diff options
Diffstat (limited to 'linux-2.6-xen-sparse/arch/x86_64/kernel/genapic-xen.c')
| -rw-r--r-- | linux-2.6-xen-sparse/arch/x86_64/kernel/genapic-xen.c | 143 |
1 files changed, 0 insertions, 143 deletions
diff --git a/linux-2.6-xen-sparse/arch/x86_64/kernel/genapic-xen.c b/linux-2.6-xen-sparse/arch/x86_64/kernel/genapic-xen.c deleted file mode 100644 index c04ae589b0..0000000000 --- a/linux-2.6-xen-sparse/arch/x86_64/kernel/genapic-xen.c +++ /dev/null @@ -1,143 +0,0 @@ -/* - * Copyright 2004 James Cleverdon, IBM. - * Subject to the GNU Public License, v.2 - * - * Generic APIC sub-arch probe layer. - * - * Hacked for x86-64 by James Cleverdon from i386 architecture code by - * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and - * James Cleverdon. - */ -#include <linux/threads.h> -#include <linux/cpumask.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/ctype.h> -#include <linux/init.h> -#include <linux/module.h> - -#include <asm/smp.h> -#include <asm/ipi.h> - -#if defined(CONFIG_ACPI) -#include <acpi/acpi_bus.h> -#endif - -/* which logical CPU number maps to which CPU (physical APIC ID) */ -u8 x86_cpu_to_apicid[NR_CPUS] __read_mostly = { [0 ... NR_CPUS-1] = BAD_APICID }; -EXPORT_SYMBOL(x86_cpu_to_apicid); -u8 x86_cpu_to_log_apicid[NR_CPUS] = { [0 ... NR_CPUS-1] = BAD_APICID }; - -extern struct genapic apic_cluster; -extern struct genapic apic_flat; -extern struct genapic apic_physflat; - -#ifndef CONFIG_XEN -struct genapic *genapic = &apic_flat; -#else -extern struct genapic apic_xen; -struct genapic *genapic = &apic_xen; -#endif - - -/* - * Check the APIC IDs in bios_cpu_apicid and choose the APIC mode. - */ -void __init clustered_apic_check(void) -{ -#ifndef CONFIG_XEN - long i; - u8 clusters, max_cluster; - u8 id; - u8 cluster_cnt[NUM_APIC_CLUSTERS]; - int max_apic = 0; - -#if defined(CONFIG_ACPI) - /* - * Some x86_64 machines use physical APIC mode regardless of how many - * procs/clusters are present (x86_64 ES7000 is an example). - */ - if (acpi_fadt.revision > FADT2_REVISION_ID) - if (acpi_fadt.force_apic_physical_destination_mode) { - genapic = &apic_cluster; - goto print; - } -#endif - - memset(cluster_cnt, 0, sizeof(cluster_cnt)); - for (i = 0; i < NR_CPUS; i++) { - id = bios_cpu_apicid[i]; - if (id == BAD_APICID) - continue; - if (id > max_apic) - max_apic = id; - cluster_cnt[APIC_CLUSTERID(id)]++; - } - - /* Don't use clustered mode on AMD platforms. */ - if (boot_cpu_data.x86_vendor == X86_VENDOR_AMD) { - genapic = &apic_physflat; -#ifndef CONFIG_HOTPLUG_CPU - /* In the CPU hotplug case we cannot use broadcast mode - because that opens a race when a CPU is removed. - Stay at physflat mode in this case. - It is bad to do this unconditionally though. Once - we have ACPI platform support for CPU hotplug - we should detect hotplug capablity from ACPI tables and - only do this when really needed. -AK */ - if (max_apic <= 8) - genapic = &apic_flat; -#endif - goto print; - } - - clusters = 0; - max_cluster = 0; - - for (i = 0; i < NUM_APIC_CLUSTERS; i++) { - if (cluster_cnt[i] > 0) { - ++clusters; - if (cluster_cnt[i] > max_cluster) - max_cluster = cluster_cnt[i]; - } - } - - /* - * If we have clusters <= 1 and CPUs <= 8 in cluster 0, then flat mode, - * else if max_cluster <= 4 and cluster_cnt[15] == 0, clustered logical - * else physical mode. - * (We don't use lowest priority delivery + HW APIC IRQ steering, so - * can ignore the clustered logical case and go straight to physical.) - */ - if (clusters <= 1 && max_cluster <= 8 && cluster_cnt[0] == max_cluster) { -#ifdef CONFIG_HOTPLUG_CPU - /* Don't use APIC shortcuts in CPU hotplug to avoid races */ - genapic = &apic_physflat; -#else - genapic = &apic_flat; -#endif - } else - genapic = &apic_cluster; - -print: -#else - /* hardcode to xen apic functions */ - genapic = &apic_xen; -#endif - printk(KERN_INFO "Setting APIC routing to %s\n", genapic->name); -} - -/* Same for both flat and clustered. */ - -#ifdef CONFIG_XEN -extern void xen_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest); -#endif - -void send_IPI_self(int vector) -{ -#ifndef CONFIG_XEN - __send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL); -#else - xen_send_IPI_shortcut(APIC_DEST_SELF, vector, APIC_DEST_PHYSICAL); -#endif -} |