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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /arch/x86/kernel/apic/apic_common.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/kernel/apic/apic_common.c')
-rw-r--r-- | arch/x86/kernel/apic/apic_common.c | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/arch/x86/kernel/apic/apic_common.c b/arch/x86/kernel/apic/apic_common.c new file mode 100644 index 0000000000..7bc5d9bf59 --- /dev/null +++ b/arch/x86/kernel/apic/apic_common.c @@ -0,0 +1,57 @@ +/* + * Common functions shared between the various APIC flavours + * + * SPDX-License-Identifier: GPL-2.0 + */ +#include <linux/irq.h> +#include <asm/apic.h> + +#include "local.h" + +u32 apic_default_calc_apicid(unsigned int cpu) +{ + return per_cpu(x86_cpu_to_apicid, cpu); +} + +u32 apic_flat_calc_apicid(unsigned int cpu) +{ + return 1U << cpu; +} + +bool default_check_apicid_used(physid_mask_t *map, int apicid) +{ + return physid_isset(apicid, *map); +} + +void default_ioapic_phys_id_map(physid_mask_t *phys_map, physid_mask_t *retmap) +{ + *retmap = *phys_map; +} + +int default_cpu_present_to_apicid(int mps_cpu) +{ + if (mps_cpu < nr_cpu_ids && cpu_present(mps_cpu)) + return (int)per_cpu(x86_cpu_to_apicid, mps_cpu); + else + return BAD_APICID; +} +EXPORT_SYMBOL_GPL(default_cpu_present_to_apicid); + +bool default_apic_id_registered(void) +{ + return physid_isset(read_apic_id(), phys_cpu_present_map); +} + +/* + * Set up the logical destination ID when the APIC operates in logical + * destination mode. + */ +void default_init_apic_ldr(void) +{ + unsigned long val; + + apic_write(APIC_DFR, APIC_DFR_FLAT); + val = apic_read(APIC_LDR) & ~APIC_LDR_MASK; + val |= SET_APIC_LOGICAL_ID(1UL << smp_processor_id()); + apic_write(APIC_LDR, val); +} |