From f841d792e38f75f5e25b0b66f7b5d235d180a735 Mon Sep 17 00:00:00 2001 From: Jiang Liu Date: Fri, 30 Mar 2012 23:11:35 +0800 Subject: x86: Return IRQ_SET_MASK_OK_NOCOPY from irq affinity functions The interrupt chip irq_set_affinity() functions copy the affinity mask to irq_data->affinity but return 0, i.e. IRQ_SET_MASK_OK. IRQ_SET_MASK_OK causes the core code to do another redundant copy. Return IRQ_SET_MASK_OK_NOCOPY to avoid this. Signed-off-by: Jiang Liu Cc: Suresh Siddha Cc: Yinghai Lu Cc: Naga Chumbalkar Cc: Jacob Pan Cc: Cliff Wickman Cc: Jiang Liu Cc: Keping Chen Link: http://lkml.kernel.org/r/1333120296-13563-4-git-send-email-jiang.liu@huawei.com Signed-off-by: Thomas Gleixner --- arch/x86/kernel/apic/io_apic.c | 9 +++++---- 1 file changed, 5 insertions(+), 4 deletions(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index ac96561d1a99..bce2001b2644 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -2270,6 +2270,7 @@ ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask, /* Only the high 8 bits are valid. */ dest = SET_APIC_LOGICAL_ID(dest); __target_IO_APIC_irq(irq, dest, data->chip_data); + ret = IRQ_SET_MASK_OK_NOCOPY; } raw_spin_unlock_irqrestore(&ioapic_lock, flags); return ret; @@ -3092,7 +3093,7 @@ msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) __write_msi_msg(data->msi_desc, &msg); - return 0; + return IRQ_SET_MASK_OK_NOCOPY; } #endif /* CONFIG_SMP */ @@ -3214,7 +3215,7 @@ dmar_msi_set_affinity(struct irq_data *data, const struct cpumask *mask, dmar_msi_write(irq, &msg); - return 0; + return IRQ_SET_MASK_OK_NOCOPY; } #endif /* CONFIG_SMP */ @@ -3267,7 +3268,7 @@ static int hpet_msi_set_affinity(struct irq_data *data, hpet_msi_write(data->handler_data, &msg); - return 0; + return IRQ_SET_MASK_OK_NOCOPY; } #endif /* CONFIG_SMP */ @@ -3340,7 +3341,7 @@ ht_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) return -1; target_ht_irq(data->irq, dest, cfg->vector); - return 0; + return IRQ_SET_MASK_OK_NOCOPY; } #endif -- cgit v1.2.3 From c767a54ba0657e52e6edaa97cbe0b0a8bf1c1655 Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Mon, 21 May 2012 19:50:07 -0700 Subject: x86/debug: Add KERN_ to bare printks, convert printks to pr_ Use a more current logging style: - Bare printks should have a KERN_ for consistency's sake - Add pr_fmt where appropriate - Neaten some macro definitions - Convert some Ok output to OK - Use "%s: ", __func__ in pr_fmt for summit - Convert some printks to pr_ Message output is not identical in all cases. Signed-off-by: Joe Perches Cc: levinsasha928@gmail.com Link: http://lkml.kernel.org/r/1337655007.24226.10.camel@joe2Laptop [ merged two similar patches, tidied up the changelog ] Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/io_apic.c | 38 +++++++++++++++++++------------------- 1 file changed, 19 insertions(+), 19 deletions(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index ac96561d1a99..5155d6f806f5 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -448,8 +448,8 @@ static int __add_pin_to_irq_node(struct irq_cfg *cfg, int node, int apic, int pi entry = alloc_irq_pin_list(node); if (!entry) { - printk(KERN_ERR "can not alloc irq_pin_list (%d,%d,%d)\n", - node, apic, pin); + pr_err("can not alloc irq_pin_list (%d,%d,%d)\n", + node, apic, pin); return -ENOMEM; } entry->apic = apic; @@ -661,7 +661,7 @@ static void clear_IO_APIC_pin(unsigned int apic, unsigned int pin) ioapic_mask_entry(apic, pin); entry = ioapic_read_entry(apic, pin); if (entry.irr) - printk(KERN_ERR "Unable to reset IRR for apic: %d, pin :%d\n", + pr_err("Unable to reset IRR for apic: %d, pin :%d\n", mpc_ioapic_id(apic), pin); } @@ -895,7 +895,7 @@ static int irq_polarity(int idx) } case 2: /* reserved */ { - printk(KERN_WARNING "broken BIOS!!\n"); + pr_warn("broken BIOS!!\n"); polarity = 1; break; } @@ -906,7 +906,7 @@ static int irq_polarity(int idx) } default: /* invalid */ { - printk(KERN_WARNING "broken BIOS!!\n"); + pr_warn("broken BIOS!!\n"); polarity = 1; break; } @@ -948,7 +948,7 @@ static int irq_trigger(int idx) } default: { - printk(KERN_WARNING "broken BIOS!!\n"); + pr_warn("broken BIOS!!\n"); trigger = 1; break; } @@ -962,7 +962,7 @@ static int irq_trigger(int idx) } case 2: /* reserved */ { - printk(KERN_WARNING "broken BIOS!!\n"); + pr_warn("broken BIOS!!\n"); trigger = 1; break; } @@ -973,7 +973,7 @@ static int irq_trigger(int idx) } default: /* invalid */ { - printk(KERN_WARNING "broken BIOS!!\n"); + pr_warn("broken BIOS!!\n"); trigger = 0; break; } @@ -991,7 +991,7 @@ static int pin_2_irq(int idx, int apic, int pin) * Debugging check, we are in big trouble if this message pops up! */ if (mp_irqs[idx].dstirq != pin) - printk(KERN_ERR "broken BIOS or MPTABLE parser, ayiee!!\n"); + pr_err("broken BIOS or MPTABLE parser, ayiee!!