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From: Atish Patra <atish.patra@wdc.com>
To: linux-kernel@vger.kernel.org
Cc: Albert Ou <aou@eecs.berkeley.edu>,
	Vincent Chen <vincent.chen@sifive.com>,
	Anup Patel <anup.patel@wdc.com>,
	Sudeep Holla <sudeep.holla@arm.com>,
	Atish Patra <atish.patra@wdc.com>,
	Palmer Dabbelt <palmer@dabbelt.com>, Zong Li <zong.li@sifive.com>,
	Paul Walmsley <paul.walmsley@sifive.com>,
	Greentime Hu <greentime.hu@sifive.com>,
	linux-riscv@lists.infradead.org
Subject: [PATCH 2/4] RISC-V: Set maximum number of mapped pages correctly
Date: Wed, 15 Jul 2020 16:30:07 -0700
Message-ID: <20200715233009.27183-3-atish.patra@wdc.com> (raw)
In-Reply-To: <20200715233009.27183-1-atish.patra@wdc.com>

Currently, maximum number of mapper pages are set to the pfn calculated
from the memblock size of the memblock containing kernel. This will work
until that memblock spans the entire memory. However, it will be set to
a wrong value if there are multiple memblocks defined in kernel
(e.g. with efi runtime services).

Set the the maximum value to the pfn calculated from dram size.

Signed-off-by: Atish Patra <atish.patra@wdc.com>
---
 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 f4adb3684f3d..8d22973bde40 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -150,9 +150,9 @@ void __init setup_bootmem(void)
 	/* Reserve from the start of the kernel to the end of the kernel */
 	memblock_reserve(vmlinux_start, vmlinux_end - vmlinux_start);
 
-	set_max_mapnr(PFN_DOWN(mem_size));
 	max_pfn = PFN_DOWN(memblock_end_of_DRAM());
 	max_low_pfn = max_pfn;
+	set_max_mapnr(max_low_pfn);
 
 #ifdef CONFIG_BLK_DEV_INITRD
 	setup_initrd();
-- 
2.24.0


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  parent reply index

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-07-15 23:30 [PATCH 0/4] Few mm & exception handling fixes Atish Patra
2020-07-15 23:30 ` [PATCH 1/4] RISC-V: Setup exception vector early Atish Patra
2020-07-25  5:12   ` Palmer Dabbelt
2020-07-25  5:26     ` Atish Patra
2020-07-15 23:30 ` Atish Patra [this message]
2020-07-25  5:12   ` [PATCH 2/4] RISC-V: Set maximum number of mapped pages correctly Palmer Dabbelt
2020-07-15 23:30 ` [PATCH 3/4] RISC-V: Do not rely on initrd_start/end computed during early dt parsing Atish Patra
2020-07-25  5:12   ` Palmer Dabbelt
2020-07-25  5:44     ` Atish Patra
2020-07-15 23:30 ` [PATCH 4/4] riscv: Parse all memory blocks to remove unusable memory Atish Patra
2020-07-25  5:12   ` Palmer Dabbelt

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