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x86/msi: Fix compile error caused by CONFIG_GENERIC_MSI_IRQ=y && !CONFIG_X86_LOCAL_APIC 

When compiling the x86 kernel, if X86_LOCAL_APIC is not enabled but
GENERIC_MSI_IRQ is selected in '.config', the following compilation
error will occur:

  include/linux/gpio/driver.h:38:19: error:
    field 'msiinfo' has incomplete type

  kernel/irq/msi.c:752:5: error: invalid use of incomplete typedef
    'msi_alloc_info_t' {aka 'struct irq_alloc_info'}

  kernel/irq/msi.c:740:1: error: control reaches end of non-void function

This is because file such as 'kernel/irq/msi.c' only depends on
'GENERIC_MSI_IRQ', and uses 'struct msi_alloc_info_t'. However,
this struct depends on 'X86_LOCAL_APIC'.

When enable 'GENERIC_MSI_IRQ' or 'X86_LOCAL_APIC' will select
'IRQ_DOMAIN_HIERARCHY', so exposing this struct using
'IRQ_DOMAIN_HIERARCHY' rather than 'X86_LOCAL_APIC'.

Under the above conditions, if 'HPET_TIMER' is selected, the following
compilation error will occur:

  arch/x86/kernel/hpet.c:550:13: error: ‘x86_vector_domain’ undeclared

  arch/x86/kernel/hpet.c:600:9: error: implicit declaration of
    function ‘init_irq_alloc_info’

This is because 'x86_vector_domain' is defined in 'kernel/apic/vector.c'
which is compiled only when 'X86_LOCAL_APIC' is enabled. Besides,
function 'msi_domain_set_affinity' is defined in 'include/linux/msi.h'
which depends on 'GENERIC_MSI_IRQ'. So use 'X86_LOCAL_APIC' and
'GENERIC_MSI_IRQ' to expose these code.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Lu Yao <yaolu@kylinos.cn>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Tested-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: https://lore.kernel.org/r/20231012032659.323251-1-yaolu@kylinos.cn
This commit is contained in:
Lu Yao 2023-10-12 11:26:59 +08:00 committed by Ingo Molnar
parent 57baabe365
commit 441ccc3512
2 changed files with 5 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

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

@ -28,7 +28,7 @@
#include <asm/irq.h>
#include <asm/sections.h>
#ifdef CONFIG_X86_LOCAL_APIC
#ifdef CONFIG_IRQ_DOMAIN_HIERARCHY
struct irq_data;
struct pci_dev;
struct msi_desc;
@ -105,10 +105,10 @@ static inline void irq_complete_move(struct irq_cfg *c) { }
#endif
extern void apic_ack_edge(struct irq_data *data);
#else /* CONFIG_X86_LOCAL_APIC */
#else /* CONFIG_IRQ_DOMAIN_HIERARCHY */
static inline void lock_vector_lock(void) {}
static inline void unlock_vector_lock(void) {}
#endif /* CONFIG_X86_LOCAL_APIC */
#endif /* CONFIG_IRQ_DOMAIN_HIERARCHY */
/* Statistics */
extern atomic_t irq_err_count;

4
arch/x86/kernel/hpet.c
View File

@ -52,7 +52,7 @@ unsigned long hpet_address;
u8 hpet_blockid; /* OS timer block num */
bool hpet_msi_disable;
#ifdef CONFIG_GENERIC_MSI_IRQ
#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_GENERIC_MSI_IRQ)
static DEFINE_PER_CPU(struct hpet_channel *, cpu_hpet_channel);
static struct irq_domain *hpet_domain;
#endif
@ -469,7 +469,7 @@ static void __init hpet_legacy_clockevent_register(struct hpet_channel *hc)
/*
* HPET MSI Support
*/
#ifdef CONFIG_GENERIC_MSI_IRQ
#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_GENERIC_MSI_IRQ)
static void hpet_msi_unmask(struct irq_data *data)
{
struct hpet_channel *hc = irq_data_get_irq_handler_data(data);