linux-kernel - [PATCH v1] RISC-V: make ARCH_THEAD preclude XIP

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Date:   Wed, 21 Jun 2023 20:00:31 +0100
From:   Conor Dooley <conor@...nel.org>
To:     linux-riscv@...ts.infradead.org
Cc:     conor@...nel.org, Conor Dooley <conor.dooley@...rochip.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Jisheng Zhang <jszhang@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v1] RISC-V: make ARCH_THEAD preclude XIP_KERNEL

From: Conor Dooley <conor.dooley@...rochip.com>

Randy reported build errors in linux-next where XIP_KERNEL was enabled.
ARCH_THEAD requires alternatives to support the non-standard ISA
extensions used by the THEAD cores, which are mutually exclusive with
XIP kernels. Clone the dependency list from the Allwinner entry, since
Allwinner's D1 uses T-Head cores with the same non-standard extensions.

Reported-by: Randy Dunlap <rdunlap@...radead.org>
Reviewed-by: Randy Dunlap <rdunlap@...radead.org>
Tested-by: Randy Dunlap <rdunlap@...radead.org> # build-tested
Link: https://lore.kernel.org/all/ab38f6af-cb68-a918-1a63-2e7c927a8ffc@infradead.org/
Fixes: da47ce003963 ("riscv: Add the T-HEAD SoC family Kconfig option")
Signed-off-by: Conor Dooley <conor.dooley@...rochip.com>
---
CC: Paul Walmsley <paul.walmsley@...ive.com>
CC: Palmer Dabbelt <palmer@...belt.com>
CC: Albert Ou <aou@...s.berkeley.edu>
CC: Jisheng Zhang <jszhang@...nel.org>
CC: linux-riscv@...ts.infradead.org
CC: linux-kernel@...r.kernel.org
---
 arch/riscv/Kconfig.socs | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/riscv/Kconfig.socs b/arch/riscv/Kconfig.socs
index ce10a38dff37..6833d01e2e70 100644
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -43,6 +43,7 @@ config ARCH_SUNXI
 
 config ARCH_THEAD
 	bool "T-HEAD RISC-V SoCs"
+	depends on MMU && !XIP_KERNEL
 	select ERRATA_THEAD
 	help
 	  This enables support for the RISC-V based T-HEAD SoCs.
-- 
2.39.2