\n"); if (test_bit(bus, mp_bus_not_pci)) { irq = mp_irqs[idx].srcbusirq; @@ -1521,7 +1521,6 @@ __apicdebuginit(void) print_IO_APIC(int ioapic_idx) reg_03.raw = io_apic_read(ioapic_idx, 3); raw_spin_unlock_irqrestore(&ioapic_lock, flags); - printk("\n"); printk(KERN_DEBUG "IO APIC #%d......\n", mpc_ioapic_id(ioapic_idx)); printk(KERN_DEBUG ".... register #00: %08X\n", reg_00.raw); printk(KERN_DEBUG "....... : physical APIC id: %02X\n", reg_00.bits.ID); @@ -1578,7 +1577,7 @@ __apicdebuginit(void) print_IO_APIC(int ioapic_idx) i, ir_entry->index ); - printk("%1d %1d %1d %1d %1d " + pr_cont("%1d %1d %1d %1d %1d " "%1d %1d %X %02X\n", ir_entry->format, ir_entry->mask, @@ -1598,7 +1597,7 @@ __apicdebuginit(void) print_IO_APIC(int ioapic_idx) i, entry.dest ); - printk("%1d %1d %1d %1d %1d " + pr_cont("%1d %1d %1d %1d %1d " "%1d %1d %02X\n", entry.mask, entry.trigger, @@ -1651,8 +1650,8 @@ __apicdebuginit(void) print_IO_APICs(void) continue; printk(KERN_DEBUG "IRQ%d ", irq); for_each_irq_pin(entry, cfg->irq_2_pin) - printk("-> %d:%d", entry->apic, entry->pin); - printk("\n"); + pr_cont("-> %d:%d", entry->apic, entry->pin); + pr_cont("\n"); } printk(KERN_INFO ".................................... done.\n"); @@ -1665,9 +1664,9 @@ __apicdebuginit(void) print_APIC_field(int base) printk(KERN_DEBUG); for (i = 0; i < 8; i++) - printk(KERN_CONT "%08x", apic_read(base + i*0x10)); + pr_cont("%08x", apic_read(base + i*0x10)); - printk(KERN_CONT "\n"); + pr_cont("\n"); } __apicdebuginit(void) print_local_APIC(void *dummy) @@ -1769,7 +1768,7 @@ __apicdebuginit(void) print_local_APIC(void *dummy) printk(KERN_DEBUG "... APIC EILVT%d: %08x\n", i, v); } } - printk("\n"); + pr_cont("\n"); } __apicdebuginit(void) print_local_APICs(int maxcpu) @@ -2065,7 +2064,7 @@ void __init setup_ioapic_ids_from_mpc_nocheck(void) reg_00.raw = io_apic_read(ioapic_idx, 0); raw_spin_unlock_irqrestore(&ioapic_lock, flags); if (reg_00.bits.ID != mpc_ioapic_id(ioapic_idx)) - printk("could not set ID!\n"); + pr_cont("could not set ID!\n"); else apic_printk(APIC_VERBOSE, " ok.\n"); } @@ -3563,7 +3562,8 @@ static int __init io_apic_get_unique_id(int ioapic, int apic_id) /* Sanity check */ if (reg_00.bits.ID != apic_id) { - printk("IOAPIC[%d]: Unable to change apic_id!\n", ioapic); + pr_err("IOAPIC[%d]: Unable to change apic_id!\n", + ioapic); return -1; } } -- cgit v1.2.3 From 332afa656e76458ee9cf0f0d123016a0658539e4 Mon Sep 17 00:00:00 2001 From: Suresh Siddha Date: Mon, 21 May 2012 16:58:01 -0700 Subject: x86/irq: Update irq_cfg domain unless the new affinity is a subset of the current domain Until now, irq_cfg domain is mostly static. Either all CPU's (used by flat mode) or one CPU (first CPU in the irq afffinity mask) to which irq is being migrated (this is used by the rest of apic modes). Upcoming x2apic cluster mode optimization patch allows the irq to be sent to any CPU in the x2apic cluster (if supported by the HW). So irq_cfg domain changes on the fly (depending on which CPU in the x2apic cluster is online). Instead of checking for any intersection between the new irq affinity mask and the current irq_cfg domain, check if the new irq affinity mask is a subset of the current irq_cfg domain. Otherwise proceed with updating the irq_cfg domain aswell as assigning vector's on all the CPUs specified in the new mask. This also cleans up a workaround in updating irq_cfg domain for legacy irq's that are handled by the IO-APIC. Signed-off-by: Suresh Siddha Cc: yinghai@kernel.org Cc: gorcunov@openvz.org Cc: agordeev@redhat.com Cc: Linus Torvalds Cc: Andrew Morton Cc: Peter Zijlstra Link: http://lkml.kernel.org/r/1337644682-19854-1-git-send-email-suresh.b.siddha@intel.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/io_apic.c | 15 ++++++--------- 1 file changed, 6 insertions(+), 9 deletions(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index ac96561d1a99..910a3118438b 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1126,8 +1126,7 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) old_vector = cfg->vector; if (old_vector) { cpumask_and(tmp_mask, mask, cpu_online_mask); - cpumask_and(tmp_mask, cfg->domain, tmp_mask); - if (!cpumask_empty(tmp_mask)) { + if (cpumask_subset(tmp_mask, cfg->domain)) { free_cpumask_var(tmp_mask); return 0; } @@ -1141,6 +1140,11 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) apic->vector_allocation_domain(cpu, tmp_mask); + if (cpumask_subset(tmp_mask, cfg->domain)) { + free_cpumask_var(tmp_mask); + return 0; + } + vector = current_vector; offset = current_offset; next: @@ -1346,13 +1350,6 @@ static void setup_ioapic_irq(unsigned int irq, struct irq_cfg *cfg, if (!IO_APIC_IRQ(irq)) return; - /* - * For legacy irqs, cfg->domain starts with cpu 0 for legacy - * controllers like 8259. Now that IO-APIC can handle this irq, update - * the cfg->domain. - */ - if (irq < legacy_pic->nr_legacy_irqs && cpumask_test_cpu(0, cfg->domain)) - apic->vector_allocation_domain(0, cfg->domain); if (assign_irq_vector(irq, cfg, apic->target_cpus())) return; -- cgit v1.2.3 From 49d0c7a0a425a89190b7c3b1445faba9eb227bec Mon Sep 17 00:00:00 2001 From: Alexander Gordeev Date: Tue, 5 Jun 2012 13:23:15 +0200 Subject: x86/apic: Trivial whitespace fixes Signed-off-by: Alexander Gordeev Cc: Suresh Siddha Cc: Yinghai Lu Link: http://lkml.kernel.org/r/20120605112310.GA11443@dhcp-26-207.brq.redhat.