diff options
| author | Dimitri Sivanich <sivanich@hpe.com> | 2024-04-24 15:16:29 +0800 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2024-04-26 11:57:36 +0200 |
| commit | d74169ceb0d2e32438946a2f1f9fc8c803304bd6 (patch) | |
| tree | 3c9e7d3d50d317c44291f01c5779f1ec0fab0b08 /drivers/iommu/irq_remapping.c | |
| parent | 9e7ee0f045395dc8aa55fbdc164c062484f4c88d (diff) | |
iommu/vt-d: Allocate DMAR fault interrupts locally
The Intel IOMMU code currently tries to allocate all DMAR fault interrupt
vectors on the boot cpu. On large systems with high DMAR counts this
results in vector exhaustion, and most of the vectors are not initially
allocated socket local.
Instead, have a cpu on each node do the vector allocation for the DMARs on
that node. The boot cpu still does the allocation for its node during its
boot sequence.
Signed-off-by: Dimitri Sivanich <sivanich@hpe.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/Zfydpp2Hm+as16TY@hpe.com
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/irq_remapping.c')
| -rw-r--r-- | drivers/iommu/irq_remapping.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/iommu/irq_remapping.c b/drivers/iommu/irq_remapping.c index ee59647c2050..2f7281ccc05f 100644 --- a/drivers/iommu/irq_remapping.c +++ b/drivers/iommu/irq_remapping.c @@ -151,7 +151,10 @@ int __init irq_remap_enable_fault_handling(void) if (!remap_ops->enable_faulting) return -ENODEV; - return remap_ops->enable_faulting(); + cpuhp_setup_state(CPUHP_AP_ONLINE_DYN, "dmar:enable_fault_handling", + remap_ops->enable_faulting, NULL); + + return remap_ops->enable_faulting(smp_processor_id()); } void panic_if_irq_remap(const char *msg) |