0a87c5cfc0
There are several s390 diagnose calls, which must be executed below the 2GB memory boundary. In order to enforce this, those diagnoses must be compiled into the kernel. Currently diag 14 can be called within the vmur kernel module from addresses above 2GB. This leads to specification exceptions. This patch moves diag10, diag14 and diag210 into the new diag.c file. Signed-off-by: Michael Holzheu <holzheu@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
103 lines
1.8 KiB
C
103 lines
1.8 KiB
C
/*
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* Implementation of s390 diagnose codes
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*
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* Copyright IBM Corp. 2007
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* Author(s): Michael Holzheu <holzheu@de.ibm.com>
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*/
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#include <linux/module.h>
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#include <asm/diag.h>
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/*
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* Diagnose 10: Release pages
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*/
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void diag10(unsigned long addr)
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{
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if (addr >= 0x7ff00000)
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return;
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asm volatile(
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#ifdef CONFIG_64BIT
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" sam31\n"
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" diag %0,%0,0x10\n"
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"0: sam64\n"
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#else
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" diag %0,%0,0x10\n"
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"0:\n"
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#endif
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EX_TABLE(0b, 0b)
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: : "a" (addr));
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}
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EXPORT_SYMBOL(diag10);
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/*
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* Diagnose 14: Input spool file manipulation
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*/
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int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode)
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{
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register unsigned long _ry1 asm("2") = ry1;
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register unsigned long _ry2 asm("3") = subcode;
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int rc = 0;
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asm volatile(
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#ifdef CONFIG_64BIT
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" sam31\n"
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" diag %2,2,0x14\n"
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" sam64\n"
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#else
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" diag %2,2,0x14\n"
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#endif
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" ipm %0\n"
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" srl %0,28\n"
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: "=d" (rc), "+d" (_ry2)
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: "d" (rx), "d" (_ry1)
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: "cc");
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return rc;
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}
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EXPORT_SYMBOL(diag14);
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/*
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* Diagnose 210: Get information about a virtual device
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*/
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int diag210(struct diag210 *addr)
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{
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/*
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* diag 210 needs its data below the 2GB border, so we
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* use a static data area to be sure
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*/
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static struct diag210 diag210_tmp;
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static DEFINE_SPINLOCK(diag210_lock);
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unsigned long flags;
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int ccode;
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spin_lock_irqsave(&diag210_lock, flags);
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diag210_tmp = *addr;
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#ifdef CONFIG_64BIT
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asm volatile(
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" lhi %0,-1\n"
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" sam31\n"
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" diag %1,0,0x210\n"
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"0: ipm %0\n"
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" srl %0,28\n"
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"1: sam64\n"
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EX_TABLE(0b, 1b)
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: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
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#else
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asm volatile(
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" lhi %0,-1\n"
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" diag %1,0,0x210\n"
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"0: ipm %0\n"
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" srl %0,28\n"
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"1:\n"
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EX_TABLE(0b, 1b)
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: "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory");
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#endif
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*addr = diag210_tmp;
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spin_unlock_irqrestore(&diag210_lock, flags);
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return ccode;
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}
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EXPORT_SYMBOL(diag210);
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