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/io_apic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 910a3118438b..74c569791e75 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1363,7 +1363,7 @@ static void setup_ioapic_irq(unsigned int irq, struct irq_cfg *cfg, cfg->vector, irq, attr->trigger, attr->polarity, dest); if (setup_ioapic_entry(irq, &entry, dest, cfg->vector, attr)) { - pr_warn("Failed to setup ioapic entry for ioapic %d, pin %d\n", + pr_warn("Failed to setup ioapic entry for ioapic %d, pin %d\n", mpc_ioapic_id(attr->ioapic), attr->ioapic_pin); __clear_irq_vector(irq, cfg); @@ -1466,7 +1466,7 @@ void setup_IO_APIC_irq_extra(u32 gsi) * Set up the timer pin, possibly with the 8259A-master behind. */ static void __init setup_timer_IRQ0_pin(unsigned int ioapic_idx, - unsigned int pin, int vector) + unsigned int pin, int vector) { struct IO_APIC_route_entry entry; -- cgit v1.2.3 From 1bccd58bfffc5a677051937b332b71f0686187c1 Mon Sep 17 00:00:00 2001 From: Alexander Gordeev Date: Thu, 7 Jun 2012 15:15:15 +0200 Subject: x86/apic: Try to spread IRQ vectors to different priority levels When assigning a new vector it is primarially done by adding 8 to the previously given out vector number. Hence, two consequently allocated vector numbers would likely fall into the same priority level. Try to spread vector numbers to different priority levels better by changing the step from 8 to 16. Signed-off-by: Alexander Gordeev Acked-by: Suresh Siddha Cc: Yinghai Lu Link: http://lkml.kernel.org/r/20120607131514.GD4759@dhcp-26-207.brq.redhat.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/io_apic.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 74c569791e75..05af3d341aaa 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1112,7 +1112,7 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) * 0x80, because int 0x80 is hm, kind of importantish. ;) */ static int current_vector = FIRST_EXTERNAL_VECTOR + VECTOR_OFFSET_START; - static int current_offset = VECTOR_OFFSET_START % 8; + static int current_offset = VECTOR_OFFSET_START % 16; unsigned int old_vector; int cpu, err; cpumask_var_t tmp_mask; @@ -1148,10 +1148,9 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) vector = current_vector; offset = current_offset; next: - vector += 8; + vector += 16; if (vector >= first_system_vector) { - /* If out of vectors on large boxen, must share them. */ - offset = (offset + 1) % 8; + offset = (offset + 1) % 16; vector = FIRST_EXTERNAL_VECTOR + offset; } if (unlikely(current_vector == vector)) -- cgit v1.2.3 From 8637e38aff14d048b649075114023023a2e80fba Mon Sep 17 00:00:00 2001 From: Alexander Gordeev Date: Thu, 7 Jun 2012 15:15:44 +0200 Subject: x86/apic: Avoid useless scanning thru a cpumask in assign_irq_vector() In case of static vector allocation domains (i.e. flat) if all vector numbers are exhausted, an attempt to assign a new vector will lead to useless scans through all CPUs in the cpumask, even though it is known that each new pass would fail. Make this corner case less painful by letting report whether the vector allocation domain depends on passed arguments or not and stop scanning early. The same could have been achived by introducing a static flag to the apic operations. But let's allow vector_allocation_domain() have more intelligence here and decide dynamically, in case we would need it in the future. Signed-off-by: Alexander Gordeev Acked-by: Suresh Siddha Cc: Yinghai Lu Link: http://lkml.kernel.org/r/20120607131542.GE4759@dhcp-26-207.brq.redhat.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/io_apic.