linux-kernel - [PATCH 4.6 015/121] MIPS: Loongson-3: Reserve 32MB for RS780E integrated GPU

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Date:	Sun,  5 Jun 2016 14:42:47 -0700
From:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:	linux-kernel@...r.kernel.org
Cc:	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	stable@...r.kernel.org, Huacai Chen <chenhc@...ote.com>,
	Aurelien Jarno <aurelien@...el32.net>,
	"Steven J . Hill" <sjhill@...litydiluted.com>,
	Fuxin Zhang <zhangfx@...ote.com>,
	Zhangjin Wu <wuzhangjin@...il.com>, linux-mips@...ux-mips.org,
	Ralf Baechle <ralf@...ux-mips.org>
Subject: [PATCH 4.6 015/121] MIPS: Loongson-3: Reserve 32MB for RS780E integrated GPU

4.6-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Huacai Chen <chenhc@...ote.com>

commit 3484de7bcbed20ecbf2b8d80671619e7059e2dd7 upstream.

Due to datasheet, reserving 0xff800000~0xffffffff (8MB below 4GB) is
not enough for RS780E integrated GPU's TOM (top of memory) registers
and MSI/MSI-x memory region, so we reserve 0xfe000000~0xffffffff (32MB
below 4GB).

Signed-off-by: Huacai Chen <chenhc@...ote.com>
Cc: Aurelien Jarno <aurelien@...el32.net>
Cc: Steven J . Hill <sjhill@...litydiluted.com>
Cc: Fuxin Zhang <zhangfx@...ote.com>
Cc: Zhangjin Wu <wuzhangjin@...il.com>
Cc: linux-mips@...ux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/12889/
Signed-off-by: Ralf Baechle <ralf@...ux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 arch/mips/loongson64/loongson-3/numa.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/arch/mips/loongson64/loongson-3/numa.c
+++ b/arch/mips/loongson64/loongson-3/numa.c
@@ -213,10 +213,10 @@ static void __init node_mem_init(unsigne
 		BOOTMEM_DEFAULT);

 	if (node == 0 && node_end_pfn(0) >= (0xffffffff >> PAGE_SHIFT)) {
-		/* Reserve 0xff800000~0xffffffff for RS780E integrated GPU */
+		/* Reserve 0xfe000000~0xffffffff for RS780E integrated GPU */
 		reserve_bootmem_node(NODE_DATA(node),
-				(node_addrspace_offset | 0xff800000),
-				8 << 20, BOOTMEM_DEFAULT);
+				(node_addrspace_offset | 0xfe000000),
+				32 << 20, BOOTMEM_DEFAULT);
 	}

 	sparse_memory_present_with_active_regions(node);