kpriv/linux-hardened
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

x86: x2apic, IR: Clean up X86_X2APIC and INTR_REMAP config checks

Browse source 
Add x2apic_supported() to clean up CONFIG_X86_X2APIC checks.

Fix CONFIG_INTR_REMAP checks.

[ Impact: cleanup ]

Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: dwmw2@infradead.org
Cc: Suresh Siddha <suresh.b.siddha@intel.com>
Cc: Weidong Han <weidong.han@intel.com>
LKML-Reference: <20090420200450.128993000@linux-os.sc.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Suresh Siddha 2009-04-20 13:02:27 -07:00 committed by Ingo Molnar
parent 667c5296cc
commit fc1edaf9e7
7 changed files with 21 additions and 48 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

10
arch/x86/include/asm/apic.h
View file

@ -107,8 +107,7 @@ extern u32 native_safe_apic_wait_icr_idle(void);
extern void native_apic_icr_write(u32 low, u32 id);
extern u64 native_apic_icr_read(void);
#define EIM_8BIT_APIC_ID 0
#define EIM_32BIT_APIC_ID 1
extern int x2apic_mode;
#ifdef CONFIG_X86_X2APIC
/*
@ -166,7 +165,7 @@ static inline u64 native_x2apic_icr_read(void)
return val;
}
extern int x2apic, x2apic_phys;
extern int x2apic_phys;
extern void check_x2apic(void);
extern void enable_x2apic(void);
extern void x2apic_icr_write(u32 low, u32 id);
@ -182,6 +181,8 @@ static inline int x2apic_enabled(void)
return 1;
return 0;
}
#define x2apic_supported() (cpu_has_x2apic)
#else
static inline void check_x2apic(void)
{
@ -194,9 +195,8 @@ static inline int x2apic_enabled(void)
return 0;
}
#define x2apic 0
#define x2apic_preenabled 0
#define x2apic_supported() 0
#endif
extern void enable_IR_x2apic(void);

2
arch/x86/include/asm/io_apic.h
View file

@ -161,7 +161,6 @@ extern int io_apic_set_pci_routing(int ioapic, int pin, int irq,
extern int (*ioapic_renumber_irq)(int ioapic, int irq);
extern void ioapic_init_mappings(void);
#ifdef CONFIG_X86_64
extern struct IO_APIC_route_entry **alloc_ioapic_entries(void);
extern void free_ioapic_entries(struct IO_APIC_route_entry **ioapic_entries);
extern int save_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
@ -169,7 +168,6 @@ extern void mask_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
extern int restore_IO_APIC_setup(struct IO_APIC_route_entry **ioapic_entries);
extern void reinit_intr_remapped_IO_APIC(int intr_remapping,
struct IO_APIC_route_entry **ioapic_entries);
#endif
extern void probe_nr_irqs_gsi(void);

2
arch/x86/include/asm/irq_remapping.h
View file

@ -1,6 +1,6 @@
#ifndef _ASM_X86_IRQ_REMAPPING_H
#define _ASM_X86_IRQ_REMAPPING_H
#define IRTE_DEST(dest) ((x2apic) ? dest : dest << 8)
#define IRTE_DEST(dest) ((x2apic_mode) ? dest : dest << 8)
#endif /* _ASM_X86_IRQ_REMAPPING_H */

