Commit fdc39b77 authored by Vasant Hegde's avatar Vasant Hegde Committed by Joerg Roedel
Browse files

iommu/amd: Update event log pointer as soon as processing is complete 



Update event buffer head pointer once driver completes processing. So
that IOMMU can write new log without waiting for driver to complete
processing all event logs.

Signed-off-by: default avatarVasant Hegde <vasant.hegde@amd.com>
Reviewed-by: default avatarSuravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Link: https://lore.kernel.org/r/20240828111029.5429-2-vasant.hegde@amd.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 014e7562

drivers/iommu/amd/iommu.c

+3 −1
Original line number Diff line number Diff line
@@ -825,10 +825,12 @@ static void iommu_poll_events(struct amd_iommu *iommu) 


	while (head != tail) {

		iommu_print_event(iommu, iommu->evt_buf + head);



		/* Update head pointer of hardware ring-buffer */

		head = (head + EVENT_ENTRY_SIZE) % EVT_BUFFER_SIZE;

		writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET);

	}



	writel(head, iommu->mmio_base + MMIO_EVT_HEAD_OFFSET);

}



#ifdef CONFIG_IRQ_REMAP