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Commit 06ed5512 authored by Heiko Carstens's avatar Heiko Carstens Committed by Martin Schwidefsky
Browse files

s390/als: print machine type on facility mismatch 



If we have a facility mismatch the kernel only emits a warning that
the processor is not recent enough and stops operating. This doesn't
give us a lot of an idea of what actually went wrong.

As a first step print the machine type in addition.

Signed-off-by: default avatarHeiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: default avatarSascha Silbe <silbe@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent be2412c2

arch/s390/kernel/als.c

+34 −4
Original line number Diff line number Diff line
@@ -19,6 +19,38 @@ 


static unsigned long als[] __initdata = { FACILITIES_ALS };



static void __init u16_to_hex(char *str, u16 val)

{

	int i, num;



	for (i = 1; i <= 4; i++) {

		num = (val >> (16 - 4 * i)) & 0xf;

		if (num >= 10)

			num += 7;

		*str++ = '0' + num;

	}

	*str = '\0';

}



static void __init print_machine_type(void)

{

	static char mach_str[80] __initdata = "Detected machine-type number: ";

	char type_str[5];

	struct cpuid id;



	get_cpu_id(&id);

	u16_to_hex(type_str, id.machine);

	strcat(mach_str, type_str);

	_sclp_print_early(mach_str);

}



static void __init facility_mismatch(void)

{

	_sclp_print_early("The Linux kernel requires more recent processor hardware");

	print_machine_type();

	disabled_wait(0x8badcccc);

}



void __init verify_facilities(void)

{

	int i;
@@ -38,9 +70,7 @@ void __init verify_facilities(void) 
			     : "memory", "cc");

	}

	for (i = 0; i < ARRAY_SIZE(als); i++) {

		if ((S390_lowcore.stfle_fac_list[i] & als[i]) == als[i])

			continue;

		_sclp_print_early("The Linux kernel requires more recent processor hardware");

		disabled_wait(0x8badcccc);

		if ((S390_lowcore.stfle_fac_list[i] & als[i]) != als[i])

			facility_mismatch();

	}

}