search for: cpumask_set_cpu

...common.c index e894eb278d83..eba1b7ac7294 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -423,6 +423,7 @@ int vp_set_vq_affinity(struct virtqueue *vq, int cpu) if (cpu == -1) irq_set_affinity_hint(irq, NULL); else { + cpumask_clear(mask); cpumask_set_cpu(cpu, mask); irq_set_affinity_hint(irq, mask); } -- 1.7.10.4

...common.c index e894eb278d83..eba1b7ac7294 100644 --- a/drivers/virtio/virtio_pci_common.c +++ b/drivers/virtio/virtio_pci_common.c @@ -423,6 +423,7 @@ int vp_set_vq_affinity(struct virtqueue *vq, int cpu) if (cpu == -1) irq_set_affinity_hint(irq, NULL); else { + cpumask_clear(mask); cpumask_set_cpu(cpu, mask); irq_set_affinity_hint(irq, mask); } -- 1.7.10.4

...nfo *vi) return; } + if (!alloc_cpumask_var(&cpumask, GFP_KERNEL)) + return; + i = 0; for_each_online_cpu(cpu) { virtqueue_set_affinity(vi->rq[i].vq, cpu); virtqueue_set_affinity(vi->sq[i].vq, cpu); - *per_cpu_ptr(vi->vq_index, cpu) = i; + cpumask_clear(cpumask); + cpumask_set_cpu(cpu, cpumask); + netif_set_xps_queue(vi->dev, cpumask, i); i++; } vi->affinity_hint_set = true; + free_cpumask_var(cpumask); } static int virtnet_cpu_callback(struct notifier_block *nfb, @@ -1217,28 +1210,6 @@ static int virtnet_change_mtu(struct net_device *dev, int new_mtu)...

...nfo *vi) return; } + if (!alloc_cpumask_var(&cpumask, GFP_KERNEL)) + return; + i = 0; for_each_online_cpu(cpu) { virtqueue_set_affinity(vi->rq[i].vq, cpu); virtqueue_set_affinity(vi->sq[i].vq, cpu); - *per_cpu_ptr(vi->vq_index, cpu) = i; + cpumask_clear(cpumask); + cpumask_set_cpu(cpu, cpumask); + netif_set_xps_queue(vi->dev, cpumask, i); i++; } vi->affinity_hint_set = true; + free_cpumask_var(cpumask); } static int virtnet_cpu_callback(struct notifier_block *nfb, @@ -1217,28 +1210,6 @@ static int virtnet_change_mtu(struct net_device *dev, int new_mtu)...

...ect_irq(struct vcpu *v, unsigned int irq, int virtual) n->irq = irq; n->priority = priority; if (!virtual) + { n->desc = irq_to_desc(irq); - else + cpumask_clear(&n->eoimask); + /* Assume we received the IRQ on the current pcpu */ + cpumask_set_cpu(smp_processor_id(), &n->eoimask); + } else { n->desc = NULL; + } /* the irq is enabled */ if ( rank->ienable & (1 << (irq % 32)) ) diff --git a/xen/include/asm-arm/domain.h b/xen/include/asm-arm/domain.h index cca7416..5561531 100644 --- a/xen/inclu...

...*pool, struct percpu_ida_cpu *tags) { @@ -1317,8 +1327,8 @@ int percpu_ida_alloc(struct percpu_ida *pool, gfp_t gfp) if (tags->nr_free) { tag = tags->freelist[--tags->nr_free]; if (tags->nr_free) - set_bit(smp_processor_id(), - pool->cpus_have_tags); + cpumask_set_cpu(smp_processor_id(), + &pool->cpus_have_tags); } spin_unlock(&pool->lock); @@ -1363,8 +1373,8 @@ void percpu_ida_free(struct percpu_ida *pool, unsigned tag) spin_unlock(&tags->lock); if (nr_free == 1) { - set_bit(smp_processor_id(), - pool->cpus_have_tag...

