Unverified Commit f6e5aedf authored by Kefeng Wang's avatar Kefeng Wang Committed by Palmer Dabbelt
Browse files

riscv: Add support for memtest 



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: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: default avatarPalmer Dabbelt <palmerdabbelt@google.com>
parent a38fd874

Documentation/admin-guide/kernel-parameters.txt

+1 −1
Original line number Diff line number Diff line
@@ -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
Original line number Diff line number Diff line
@@ -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();