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 05af3d341aaa..4061a7dee5c9 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1137,8 +1137,9 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) for_each_cpu_and(cpu, mask, cpu_online_mask) { int new_cpu; int vector, offset; + bool more_domains; - apic->vector_allocation_domain(cpu, tmp_mask); + more_domains = apic->vector_allocation_domain(cpu, tmp_mask); if (cpumask_subset(tmp_mask, cfg->domain)) { free_cpumask_var(tmp_mask); @@ -1153,8 +1154,13 @@ next: offset = (offset + 1) % 16; vector = FIRST_EXTERNAL_VECTOR + offset; } - if (unlikely(current_vector == vector)) - continue; + + if (unlikely(current_vector == vector)) { + if (more_domains) + continue; + else + break; + } if (test_bit(vector, used_vectors)) goto next; -- cgit v1.2.3 From ff164324123c0fe181d8de7dadcc7b3fbe25f2cf Mon Sep 17 00:00:00 2001 From: Alexander Gordeev Date: Thu, 7 Jun 2012 15:15:59 +0200 Subject: x86/apic: Make cpu_mask_to_apicid() operations return error code Current cpu_mask_to_apicid() and cpu_mask_to_apicid_and() implementations have few shortcomings: 1. A value returned by cpu_mask_to_apicid() is written to hardware registers unconditionally. Should BAD_APICID get ever returned it will be written to a hardware too. But the value of BAD_APICID is not universal across all hardware in all modes and might cause unexpected results, i.e. interrupts might get routed to CPUs that are not configured to receive it. 2. Because the value of BAD_APICID is not universal it is counter- intuitive to return it for a hardware where it does not make sense (i.e. x2apic). 3. cpu_mask_to_apicid_and() operation is thought as an complement to cpu_mask_to_apicid() that only applies a AND mask on top of a cpumask being passed. Yet, as consequence of 18374d8 commit the two operations are inconsistent in that of: cpu_mask_to_apicid() should not get a offline CPU with the cpumask cpu_mask_to_apicid_and() should not fail and return BAD_APICID These limitations are impossible to realize just from looking at the operations prototypes. Most of these shortcomings are resolved by returning a error code instead of BAD_APICID. As the result, faults are reported back early rather than possibilities to cause a unexpected behaviour exist (in case of [1]). The only exception is setup_timer_IRQ0_pin() routine. Although obviously controversial to this fix, its existing behaviour is preserved to not break the fragile check_timer() and would better addressed in a separate fix. Signed-off-by: Alexander Gordeev Acked-by: Suresh Siddha Cc: Yinghai Lu Link: http://lkml.kernel.org/r/20120607131559.GF4759@dhcp-26-207.brq.redhat.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/io_apic.c | 88 +++++++++++++++++++++++++++--------------- 1 file changed, 57 insertions(+), 31 deletions(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 4061a7dee5c9..0deb773404e5 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1359,7 +1359,14 @@ static void setup_ioapic_irq(unsigned int irq, struct irq_cfg *cfg, if (assign_irq_vector(irq, cfg, apic->target_cpus())) return; - dest = apic->cpu_mask_to_apicid_and(cfg->domain, apic->target_cpus()); + if (apic->cpu_mask_to_apicid_and(cfg->domain, apic->target_cpus(), + &dest)) { + pr_warn("Failed to obtain apicid for ioapic %d, pin %d\n", + mpc_ioapic_id(attr->ioapic), attr->ioapic_pin); + __clear_irq_vector(irq, cfg); + + return; + } apic_printk(APIC_VERBOSE,KERN_DEBUG "IOAPIC[%d]: Set routing entry (%d-%d -> 0x%x -> " @@ -1474,6 +1481,7 @@ static void __init setup_timer_IRQ0_pin(unsigned int ioapic_idx, unsigned int pin, int vector) { struct IO_APIC_route_entry entry; + unsigned int dest; if (irq_remapping_enabled) return; @@ -1484,9 +1492,12 @@ static void __init setup_timer_IRQ0_pin(unsigned int ioapic_idx, * We use logical delivery to get the timer IRQ * to the first CPU. */ + if (unlikely(apic->cpu_mask_to_apicid(apic->target_cpus(), &dest))) + dest = BAD_APICID; + entry.dest_mode = apic->irq_dest_mode; entry.mask = 0; /* don't mask IRQ for edge */ - entry.dest = apic->cpu_mask_to_apicid(apic->target_cpus()); + entry.dest = dest; entry.delivery_mode = apic->irq_delivery_mode; entry.polarity = 0; entry.trigger = 0; @@ -2245,16 +2256,25 @@ int __ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask, unsigned int *dest_id) { struct irq_cfg *cfg = data->chip_data; + unsigned int irq = data->irq; + int err; if (!cpumask_intersects(mask, cpu_online_mask)) - return -1; + return -EINVAL; - if (assign_irq_vector(data->irq, data->chip_data, mask)) - return -1; + err = assign_irq_vector(irq, cfg, mask); + if (err) + return err; + + err = apic->cpu_mask_to_apicid_and(mask, cfg->domain, dest_id); + if (err) { + if (assign_irq_vector(irq, cfg, data->affinity)) + pr_err("Failed to recover vector for irq %d\n", irq); + return err; + } cpumask_copy(data->affinity, mask); - *dest_id = apic->cpu_mask_to_apicid_and(mask, cfg->domain); return 0; } @@ -3040,7 +3060,10 @@ static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, if (err) return err; - dest = apic->cpu_mask_to_apicid_and(cfg->domain, apic->target_cpus()); + err = apic->cpu_mask_to_apicid_and(cfg->domain, + apic->target_cpus(), &dest); + if (err) + return err; if (irq_remapped(cfg)) { compose_remapped_msi_msg(pdev, irq, dest, msg, hpet_id); @@ -3361,6 +3384,8 @@ static struct irq_chip ht_irq_chip = { int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev) { struct irq_cfg *cfg; + struct ht_irq_msg msg; + unsigned dest; int err; if (disable_apic) @@ -3368,36 +3393,37 @@ int arch_setup_ht_irq(unsigned int irq, struct pci_dev *dev) cfg = irq_cfg(irq); err = assign_irq_vector(irq, cfg, apic->target_cpus()); - if (!err) { - struct ht_irq_msg msg; - unsigned dest; + if (err) + return err; - dest = apic->cpu_mask_to_apicid_and(cfg->domain, - apic->target_cpus()); + err = apic->cpu_mask_to_apicid_and(cfg->domain, + apic->target_cpus(), &dest); + if (err) + return err; - msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest); + msg.address_hi = HT_IRQ_HIGH_DEST_ID(dest); - msg.address_lo = - HT_IRQ_LOW_BASE | - HT_IRQ_LOW_DEST_ID(dest) | - HT_IRQ_LOW_VECTOR(cfg->vector) | - ((apic->irq_dest_mode == 0) ? - HT_IRQ_LOW_DM_PHYSICAL : - HT_IRQ_LOW_DM_LOGICAL) | - HT_IRQ_LOW_RQEOI_EDGE | - ((apic->irq_delivery_mode != dest_LowestPrio) ? - HT_IRQ_LOW_MT_FIXED : - HT_IRQ_LOW_MT_ARBITRATED) | - HT_IRQ_LOW_IRQ_MASKED; + msg.address_lo = + HT_IRQ_LOW_BASE | + HT_IRQ_LOW_DEST_ID(dest) | + HT_IRQ_LOW_VECTOR(cfg->vector) | + ((apic->irq_dest_mode == 0) ? + HT_IRQ_LOW_DM_PHYSICAL : + HT_IRQ_LOW_DM_LOGICAL) | + HT_IRQ_LOW_RQEOI_EDGE | + ((apic->irq_delivery_mode != dest_LowestPrio) ? + HT_IRQ_LOW_MT_FIXED : + HT_IRQ_LOW_MT_ARBITRATED) | + HT_IRQ_LOW_IRQ_MASKED; - write_ht_irq_msg(irq, &msg); + write_ht_irq_msg(irq, &msg); - irq_set_chip_and_handler_name(irq, &ht_irq_chip, - handle_edge_irq, "edge"); + irq_set_chip_and_handler_name(irq, &ht_irq_chip, + handle_edge_irq, "edge"); - dev_printk(KERN_DEBUG, &dev->dev, "irq %d for HT\n", irq); - } - return err; + dev_printk(KERN_DEBUG, &dev->dev, "irq %d for HT\n", irq); + + return 0; } #endif /* CONFIG_HT_IRQ */ -- cgit v1.2.3 From a5a391561bc25898ba1a702a0c4b028aa5b11ce9 Mon Sep 17 00:00:00 2001 From: Alexander Gordeev Date: Thu, 14 Jun 2012 09:49:35 +0200 Subject: x86/apic: Eliminate cpu_mask_to_apicid() operation Since there are only two locations where cpu_mask_to_apicid() is called from, remove the operation and use only cpu_mask_to_apicid_and() instead. Signed-off-by: Alexander Gordeev Suggested-and-acked-by: Suresh Siddha Acked-by: Yinghai Lu Link: http://lkml.kernel.org/r/20120614074935.GE3383@dhcp-26-207.brq.redhat.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/io_apic.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 0deb773404e5..0540f083f452 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1492,7 +1492,8 @@ static void __init setup_timer_IRQ0_pin(unsigned int ioapic_idx, * We use logical delivery to get the timer IRQ * to the first CPU. */ - if (unlikely(apic->cpu_mask_to_apicid(apic->target_cpus(), &dest))) + if (unlikely(apic->cpu_mask_to_apicid_and(apic->target_cpus(), + apic->target_cpus(), &dest))) dest = BAD_APICID; entry.dest_mode = apic->irq_dest_mode; -- cgit v1.2.3 From 7eb9ae0799b1e9f0b77733b432bc5f6f055b020b Mon Sep 17 00:00:00 2001 From: Suresh Siddha Date: Thu, 14 Jun 2012 18:28:49 -0700 Subject: irq/apic: Use config_enabled(CONFIG_SMP) checks to clean up irq_set_affinity() for UP Move the ->irq_set_affinity() routines out of the #ifdef CONFIG_SMP sections and use config_enabled(CONFIG_SMP) checks inside those routines. Thus making those routines simple null stubs for !CONFIG_SMP and retaining those routines with no additional runtime overhead for CONFIG_SMP kernels. Cleans up the ifdef CONFIG_SMP in and around routines related to irq_set_affinity in io_apic and irq_remapping subsystems. Signed-off-by: Suresh Siddha Cc: torvalds@linux-foundation.org Cc: joerg.roedel@amd.com Cc: Sam Ravnborg Cc: Paul Gortmaker Link: http://lkml.kernel.org/r/1339723729.3475.63.camel@sbsiddha-desk.sc.intel.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/io_apic.c | 180 +++++++++++++++++++---------------------- 1 file changed, 81 insertions(+), 99 deletions(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 7cbd397884f5..a951ef7decb1 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -2224,81 +2224,6 @@ void send_cleanup_vector(struct irq_cfg *cfg) cfg->move_in_progress = 0; } -static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq_cfg *cfg) -{ - int apic, pin; - struct irq_pin_list *entry; - u8 vector = cfg->vector; - - for_each_irq_pin(entry, cfg->irq_2_pin) { - unsigned int reg; - - apic = entry->apic; - pin = entry->pin; - /* - * With interrupt-remapping, destination information comes - * from interrupt-remapping table entry. - */ - if (!irq_remapped(cfg)) - io_apic_write(apic, 0x11 + pin*2, dest); - reg = io_apic_read(apic, 0x10 + pin*2); - reg &= ~IO_APIC_REDIR_VECTOR_MASK; - reg |= vector; - io_apic_modify(apic, 0x10 + pin*2, reg); - } -} - -/* - * Either