Commit 4a20799d authored by Vladimir Murzin's avatar Vladimir Murzin Committed by Linus Torvalds
Browse files

mm: move memtest under mm



Memtest is a simple feature which fills the memory with a given set of
patterns and validates memory contents, if bad memory regions is detected
it reserves them via memblock API.  Since memblock API is widely used by
other architectures this feature can be enabled outside of x86 world.

This patch set promotes memtest to live under generic mm umbrella and
enables memtest feature for arm/arm64.

It was reported that this patch set was useful for tracking down an issue
with some errant DMA on an arm64 platform.

This patch (of 6):

There is nothing platform dependent in the core memtest code, so other
platforms might benefit from this feature too.

[linux@roeck-us.net: MEMTEST depends on MEMBLOCK]
Signed-off-by: default avatarVladimir Murzin <vladimir.murzin@arm.com>
Acked-by: default avatarWill Deacon <will.deacon@arm.com>
Tested-by: default avatarMark Rutland <mark.rutland@arm.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Paul Bolle <pebolle@tiscali.nl>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 02057967
......@@ -721,17 +721,6 @@ endif #HYPERVISOR_GUEST
config NO_BOOTMEM
def_bool y
config MEMTEST
bool "Memtest"
---help---
This option adds a kernel parameter 'memtest', which allows memtest
to be set.
memtest=0, mean disabled; -- default
memtest=1, mean do 1 test pattern;
...
memtest=4, mean do 4 test patterns.
If you are unsure how to answer this question, answer N.
source "arch/x86/Kconfig.cpu"
config HPET_TIMER
......
......@@ -40,14 +40,6 @@ static inline void e820_mark_nosave_regions(unsigned long limit_pfn)
}
#endif
#ifdef CONFIG_MEMTEST
extern void early_memtest(unsigned long start, unsigned long end);
#else
static inline void early_memtest(unsigned long start, unsigned long end)
{
}
#endif
extern unsigned long e820_end_of_ram_pfn(void);
extern unsigned long e820_end_of_low_ram_pfn(void);
extern u64 early_reserve_e820(u64 sizet, u64 align);
......
......@@ -32,6 +32,4 @@ obj-$(CONFIG_AMD_NUMA) += amdtopology.o
obj-$(CONFIG_ACPI_NUMA) += srat.o
obj-$(CONFIG_NUMA_EMU) += numa_emulation.o
obj-$(CONFIG_MEMTEST) += memtest.o
obj-$(CONFIG_X86_INTEL_MPX) += mpx.o
......@@ -365,6 +365,14 @@ static inline unsigned long memblock_region_reserved_end_pfn(const struct memblo
#define __initdata_memblock
#endif
#ifdef CONFIG_MEMTEST
extern void early_memtest(unsigned long start, unsigned long end);
#else
static inline void early_memtest(unsigned long start, unsigned long end)
{
}
#endif
#else
static inline phys_addr_t memblock_alloc(phys_addr_t size, phys_addr_t align)
{
......
......@@ -1745,6 +1745,18 @@ config TEST_UDELAY
If unsure, say N.
config MEMTEST
bool "Memtest"
depends on HAVE_MEMBLOCK
---help---
This option adds a kernel parameter 'memtest', which allows memtest
to be set.
memtest=0, mean disabled; -- default
memtest=1, mean do 1 test pattern;
...
memtest=4, mean do 4 test patterns.
If you are unsure how to answer this question, answer N.
source "samples/Kconfig"
source "lib/Kconfig.kgdb"
......
......@@ -55,6 +55,7 @@ obj-$(CONFIG_KMEMCHECK) += kmemcheck.o
obj-$(CONFIG_KASAN) += kasan/
obj-$(CONFIG_FAILSLAB) += failslab.o
obj-$(CONFIG_MEMORY_HOTPLUG) += memory_hotplug.o
obj-$(CONFIG_MEMTEST) += memtest.o
obj-$(CONFIG_MIGRATION) += migrate.o
obj-$(CONFIG_QUICKLIST) += quicklist.o
obj-$(CONFIG_TRANSPARENT_HUGEPAGE) += huge_memory.o
......
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