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s390/pgtable: introduce and use generic csp inline asm 

We have already two inline assemblies which make use of the csp
instruction. Since I need a third instance let's introduce a generic
inline assmebly which can be used by everyone.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens 2016-05-14 10:46:33 +02:00 committed by Martin Schwidefsky
parent fd346c9dae
commit 4ccccc522b
2 changed files with 18 additions and 19 deletions
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24
arch/s390/include/asm/pgtable.h
View File

@ -424,6 +424,19 @@ static inline int mm_use_skey(struct mm_struct *mm)
return 0;
}
static inline void csp(unsigned int *ptr, unsigned int old, unsigned int new)
{
register unsigned long reg2 asm("2") = old;
register unsigned long reg3 asm("3") = new;
unsigned long address = (unsigned long)ptr | 1;
asm volatile(
" csp %0,%3"
: "+d" (reg2), "+m" (*ptr)
: "d" (reg3), "d" (address)
: "cc");
}
/*
* pgd/pmd/pte query functions
*/
@ -1068,15 +1081,8 @@ static inline pmd_t mk_pmd_phys(unsigned long physpage, pgprot_t pgprot)
static inline void __pmdp_csp(pmd_t *pmdp)
{
register unsigned long reg2 asm("2") = pmd_val(*pmdp);
register unsigned long reg3 asm("3") = pmd_val(*pmdp) |
_SEGMENT_ENTRY_INVALID;
register unsigned long reg4 asm("4") = ((unsigned long) pmdp) + 5;
asm volatile(
" csp %1,%3"
: "=m" (*pmdp)
: "d" (reg2), "d" (reg3), "d" (reg4), "m" (*pmdp) : "cc");
csp((unsigned int *)pmdp + 1, pmd_val(*pmdp),
pmd_val(*pmdp) | _SEGMENT_ENTRY_INVALID);
}
static inline void __pmdp_idte(unsigned long address, pmd_t *pmdp)

13
arch/s390/include/asm/tlbflush.h
View File

@ -5,6 +5,7 @@
#include <linux/sched.h>
#include <asm/processor.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
/*
* Flush all TLB entries on the local CPU.
@ -44,17 +45,9 @@ void smp_ptlb_all(void);
*/
static inline void __tlb_flush_global(void)
{
register unsigned long reg2 asm("2");
register unsigned long reg3 asm("3");
register unsigned long reg4 asm("4");
long dummy;
unsigned int dummy = 0;
dummy = 0;
reg2 = reg3 = 0;
reg4 = ((unsigned long) &dummy) + 1;
asm volatile(
" csp %0,%2"
: : "d" (reg2), "d" (reg3), "d" (reg4), "m" (dummy) : "cc" );
csp(&dummy, 0, 0);
}
/*