irqchip/gicv3: Workaround for Cavium ThunderX erratum 23154

This patch implements Cavium ThunderX erratum 23154.

The gicv3 of ThunderX requires a modified version for reading the IAR
status to ensure data synchronization. Since this is in the fast-path
and called with each interrupt, runtime patching is used using jump
label patching for smallest overhead (no-op). This is the same
technique as used for tracepoints.

Signed-off-by: Robert Richter <[email protected]>
Reviewed-by: Marc Zygnier <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Cc: Tirumalesh Chalamarla <[email protected]>
Cc: [email protected]
Cc: Jason Cooper <[email protected]>
Cc: Will Deacon <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Thomas Gleixner <[email protected]>

0 files changed, 0 insertions, 0 deletions