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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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2c6e6db41f
This attached patch significantly shrinks boot memory allocation on ia64. It does this by not allocating per_cpu areas for cpus that can never exist. In the case where acpi does not have any numa node description of the cpus, I defaulted to assigning the first 32 round-robin on the known nodes.. For the !CONFIG_ACPI I used for_each_possible_cpu(). Signed-off-by: Robin Holt <holt@sgi.com> Signed-off-by: Tony Luck <tony.luck@intel.com>
168 lines
4.8 KiB
C
168 lines
4.8 KiB
C
/*
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* asm-ia64/acpi.h
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*
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* Copyright (C) 1999 VA Linux Systems
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* Copyright (C) 1999 Walt Drummond <drummond@valinux.com>
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* Copyright (C) 2000,2001 J.I. Lee <jung-ik.lee@intel.com>
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* Copyright (C) 2001,2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*
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* ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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*/
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#ifndef _ASM_ACPI_H
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#define _ASM_ACPI_H
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#ifdef __KERNEL__
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#include <acpi/pdc_intel.h>
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#include <linux/init.h>
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#include <linux/numa.h>
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#include <asm/system.h>
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#include <asm/numa.h>
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#define COMPILER_DEPENDENT_INT64 long
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#define COMPILER_DEPENDENT_UINT64 unsigned long
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/*
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* Calling conventions:
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*
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* ACPI_SYSTEM_XFACE - Interfaces to host OS (handlers, threads)
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* ACPI_EXTERNAL_XFACE - External ACPI interfaces
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* ACPI_INTERNAL_XFACE - Internal ACPI interfaces
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* ACPI_INTERNAL_VAR_XFACE - Internal variable-parameter list interfaces
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*/
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#define ACPI_SYSTEM_XFACE
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#define ACPI_EXTERNAL_XFACE
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#define ACPI_INTERNAL_XFACE
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#define ACPI_INTERNAL_VAR_XFACE
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/* Asm macros */
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#define ACPI_ASM_MACROS
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#define BREAKPOINT3
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#define ACPI_DISABLE_IRQS() local_irq_disable()
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#define ACPI_ENABLE_IRQS() local_irq_enable()
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#define ACPI_FLUSH_CPU_CACHE()
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static inline int
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ia64_acpi_acquire_global_lock (unsigned int *lock)
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{
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unsigned int old, new, val;
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do {
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old = *lock;
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new = (((old & ~0x3) + 2) + ((old >> 1) & 0x1));
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val = ia64_cmpxchg4_acq(lock, new, old);
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} while (unlikely (val != old));
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return (new < 3) ? -1 : 0;
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}
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static inline int
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ia64_acpi_release_global_lock (unsigned int *lock)
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{
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unsigned int old, new, val;
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do {
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old = *lock;
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new = old & ~0x3;
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val = ia64_cmpxchg4_acq(lock, new, old);
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} while (unlikely (val != old));
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return old & 0x1;
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}
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#define ACPI_ACQUIRE_GLOBAL_LOCK(facs, Acq) \
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((Acq) = ia64_acpi_acquire_global_lock(&facs->global_lock))
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#define ACPI_RELEASE_GLOBAL_LOCK(facs, Acq) \
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((Acq) = ia64_acpi_release_global_lock(&facs->global_lock))
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#define acpi_disabled 0 /* ACPI always enabled on IA64 */
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#define acpi_noirq 0 /* ACPI always enabled on IA64 */
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#define acpi_pci_disabled 0 /* ACPI PCI always enabled on IA64 */
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#define acpi_strict 1 /* no ACPI spec workarounds on IA64 */
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#define acpi_processor_cstate_check(x) (x) /* no idle limits on IA64 :) */
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static inline void disable_acpi(void) { }
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const char *acpi_get_sysname (void);
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int acpi_request_vector (u32 int_type);
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int acpi_gsi_to_irq (u32 gsi, unsigned int *irq);
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/* routines for saving/restoring kernel state */
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extern int acpi_save_state_mem(void);
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extern void acpi_restore_state_mem(void);
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extern unsigned long acpi_wakeup_address;
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/*
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* Record the cpei override flag and current logical cpu. This is
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* useful for CPU removal.
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*/
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extern unsigned int can_cpei_retarget(void);
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extern unsigned int is_cpu_cpei_target(unsigned int cpu);
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extern void set_cpei_target_cpu(unsigned int cpu);
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extern unsigned int get_cpei_target_cpu(void);
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extern void prefill_possible_map(void);
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#ifdef CONFIG_ACPI_HOTPLUG_CPU
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extern int additional_cpus;
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#else
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#define additional_cpus 0
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#endif
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#ifdef CONFIG_ACPI_NUMA
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#if MAX_NUMNODES > 256
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#define MAX_PXM_DOMAINS MAX_NUMNODES
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#else
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#define MAX_PXM_DOMAINS (256)
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#endif
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extern int __devinitdata pxm_to_nid_map[MAX_PXM_DOMAINS];
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extern int __initdata nid_to_pxm_map[MAX_NUMNODES];
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#endif
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#define acpi_unlazy_tlb(x)
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#ifdef CONFIG_ACPI_NUMA
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extern cpumask_t early_cpu_possible_map;
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#define for_each_possible_early_cpu(cpu) \
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for_each_cpu_mask((cpu), early_cpu_possible_map)
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static inline void per_cpu_scan_finalize(int min_cpus, int reserve_cpus)
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{
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int low_cpu, high_cpu;
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int cpu;
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int next_nid = 0;
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low_cpu = cpus_weight(early_cpu_possible_map);
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high_cpu = max(low_cpu, min_cpus);
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high_cpu = min(high_cpu + reserve_cpus, NR_CPUS);
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for (cpu = low_cpu; cpu < high_cpu; cpu++) {
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cpu_set(cpu, early_cpu_possible_map);
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if (node_cpuid[cpu].nid == NUMA_NO_NODE) {
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node_cpuid[cpu].nid = next_nid;
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next_nid++;
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if (next_nid >= num_online_nodes())
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next_nid = 0;
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}
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}
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}
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#endif /* CONFIG_ACPI_NUMA */
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#endif /*__KERNEL__*/
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#endif /*_ASM_ACPI_H*/
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