8c44963b60
apic::irq_dest_mode is actually a boolean, but defined as u32 and named in a way which does not explain what it means. Make it a boolean and rename it to 'dest_mode_logical' Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: David Woodhouse <dwmw@amazon.co.uk> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Link: https://lore.kernel.org/r/20201024213535.443185-9-dwmw2@infradead.org
210 lines
4.9 KiB
C
210 lines
4.9 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Default generic APIC driver. This handles up to 8 CPUs.
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*
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* Copyright 2003 Andi Kleen, SuSE Labs.
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*
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* Generic x86 APIC driver probe layer.
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*/
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#include <linux/export.h>
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#include <linux/errno.h>
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#include <linux/smp.h>
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#include <asm/io_apic.h>
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#include <asm/apic.h>
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#include <asm/acpi.h>
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#include "local.h"
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static int default_x86_32_early_logical_apicid(int cpu)
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{
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return 1 << cpu;
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}
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static void setup_apic_flat_routing(void)
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{
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#ifdef CONFIG_X86_IO_APIC
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printk(KERN_INFO
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"Enabling APIC mode: Flat. Using %d I/O APICs\n",
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nr_ioapics);
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#endif
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}
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static int default_apic_id_registered(void)
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{
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return physid_isset(read_apic_id(), phys_cpu_present_map);
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}
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/*
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* Set up the logical destination ID. Intel recommends to set DFR, LDR and
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* TPR before enabling an APIC. See e.g. "AP-388 82489DX User's Manual"
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* (Intel document number 292116).
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*/
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static void default_init_apic_ldr(void)
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{
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unsigned long val;
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apic_write(APIC_DFR, APIC_DFR_VALUE);
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val = apic_read(APIC_LDR) & ~APIC_LDR_MASK;
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val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id());
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apic_write(APIC_LDR, val);
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}
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static int default_phys_pkg_id(int cpuid_apic, int index_msb)
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{
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return cpuid_apic >> index_msb;
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}
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/* should be called last. */
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static int probe_default(void)
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{
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return 1;
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}
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static struct apic apic_default __ro_after_init = {
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.name = "default",
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.probe = probe_default,
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.acpi_madt_oem_check = NULL,
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.apic_id_valid = default_apic_id_valid,
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.apic_id_registered = default_apic_id_registered,
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.delivery_mode = APIC_DELIVERY_MODE_FIXED,
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.dest_mode_logical = true,
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.disable_esr = 0,
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.check_apicid_used = default_check_apicid_used,
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.init_apic_ldr = default_init_apic_ldr,
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.ioapic_phys_id_map = default_ioapic_phys_id_map,
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.setup_apic_routing = setup_apic_flat_routing,
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.cpu_present_to_apicid = default_cpu_present_to_apicid,
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.apicid_to_cpu_present = physid_set_mask_of_physid,
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.check_phys_apicid_present = default_check_phys_apicid_present,
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.phys_pkg_id = default_phys_pkg_id,
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.get_apic_id = default_get_apic_id,
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.set_apic_id = NULL,
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.calc_dest_apicid = apic_flat_calc_apicid,
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.send_IPI = default_send_IPI_single,
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.send_IPI_mask = default_send_IPI_mask_logical,
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.send_IPI_mask_allbutself = default_send_IPI_mask_allbutself_logical,
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.send_IPI_allbutself = default_send_IPI_allbutself,
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.send_IPI_all = default_send_IPI_all,
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.send_IPI_self = default_send_IPI_self,
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.inquire_remote_apic = default_inquire_remote_apic,
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.read = native_apic_mem_read,
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.write = native_apic_mem_write,
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.eoi_write = native_apic_mem_write,
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.icr_read = native_apic_icr_read,
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.icr_write = native_apic_icr_write,
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.wait_icr_idle = native_apic_wait_icr_idle,
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.safe_wait_icr_idle = native_safe_apic_wait_icr_idle,
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.x86_32_early_logical_apicid = default_x86_32_early_logical_apicid,
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};
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apic_driver(apic_default);
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struct apic *apic __ro_after_init = &apic_default;
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EXPORT_SYMBOL_GPL(apic);
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static int cmdline_apic __initdata;
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static int __init parse_apic(char *arg)
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{
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struct apic **drv;
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if (!arg)
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return -EINVAL;
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for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
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if (!strcmp((*drv)->name, arg)) {
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apic = *drv;
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cmdline_apic = 1;
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return 0;
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}
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}
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/* Parsed again by __setup for debug/verbose */
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return 0;
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}
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early_param("apic", parse_apic);
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void __init default_setup_apic_routing(void)
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{
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int version = boot_cpu_apic_version;
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if (num_possible_cpus() > 8) {
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switch (boot_cpu_data.x86_vendor) {
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case X86_VENDOR_INTEL:
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if (!APIC_XAPIC(version)) {
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def_to_bigsmp = 0;
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break;
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}
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/* P4 and above */
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fallthrough;
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case X86_VENDOR_HYGON:
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case X86_VENDOR_AMD:
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def_to_bigsmp = 1;
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}
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}
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#ifdef CONFIG_X86_BIGSMP
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/*
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* This is used to switch to bigsmp mode when
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* - There is no apic= option specified by the user
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* - generic_apic_probe() has chosen apic_default as the sub_arch
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* - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support
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*/
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if (!cmdline_apic && apic == &apic_default)
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generic_bigsmp_probe();
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#endif
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if (apic->setup_apic_routing)
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apic->setup_apic_routing();
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}
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void __init generic_apic_probe(void)
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{
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if (!cmdline_apic) {
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struct apic **drv;
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for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
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if ((*drv)->probe()) {
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apic = *drv;
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break;
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}
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}
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/* Not visible without early console */
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if (drv == __apicdrivers_end)
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panic("Didn't find an APIC driver");
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}
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printk(KERN_INFO "Using APIC driver %s\n", apic->name);
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}
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/* This function can switch the APIC even after the initial ->probe() */
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int __init default_acpi_madt_oem_check(char *oem_id, char *oem_table_id)
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{
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struct apic **drv;
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for (drv = __apicdrivers; drv < __apicdrivers_end; drv++) {
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if (!(*drv)->acpi_madt_oem_check)
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continue;
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if (!(*drv)->acpi_madt_oem_check(oem_id, oem_table_id))
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continue;
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if (!cmdline_apic) {
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apic = *drv;
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printk(KERN_INFO "Switched to APIC driver `%s'.\n",
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apic->name);
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}
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return 1;
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}
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return 0;
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}
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