mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-28 07:04:00 +08:00
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
/*
|
|
* s390 diagnose functions
|
|
*
|
|
* Copyright IBM Corp. 2007
|
|
* Author(s): Michael Holzheu <holzheu@de.ibm.com>
|
|
*/
|
|
|
|
#ifndef _ASM_S390_DIAG_H
|
|
#define _ASM_S390_DIAG_H
|
|
|
|
/*
|
|
* Diagnose 10: Release page range
|
|
*/
|
|
static inline void diag10_range(unsigned long start_pfn, unsigned long num_pfn)
|
|
{
|
|
unsigned long start_addr, end_addr;
|
|
|
|
start_addr = start_pfn << PAGE_SHIFT;
|
|
end_addr = (start_pfn + num_pfn - 1) << PAGE_SHIFT;
|
|
|
|
asm volatile(
|
|
"0: diag %0,%1,0x10\n"
|
|
"1:\n"
|
|
EX_TABLE(0b, 1b)
|
|
EX_TABLE(1b, 1b)
|
|
: : "a" (start_addr), "a" (end_addr));
|
|
}
|
|
|
|
/*
|
|
* Diagnose 14: Input spool file manipulation
|
|
*/
|
|
extern int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode);
|
|
|
|
/*
|
|
* Diagnose 210: Get information about a virtual device
|
|
*/
|
|
struct diag210 {
|
|
u16 vrdcdvno; /* device number (input) */
|
|
u16 vrdclen; /* data block length (input) */
|
|
u8 vrdcvcla; /* virtual device class (output) */
|
|
u8 vrdcvtyp; /* virtual device type (output) */
|
|
u8 vrdcvsta; /* virtual device status (output) */
|
|
u8 vrdcvfla; /* virtual device flags (output) */
|
|
u8 vrdcrccl; /* real device class (output) */
|
|
u8 vrdccrty; /* real device type (output) */
|
|
u8 vrdccrmd; /* real device model (output) */
|
|
u8 vrdccrft; /* real device feature (output) */
|
|
} __attribute__((packed, aligned(4)));
|
|
|
|
extern int diag210(struct diag210 *addr);
|
|
|
|
#endif /* _ASM_S390_DIAG_H */
|