linux-kernel - [PATCH 5.15 080/110] riscv: alternative only works on !XIP

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Date:   Mon, 14 Mar 2022 12:54:22 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Jisheng Zhang <jszhang@...nel.org>,
        Palmer Dabbelt <palmer@...osinc.com>
Subject: [PATCH 5.15 080/110] riscv: alternative only works on !XIP_KERNEL

From: Jisheng Zhang <jszhang@...nel.org>

commit c80ee64a8020ef1a6a92109798080786829b8994 upstream.

The alternative mechanism needs runtime code patching, it can't work
on XIP_KERNEL. And the errata workarounds are implemented via the
alternative mechanism. So add !XIP_KERNEL dependency for alternative
and erratas.

Signed-off-by: Jisheng Zhang <jszhang@...nel.org>
Fixes: 44c922572952 ("RISC-V: enable XIP")
Cc: stable@...r.kernel.org
Signed-off-by: Palmer Dabbelt <palmer@...osinc.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 arch/riscv/Kconfig.erratas |    1 +
 arch/riscv/Kconfig.socs    |    4 ++--
 2 files changed, 3 insertions(+), 2 deletions(-)

--- a/arch/riscv/Kconfig.erratas
+++ b/arch/riscv/Kconfig.erratas
@@ -2,6 +2,7 @@ menu "CPU errata selection"
 
 config RISCV_ERRATA_ALTERNATIVE
 	bool "RISC-V alternative scheme"
+	depends on !XIP_KERNEL
 	default y
 	help
 	  This Kconfig allows the kernel to automatically patch the
--- a/arch/riscv/Kconfig.socs
+++ b/arch/riscv/Kconfig.socs
@@ -14,8 +14,8 @@ config SOC_SIFIVE
 	select CLK_SIFIVE
 	select CLK_SIFIVE_PRCI
 	select SIFIVE_PLIC
-	select RISCV_ERRATA_ALTERNATIVE
-	select ERRATA_SIFIVE
+	select RISCV_ERRATA_ALTERNATIVE if !XIP_KERNEL
+	select ERRATA_SIFIVE if !XIP_KERNEL
 	help
 	  This enables support for SiFive SoC platform hardware.