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authorLorenzo Pieralisi <lpieralisi@kernel.org>2023-07-04 17:50:34 +0200
committerMarc Zyngier <maz@kernel.org>2023-07-11 10:04:31 +0200
commit6fe5c68ee6a1aae0ef291a56001e7888de547fa2 (patch)
treed1ff279888b87f9f0a5c9771f4be3accab0eca38 /Documentation
parentirqchip/gic-v3: Enable Rockchip 3588001 erratum workaround for RK3588S (diff)
downloadlinux-6fe5c68ee6a1aae0ef291a56001e7888de547fa2.tar.xz
linux-6fe5c68ee6a1aae0ef291a56001e7888de547fa2.zip
irqchip/gic-v3: Workaround for GIC-700 erratum 2941627
GIC700 erratum 2941627 may cause GIC-700 missing SPIs wake requests when SPIs are deactivated while targeting a sleeping CPU - ie a CPU for which the redistributor: GICR_WAKER.ProcessorSleep == 1 This runtime situation can happen if an SPI that has been activated on a core is retargeted to a different core, it becomes pending and the target core subsequently enters a power state quiescing the respective redistributor. When this situation is hit, the de-activation carried out on the core that activated the SPI (through either ICC_EOIR1_EL1 or ICC_DIR_EL1 register writes) does not trigger a wake requests for the sleeping GIC redistributor even if the SPI is pending. Work around the erratum by de-activating the SPI using the redistributor GICD_ICACTIVER register if the runtime conditions require it (ie the IRQ was retargeted between activation and de-activation). Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org> Signed-off-by: Marc Zyngier <maz@kernel.org> Link: https://lore.kernel.org/r/20230704155034.148262-1-lpieralisi@kernel.org
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/arm64/silicon-errata.rst3
1 files changed, 3 insertions, 0 deletions
diff --git a/Documentation/arm64/silicon-errata.rst b/Documentation/arm64/silicon-errata.rst
index d6430ade349d..0d55d58c645c 100644
--- a/Documentation/arm64/silicon-errata.rst
+++ b/Documentation/arm64/silicon-errata.rst
@@ -141,6 +141,9 @@ stable kernels.
| ARM | MMU-500 | #841119,826419 | N/A |
+----------------+-----------------+-----------------+-----------------------------+
+----------------+-----------------+-----------------+-----------------------------+
+| ARM | GIC-700 | #2941627 | ARM64_ERRATUM_2941627 |
++----------------+-----------------+-----------------+-----------------------------+
++----------------+-----------------+-----------------+-----------------------------+
| Broadcom | Brahma-B53 | N/A | ARM64_ERRATUM_845719 |
+----------------+-----------------+-----------------+-----------------------------+
| Broadcom | Brahma-B53 | N/A | ARM64_ERRATUM_843419 |