search for: in_irq

...addr, guest_cpu_user_regs()); } static int handle_gdt_ldt_mapping_fault( @@ -1034,8 +1047,10 @@ static int fixup_page_fault(unsigned lon struct vcpu *v = current; struct domain *d = v->domain; - /* No fixups in interrupt context or when interrupts are disabled. */ - if ( in_irq() || !(regs->eflags & X86_EFLAGS_IF) ) + /* No fixups in interrupt context, when interrupts are disabled, or + * when a reserved bit was found to be set. */ + if ( in_irq() || !(regs->eflags & X86_EFLAGS_IF) || + (regs->error_code & PFEC_reserved_bit) )...

...,7 @@ xenpfm_context_create(XEN_GUEST_HANDLE(p goto out; /* XXX fmt */ - for_each_cpu(cpu) { + for_each_possible_cpu(cpu) { ctx[cpu] = pfm_context_create(&kreq); if (ctx[cpu] == NULL) { error = -ENOMEM; @@ -7325,20 +7325,20 @@ xenpfm_context_create(XEN_GUEST_HANDLE(p BUG_ON(in_irq()); spin_lock(&xenpfm_context_lock); - for_each_cpu(cpu) { + for_each_possible_cpu(cpu) { if (per_cpu(xenpfm_context, cpu) != NULL) { error = -EBUSY; break; } } - for_each_cpu(cpu) { + for_each_possible_cpu(cpu) { per_cpu(xenpfm_context, cpu) = ctx[cpu]; ctx[cpu] = NULL;...

...le(0) -#endif /* CONFIG_HIGHMEM */ - -#if !defined(CONFIG_KMAP_LOCAL) -#if defined(CONFIG_HIGHMEM) - -DECLARE_PER_CPU(int, __kmap_atomic_idx); - -static inline int kmap_atomic_idx_push(void) -{ - int idx = __this_cpu_inc_return(__kmap_atomic_idx) - 1; - -#ifdef CONFIG_DEBUG_HIGHMEM - WARN_ON_ONCE(in_irq() && !irqs_disabled()); - BUG_ON(idx >= KM_TYPE_NR); -#endif - return idx; -} - -static inline int kmap_atomic_idx(void) -{ - return __this_cpu_read(__kmap_atomic_idx) - 1; -} -static inline void kmap_atomic_idx_pop(void) -{ -#ifdef CONFIG_DEBUG_HIGHMEM - int idx = __this_cpu_dec_retur...

...struct sk_buff_head send; @@ -223,6 +230,20 @@ static void free_old_xmit_skbs(struct virtnet_info *vi) } } +static enum hrtimer_restart kick_xmit(struct hrtimer *t) +{ + struct virtnet_info *vi = container_of(t,struct virtnet_info,tx_timer); + + BUG_ON(!in_softirq()); + BUG_ON(in_irq()); + netif_tx_lock(vi->dev); + vi->svq->vq_ops->kick(vi->svq); + vi->out_num = 0; + netif_tx_unlock(vi->dev); + + return HRTIMER_NORESTART; +} + static int start_xmit(struct sk_buff *skb, struct net_device *dev) { struct virtnet_info *vi = netdev_priv(dev...

...struct sk_buff_head send; @@ -223,6 +230,20 @@ static void free_old_xmit_skbs(struct virtnet_info *vi) } } +static enum hrtimer_restart kick_xmit(struct hrtimer *t) +{ + struct virtnet_info *vi = container_of(t,struct virtnet_info,tx_timer); + + BUG_ON(!in_softirq()); + BUG_ON(in_irq()); + netif_tx_lock(vi->dev); + vi->svq->vq_ops->kick(vi->svq); + vi->out_num = 0; + netif_tx_unlock(vi->dev); + + return HRTIMER_NORESTART; +} + static int start_xmit(struct sk_buff *skb, struct net_device *dev) { struct virtnet_info *vi = netdev_priv(dev...

...lt;ffffffff814b84e3>] ? rest_init+0x67/0x69 [<ffffffff81afcc10>] ? start_kernel+0x387/0x392 [<ffffffff81afc2c8>] ? x86_64_start_reservations+0xb3/0xb7 [<ffffffff81affed2>] ? xen_start_kernel+0x4be/0x4c2 ---[ end trace 755676650ea49003 ]--- The warning is: WARN_ON_ONCE(in_irq() || irqs_disabled()); It seems the basic problem is that xennet_tx_buf_gc() is being called in interrupt context - with smartpoll it''s from the timer interrupt, but even without it is being called from xennet_interrupt(), which in turn calls dev_kfree_skb_irq(). Since this should be...

