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 | 161 |
1 files changed, 0 insertions, 161 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 1171aad778..0000000000 --- a/linux-2.6-xen-sparse/arch/x86_64/kernel/genapic_xen.c +++ /dev/null @@ -1,161 +0,0 @@ -/* - * Copyright 2004 James Cleverdon, IBM. - * Subject to the GNU Public License, v.2 - * - * Xen APIC subarch code. Maximum 8 CPUs, logical delivery. - * - * Hacked for x86-64 by James Cleverdon from i386 architecture code by - * Martin Bligh, Andi Kleen, James Bottomley, John Stultz, and - * James Cleverdon. - * - * Hacked to pieces for Xen by Chris Wright. - */ -#include <linux/threads.h> -#include <linux/cpumask.h> -#include <linux/string.h> -#include <linux/kernel.h> -#include <linux/ctype.h> -#include <linux/init.h> -#ifdef CONFIG_XEN_PRIVILEGED_GUEST -#include <asm/smp.h> -#include <asm/ipi.h> -#else -#include <asm/apic.h> -#include <asm/apicdef.h> -#include <asm/genapic.h> -#endif -#include <xen/evtchn.h> - -DECLARE_PER_CPU(int, ipi_to_irq[NR_IPIS]); - -static inline void __send_IPI_one(unsigned int cpu, int vector) -{ - int irq = per_cpu(ipi_to_irq, cpu)[vector]; - BUG_ON(irq < 0); - notify_remote_via_irq(irq); -} - -void xen_send_IPI_shortcut(unsigned int shortcut, int vector, unsigned int dest) -{ - int cpu; - - switch (shortcut) { - case APIC_DEST_SELF: - __send_IPI_one(smp_processor_id(), vector); - break; - case APIC_DEST_ALLBUT: - for (cpu = 0; cpu < NR_CPUS; ++cpu) { - if (cpu == smp_processor_id()) - continue; - if (cpu_isset(cpu, cpu_online_map)) { - __send_IPI_one(cpu, vector); - } - } - break; - case APIC_DEST_ALLINC: - for (cpu = 0; cpu < NR_CPUS; ++cpu) { - if (cpu_isset(cpu, cpu_online_map)) { - __send_IPI_one(cpu, vector); - } - } - break; - default: - printk("XXXXXX __send_IPI_shortcut %08x vector %d\n", shortcut, - vector); - break; - } -} - -static cpumask_t xen_target_cpus(void) -{ - return cpu_online_map; -} - -/* - * Set up the logical destination ID. - * Do nothing, not called now. - */ -static void xen_init_apic_ldr(void) -{ - Dprintk("%s\n", __FUNCTION__); - return; -} - -static void xen_send_IPI_allbutself(int vector) -{ - /* - * if there are no other CPUs in the system then - * we get an APIC send error if we try to broadcast. - * thus we have to avoid sending IPIs in this case. - */ - Dprintk("%s\n", __FUNCTION__); - if (num_online_cpus() > 1) - xen_send_IPI_shortcut(APIC_DEST_ALLBUT, vector, APIC_DEST_LOGICAL); -} - -static void xen_send_IPI_all(int vector) -{ - Dprintk("%s\n", __FUNCTION__); - xen_send_IPI_shortcut(APIC_DEST_ALLINC, vector, APIC_DEST_LOGICAL); -} - -static void xen_send_IPI_mask(cpumask_t cpumask, int vector) -{ - unsigned long mask = cpus_addr(cpumask)[0]; - unsigned int cpu; - unsigned long flags; - - Dprintk("%s\n", __FUNCTION__); - local_irq_save(flags); - WARN_ON(mask & ~cpus_addr(cpu_online_map)[0]); - - for (cpu = 0; cpu < NR_CPUS; ++cpu) { - if (cpu_isset(cpu, cpumask)) { - __send_IPI_one(cpu, vector); - } - } - local_irq_restore(flags); -} - -#ifdef CONFIG_XEN_PRIVILEGED_GUEST -static int xen_apic_id_registered(void) -{ - /* better be set */ - Dprintk("%s\n", __FUNCTION__); - return physid_isset(smp_processor_id(), phys_cpu_present_map); -} -#endif - -static unsigned int xen_cpu_mask_to_apicid(cpumask_t cpumask) -{ - Dprintk("%s\n", __FUNCTION__); - return cpus_addr(cpumask)[0] & APIC_ALL_CPUS; -} - -static unsigned int phys_pkg_id(int index_msb) -{ - u32 ebx; - - Dprintk("%s\n", __FUNCTION__); - ebx = cpuid_ebx(1); - return ((ebx >> 24) & 0xFF) >> index_msb; -} - -struct genapic apic_xen = { - .name = "xen", -#ifdef CONFIG_XEN_PRIVILEGED_GUEST - .int_delivery_mode = dest_LowestPrio, -#endif - .int_dest_mode = (APIC_DEST_LOGICAL != 0), - .int_delivery_dest = APIC_DEST_LOGICAL | APIC_DM_LOWEST, - .target_cpus = xen_target_cpus, -#ifdef CONFIG_XEN_PRIVILEGED_GUEST - .apic_id_registered = xen_apic_id_registered, -#endif - .init_apic_ldr = xen_init_apic_ldr, - .send_IPI_all = xen_send_IPI_all, - .send_IPI_allbutself = xen_send_IPI_allbutself, - .send_IPI_mask = xen_send_IPI_mask, - .cpu_mask_to_apicid = xen_cpu_mask_to_apicid, - .phys_pkg_id = phys_pkg_id, -}; |