diff options
| -rw-r--r-- | Documentation/kernel-parameters.txt | 5 | ||||
| -rw-r--r-- | arch/x86/Kconfig | 29 | ||||
| -rw-r--r-- | arch/x86/kernel/e820_64.c | 10 | ||||
| -rw-r--r-- | arch/x86/mm/init_64.c | 24 |
4 files changed, 56 insertions, 12 deletions
diff --git a/Documentation/kernel-parameters.txt b/Documentation/kernel-parameters.txt index 43c527d72f2f..f9ea0803d5d6 100644 --- a/Documentation/kernel-parameters.txt +++ b/Documentation/kernel-parameters.txt @@ -1147,6 +1147,11 @@ and is between 256 and 4096 characters. It is defined in the file or memmap=0x10000$0x18690000 + memtest= [KNL,X86_64] Enable memtest + Format: <integer> + range: 0,4 : pattern number + default : 0 <disable> + meye.*= [HW] Set MotionEye Camera parameters See Documentation/video4linux/meye.txt. diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index e50e38e76d9f..a0d7406e8b37 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -382,6 +382,35 @@ config PARAVIRT endif +config MEMTEST_BOOTPARAM + bool "Memtest boot parameter" + depends on X86_64 + default y + help + This option adds a kernel parameter 'memtest', which allows memtest + to be disabled at boot. If this option is selected, memtest + functionality can be disabled with memtest=0 on the kernel + command line. The purpose of this option is to allow a single + kernel image to be distributed with memtest built in, but not + necessarily enabled. + + If you are unsure how to answer this question, answer Y. + +config MEMTEST_BOOTPARAM_VALUE + int "Memtest boot parameter default value (0-4)" + depends on MEMTEST_BOOTPARAM + range 0 4 + default 0 + help + This option sets the default value for the kernel parameter + 'memtest', which allows memtest to be disabled at boot. If this + option is set to 0 (zero), the memtest kernel parameter will + default to 0, disabling memtest at bootup. If this option is + set to 4, the memtest kernel parameter will default to 4, + enabling memtest at bootup, and use that as pattern number. + + If you are unsure how to answer this question, answer 0. + config ACPI_SRAT def_bool y depends on X86_32 && ACPI && NUMA && (X86_SUMMIT || X86_GENERICARCH) diff --git a/arch/x86/kernel/e820_64.c b/arch/x86/kernel/e820_64.c index 9184e6437c4f..d6ada0833876 100644 --- a/arch/x86/kernel/e820_64.c +++ b/arch/x86/kernel/e820_64.c @@ -241,7 +241,9 @@ unsigned long __init find_e820_area(unsigned long start, unsigned long end, /* * Find next free range after *start */ -unsigned long __init find_e820_area_size(unsigned long start, unsigned long *sizep, unsigned long align) +unsigned long __init find_e820_area_size(unsigned long start, + unsigned long *sizep, + unsigned long align) { int i; @@ -254,17 +256,15 @@ unsigned long __init find_e820_area_size(unsigned long start, unsigned long *siz continue; addr = round_up(ei->addr, align); ei_last = ei->addr + ei->size; -// printk(KERN_DEBUG "find_e820_area_size : e820 %d [%llx, %lx]\n", i, ei->addr, ei_last); if (addr < start) addr = round_up(start, align); -// printk(KERN_DEBUG "find_e820_area_size : 0 [%lx, %lx]\n", addr, ei_last); if (addr >= ei_last) continue; *sizep = ei_last - addr; - while (bad_addr_size(&addr, sizep, align) && addr+ *sizep <= ei_last) + while (bad_addr_size(&addr, sizep, align) && + addr + *sizep <= ei_last) ; last = addr + *sizep; -// printk(KERN_DEBUG "find_e820_area_size : 1 [%lx, %lx]\n", addr, last); if (last > ei_last) continue; return addr; diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c index 52f54ee4559f..ae225c3ae9a8 100644 --- a/arch/x86/mm/init_64.c +++ b/arch/x86/mm/init_64.c @@ -427,7 +427,10 @@ static void __init init_gbpages(void) direct_gbpages = 0; } -static void __init memtest(unsigned long start_phys, unsigned long size, unsigned pattern) +#ifdef CONFIG_MEMTEST_BOOTPARAM + +static void __init memtest(unsigned long start_phys, unsigned long size, + unsigned pattern) { unsigned long i; unsigned long *start; @@ -486,11 +489,12 @@ static void __init memtest(unsigned long start_phys, unsigned long size, unsigne } -static int __initdata memtest_pattern; +static int memtest_pattern __initdata = CONFIG_MEMTEST_BOOTPARAM_VALUE; + static int __init parse_memtest(char *arg) { if (arg) - memtest_pattern = simple_strtoul(arg, NULL, 0) + 1; + memtest_pattern = simple_strtoul(arg, NULL, 0); return 0; } @@ -501,8 +505,10 @@ static void __init early_memtest(unsigned long start, unsigned long end) unsigned long t_start, t_size; unsigned pattern; - if (memtest_pattern) - printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern); + if (!memtest_pattern) + return; + + printk(KERN_INFO "early_memtest: pattern num %d", memtest_pattern); for (pattern = 0; pattern < memtest_pattern; pattern++) { t_start = start; t_size = 0; @@ -523,9 +529,13 @@ static void __init early_memtest(unsigned long start, unsigned long end) t_start += t_size; } } - if (memtest_pattern) - printk(KERN_CONT "\n"); + printk(KERN_CONT "\n"); } +#else +static void __init early_memtest(unsigned long start, unsigned long end) +{ +} +#endif /* * Setup the direct mapping of the physical memory at PAGE_OFFSET. |