linux-kernel - [RFC PATCH V2 38/38] 64ilp32 v.s. 64lp64

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Message-Id: <20231112061514.2306187-39-guoren@kernel.org>
Date:   Sun, 12 Nov 2023 01:15:14 -0500
From:   guoren@...nel.org
To:     arnd@...db.de, guoren@...nel.org, palmer@...osinc.com,
        tglx@...utronix.de, conor.dooley@...rochip.com, heiko@...ech.de,
        apatel@...tanamicro.com, atishp@...shpatra.org, bjorn@...nel.org,
        paul.walmsley@...ive.com, anup@...infault.org, jiawei@...as.ac.cn,
        liweiwei@...as.ac.cn, wefu@...hat.com, U2FsdGVkX1@...il.com,
        wangjunqiang@...as.ac.cn, kito.cheng@...ive.com,
        andy.chiu@...ive.com, vincent.chen@...ive.com,
        greentime.hu@...ive.com, wuwei2016@...as.ac.cn, jrtc27@...c27.com,
        luto@...nel.org, fweimer@...hat.com, catalin.marinas@....com,
        hjl.tools@...il.com
Cc:     linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, Guo Ren <guoren@...ux.alibaba.com>
Subject: [RFC PATCH V2 38/38] 64ilp32 v.s. 64lp64

From: Guo Ren <guoren@...ux.alibaba.com>

Signed-off-by: Guo Ren <guoren@...ux.alibaba.com>
---
 arch/riscv/Kconfig            | 1 -
 arch/riscv/include/asm/page.h | 2 +-
 init/main.c                   | 2 ++
 3 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
index 5106eab17811..acd6aa60ed84 100644
--- a/arch/riscv/Kconfig
+++ b/arch/riscv/Kconfig
@@ -160,7 +160,6 @@ config RISCV
 	select THREAD_INFO_IN_TASK
 	select TRACE_IRQFLAGS_SUPPORT
 	select UACCESS_MEMCPY if !MMU
-	select ZONE_DMA32 if 64BIT
 
 config CLANG_SUPPORTS_DYNAMIC_FTRACE
 	def_bool CC_IS_CLANG
diff --git a/arch/riscv/include/asm/page.h b/arch/riscv/include/asm/page.h
index 7c535e88cf91..f9af3e6b6e21 100644
--- a/arch/riscv/include/asm/page.h
+++ b/arch/riscv/include/asm/page.h
@@ -106,7 +106,7 @@ typedef struct page *pgtable_t;
  * We override this value as its generic definition uses __pa too early in
  * the boot process (before kernel_map.va_pa_offset is set).
  */
-#define MIN_MEMBLOCK_ADDR      0
+#define MIN_MEMBLOCK_ADDR      0x60400000ULL
 #endif
 
 #ifdef CONFIG_MMU
diff --git a/init/main.c b/init/main.c
index ad920fac325c..f88f0227e398 100644
--- a/init/main.c
+++ b/init/main.c
@@ -1496,6 +1496,8 @@ static int __ref kernel_init(void *unused)
 	    !try_to_run_init_process("/bin/sh"))
 		return 0;
 
+	show_mem(0, NULL);
+
 	panic("No working init found.  Try passing init= option to kernel. "
 	      "See Linux Documentation/admin-guide/init.rst for guidance.");
 }
-- 
2.36.1