diff options
Diffstat (limited to 'arch/x86_64/kernel/genapic_flat.c')
| -rw-r--r-- | arch/x86_64/kernel/genapic_flat.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/x86_64/kernel/genapic_flat.c b/arch/x86_64/kernel/genapic_flat.c index 50ad153eaac4..0dfc223c1839 100644 --- a/arch/x86_64/kernel/genapic_flat.c +++ b/arch/x86_64/kernel/genapic_flat.c @@ -22,6 +22,20 @@ static cpumask_t flat_target_cpus(void) return cpu_online_map; } +static cpumask_t flat_vector_allocation_domain(int cpu) +{ + /* Careful. Some cpus do not strictly honor the set of cpus + * specified in the interrupt destination when using lowest + * priority interrupt delivery mode. + * + * In particular there was a hyperthreading cpu observed to + * deliver interrupts to the wrong hyperthread when only one + * hyperthread was specified in the interrupt desitination. + */ + cpumask_t domain = { { [0] = APIC_ALL_CPUS, } }; + return domain; +} + /* * Set up the logical destination ID. * @@ -121,6 +135,7 @@ struct genapic apic_flat = { .int_delivery_mode = dest_LowestPrio, .int_dest_mode = (APIC_DEST_LOGICAL != 0), .target_cpus = flat_target_cpus, + .vector_allocation_domain = flat_vector_allocation_domain, .apic_id_registered = flat_apic_id_registered, .init_apic_ldr = flat_init_apic_ldr, .send_IPI_all = flat_send_IPI_all, @@ -141,6 +156,14 @@ static cpumask_t physflat_target_cpus(void) return cpumask_of_cpu(0); } +static cpumask_t physflat_vector_allocation_domain(int cpu) +{ + cpumask_t domain = CPU_MASK_NONE; + cpu_set(cpu, domain); + return domain; +} + + static void physflat_send_IPI_mask(cpumask_t cpumask, int vector) { send_IPI_mask_sequence(cpumask, vector); @@ -179,6 +202,7 @@ struct genapic apic_physflat = { .int_delivery_mode = dest_Fixed, .int_dest_mode = (APIC_DEST_PHYSICAL != 0), .target_cpus = physflat_target_cpus, + .vector_allocation_domain = physflat_vector_allocation_domain, .apic_id_registered = flat_apic_id_registered, .init_apic_ldr = flat_init_apic_ldr,/*not needed, but shouldn't hurt*/ .send_IPI_all = physflat_send_IPI_all, |