Re: [PATCH v2 1/8] riscv: errata: Add StarFive JH7100 errata

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On Thu, 30 Nov 2023 07:19:25 PST (-0800), emil.renner.berthing@xxxxxxxxxxxxx wrote:
This not really an errata, but since the JH7100 was made before
the standard Zicbom extension it needs the DMA_GLOBAL_POOL and
RISCV_NONSTANDARD_CACHE_OPS enabled to work correctly.

Acked-by: Conor Dooley <conor.dooley@xxxxxxxxxxxxx>
Signed-off-by: Emil Renner Berthing <emil.renner.berthing@xxxxxxxxxxxxx>
---
 arch/riscv/Kconfig.errata | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/riscv/Kconfig.errata b/arch/riscv/Kconfig.errata
index e2c731cfed8c..692de149141f 100644
--- a/arch/riscv/Kconfig.errata
+++ b/arch/riscv/Kconfig.errata
@@ -53,6 +53,23 @@ config ERRATA_SIFIVE_CIP_1200

 	  If you don't know what to do here, say "Y".

+config ERRATA_STARFIVE_JH7100
+	bool "StarFive JH7100 support"
+	depends on ARCH_STARFIVE && NONPORTABLE
+	select DMA_GLOBAL_POOL
+	select RISCV_DMA_NONCOHERENT
+	select RISCV_NONSTANDARD_CACHE_OPS
+	select SIFIVE_CCACHE
+	default n
+	help
+	  The StarFive JH7100 was a test chip for the JH7110 and has
+	  caches that are non-coherent with respect to peripheral DMAs.
+	  It was designed before the Zicbom extension so needs non-standard
+	  cache operations through the SiFive cache controller.
+
+	  Say "Y" if you want to support the BeagleV Starlight and/or
+	  StarFive VisionFive V1 boards.
+
 config ERRATA_THEAD
 	bool "T-HEAD errata"
 	depends on RISCV_ALTERNATIVE

Reviewed-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>
Acked-by: Palmer Dabbelt <palmer@xxxxxxxxxxxx>

Thanks for dealing with this. This is mostly DT stuff so I'm fine with it going via Conor's tree, but LMK if you guys want me to take it.




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