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[PATCH] i386: Allow to use GENERICARCH for UP kernels

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There are some machines around (large xSeries or Unisys ES7000) that
need physical IO-APIC destination mode to access all of their IO
devices. This currently doesn't work in UP kernels as used in
distribution installers.

This patch allows to compile even UP kernels as GENERICARCH which
allows to use physical or clustered APIC mode.

Signed-off-by: Andi Kleen <[email protected]>
This commit is contained in:
Andi Kleen 2006-09-26 10:52:26 +02:00 • committed by Andi Kleen
commit 874c4fe389
11 changed files with 76 additions and 41 deletions
Download patch file Download diff file Expand all files Collapse all files

69
include/asm-i386/genapic.h
View file

@ -1,6 +1,8 @@
#ifndef _ASM_GENAPIC_H
#define _ASM_GENAPIC_H 1
#include <asm/mpspec.h>
/*
* Generic APIC driver interface.
*
@ -63,14 +65,25 @@ struct genapic {
unsigned (*get_apic_id)(unsigned long x);
unsigned long apic_id_mask;
unsigned int (*cpu_mask_to_apicid)(cpumask_t cpumask);
#ifdef CONFIG_SMP
/* ipi */
void (*send_IPI_mask)(cpumask_t mask, int vector);
void (*send_IPI_allbutself)(int vector);
void (*send_IPI_all)(int vector);
#endif
};
#define APICFUNC(x) .x = x
#define APICFUNC(x) .x = x,
/* More functions could be probably marked IPIFUNC and save some space
in UP GENERICARCH kernels, but I don't have the nerve right now
to untangle this mess. -AK */
#ifdef CONFIG_SMP
#define IPIFUNC(x) APICFUNC(x)
#else
#define IPIFUNC(x)
#endif
#define APIC_INIT(aname, aprobe) { \
.name = aname, \
@ -80,33 +93,33 @@ struct genapic {
.no_balance_irq = NO_BALANCE_IRQ, \
.ESR_DISABLE = esr_disable, \
.apic_destination_logical = APIC_DEST_LOGICAL, \
APICFUNC(apic_id_registered), \
APICFUNC(target_cpus), \
APICFUNC(check_apicid_used), \
APICFUNC(check_apicid_present), \
APICFUNC(init_apic_ldr), \
APICFUNC(ioapic_phys_id_map), \
APICFUNC(clustered_apic_check), \
APICFUNC(multi_timer_check), \
APICFUNC(apicid_to_node), \
APICFUNC(cpu_to_logical_apicid), \
APICFUNC(cpu_present_to_apicid), \
APICFUNC(apicid_to_cpu_present), \
APICFUNC(mpc_apic_id), \
APICFUNC(setup_portio_remap), \
APICFUNC(check_phys_apicid_present), \
APICFUNC(mpc_oem_bus_info), \
APICFUNC(mpc_oem_pci_bus), \
APICFUNC(mps_oem_check), \
APICFUNC(get_apic_id), \
APICFUNC(apic_id_registered) \
APICFUNC(target_cpus) \
APICFUNC(check_apicid_used) \
APICFUNC(check_apicid_present) \
APICFUNC(init_apic_ldr) \
APICFUNC(ioapic_phys_id_map) \
APICFUNC(clustered_apic_check) \
APICFUNC(multi_timer_check) \
APICFUNC(apicid_to_node) \
APICFUNC(cpu_to_logical_apicid) \
APICFUNC(cpu_present_to_apicid) \
APICFUNC(apicid_to_cpu_present) \
APICFUNC(mpc_apic_id) \
APICFUNC(setup_portio_remap) \
APICFUNC(check_phys_apicid_present) \
APICFUNC(mpc_oem_bus_info) \
APICFUNC(mpc_oem_pci_bus) \
APICFUNC(mps_oem_check) \
APICFUNC(get_apic_id) \
.apic_id_mask = APIC_ID_MASK, \
APICFUNC(cpu_mask_to_apicid), \
APICFUNC(acpi_madt_oem_check), \
APICFUNC(send_IPI_mask), \
APICFUNC(send_IPI_allbutself), \
APICFUNC(send_IPI_all), \
APICFUNC(enable_apic_mode), \
APICFUNC(phys_pkg_id), \
APICFUNC(cpu_mask_to_apicid) \
APICFUNC(acpi_madt_oem_check) \
IPIFUNC(send_IPI_mask) \
IPIFUNC(send_IPI_allbutself) \
IPIFUNC(send_IPI_all) \
APICFUNC(enable_apic_mode) \
APICFUNC(phys_pkg_id) \
}
extern struct genapic *genapic;

