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[PULL,1/2] hw/loongarch/virt: Align high memory base address with super page size

Message ID 20231221080611.2960977-2-gaosong@loongson.cn
State New
Headers show
Series [PULL,1/2] hw/loongarch/virt: Align high memory base address with super page size | expand

Commit Message

Song Gao Dec. 21, 2023, 8:06 a.m. UTC 
From: Bibo Mao <maobibo@loongson.cn>

With LoongArch virt machine, there is low memory space with region
0--0x10000000, and high memory space with started from 0x90000000.
High memory space is aligned with 256M, it will be better if it is
aligned with 1G, which is super page aligned for 4K page size.

Currently linux kernel and uefi bios has no limitation with high
memory base address, it is ok to set high memory base address
with 0x80000000.

Signed-off-by: Bibo Mao <maobibo@loongson.cn>
Reviewed-by: Song Gao <gaosong@loongson.cn>
Message-Id: <20231127040231.4123715-1-maobibo@loongson.cn>
Signed-off-by: Song Gao <gaosong@loongson.cn>
---
 include/hw/loongarch/virt.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/include/hw/loongarch/virt.h b/include/hw/loongarch/virt.h
index 674f4655e0..db0831b471 100644
--- a/include/hw/loongarch/virt.h
+++ b/include/hw/loongarch/virt.h
@@ -25,7 +25,7 @@ 
 
 #define VIRT_LOWMEM_BASE        0
 #define VIRT_LOWMEM_SIZE        0x10000000
-#define VIRT_HIGHMEM_BASE       0x90000000
+#define VIRT_HIGHMEM_BASE       0x80000000
 #define VIRT_GED_EVT_ADDR       0x100e0000
 #define VIRT_GED_MEM_ADDR       (VIRT_GED_EVT_ADDR + ACPI_GED_EVT_SEL_LEN)
 #define VIRT_GED_REG_ADDR       (VIRT_GED_MEM_ADDR + MEMORY_HOTPLUG_IO_LEN)