...gh); -#endif /* CONFIG_HIGHMEM */ +#endif /* CONFIG_HIGHMEM */ + +#ifdef CONFIG_KMAP_LOCAL + +#include <asm/kmap_size.h> + +static DEFINE_PER_CPU(int, __kmap_local_idx); + +static inline int kmap_local_idx_push(void) +{ + int idx = __this_cpu_inc_return(__kmap_local_idx) - 1; + + WARN_ON_ONCE(in_irq() && !irqs_disabled()); + BUG_ON(idx >= KM_MAX_IDX); + return idx; +} + +static inline int kmap_local_idx(void) +{ + return __this_cpu_read(__kmap_local_idx) - 1; +} + +static inline void kmap_local_idx_pop(void) +{ + int idx = __this_cpu_dec_return(__kmap_local_idx); + + BUG_ON(idx <...

...DEBUG_HIGHMEM the stack depth is doubled and every second * slot is unused which acts as a guard page @@ -379,23 +377,21 @@ static DEFINE_PER_CPU(int, __kmap_local_ static inline int kmap_local_idx_push(void) { - int idx = __this_cpu_add_return(__kmap_local_idx, KM_INCR) - 1; - WARN_ON_ONCE(in_irq() && !irqs_disabled()); - BUG_ON(idx >= KM_MAX_IDX); - return idx; + current->kmap_ctrl.idx += KM_INCR; + BUG_ON(current->kmap_ctrl.idx >= KM_TYPE_NR); + return current->kmap_ctrl.idx - 1; } static inline int kmap_local_idx(void) { - return __this_cpu_read(__kmap_local_i...

From: Yang Zhang <yang.z.zhang@Intel.com> The follwoing patches are adding the Posted Interrupt supporting to Xen: Posted Interrupt allows vAPIC interrupts to inject into guest directly without any vmexit. - When delivering a interrupt to guest, if target vcpu is running, update Posted-interrupt requests bitmap and send a notification event to the vcpu. Then the vcpu will handle this

1: correct LDT checks 2: add address validity check to guest_map_l1e() 3: use {rd,wr}{fs,gs}base when available 4: check for canonical address before doing page walks Signed-off-by: Jan Beulich <jbeulich@suse.com>

Following up to the discussion in: https://lore.kernel.org/r/20200914204209.256266093 at linutronix.de and the second version of this: https://lore.kernel.org/r/20201029221806.189523375 at linutronix.de this series provides a preemptible variant of kmap_atomic & related interfaces. This is achieved by: - Removing the RT dependency from migrate_disable/enable() - Consolidating all

Following up to the discussion in: https://lore.kernel.org/r/20200914204209.256266093 at linutronix.de and the second version of this: https://lore.kernel.org/r/20201029221806.189523375 at linutronix.de this series provides a preemptible variant of kmap_atomic & related interfaces. This is achieved by: - Removing the RT dependency from migrate_disable/enable() - Consolidating all

Following up to the discussion in: https://lore.kernel.org/r/20200914204209.256266093 at linutronix.de and the second version of this: https://lore.kernel.org/r/20201029221806.189523375 at linutronix.de this series provides a preemptible variant of kmap_atomic & related interfaces. This is achieved by: - Removing the RT dependency from migrate_disable/enable() - Consolidating all

...all.h> #include <public/sched.h> @@ -552,9 +553,15 @@ static void schedule(void) struct schedule_data *sd; struct task_slice next_slice; s32 r_time; /* time for new dom to run */ + int cpu = smp_processor_id(); ASSERT(!in_irq()); ASSERT(this_cpu(mc_state).flags == 0); + + if (rcu_pending(cpu)) + /* since __enter_scheduler is called from softirq context + * we know we are in a quiescent state */ + rcu_check_callbacks(cpu,1); perfc_incrc(sched_run); @@ -649,6 +656,12 @@ static void...

...all.h> #include <public/sched.h> @@ -552,9 +553,15 @@ static void schedule(void) struct schedule_data *sd; struct task_slice next_slice; s32 r_time; /* time for new dom to run */ + int cpu = smp_processor_id(); ASSERT(!in_irq()); ASSERT(this_cpu(mc_state).flags == 0); + + if (rcu_pending(cpu)) + /* since __enter_scheduler is called from softirq context + * we know we are in a quiescent state */ + rcu_check_callbacks(cpu,1); perfc_incrc(sched_run); @@ -649,6 +656,12 @@ static void...

Hello everyone, this is the fourth version of the patch series that introduces ARMv7 with virtualization extensions support in Xen. The series allows Xen and Dom0 to boot on a Cortex-A15 based Versatile Express simulator. See the following announce email for more informations about what we are trying to achieve, as well as the original git history: See

Hello everyone, this is the very first version of the patch series that introduces ARMv7 with virtualization extensions support in Xen. The series allows Xen and Dom0 to boot on a Cortex-A15 based Versatile Express simulator. See the following announce email for more informations about what we are trying to achieve, as well as the original git history: See