Messages in this thread Patch in this message | | | Subject | [PATCH v2 2/3] x86: devicetree: enable multiprocessing in DT | From | Ivan Gorinov <> | Date | Wed, 28 Feb 2018 18:45:34 -0800 |
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Adding code to register processors described in Device Tree. APIC ID is specified in 'intel-apic_id' propery as used in U-Boot. First address specified in 'reg' is used as default APIC ID.
Signed-off-by: Ivan Gorinov <ivan.gorinov@intel.com> --- arch/x86/kernel/devicetree.c | 26 ++++++++++++++++++++++++-- 1 file changed, 24 insertions(+), 2 deletions(-)
diff --git a/arch/x86/kernel/devicetree.c b/arch/x86/kernel/devicetree.c index 44189ee..ef1cd85 100644 --- a/arch/x86/kernel/devicetree.c +++ b/arch/x86/kernel/devicetree.c @@ -130,6 +130,29 @@ static void __init dtb_setup_hpet(void) #endif } +static void __init dtb_cpu_setup(void) +{ + struct device_node *dn; + struct resource r; + const void *prop; + int apic_id, version; + int ret; + + version = GET_APIC_VERSION(apic_read(APIC_LVR)); + for_each_node_by_type(dn, "cpu") { + prop = of_get_property(dn, "intel,apic-id", NULL); + if (prop) { + apic_id = be32_to_cpup(prop); + } else { + ret = of_address_to_resource(dn, 0, &r); + if (WARN_ON(ret)) + continue; + apic_id = r.start; + } + generic_processor_info(apic_id, version); + } +} + static void __init dtb_lapic_setup(void) { #ifdef CONFIG_X86_LOCAL_APIC @@ -153,8 +176,6 @@ static void __init dtb_lapic_setup(void) smp_found_config = 1; pic_mode = 1; register_lapic_address(r.start); - generic_processor_info(boot_cpu_physical_apicid, - GET_APIC_VERSION(apic_read(APIC_LVR))); #endif } @@ -256,6 +277,7 @@ static void __init dtb_ioapic_setup(void) {} static void __init dtb_apic_setup(void) { dtb_lapic_setup(); + dtb_cpu_setup(); dtb_ioapic_setup(); } -- 2.7.4
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