sets data->affinity to a valid value, and returns - * ->cpu_mask_to_apicid of that in dest_id, or returns -1 and - * leaves data->affinity untouched. - */ -int __ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask, - unsigned int *dest_id) -{ - struct irq_cfg *cfg = data->chip_data; - unsigned int irq = data->irq; - int err; - - if (!cpumask_intersects(mask, cpu_online_mask)) - return -EINVAL; - - err = assign_irq_vector(irq, cfg, mask); - if (err) - return err; - - err = apic->cpu_mask_to_apicid_and(mask, cfg->domain, dest_id); - if (err) { - if (assign_irq_vector(irq, cfg, data->affinity)) - pr_err("Failed to recover vector for irq %d\n", irq); - return err; - } - - cpumask_copy(data->affinity, mask); - - return 0; -} - -static int -ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask, - bool force) -{ - unsigned int dest, irq = data->irq; - unsigned long flags; - int ret; - - raw_spin_lock_irqsave(&ioapic_lock, flags); - ret = __ioapic_set_affinity(data, mask, &dest); - if (!ret) { - /* Only the high 8 bits are valid. */ - dest = SET_APIC_LOGICAL_ID(dest); - __target_IO_APIC_irq(irq, dest, data->chip_data); - ret = IRQ_SET_MASK_OK_NOCOPY; - } - raw_spin_unlock_irqrestore(&ioapic_lock, flags); - return ret; -} - asmlinkage void smp_irq_move_cleanup_interrupt(void) { unsigned vector, me; @@ -2386,6 +2311,87 @@ void irq_force_complete_move(int irq) static inline void irq_complete_move(struct irq_cfg *cfg) { } #endif +static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq_cfg *cfg) +{ + int apic, pin; + struct irq_pin_list *entry; + u8 vector = cfg->vector; + + for_each_irq_pin(entry, cfg->irq_2_pin) { + unsigned int reg; + + apic = entry->apic; + pin = entry->pin; + /* + * With interrupt-remapping, destination information comes + * from interrupt-remapping table entry. + */ + if (!irq_remapped(cfg)) + io_apic_write(apic, 0x11 + pin*2, dest); + reg = io_apic_read(apic, 0x10 + pin*2); + reg &= ~IO_APIC_REDIR_VECTOR_MASK; + reg |= vector; + io_apic_modify(apic, 0x10 + pin*2, reg); + } +} + +/* + * Either sets data->affinity to a valid value, and returns + * ->cpu_mask_to_apicid of that in dest_id, or returns -1 and + * leaves data->affinity untouched. + */ +int __ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask, + unsigned int *dest_id) +{ + struct irq_cfg *cfg = data->chip_data; + unsigned int irq = data->irq; + int err; + + if (!config_enabled(CONFIG_SMP)) + return -1; + + if (!cpumask_intersects(mask, cpu_online_mask)) + return -EINVAL; + + err = assign_irq_vector(irq, cfg, mask); + if (err) + return err; + + err = apic->cpu_mask_to_apicid_and(mask, cfg->domain, dest_id); + if (err) { + if (assign_irq_vector(irq, cfg, data->affinity)) + pr_err("Failed to recover vector for irq %d\n", irq); + return err; + } + + cpumask_copy(data->affinity, mask); + + return 0; +} + +static int +ioapic_set_affinity(struct irq_data *data, const struct cpumask *mask, + bool force) +{ + unsigned int dest, irq = data->irq; + unsigned long flags; + int ret; + + if (!config_enabled(CONFIG_SMP)) + return -1; + + raw_spin_lock_irqsave(&ioapic_lock, flags); + ret = __ioapic_set_affinity(data, mask, &dest); + if (!ret) { + /* Only the high 8 bits are valid. */ + dest = SET_APIC_LOGICAL_ID(dest); + __target_IO_APIC_irq(irq, dest, data->chip_data); + ret = IRQ_SET_MASK_OK_NOCOPY; + } + raw_spin_unlock_irqrestore(&ioapic_lock, flags); + return ret; +} + static void ack_apic_edge(struct irq_data *data) { irq_complete_move(data->chip_data); @@ -2565,9 +2571,7 @@ static void irq_remap_modify_chip_defaults(struct irq_chip *chip) chip->irq_ack = ir_ack_apic_edge; chip->irq_eoi = ir_ack_apic_level; -#ifdef CONFIG_SMP chip->irq_set_affinity = set_remapped_irq_affinity; -#endif } #endif /* CONFIG_IRQ_REMAP */ @@ -2578,9 +2582,7 @@ static struct irq_chip ioapic_chip __read_mostly = { .irq_unmask = unmask_ioapic_irq, .irq_ack = ack_apic_edge, .irq_eoi = ack_apic_level, -#ifdef CONFIG_SMP .irq_set_affinity = ioapic_set_affinity, -#endif .irq_retrigger = ioapic_retrigger_irq, }; @@ -3099,7 +3101,6 @@ static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, return err; } -#ifdef CONFIG_SMP static int msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) { @@ -3121,7 +3122,6 @@ msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) return IRQ_SET_MASK_OK_NOCOPY; } -#endif /* CONFIG_SMP */ /* * IRQ Chip for MSI PCI/PCI-X/PCI-Express Devices, @@ -3132,9 +3132,7 @@ static struct irq_chip msi_chip = { .irq_unmask = unmask_msi_irq, .irq_mask = mask_msi_irq, .irq_ack = ack_apic_edge, -#ifdef CONFIG_SMP .irq_set_affinity = msi_set_affinity, -#endif .irq_retrigger = ioapic_retrigger_irq, }; @@ -3219,7 +3217,6 @@ void native_teardown_msi_irq(unsigned int irq) } #ifdef CONFIG_DMAR_TABLE -#ifdef CONFIG_SMP static int dmar_msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) @@ -3244,16 +3241,12 @@ dmar_msi_set_affinity(struct irq_data *data, const struct cpumask *mask, return IRQ_SET_MASK_OK_NOCOPY; } -#endif /* CONFIG_SMP */ - static struct irq_chip dmar_msi_type = { .name = "DMAR_MSI", .irq_unmask = dmar_msi_unmask, .irq_mask = dmar_msi_mask, .irq_ack = ack_apic_edge, -#ifdef CONFIG_SMP .irq_set_affinity = dmar_msi_set_affinity, -#endif .irq_retrigger = ioapic_retrigger_irq, }; @@ -3274,7 +3267,6 @@ int arch_setup_dmar_msi(unsigned int irq) #ifdef CONFIG_HPET_TIMER -#ifdef CONFIG_SMP static int hpet_msi_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) { @@ -3297,16 +3289,12 @@ static int hpet_msi_set_affinity(struct irq_data *data, return IRQ_SET_MASK_OK_NOCOPY; } -#endif /* CONFIG_SMP */ - static struct irq_chip hpet_msi_type = { .name = "HPET_MSI", .irq_unmask = hpet_msi_unmask, .irq_mask = hpet_msi_mask, .irq_ack = ack_apic_edge, -#ifdef CONFIG_SMP .irq_set_affinity = hpet_msi_set_affinity, -#endif .irq_retrigger = ioapic_retrigger_irq, }; @@ -3341,8 +3329,6 @@ int arch_setup_hpet_msi(unsigned int irq, unsigned int id) */ #ifdef CONFIG_HT_IRQ -#ifdef CONFIG_SMP - static void target_ht_irq(unsigned int irq, unsigned int dest, u8 vector) { struct ht_irq_msg msg; @@ -3370,16 +3356,12 @@ ht_set_affinity(struct irq_data *data, const struct cpumask *mask, bool force) return IRQ_SET_MASK_OK_NOCOPY; } -#endif - static struct irq_chip ht_irq_chip = { .name = "PCI-HT", .irq_mask = mask_ht_irq, .irq_unmask = unmask_ht_irq, .irq_ack = ack_apic_edge, -#ifdef CONFIG_SMP .irq_set_affinity = ht_set_affinity, -#endif .irq_retrigger = ioapic_retrigger_irq, }; -- cgit v1.2.3 From b39f25a849d7677a7dbf183f2483fd41c201a5ce Mon Sep 17 00:00:00 2001 From: Suresh Siddha Date: Mon, 25 Jun 2012 13:38:27 -0700 Subject: x86/apic: Optimize cpu traversal in __assign_irq_vector() using domain membership Currently __assign_irq_vector() goes through each cpu in the specified mask until it finds a free vector in all the cpu's that are part of the same interrupt domain. We visit all the interrupt domain sibling cpus to reserve the free vector. So, when we fail to find a free vector in an interrupt domain, it is safe to continue our search with a cpu belonging to a new interrupt domain. No need to go through each cpu, if the domain containing that cpu is already visited. Use the irq_cfg's old_domain to track the visited domains and optimize the cpu traversal while finding a free vector in the given cpumask. NOTE: We can also optimize the search by using for_each_cpu() and skip the current cpu, if it is not the first cpu in the mask returned by the vector_allocation_domain(). But re-using the cfg->old_domain to track the visited domains will be slightly faster. Signed-off-by: Suresh Siddha Acked-by: Yinghai Lu Acked-by: Alexander Gordeev Acked-by: Cyrill Gorcunov Link: http://lkml.kernel.org/r/1340656709-11423-2-git-send-email-suresh.b.siddha@intel.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/io_apic.c | 15 ++++++++------- 1 file changed, 8 insertions(+), 7 deletions(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index a951ef7decb1..8a08f09aa505 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1134,12 +1134,13 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) /* Only try and allocate irqs on cpus that are present */ err = -ENOSPC; - for_each_cpu_and(cpu, mask, cpu_online_mask) { + cpumask_clear(cfg->old_domain); + cpu = cpumask_first_and(mask, cpu_online_mask); + while (cpu < nr_cpu_ids) { int new_cpu; int vector, offset; - bool more_domains; - more_domains = apic->vector_allocation_domain(cpu, tmp_mask); + apic->vector_allocation_domain(cpu, tmp_mask); if (cpumask_subset(tmp_mask, cfg->domain)) { free_cpumask_var(tmp_mask); @@ -1156,10 +1157,10 @@ next: } if (unlikely(current_vector == vector)) { - if (more_domains) - continue; - else - break; + cpumask_or(cfg->old_domain, cfg->old_domain, tmp_mask); + cpumask_andnot(tmp_mask, mask, cfg->old_domain); + cpu = cpumask_first_and(tmp_mask, cpu_online_mask); + continue; } if (test_bit(vector, used_vectors)) -- cgit v1.2.3 From 1ac322d0b169c95ce34d55b3ed6d40ce1a5f3a02 Mon Sep 17 00:00:00 2001 From: Suresh Siddha Date: Mon, 25 Jun 2012 13:38:28 -0700 Subject: x86/apic/x2apic: Limit the vector reservation to the user specified mask For the x2apic cluster mode, vector for an interrupt is currently reserved on all the cpu's that are part of the x2apic cluster. But the interrupts will be routed only to the cluster (derived from the first cpu in the mask) members specified in the mask. So there is no need to reserve the vector in the unused cluster members. Modify __assign_irq_vector() to reserve the vectors