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arm64: Add workaround for Cavium Thunder erratum 30115

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Some Cavium Thunder CPUs suffer a problem where a KVM guest may
inadvertently cause the host kernel to quit receiving interrupts.

Use the Group-0/1 trapping in order to deal with it.

[maz]: Adapted patch to the Group-0/1 trapping, reworked commit log

Tested-by: Alexander Graf <[email protected]>
Acked-by: Catalin Marinas <[email protected]>
Reviewed-by: Eric Auger <[email protected]>
Signed-off-by: David Daney <[email protected]>
Signed-off-by: Marc Zyngier <[email protected]>
Signed-off-by: Christoffer Dall <[email protected]>
This commit is contained in:
David Daney 2017-06-09 12:49:48 +01:00 • committed by Marc Zyngier
commit 690a341577
5 changed files with 42 additions and 1 deletions
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1
Documentation/arm64/silicon-errata.txt
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@ -62,6 +62,7 @@ stable kernels.
| Cavium | ThunderX GICv3 | #23154 | CAVIUM_ERRATUM_23154 |
| Cavium | ThunderX Core | #27456 | CAVIUM_ERRATUM_27456 |
| Cavium | ThunderX SMMUv2 | #27704 | N/A |
| Cavium | ThunderX Core | #30115 | CAVIUM_ERRATUM_30115 |
| | | | |
| Freescale/NXP | LS2080A/LS1043A | A-008585 | FSL_ERRATUM_A008585 |
| | | | |