From 0a87c5cfc0bb0c1bdcc1cc9fd82e4a1711fac512 Mon Sep 17 00:00:00 2001 From: Michael Holzheu Date: Wed, 22 Aug 2007 13:51:40 +0200 Subject: [S390] vmur: fix diag14 exceptions with addresses > 2GB. 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 Signed-off-by: Martin Schwidefsky Signed-off-by: Heiko Carstens --- arch/s390/kernel/Makefile | 2 +- arch/s390/kernel/diag.c | 102 ++++++++++++++++++++++++++++++++++++++++++ arch/s390/kernel/s390_ksyms.c | 1 - arch/s390/mm/cmm.c | 1 + arch/s390/mm/init.c | 17 ------- 5 files changed, 104 insertions(+), 19 deletions(-) create mode 100644 arch/s390/kernel/diag.c (limited to 'arch/s390') diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index 3195d375bd51..56cb71007cd9 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -6,7 +6,7 @@ EXTRA_AFLAGS := -traditional obj-y := bitmap.o traps.o time.o process.o base.o early.o \ setup.o sys_s390.o ptrace.o signal.o cpcmd.o ebcdic.o \ - semaphore.o s390_ext.o debug.o irq.o ipl.o dis.o + semaphore.o s390_ext.o debug.o irq.o ipl.o dis.o diag.o obj-y += $(if $(CONFIG_64BIT),entry64.o,entry.o) obj-y += $(if $(CONFIG_64BIT),reipl64.o,reipl.o) diff --git a/arch/s390/kernel/diag.c b/arch/s390/kernel/diag.c new file mode 100644 index 000000000000..c032d11da8a1 --- /dev/null +++ b/arch/s390/kernel/diag.c @@ -0,0 +1,102 @@ +/* + * Implementation of s390 diagnose codes + * + * Copyright IBM Corp. 2007 + * Author(s): Michael Holzheu + */ + +#include +#include + +/* + * Diagnose 10: Release pages + */ +void diag10(unsigned long addr) +{ + if (addr >= 0x7ff00000) + return; + asm volatile( +#ifdef CONFIG_64BIT + " sam31\n" + " diag %0,%0,0x10\n" + "0: sam64\n" +#else + " diag %0,%0,0x10\n" + "0:\n" +#endif + EX_TABLE(0b, 0b) + : : "a" (addr)); +} +EXPORT_SYMBOL(diag10); + +/* + * Diagnose 14: Input spool file manipulation + */ +int diag14(unsigned long rx, unsigned long ry1, unsigned long subcode) +{ + register unsigned long _ry1 asm("2") = ry1; + register unsigned long _ry2 asm("3") = subcode; + int rc = 0; + + asm volatile( +#ifdef CONFIG_64BIT + " sam31\n" + " diag %2,2,0x14\n" + " sam64\n" +#else + " diag %2,2,0x14\n" +#endif + " ipm %0\n" + " srl %0,28\n" + : "=d" (rc), "+d" (_ry2) + : "d" (rx), "d" (_ry1) + : "cc"); + + return rc; +} +EXPORT_SYMBOL(diag14); + +/* + * Diagnose 210: Get information about a virtual device + */ +int diag210(struct diag210 *addr) +{ + /* + * diag 210 needs its data below the 2GB border, so we + * use a static data area to be sure + */ + static struct diag210 diag210_tmp; + static DEFINE_SPINLOCK(diag210_lock); + unsigned long flags; + int ccode; + + spin_lock_irqsave(&diag210_lock, flags); + diag210_tmp = *addr; + +#ifdef CONFIG_64BIT + asm volatile( + " lhi %0,-1\n" + " sam31\n" + " diag %1,0,0x210\n" + "0: ipm %0\n" + " srl %0,28\n" + "1: sam64\n" + EX_TABLE(0b, 1b) + : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory"); +#else + asm volatile( + " lhi %0,-1\n" + " diag %1,0,0x210\n" + "0: ipm %0\n" + " srl %0,28\n" + "1:\n" + EX_TABLE(0b, 1b) + : "=&d" (ccode) : "a" (&diag210_tmp) : "cc", "memory"); +#endif + + *addr = diag210_tmp; + spin_unlock_irqrestore(&diag210_lock, flags); + + return ccode; +} +EXPORT_SYMBOL(diag210); diff --git a/arch/s390/kernel/s390_ksyms.c b/arch/s390/kernel/s390_ksyms.c index 90b5ef529eb7..7234c737f825 100644 --- a/arch/s390/kernel/s390_ksyms.c +++ b/arch/s390/kernel/s390_ksyms.c @@ -25,7 +25,6 @@ EXPORT_SYMBOL(_oi_bitmap); EXPORT_SYMBOL(_ni_bitmap); EXPORT_SYMBOL(_zb_findmap); EXPORT_SYMBOL(_sb_findmap); -EXPORT_SYMBOL(diag10); /* * semaphore ops diff --git a/arch/s390/mm/cmm.c b/arch/s390/mm/cmm.c index c5b2f4f078bc..fabc50adc46a 100644 --- a/arch/s390/mm/cmm.c +++ b/arch/s390/mm/cmm.c @@ -20,6 +20,7 @@ #include #include +#include static char *sender = "VMRMSVM"; module_param(sender, charp, 0400); diff --git a/arch/s390/mm/init.c b/arch/s390/mm/init.c index 9098531a2671..3a25bbf2eb0a 100644 --- a/arch/s390/mm/init.c +++ b/arch/s390/mm/init.c @@ -42,23 +42,6 @@ DEFINE_PER_CPU(struct mmu_gather, mmu_gathers); pgd_t swapper_pg_dir[PTRS_PER_PGD] __attribute__((__aligned__(PAGE_SIZE))); char empty_zero_page[PAGE_SIZE] __attribute__((__aligned__(PAGE_SIZE))); -void diag10(unsigned long addr) -{ - if (addr >= 0x7ff00000) - return; - asm volatile( -#ifdef CONFIG_64BIT - " sam31\n" - " diag %0,%0,0x10\n" - "0: sam64\n" -#else - " diag %0,%0,0x10\n" - "0:\n" -#endif - EX_TABLE(0b,0b) - : : "a" (addr)); -} - void show_mem(void) { int i, total = 0, reserved = 0; -- cgit v1.2.2