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[S390] Program check in diag 210 under 31 bit 

If a virtual address is passed to the diag210 function under 31 bit, we get a
programming exception, since diag 210 only works with physical addresses. To
fix this, the content of the diag210 data structure is copied to a local
structure and the physical address of that structure is passed to diagnose 210.

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu 2007-07-10 11:24:15 +02:00 committed by Martin Schwidefsky
parent 8a88367088
commit dc4123303b
1 changed files with 7 additions and 15 deletions
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22
drivers/s390/cio/device_id.c
View File

@ -27,7 +27,6 @@
/*
* diag210 is used under VM to get information about a virtual device
*/
#ifdef CONFIG_64BIT
int
diag210(struct diag210 * addr)
{
@ -43,6 +42,7 @@ diag210(struct diag210 * addr)
spin_lock_irqsave(&diag210_lock, flags);
diag210_tmp = *addr;
#ifdef CONFIG_64BIT
asm volatile(
" lhi %0,-1\n"
" sam31\n"
@ -51,19 +51,8 @@ diag210(struct diag210 * addr)
" srl %0,28\n"
"1: sam64\n"
EX_TABLE(0b,1b)
: "=&d" (ccode) : "a" (__pa(&diag210_tmp)) : "cc", "memory");
*addr = diag210_tmp;
spin_unlock_irqrestore(&diag210_lock, flags);
return ccode;
}
: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
#else
int
diag210(struct diag210 * addr)
{
int ccode;
asm volatile(
" lhi %0,-1\n"
" diag %1,0,0x210\n"
@ -71,11 +60,14 @@ diag210(struct diag210 * addr)
" srl %0,28\n"
"1:\n"
EX_TABLE(0b,1b)
: "=&d" (ccode) : "a" (__pa(addr)) : "cc", "memory");
: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
#endif
*addr = diag210_tmp;
spin_unlock_irqrestore(&diag210_lock, flags);
return ccode;
}
#endif
/*
* Input :