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authorGerald Schaefer <gerald.schaefer@de.ibm.com>2019-02-21 15:34:21 +0100
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2019-02-21 15:57:24 +0100
commitca57114609d1b9a141a67c2222a7b8edc156291a (patch)
treeb698c25219324b47dd2224feee4726ec5fb3b683 /arch/s390
parentebb7c695d3bc7a4986b92edc8d9ef43491be183e (diff)
downloadlinux-ca57114609d1b9a141a67c2222a7b8edc156291a.tar.bz2
s390/extmem: remove code for 31 bit addressing mode
All supported releases of z/VM allow 64 bit subcodes and addressing mode for diag 0x64. This patch removes a lot of code for handling 31 bit addressing mode and old subcodes. Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/mm/extmem.c129
1 files changed, 12 insertions, 117 deletions
diff --git a/arch/s390/mm/extmem.c b/arch/s390/mm/extmem.c
index eba2def3414d..86c8a3c8d910 100644
--- a/arch/s390/mm/extmem.c
+++ b/arch/s390/mm/extmem.c
@@ -28,12 +28,7 @@
#include <asm/cpcmd.h>
#include <asm/setup.h>
-#define DCSS_LOADSHR 0x00
-#define DCSS_LOADNSR 0x04
#define DCSS_PURGESEG 0x08
-#define DCSS_FINDSEG 0x0c
-#define DCSS_LOADNOLY 0x10
-#define DCSS_SEGEXT 0x18
#define DCSS_LOADSHRX 0x20
#define DCSS_LOADNSRX 0x24
#define DCSS_FINDSEGX 0x2c
@@ -53,20 +48,6 @@ struct qout64 {
struct qrange range[6];
};
-struct qrange_old {
- unsigned int start; /* last byte type */
- unsigned int end; /* last byte reserved */
-};
-
-/* output area format for the Diag x'64' old subcode x'18' */
-struct qout64_old {
- int segstart;
- int segend;
- int segcnt;
- int segrcnt;
- struct qrange_old range[6];
-};
-
struct qin64 {
char qopcode;
char rsrv1[3];
@@ -95,52 +76,10 @@ static DEFINE_MUTEX(dcss_lock);
static LIST_HEAD(dcss_list);
static char *segtype_string[] = { "SW", "EW", "SR", "ER", "SN", "EN", "SC",
"EW/EN-MIXED" };
-static int loadshr_scode, loadnsr_scode;
-static int segext_scode, purgeseg_scode;
-static int scode_set;
-
-/* set correct Diag x'64' subcodes. */
-static int
-dcss_set_subcodes(void)
-{
- char *name = kmalloc(8, GFP_KERNEL | GFP_DMA);
- unsigned long rx, ry;
- int rc;
-
- if (name == NULL)
- return -ENOMEM;
-
- rx = (unsigned long) name;
- ry = DCSS_FINDSEGX;
-
- strcpy(name, "dummy");
- diag_stat_inc(DIAG_STAT_X064);
- asm volatile(
- " diag %0,%1,0x64\n"
- "0: ipm %2\n"
- " srl %2,28\n"
- " j 2f\n"
- "1: la %2,3\n"
- "2:\n"
- EX_TABLE(0b, 1b)
- : "+d" (rx), "+d" (ry), "=d" (rc) : : "cc", "memory");
-
- kfree(name);
- /* Diag x'64' new subcodes are supported, set to new subcodes */
- if (rc != 3) {
- loadshr_scode = DCSS_LOADSHRX;
- loadnsr_scode = DCSS_LOADNSRX;
- purgeseg_scode = DCSS_PURGESEG;
- segext_scode = DCSS_SEGEXTX;
- return 0;
- }
- /* Diag x'64' new subcodes are not supported, set to old subcodes */
- loadshr_scode = DCSS_LOADNOLY;
- loadnsr_scode = DCSS_LOADNSR;
- purgeseg_scode = DCSS_PURGESEG;
- segext_scode = DCSS_SEGEXT;
- return 0;
-}
+static int loadshr_scode = DCSS_LOADSHRX;
+static int loadnsr_scode = DCSS_LOADNSRX;
+static int purgeseg_scode = DCSS_PURGESEG;
+static int segext_scode = DCSS_SEGEXTX;
/*
* Create the 8 bytes, ebcdic VM segment name from
@@ -196,32 +135,15 @@ dcss_diag(int *func, void *parameter,
unsigned long rx, ry;
int rc;
- if (scode_set == 0) {
- rc = dcss_set_subcodes();
- if (rc < 0)
- return rc;
- scode_set = 1;
- }
rx = (unsigned long) parameter;
ry = (unsigned long) *func;
- /* 64-bit Diag x'64' new subcode, keep in 64-bit addressing mode */
diag_stat_inc(DIAG_STAT_X064);
- if (*func > DCSS_SEGEXT)
- asm volatile(
- " diag %0,%1,0x64\n"
- " ipm %2\n"
- " srl %2,28\n"
- : "+d" (rx), "+d" (ry), "=d" (rc) : : "cc");
- /* 31-bit Diag x'64' old subcode, switch to 31-bit addressing mode */
- else
- asm volatile(
- " sam31\n"
- " diag %0,%1,0x64\n"
- " sam64\n"
- " ipm %2\n"
- " srl %2,28\n"
- : "+d" (rx), "+d" (ry), "=d" (rc) : : "cc");
+ asm volatile(
+ " diag %0,%1,0x64\n"
+ " ipm %2\n"
+ " srl %2,28\n"
+ : "+d" (rx), "+d" (ry), "=d" (rc) : : "cc");
*ret1 = rx;
*ret2 = ry;
return rc;
@@ -271,31 +193,6 @@ query_segment_type (struct dcss_segment *seg)
goto out_free;
}
- /* Only old format of output area of Diagnose x'64' is supported,
- copy data for the new format. */
- if (segext_scode == DCSS_SEGEXT) {
- struct qout64_old *qout_old;
- qout_old = kzalloc(sizeof(*qout_old), GFP_KERNEL | GFP_DMA);
- if (qout_old == NULL) {
- rc = -ENOMEM;
- goto out_free;
- }
- memcpy(qout_old, qout, sizeof(struct qout64_old));
- qout->segstart = (unsigned long) qout_old->segstart;
- qout->segend = (unsigned long) qout_old->segend;
- qout->segcnt = qout_old->segcnt;
- qout->segrcnt = qout_old->segrcnt;
-
- if (qout->segcnt > 6)
- qout->segrcnt = 6;
- for (i = 0; i < qout->segrcnt; i++) {
- qout->range[i].start =
- (unsigned long) qout_old->range[i].start;
- qout->range[i].end =
- (unsigned long) qout_old->range[i].end;
- }
- kfree(qout_old);
- }
if (qout->segcnt > 6) {
rc = -EOPNOTSUPP;
goto out_free;
@@ -410,11 +307,9 @@ __segment_load (char *name, int do_nonshared, unsigned long *addr, unsigned long
if (rc < 0)
goto out_free;
- if (loadshr_scode == DCSS_LOADSHRX) {
- if (segment_overlaps_others(seg)) {
- rc = -EBUSY;
- goto out_free;
- }
+ if (segment_overlaps_others(seg)) {
+ rc = -EBUSY;
+ goto out_free;
}
rc = vmem_add_mapping(seg->start_addr, seg->end - seg->start_addr + 1);