based on the user specified irq destination mask. If the new mask is a proper subset of the currently used mask, cleanup the vector allocation on the unused cpu members. Also, allow the apic driver to tune the vector domain based on the affinity mask (which in most cases is the user-specified mask). Signed-off-by: Suresh Siddha Acked-by: Yinghai Lu Acked-by: Alexander Gordeev Acked-by: Cyrill Gorcunov Link: http://lkml.kernel.org/r/1340656709-11423-3-git-send-email-suresh.b.siddha@intel.com Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/io_apic.c | 31 +++++++++++++++---------------- 1 file changed, 15 insertions(+), 16 deletions(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 8a08f09aa505..9684f963befe 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1113,7 +1113,6 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) */ static int current_vector = FIRST_EXTERNAL_VECTOR + VECTOR_OFFSET_START; static int current_offset = VECTOR_OFFSET_START % 16; - unsigned int old_vector; int cpu, err; cpumask_var_t tmp_mask; @@ -1123,28 +1122,28 @@ __assign_irq_vector(int irq, struct irq_cfg *cfg, const struct cpumask *mask) if (!alloc_cpumask_var(&tmp_mask, GFP_ATOMIC)) return -ENOMEM; - old_vector = cfg->vector; - if (old_vector) { - cpumask_and(tmp_mask, mask, cpu_online_mask); - if (cpumask_subset(tmp_mask, cfg->domain)) { - free_cpumask_var(tmp_mask); - return 0; - } - } - /* Only try and allocate irqs on cpus that are present */ err = -ENOSPC; cpumask_clear(cfg->old_domain); cpu = cpumask_first_and(mask, cpu_online_mask); while (cpu < nr_cpu_ids) { - int new_cpu; - int vector, offset; + int new_cpu, vector, offset; - apic->vector_allocation_domain(cpu, tmp_mask); + apic->vector_allocation_domain(cpu, tmp_mask, mask); if (cpumask_subset(tmp_mask, cfg->domain)) { - free_cpumask_var(tmp_mask); - return 0; + err = 0; + if (cpumask_equal(tmp_mask, cfg->domain)) + break; + /* + * New cpumask using the vector is a proper subset of + * the current in use mask. So cleanup the vector + * allocation for the members that are not used anymore. + */ + cpumask_andnot(cfg->old_domain, cfg->domain, tmp_mask); + cfg->move_in_progress = 1; + cpumask_and(cfg->domain, cfg->domain, tmp_mask); + break; } vector = current_vector; @@ -1172,7 +1171,7 @@ next: /* Found one! */ current_vector = vector; current_offset = offset; - if (old_vector) { + if (cfg->vector) { cfg->move_in_progress = 1; cpumask_copy(cfg->old_domain, cfg->domain); } -- cgit v1.2.3 From 1d44b30f35a9873a65b320dd5300088fa995fd94 Mon Sep 17 00:00:00 2001 From: Tomoki Sekiyama Date: Thu, 26 Jul 2012 19:47:32 +0900 Subject: x86/ioapic: Fix NULL pointer dereference on CPU hotplug after disabling irqs In the current kernel, percpu variable `vector_irq' is not always cleared when a CPU is offlined. If the CPU that has the disabled irqs in vector_irq is hotplugged again, __setup_vector_irq() hits invalid irq vector and may crash. This bug can be reproduced as following; # echo 0 > /sys/devices/system/cpu/cpu7/online # modprobe -r some_driver_using_interrupts # vector_irq@cpu7 uncleared # echo 1 > /sys/devices/system/cpu/cpu7/online # kernel may crash To fix this problem, this patch clears vector_irq in __fixup_irqs() when the CPU is offlined. This also reverts commit f6175f5bfb4c, which partially fixes this bug by clearing vector in __clear_irq_vector(). But in environments with IOMMU IRQ remapper, it could fail because cfg->domain doesn't contain offlined CPUs. With this patch, the fix in __clear_irq_vector() can be reverted because every vector_irq is already cleared in __fixup_irqs() on offlined CPUs. Signed-off-by: Tomoki Sekiyama Acked-by: Suresh Siddha Cc: yrl.pp-manager.tt@hitachi.com Cc: Yinghai Lu Cc: Alexander Gordeev Link: http://lkml.kernel.org/r/20120726104732.2889.19144.stgit@kvmdev Signed-off-by: Ingo Molnar --- arch/x86/kernel/apic/io_apic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/x86/kernel/apic/io_apic.c') diff --git a/arch/x86/kernel/apic/io_apic.c b/arch/x86/kernel/apic/io_apic.c index 406eee784684..a6c64aaddf9a 100644 --- a/arch/x86/kernel/apic/io_apic.c +++ b/arch/x86/kernel/apic/io_apic.c @@ -1204,7 +1204,7 @@ static void __clear_irq_vector(int irq, struct irq_cfg *cfg) BUG_ON(!cfg->vector); vector = cfg->vector; - for_each_cpu(cpu, cfg->domain) + for_each_cpu_and(cpu, cfg->domain, cpu_online_mask) per_cpu(vector_irq, cpu)[vector] = -1; cfg->vector = 0; @@ -1212,7 +1212,7 @@ static void __clear_irq_vector(int irq, struct irq_cfg *cfg) if (likely(!cfg->move_in_progress)) return; - for_each_cpu(cpu, cfg->old_domain) { + for_each_cpu_and(cpu, cfg->old_domain, cpu_online_mask) { for (vector = FIRST_EXTERNAL_VECTOR; vector < NR_VECTORS; vector++) { if (per_cpu(vector_irq, cpu)[vector] != irq) -- cgit v1.2.3