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x86/apic: Rename variables and functions related to x86_io_apic_ops

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The names of x86_io_apic_ops and its two member variables are
misleading:

The ->read() member is to read IO_APIC reg, while ->disable()
which is called by native_disable_io_apic()/irq_remapping_disable_io_apic()
is actually used to restore boot IRQ mode, not to disable the IO-APIC.

So rename x86_io_apic_ops to 'x86_apic_ops' since it doesn't only
handle the IO-APIC, but also the local APIC.

Also rename its member variables and the related callbacks.

Signed-off-by: Baoquan He <bhe@redhat.com>
Reviewed-by: Eric W. Biederman <ebiederm@xmission.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: douly.fnst@cn.fujitsu.com
Cc: joro@8bytes.org
Cc: prarit@redhat.com
Cc: uobergfe@redhat.com
Link: http://lkml.kernel.org/r/20180214054656.3780-6-bhe@redhat.com
[ Rewrote the changelog. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Baoquan He 2018-02-14 13:46:55 +08:00 committed by Ingo Molnar
parent 50374b96d2
commit 51b146c572
6 changed files with 15 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
arch/x86/include/asm/io_apic.h
View File

@ -183,11 +183,11 @@ extern void disable_ioapic_support(void);
extern void __init io_apic_init_mappings(void);
extern unsigned int native_io_apic_read(unsigned int apic, unsigned int reg);
extern void native_disable_io_apic(void);
extern void native_restore_boot_irq_mode(void);
static inline unsigned int io_apic_read(unsigned int apic, unsigned int reg)
{
return x86_io_apic_ops.read(apic, reg);
return x86_apic_ops.io_apic_read(apic, reg);
}
extern void setup_IO_APIC(void);
@ -229,7 +229,7 @@ static inline void mp_save_irq(struct mpc_intsrc *m) { }
static inline void disable_ioapic_support(void) { }
static inline void io_apic_init_mappings(void) { }
#define native_io_apic_read NULL
#define native_disable_io_apic NULL
#define native_restore_boot_irq_mode NULL
static inline void setup_IO_APIC(void) { }
static inline void enable_IO_APIC(void) { }

8
arch/x86/include/asm/x86_init.h
View File

@ -274,16 +274,16 @@ struct x86_msi_ops {
void (*restore_msi_irqs)(struct pci_dev *dev);
};
struct x86_io_apic_ops {
unsigned int (*read) (unsigned int apic, unsigned int reg);
void (*disable)(void);
struct x86_apic_ops {
unsigned int (*io_apic_read) (unsigned int apic, unsigned int reg);
void (*restore)(void);
};
extern struct x86_init_ops x86_init;
extern struct x86_cpuinit_ops x86_cpuinit;
extern struct x86_platform_ops x86_platform;
extern struct x86_msi_ops x86_msi;
extern struct x86_io_apic_ops x86_io_apic_ops;
extern struct x86_apic_ops x86_apic_ops;
extern void x86_early_init_platform_quirks(void);
extern void x86_init_noop(void);

4
arch/x86/kernel/apic/io_apic.c
View File

@ -1410,7 +1410,7 @@ void __init enable_IO_APIC(void)
clear_IO_APIC();
}
void native_disable_io_apic(void)
void native_restore_boot_irq_mode(void)
{
/*
* If the i8259 is routed through an IOAPIC
@ -1443,7 +1443,7 @@ void restore_boot_irq_mode(void)
if (!nr_legacy_irqs())
return;
x86_io_apic_ops.disable();
x86_apic_ops.restore();
}
#ifdef CONFIG_X86_32

6
arch/x86/kernel/x86_init.c
View File

@ -146,7 +146,7 @@ void arch_restore_msi_irqs(struct pci_dev *dev)
}
#endif
struct x86_io_apic_ops x86_io_apic_ops __ro_after_init = {
.read = native_io_apic_read,
.disable = native_disable_io_apic,
struct x86_apic_ops x86_apic_ops __ro_after_init = {
.io_apic_read = native_io_apic_read,
.restore = native_restore_boot_irq_mode,
};

2
arch/x86/xen/apic.c
View File

@ -215,7 +215,7 @@ static void __init xen_apic_check(void)
}
void __init xen_init_apic(void)
{
x86_io_apic_ops.read = xen_io_apic_read;
x86_apic_ops.io_apic_read = xen_io_apic_read;
/* On PV guests the APIC CPUID bit is disabled so none of the
* routines end up executing. */
if (!xen_initial_domain())

4
drivers/iommu/irq_remapping.c
View File

@ -27,7 +27,7 @@ int disable_irq_post = 0;
static int disable_irq_remap;
static struct irq_remap_ops *remap_ops;
static void irq_remapping_disable_io_apic(void)
static void irq_remapping_restore_boot_irq_mode(void)
{
/*
* With interrupt-remapping, for now we will use virtual wire A
@ -42,7 +42,7 @@ static void irq_remapping_disable_io_apic(void)
static void __init irq_remapping_modify_x86_ops(void)
{
x86_io_apic_ops.disable = irq_remapping_disable_io_apic;
x86_apic_ops.restore = irq_remapping_restore_boot_irq_mode;
}
static __init int setup_nointremap(char *str)