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[108.26.182.112]) by smtp.gmail.com with ESMTPSA id v21-20020ac87295000000b003a5430ee366sm507330qto.60.2023.01.18.21.26.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 18 Jan 2023 21:26:45 -0800 (PST) From: Jesse Taube X-Google-Original-From: Jesse Taube To: linux-riscv@lists.infradead.org Cc: linux-kernel@vger.kernel.org, Jesse Taube , Yimin Gu , Waldemar Brodkorb , Albert Ou , Palmer Dabbelt , Paul Walmsley Subject: [PATCH v1 1/2] riscv: Kconfig: Allow RV32 to build with no MMU Date: Thu, 19 Jan 2023 00:26:41 -0500 Message-Id: <20230119052642.1112171-2-Mr.Bossman075@gmail.com> X-Mailer: git-send-email 2.39.0 In-Reply-To: <20230119052642.1112171-1-Mr.Bossman075@gmail.com> References: <20230119052642.1112171-1-Mr.Bossman075@gmail.com> MIME-Version: 1.0 X-Spam-Status: No, score=-1.8 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_ENVFROM_END_DIGIT, FREEMAIL_FROM,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1755427981453728749?= X-GMAIL-MSGID: =?utf-8?q?1755427981453728749?= From: Yimin Gu Some RISC-V 32bit ores do not have an MMU, and the kernel should be able to build for them. This patch enables the RV32 to be built with no MMU support. Signed-off-by: Yimin Gu CC: Jesse Taube Tested-By: Waldemar Brodkorb Signed-off-by: Jesse Taube Reported-by: kernel test robot Signed-off-by: Conor Dooley --- arch/riscv/Kconfig | 5 ++--- 1 file changed, 2 insertions(+), 3 deletions(-) diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig index 59d18881f35b..49759dbe6a8f 100644 --- a/arch/riscv/Kconfig +++ b/arch/riscv/Kconfig @@ -163,8 +163,8 @@ config MMU config PAGE_OFFSET hex - default 0xC0000000 if 32BIT - default 0x80000000 if 64BIT && !MMU + default 0xC0000000 if 32BIT && MMU + default 0x80000000 if !MMU default 0xff60000000000000 if 64BIT config KASAN_SHADOW_OFFSET @@ -262,7 +262,6 @@ config ARCH_RV32I select GENERIC_LIB_ASHRDI3 select GENERIC_LIB_LSHRDI3 select GENERIC_LIB_UCMPDI2 - select MMU config ARCH_RV64I bool "RV64I"