83ace2701b
Currently the diag10() function can only release one page. For exploiters that have to call diag10 on a contiguous memory region this is suboptimal. This patch replaces the diag10() function with diag10_range() that is able to release multiple pages. In addition to that the new function now allows to release memory with addresses higher than 2047 MiB. This was due to a restriction of the diagnose implementation under z/VM prior to release 5.2. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
/*
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* s390 diagnose functions
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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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#ifndef _ASM_S390_DIAG_H
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#define _ASM_S390_DIAG_H
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/*
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* Diagnose 10: Release page range
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*/
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static inline void diag10_range(unsigned long start_pfn, unsigned long num_pfn)
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{
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unsigned long start_addr, end_addr;
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start_addr = start_pfn << PAGE_SHIFT;
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end_addr = (start_pfn + num_pfn - 1) << PAGE_SHIFT;
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asm volatile(
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"0: diag %0,%1,0x10\n"
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"1:\n"
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EX_TABLE(0b, 1b)
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EX_TABLE(1b, 1b)
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: : "a" (start_addr), "a" (end_addr));
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}
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/*
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* Diagnose 14: Input spool file manipulation
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*/
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extern int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode);
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/*
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* Diagnose 210: Get information about a virtual device
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*/
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struct diag210 {
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u16 vrdcdvno; /* device number (input) */
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u16 vrdclen; /* data block length (input) */
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u8 vrdcvcla; /* virtual device class (output) */
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u8 vrdcvtyp; /* virtual device type (output) */
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u8 vrdcvsta; /* virtual device status (output) */
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u8 vrdcvfla; /* virtual device flags (output) */
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u8 vrdcrccl; /* real device class (output) */
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u8 vrdccrty; /* real device type (output) */
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u8 vrdccrmd; /* real device model (output) */
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u8 vrdccrft; /* real device feature (output) */
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} __attribute__((packed, aligned(4)));
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extern int diag210(struct diag210 *addr);
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#endif /* _ASM_S390_DIAG_H */
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