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| author | Shanker Donthineni <[email protected]> | 2023-05-19 13:49:02 +0000 |
|---|---|---|
| committer | Thomas Gleixner <[email protected]> | 2023-05-24 09:39:44 +0000 |
| commit | 721255b9826bd11c7a38b585905fc2dd0fb94e52 (patch) | |
| tree | 2c266db0d16e3708c17e86e3adb6cc644a0d9e4b /drivers/fpga/fpga-region.c | |
| parent | genirq: Encapsulate sparse bitmap handling (diff) | |
| download | kernel-721255b9826bd11c7a38b585905fc2dd0fb94e52.tar.gz kernel-721255b9826bd11c7a38b585905fc2dd0fb94e52.zip | |
genirq: Use a maple tree for interrupt descriptor management
The current implementation uses a static bitmap for interrupt descriptor
allocation and a radix tree to pointer store the pointer for lookup.
However, the size of the bitmap is constrained by the build time macro
MAX_SPARSE_IRQS, which may not be sufficient to support high-end servers,
particularly those with GICv4.1 hardware, which require a large interrupt
space to cover LPIs and vSGIs.
Replace the bitmap and the radix tree with a maple tree, which not only
stores pointers for lookup, but also provides a mechanism to find free
ranges. That removes the build time hardcoded upper limit.
Signed-off-by: Shanker Donthineni <[email protected]>
Signed-off-by: Thomas Gleixner <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Diffstat (limited to 'drivers/fpga/fpga-region.c')
0 files changed, 0 insertions, 0 deletions