linux-kernel - [PATCH 3/3] RISC-V: Define MAXPHYSMEM

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Message-Id: <20210129190038.1001626-3-atish.patra@wdc.com>
Date:   Fri, 29 Jan 2021 11:00:38 -0800
From:   Atish Patra <atish.patra@....com>
To:     linux-kernel@...r.kernel.org
Cc:     Atish Patra <atish.patra@....com>,
        Randy Dunlap <rdunlap@...radead.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Albert Ou <aou@...s.berkeley.edu>,
        Anup Patel <anup.patel@....com>,
        Ard Biesheuvel <ardb@...nel.org>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        linux-riscv@...ts.infradead.org,
        Nick Desaulniers <ndesaulniers@...ogle.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Sebastien Van Cauwenberghe <svancau@...il.com>,
        Zong Li <zong.li@...ive.com>
Subject: [PATCH 3/3] RISC-V: Define MAXPHYSMEM_1GB only for RV32

MAXPHYSMEM_1GB option was added for RV32 because RV32 only supports 1GB
of maximum physical memory. This lead to few compilation errors reported
by kernel test robot which created the following configuration combination
which are not useful but can be configured.

1. MAXPHYSMEM_1GB & RV64
2, MAXPHYSMEM_2GB & RV32

Fixes: e557793799c5 ("RISC-V: Fix maximum allowed phsyical memory for RV32")

Fix this by restricting MAXPHYSMEM_1GB for RV32 and MAXPHYSMEM_2GB only for
RV64.

Reported-by: Randy Dunlap <rdunlap@...radead.org>
Acked-by: Randy Dunlap <rdunlap@...radead.org>
Tested-by: Geert Uytterhoeven <geert@...ux-m68k.org>
Signed-off-by: Atish Patra <atish.patra@....com>
---
 arch/riscv/Kconfig | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index e9e2c1f0a690..e0a34eb5ed3b 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -252,8 +252,10 @@ choice
 	default MAXPHYSMEM_128GB if 64BIT && CMODEL_MEDANY
 
 	config MAXPHYSMEM_1GB
+		depends on 32BIT
 		bool "1GiB"
 	config MAXPHYSMEM_2GB
+		depends on 64BIT && CMODEL_MEDLOW
 		bool "2GiB"
 	config MAXPHYSMEM_128GB
 		depends on 64BIT && CMODEL_MEDANY
-- 
2.25.1