fujitsu.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: yinghai@kernel.org
Cc: bhe@redhat.com
Link: https://lkml.kernel.org/r/1505293975-26005-10-git-send-email-douly.fnst@cn.fujitsu.com
This commit is contained in:
Dou Liyang 2017-09-13 17:12:52 +08:00 committed by Thomas Gleixner
parent ca7c6076ba
commit 34fba3e6b1
5 changed files with 6 additions and 2 deletions
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2
arch/x86/include/asm/x86_init.h
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@ -50,11 +50,13 @@ struct x86_init_resources {
* are set up.
* @intr_init: interrupt init code
* @trap_init: platform specific trap setup
* @intr_mode_init: interrupt delivery mode setup
*/
struct x86_init_irqs {
void (*pre_vector_init)(void);
void (*intr_init)(void);
void (*trap_init)(void);
void (*intr_mode_init)(void);
};
/**

2
arch/x86/kernel/apic/apic.c
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@ -2423,7 +2423,7 @@ void __init apic_bsp_setup(bool upmode)
#ifdef CONFIG_UP_LATE_INIT
void __init up_late_init(void)
{
apic_intr_mode_init();
x86_init.irqs.intr_mode_init();
if (apic_intr_mode == APIC_PIC)
return;

2
arch/x86/kernel/smpboot.c
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@ -1296,7 +1296,7 @@ void __init native_smp_prepare_cpus(unsigned int max_cpus)
set_cpu_sibling_map(0);
apic_intr_mode_init();
x86_init.irqs.intr_mode_init();
smp_sanity_check();

1
arch/x86/kernel/x86_init.c
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@ -55,6 +55,7 @@ struct x86_init_ops x86_init __initdata = {
.pre_vector_init = init_ISA_irqs,
.intr_init = native_init_IRQ,
.trap_init = x86_init_noop,
.intr_mode_init = apic_intr_mode_init
},
.oem = {

1
arch/x86/xen/enlighten_pv.c
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@ -1230,6 +1230,7 @@ asmlinkage __visible void __init xen_start_kernel(void)
x86_platform.get_nmi_reason = xen_get_nmi_reason;
x86_init.resources.memory_setup = xen_memory_setup;
x86_init.irqs.intr_mode_init = x86_init_noop;
x86_init.oem.arch_setup = xen_arch_setup;
x86_init.oem.banner = xen_banner;