This patch series implements SMP boot for arch/arm, as far as getting all CPUs up and running the idle loop. Changes from v1: - moved barriers out of loop in udelay() - dropped broken GIC change in favour of explanatory comment - made the increment of ready_cpus atomic (I couldn''t move the increment to before signalling the next CPU because the PT switch has to happen between

...= per_cpu(cpufreq_cpu_policy, firstcpu); per_cpu(cpufreq_cpu_policy, cpu) = policy; @@ -201,15 +213,15 @@ int cpufreq_add_cpu(unsigned int cpu) printk("adding CPU %u\n", cpu); } - cpu_set(cpu, policy->cpus); - cpu_set(cpu, cpufreq_dom->map); + cpumask_set_cpu(cpu, policy->cpus); + cpumask_set_cpu(cpu, cpufreq_dom->map); ret = cpufreq_statistic_init(cpu); if (ret) goto err1; - if (hw_all || - (cpus_weight(cpufreq_dom->map) == perf->domain_info.num_processors)) { + if (hw_all || (cpumask_weight(cpufreq_do...

...ev_active()) can't you just use is_prot_virt_guest here? > + return; > + > + /* make sure bounce buffers are shared */ > + swiotlb_init(1); > + swiotlb_update_mem_attributes(); > + swiotlb_force = SWIOTLB_FORCE; > +} > + > void __init mem_init(void) > { > cpumask_set_cpu(0, &init_mm.context.cpu_attach_mask); > @@ -134,6 +182,8 @@ void __init mem_init(void) > set_max_mapnr(max_low_pfn); > high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); > > + pv_init(); > + > /* Setup guest page hinting */ > cmma_init(); >

...ev_active()) can't you just use is_prot_virt_guest here? > + return; > + > + /* make sure bounce buffers are shared */ > + swiotlb_init(1); > + swiotlb_update_mem_attributes(); > + swiotlb_force = SWIOTLB_FORCE; > +} > + > void __init mem_init(void) > { > cpumask_set_cpu(0, &init_mm.context.cpu_attach_mask); > @@ -134,6 +182,8 @@ void __init mem_init(void) > set_max_mapnr(max_low_pfn); > high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); > > + pv_init(); > + > /* Setup guest page hinting */ > cmma_init(); >

With virt_spin_lock() being guarded by a static key the bare metal case can be optimized by patching the call away completely. In case a kernel running as a guest it can decide whether to use paravitualized spinlocks, the current fallback to the unfair test-and-set scheme, or to mimic the bare metal behavior. V2: - use static key instead of making virt_spin_lock() a pvops function Juergen Gross

With virt_spin_lock() being guarded by a static key the bare metal case can be optimized by patching the call away completely. In case a kernel running as a guest it can decide whether to use paravitualized spinlocks, the current fallback to the unfair test-and-set scheme, or to mimic the bare metal behavior. V2: - use static key instead of making virt_spin_lock() a pvops function Juergen Gross

Hi, This is the fifth version of this patch series. With the Versatile Express TC2, it''s possible to boot only with A7 or A15. If the user choose to boot with only A7, the CPU ID will start at 0x100. As Xen relies on it to set the logical ID and the GIC, it won''t be possible to use Xen with this use case. This patch series is divided in 3 parts: - Patch 1: prepare Xen

...ndif /* CONFIG_PARAVIRT_SPINLOCKS */ > #endif /* CONFIG_PARAVIRT */ Because I think the above only ever uses native_virt_spin_lock() when PARAVIRT. > @@ -1381,6 +1382,7 @@ void __init native_smp_prepare_boot_cpu(void) > /* already set me in cpu_online_mask in boot_cpu_init() */ > cpumask_set_cpu(me, cpu_callout_mask); > cpu_set_state_online(me); > + native_pv_lock_init(); > } Aah, this is where that goes.. OK that works too.