4
include/asm-i386/mach-es7000/mach_apic.h
View file

@ -123,9 +123,13 @@ extern u8 cpu_2_logical_apicid[];
/* Mapping from cpu number to logical apicid */
static inline int cpu_to_logical_apicid(int cpu)
{
#ifdef CONFIG_SMP
if (cpu >= NR_CPUS)
return BAD_APICID;
return (int)cpu_2_logical_apicid[cpu];
#else
return logical_smp_processor_id();
#endif
}
static inline int mpc_apic_id(struct mpc_config_processor *m, struct mpc_config_translation *unused)

11
include/asm-i386/mach-summit/mach_apic.h
View file

@ -46,10 +46,12 @@ extern u8 cpu_2_logical_apicid[];
static inline void init_apic_ldr(void)
{
unsigned long val, id;
int i, count;
u8 lid;
int count = 0;
u8 my_id = (u8)hard_smp_processor_id();
u8 my_cluster = (u8)apicid_cluster(my_id);
#ifdef CONFIG_SMP
u8 lid;
int i;
/* Create logical APIC IDs by counting CPUs already in cluster. */
for (count = 0, i = NR_CPUS; --i >= 0; ) {
@ -57,6 +59,7 @@ static inline void init_apic_ldr(void)
if (lid != BAD_APICID && apicid_cluster(lid) == my_cluster)
++count;
}
#endif
/* We only have a 4 wide bitmap in cluster mode. If a deranged
* BIOS puts 5 CPUs in one APIC cluster, we're hosed. */
BUG_ON(count >= XAPIC_DEST_CPUS_SHIFT);
@ -91,9 +94,13 @@ static inline int apicid_to_node(int logical_apicid)
/* Mapping from cpu number to logical apicid */
static inline int cpu_to_logical_apicid(int cpu)
{
#ifdef CONFIG_SMP
if (cpu >= NR_CPUS)
return BAD_APICID;
return (int)cpu_2_logical_apicid[cpu];
#else
return logical_smp_processor_id();
#endif
}
static inline int cpu_present_to_apicid(int mps_cpu)

19
include/asm-i386/smp.h
View file

@ -80,17 +80,11 @@ static inline int hard_smp_processor_id(void)
return GET_APIC_ID(*(unsigned long *)(APIC_BASE+APIC_ID));
}
#endif
static __inline int logical_smp_processor_id(void)
{
/* we don't want to mark this access volatile - bad code generation */
return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
}
#endif
extern int __cpu_disable(void);
extern void __cpu_die(unsigned int cpu);
#endif /* !__ASSEMBLY__ */
#else /* CONFIG_SMP */
@ -100,4 +94,15 @@ extern void __cpu_die(unsigned int cpu);
#define NO_PROC_ID 0xFF /* No processor magic marker */
#endif
#ifndef __ASSEMBLY__
#ifdef CONFIG_X86_LOCAL_APIC
static __inline int logical_smp_processor_id(void)
{
/* we don't want to mark this access volatile - bad code generation */
return GET_APIC_LOGICAL_ID(*(unsigned long *)(APIC_BASE+APIC_LDR));
}
#endif
#endif
#endif