49
arch/x86/kernel/apic/apic.c
View file

@ -134,8 +134,8 @@ static __init int setup_apicpmtimer(char *s)
__setup("apicpmtimer", setup_apicpmtimer);
#endif
int x2apic_mode;
#ifdef CONFIG_X86_X2APIC
int x2apic;
/* x2apic enabled before OS handover */
static int x2apic_preenabled;
static int disable_x2apic;
@ -858,7 +858,7 @@ void clear_local_APIC(void)
u32 v;
/* APIC hasn't been mapped yet */
if (!x2apic && !apic_phys)
if (!x2apic_mode && !apic_phys)
return;
maxlvt = lapic_get_maxlvt();
@ -1330,7 +1330,7 @@ void check_x2apic(void)
{
if (x2apic_enabled()) {
pr_info("x2apic enabled by BIOS, switching to x2apic ops\n");
x2apic_preenabled = x2apic = 1;
x2apic_preenabled = x2apic_mode = 1;
}
}
@ -1338,7 +1338,7 @@ void enable_x2apic(void)
{
int msr, msr2;
if (!x2apic)
if (!x2apic_mode)
return;
rdmsr(MSR_IA32_APICBASE, msr, msr2);
@ -1390,25 +1390,17 @@ void __init enable_IR_x2apic(void)
mask_IO_APIC_setup(ioapic_entries);
mask_8259A();
#ifdef CONFIG_X86_X2APIC
if (cpu_has_x2apic)
ret = enable_intr_remapping(EIM_32BIT_APIC_ID);
else
#endif
ret = enable_intr_remapping(EIM_8BIT_APIC_ID);
ret = enable_intr_remapping(x2apic_supported());
if (ret)
goto end_restore;
pr_info("Enabled Interrupt-remapping\n");
#ifdef CONFIG_X86_X2APIC
if (cpu_has_x2apic && !x2apic) {
x2apic = 1;
if (x2apic_supported() && !x2apic_mode) {
x2apic_mode = 1;
enable_x2apic();
pr_info("Enabled x2apic\n");
}
#endif
end_restore:
if (ret)
@ -1576,7 +1568,7 @@ void __init early_init_lapic_mapping(void)
*/
void __init init_apic_mappings(void)
{
if (x2apic) {
if (x2apic_mode) {
boot_cpu_physical_apicid = read_apic_id();
return;
}
@ -2010,10 +2002,10 @@ static int lapic_suspend(struct sys_device *dev, pm_message_t state)
local_irq_save(flags);
disable_local_APIC();
#ifdef CONFIG_INTR_REMAP
if (intr_remapping_enabled)
disable_intr_remapping();
#endif
local_irq_restore(flags);
return 0;
}
@ -2023,8 +2015,6 @@ static int lapic_resume(struct sys_device *dev)
unsigned int l, h;
unsigned long flags;
int maxlvt;
#ifdef CONFIG_INTR_REMAP
int ret;
struct IO_APIC_route_entry **ioapic_entries = NULL;
@ -2050,17 +2040,8 @@ static int lapic_resume(struct sys_device *dev)
mask_8259A();
}
if (x2apic)
if (x2apic_mode)
enable_x2apic();
#else
if (!apic_pm_state.active)
return 0;
local_irq_save(flags);
if (x2apic)
enable_x2apic();
#endif
else {
/*
* Make sure the APICBASE points to the right address
@ -2098,18 +2079,12 @@ static int lapic_resume(struct sys_device *dev)
apic_write(APIC_ESR, 0);
apic_read(APIC_ESR);
#ifdef CONFIG_INTR_REMAP
if (intr_remapping_enabled) {
if (x2apic)
reenable_intr_remapping(EIM_32BIT_APIC_ID);
else
reenable_intr_remapping(EIM_8BIT_APIC_ID);
reenable_intr_remapping(x2apic_mode);
unmask_8259A();
restore_IO_APIC_setup(ioapic_entries);
free_ioapic_entries(ioapic_entries);
}
#endif
local_irq_restore(flags);

2
arch/x86/kernel/apic/io_apic.c
View file

@ -736,7 +736,6 @@ static int __init ioapic_pirq_setup(char *str)
__setup("pirq=", ioapic_pirq_setup);
#endif /* CONFIG_X86_32 */
#ifdef CONFIG_INTR_REMAP
struct IO_APIC_route_entry **alloc_ioapic_entries(void)
{
int apic;
@ -857,7 +856,6 @@ void free_ioapic_entries(struct IO_APIC_route_entry **ioapic_entries)
kfree(ioapic_entries);
}
#endif
/*
* Find the IRQ entry number of a certain pin.

2
arch/x86/kernel/apic/probe_64.c
View file

@ -50,7 +50,7 @@ static struct apic *apic_probe[] __initdata = {
void __init default_setup_apic_routing(void)
{
#ifdef CONFIG_X86_X2APIC
if (x2apic && (apic != &apic_x2apic_phys &&
if (x2apic_mode && (apic != &apic_x2apic_phys &&
#ifdef CONFIG_X86_UV
apic != &apic_x2apic_uv_x &&
#endif

2
include/linux/dmar.h
View file

@ -158,6 +158,8 @@ static inline struct intel_iommu *map_ioapic_to_ir(int apic)
}
#define irq_remapped(irq) (0)
#define enable_intr_remapping(mode) (-1)
#define disable_intr_remapping() (0)
#define reenable_intr_remapping(mode) (0)
#define intr_remapping_enabled (0)
#endif