iommu/amd: Enable support for up to 2K interrupts per function

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AMD IOMMU optionally supports up to 2K interrupts per function on newer
platforms. Support for this feature is indicated through Extended
Feature 2 Register (MMIO Offset 01A0h[NumIntRemapSup]). Allocate 2K IRTEs
per device when this support is available.

Co-developed-by: Sairaj Kodilkar <sarunkod@amd.com>
Signed-off-by: Sairaj Kodilkar <sarunkod@amd.com>
Signed-off-by: Kishon Vijay Abraham I <kvijayab@amd.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Link: https://lore.kernel.org/r/20250307095822.2274-5-sarunkod@amd.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>

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Kishon Vijay Abraham I 2025-03-07 15:28:22 +05:30 • committed by Joerg Roedel

parent 950865c1b8

commit 19e5cc156c

3 changed files with 65 additions and 14 deletions

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15

drivers/iommu/amd/amd_iommu_types.h

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16

drivers/iommu/amd/init.c

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48

drivers/iommu/amd/iommu.c

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