...; +static void pv_init(void) > +{ > + if (!sev_active()) > + return; > + > + /* make sure bounce buffers are shared */ > + swiotlb_init(1); > + swiotlb_update_mem_attributes(); > + swiotlb_force = SWIOTLB_FORCE; > +} > + > void __init mem_init(void) > { > cpumask_set_cpu(0, &init_mm.context.cpu_attach_mask); > @@ -134,6 +176,8 @@ void __init mem_init(void) > set_max_mapnr(max_low_pfn); > high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); > > + pv_init(); > + > /* Setup guest page hinting */ > cmma_init(); >

...ndif /* CONFIG_PARAVIRT_SPINLOCKS */ > #endif /* CONFIG_PARAVIRT */ Because I think the above only ever uses native_virt_spin_lock() when PARAVIRT. > @@ -1381,6 +1382,7 @@ void __init native_smp_prepare_boot_cpu(void) > /* already set me in cpu_online_mask in boot_cpu_init() */ > cpumask_set_cpu(me, cpu_callout_mask); > cpu_set_state_online(me); > + native_pv_lock_init(); > } Aah, this is where that goes.. OK that works too.

...k_var(&cpumask, GFP_KERNEL)) > + return; > + > i = 0; > for_each_online_cpu(cpu) { > virtqueue_set_affinity(vi->rq[i].vq, cpu); > virtqueue_set_affinity(vi->sq[i].vq, cpu); > - *per_cpu_ptr(vi->vq_index, cpu) = i; > + cpumask_clear(cpumask); > + cpumask_set_cpu(cpu, cpumask); > + netif_set_xps_queue(vi->dev, cpumask, i); > i++; > } > > vi->affinity_hint_set = true; > + free_cpumask_var(cpumask); > } Um, isn't this just cpumask_of(cpu)? Cheers, Rusty.

...; #include <asm/realmode.h> #include <asm/misc.h> +#include <asm/qspinlock.h> /* Number of siblings per CPU package */ int smp_num_siblings = 1; @@ -1381,6 +1382,7 @@ void __init native_smp_prepare_boot_cpu(void) /* already set me in cpu_online_mask in boot_cpu_init() */ cpumask_set_cpu(me, cpu_callout_mask); cpu_set_state_online(me); + native_pv_lock_init(); } void __init native_smp_cpus_done(unsigned int max_cpus) diff --git a/kernel/locking/qspinlock.c b/kernel/locking/qspinlock.c index 294294c71ba4..838d235b87ef 100644 --- a/kernel/locking/qspinlock.c +++ b/kernel/lockin...

...+EXPORT_SYMBOL_GPL(sev_active); + +/* protected virtualization */ +static void pv_init(void) +{ + if (!sev_active()) + return; + + /* make sure bounce buffers are shared */ + swiotlb_init(1); + swiotlb_update_mem_attributes(); + swiotlb_force = SWIOTLB_FORCE; +} + void __init mem_init(void) { cpumask_set_cpu(0, &init_mm.context.cpu_attach_mask); @@ -134,6 +182,8 @@ void __init mem_init(void) set_max_mapnr(max_low_pfn); high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); + pv_init(); + /* Setup guest page hinting */ cmma_init(); -- 2.16.4

...is_prot_virt_guest(); +} + +/* protected virtualization */ +static void pv_init(void) +{ + if (!is_prot_virt_guest()) + return; + + /* make sure bounce buffers are shared */ + swiotlb_init(1); + swiotlb_update_mem_attributes(); + swiotlb_force = SWIOTLB_FORCE; +} + void __init mem_init(void) { cpumask_set_cpu(0, &init_mm.context.cpu_attach_mask); @@ -136,6 +181,8 @@ void __init mem_init(void) set_max_mapnr(max_low_pfn); high_memory = (void *) __va(max_low_pfn * PAGE_SIZE); + pv_init(); + /* Setup guest page hinting */ cmma_init(); -- 2.17.1