search for: is_builtin

...(1 << ACPI_IORT_NODE_SMMU_V3)) + (1 << ACPI_IORT_NODE_SMMU_V3) | \ + (1 << ACPI_IORT_NODE_PARAVIRT)) /* Until ACPICA headers cover IORT rev. C */ #ifndef ACPI_IORT_SMMU_V3_CAVIUM_CN99XX @@ -616,6 +617,8 @@ static inline bool iort_iommu_driver_enabled(u8 type) return IS_BUILTIN(CONFIG_ARM_SMMU_V3); case ACPI_IORT_NODE_SMMU: return IS_BUILTIN(CONFIG_ARM_SMMU); + case ACPI_IORT_NODE_PARAVIRT: + return IS_BUILTIN(CONFIG_VIRTIO_IOMMU); default: pr_warn("IORT node type %u does not describe an SMMU\n", type); return false; @@ -1062,6 +1065,48 @@ static b...

...ine queued_spin_is_locked queued_spin_is_locked > +#define queued_spin_unlock_wait queued_spin_unlock_wait > + > +extern void queued_spin_unlock_wait(struct qspinlock *lock); > + > +static inline u8 *__qspinlock_lock_byte(struct qspinlock *lock) > +{ > + return (u8 *)lock + 3 * IS_BUILTIN(CONFIG_CPU_BIG_ENDIAN); > +} > + > +static inline void queued_spin_unlock(struct qspinlock *lock) > +{ > + /* release semantics is required */ > + smp_store_release(__qspinlock_lock_byte(lock), 0); > +} > + > +static inline int queued_spin_is_locked(struct qspinlock *lock...

...ine queued_spin_is_locked queued_spin_is_locked > +#define queued_spin_unlock_wait queued_spin_unlock_wait > + > +extern void queued_spin_unlock_wait(struct qspinlock *lock); > + > +static inline u8 *__qspinlock_lock_byte(struct qspinlock *lock) > +{ > + return (u8 *)lock + 3 * IS_BUILTIN(CONFIG_CPU_BIG_ENDIAN); > +} > + > +static inline void queued_spin_unlock(struct qspinlock *lock) > +{ > + /* release semantics is required */ > + smp_store_release(__qspinlock_lock_byte(lock), 0); > +} > + > +static inline int queued_spin_is_locked(struct qspinlock *lock...

...each_entry_safe(curr, tmp, &iort_fwnode_list, list) { if (curr->iort_node == node) { + kfree(curr->pci_devid); list_del(&curr->list); kfree(curr); break; @@ -870,6 +882,7 @@ static inline bool iort_iommu_driver_enabled(u8 type) case ACPI_IORT_NODE_SMMU: return IS_BUILTIN(CONFIG_ARM_SMMU); case ACPI_VIOT_IORT_NODE_VIRTIO_MMIO_IOMMU: + case ACPI_VIOT_IORT_NODE_VIRTIO_PCI_IOMMU: return IS_ENABLED(CONFIG_VIRTIO_IOMMU); default: pr_warn("IORT node type %u does not describe an IOMMU\n", type); @@ -1451,6 +1464,28 @@ static void __init viommu_mmio_dma_...

I'm seeking feedback on multi-platform support for virtio-iommu. At the moment only devicetree (DT) is supported and we don't have a pleasant solution for other platforms. Once we figure out the topology description, x86 support is trivial. Since the IOMMU manages memory accesses from other devices, the guest kernel needs to initialize the IOMMU before endpoints start issuing DMA.

I'm seeking feedback on multi-platform support for virtio-iommu. At the moment only devicetree (DT) is supported and we don't have a pleasant solution for other platforms. Once we figure out the topology description, x86 support is trivial. Since the IOMMU manages memory accesses from other devices, the guest kernel needs to initialize the IOMMU before endpoints start issuing DMA.

...pin_unlock queued_spin_unlock +#define queued_spin_is_locked queued_spin_is_locked +#define queued_spin_unlock_wait queued_spin_unlock_wait + +extern void queued_spin_unlock_wait(struct qspinlock *lock); + +static inline u8 *__qspinlock_lock_byte(struct qspinlock *lock) +{ + return (u8 *)lock + 3 * IS_BUILTIN(CONFIG_CPU_BIG_ENDIAN); +} + +static inline void queued_spin_unlock(struct qspinlock *lock) +{ + /* release semantics is required */ + smp_store_release(__qspinlock_lock_byte(lock), 0); +} + +static inline int queued_spin_is_locked(struct qspinlock *lock) +{ + smp_mb(); + return atomic_read(&lo...

Hi All, this is the fairlock patchset. You can apply them and build successfully. patches are based on linux-next qspinlock can avoid waiter starved issue. It has about the same speed in single-thread and it can be much faster in high contention situations especially when the spinlock is embedded within the data structure to be protected. v7 -> v8: add one patch to drop a function call

Hi All, this is the fairlock patchset. You can apply them and build successfully. patches are based on linux-next qspinlock can avoid waiter starved issue. It has about the same speed in single-thread and it can be much faster in high contention situations especially when the spinlock is embedded within the data structure to be protected. v7 -> v8: add one patch to drop a function call

Hi All, this is the fairlock patchset. You can apply them and build successfully. patches are based on linux-next qspinlock can avoid waiter starved issue. It has about the same speed in single-thread and it can be much faster in high contention situations especially when the spinlock is embedded within the data structure to be protected. v8 -> v9: mv qspinlocm config entry to

Hi All, this is the fairlock patchset. You can apply them and build successfully. patches are based on linux-next qspinlock can avoid waiter starved issue. It has about the same speed in single-thread and it can be much faster in high contention situations especially when the spinlock is embedded within the data structure to be protected. v8 -> v9: mv qspinlocm config entry to

Implement the virtio-iommu driver following version 0.5 of the specification [1]. Previous version of this code was sent back in April [2], implementing the first public RFC. Since then there has been lots of progress and discussion on the specification side, and I think the driver is in a good shape now. The reason patches 1-3 are only RFC is that I'm waiting on feedback from the Virtio TC

Implement the virtio-iommu driver following version 0.5 of the specification [1]. Previous version of this code was sent back in April [2], implementing the first public RFC. Since then there has been lots of progress and discussion on the specification side, and I think the driver is in a good shape now. The reason patches 1-3 are only RFC is that I'm waiting on feedback from the Virtio TC