From: Jisheng Zhang <jszhang@kernel.org>
To: Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>
Cc: Alexandre Ghiti <alex@ghiti.fr>,
linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Subject: [PATCH] riscv: mm: fix wrong phys_ram_base value for RV64
Date: Thu, 2 Dec 2021 23:36:41 +0800 [thread overview]
Message-ID: <20211202153641.1961-1-jszhang@kernel.org> (raw)
Currently, if 64BIT and !XIP_KERNEL, the phys_ram_base is always 0,
no matter the real start of dram reported by memblock is. The original
patch[1] is correct, I believe it's not corrected merged due to lots
of #ifdef in arch/riscv/mm/init.c, I plan to send a clean up series
soon.
[1] http://lists.infradead.org/pipermail/linux-riscv/2021-July/007650.html
Fixes: 6d7f91d914bc ("riscv: Get rid of CONFIG_PHYS_RAM_BASE in kernel physical address conversion")
Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
---
arch/riscv/mm/init.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 24b2b8044602..3c0649dba4ff 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -187,10 +187,10 @@ static void __init setup_bootmem(void)
phys_ram_end = memblock_end_of_DRAM();
-#ifndef CONFIG_64BIT
#ifndef CONFIG_XIP_KERNEL
phys_ram_base = memblock_start_of_DRAM();
#endif
+#ifndef CONFIG_64BIT
/*
* memblock allocator is not aware of the fact that last 4K bytes of
* the addressable memory can not be mapped because of IS_ERR_VALUE
--
2.34.1
next reply other threads:[~2021-12-02 15:43 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-12-02 15:36 Jisheng Zhang [this message]
2021-12-02 15:52 ` [PATCH] riscv: mm: fix wrong phys_ram_base value for RV64 Alexandre ghiti
2021-12-26 8:10 ` Jisheng Zhang
2022-01-11 17:28 ` Palmer Dabbelt
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