Commit c41d4e3e authored by Michael Holzheu's avatar Michael Holzheu Committed by Martin Schwidefsky
Browse files

[S390] Add exception handler for diagnose 224 



To be able to run with the diagnose 224 switched off, a potential
specification exception has to be handled.

Signed-off-by: default avatarMichael Holzheu <holzheu@de.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 3f0a6766

arch/s390/hypfs/hypfs_diag.c

+14 −3
Original line number Diff line number Diff line
@@ -481,9 +481,17 @@ static void *diag204_store(void) 


/* Diagnose 224 functions */



static void diag224(void *ptr)

static int diag224(void *ptr)

{

	asm volatile("diag %0,%1,0x224" : :"d" (0), "d"(ptr) : "memory");

	int rc = -ENOTSUPP;



	asm volatile(

		"	diag	%1,%2,0x224\n"

		"0:	lhi	%0,0x0\n"

		"1:\n"

		EX_TABLE(0b,1b)

		: "+d" (rc) :"d" (0), "d" (ptr) : "memory");

	return rc;

}



static int diag224_get_name_table(void)
@@ -492,7 +500,10 @@ static int diag224_get_name_table(void) 
	diag224_cpu_names = kmalloc(PAGE_SIZE, GFP_KERNEL | GFP_DMA);

	if (!diag224_cpu_names)

		return -ENOMEM;

	diag224(diag224_cpu_names);

	if (diag224(diag224_cpu_names)) {

		kfree(diag224_cpu_names);

		return -ENOTSUPP;

	}

	EBCASC(diag224_cpu_names + 16, (*diag224_cpu_names + 1) * 16);

	return 0;

}