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riscv: Add support for memtest

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The riscv [rv32_]defconfig enabled CONFIG_MEMTEST,
but memtest feature is not supported in RISCV.

Add early_memtest() to support for memtest.

Signed-off-by: Kefeng Wang <[email protected]>
Signed-off-by: Palmer Dabbelt <[email protected]>
This commit is contained in:
Kefeng Wang authored and Palmer Dabbelt committed 2021-03-09 18:09:46 -08:00
1 parent a38fd87484
commit f6e5aedf47
2 files changed
+5 -3
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Documentation/admin-guide/kernel-parameters.txt
+1 -1
View File
@@ -2794,7 +2794,7 @@
seconds. Use this parameter to check at some
other rate. 0 disables periodic checking.
memtest= [KNL,X86,ARM,PPC] Enable memtest
memtest= [KNL,X86,ARM,PPC,RISCV] Enable memtest
Format: <integer>
default : 0 <disable>
Specifies the number of memtest passes to be
arch/riscv/mm/init.c
+4 -2
View File
@@ -128,8 +128,9 @@ void __init setup_bootmem(void)
if (max_mapped_addr == (dram_end - 1))
memblock_set_current_limit(max_mapped_addr - 4096);
max_pfn = PFN_DOWN(dram_end);
max_low_pfn = max_pfn;
min_low_pfn = PFN_UP(memblock_start_of_DRAM());
max_low_pfn = max_pfn = PFN_DOWN(dram_end);
dma32_phys_limit = min(4UL * SZ_1G, (unsigned long)PFN_PHYS(max_low_pfn));
set_max_mapnr(max_low_pfn - ARCH_PFN_OFFSET);
@@ -593,6 +594,7 @@ void __init paging_init(void)
void __init misc_mem_init(void)
{
early_memtest(min_low_pfn << PAGE_SHIFT, max_low_pfn << PAGE_SHIFT);
arch_numa_init();
sparse_init();
zone_sizes_init();